CN114427380B - Underground fluid unidirectional-conduction high-speed stop valve and method for using same - Google Patents

Abstract

The invention discloses a downhole fluid unidirectional-conduction high-speed stop valve, which comprises a central tube and an outer tube, wherein an accommodating space is formed between the central tube and the outer tube, a multi-stage outer guide cylinder, a multi-stage inner guide cylinder, an outer guide cylinder and an inner guide cylinder are also arranged in the accommodating space, the upper end part of the outer tube is connected with the central tube in a positioning way through an upper gland, the lower end part of the outer tube is connected with the central tube in a positioning way through a lower gland, gaps are formed between the inner guide cylinder, the outer guide cylinder and the inner guide cylinder, and the gaps are formed between the inner guide cylinder and the inner guide cylinder, and the gaps form a continuous structure channel in the accommodating space. The invention controls the flow speed by utilizing the diversion and backflow functions of the continuous structure channels, and ensures the exploitation safety of the oil well. The invention also discloses a method for applying the downhole fluid to unidirectionally conduct the high-speed stop valve, and the method is used for injecting the fluid into the stratum. The valve body of the device has no moving parts, and is high in reliability and easy to construct and install.

Description

Underground fluid unidirectional-conduction high-speed stop valve and method for using same

Technical Field

The invention relates to the technical field of underground tools for petroleum exploitation, in particular to a high-speed stop valve for unidirectional conduction of underground fluid and a method for using the same.

Background

At present, in a hydraulic control separate layer water injection and oil extraction process pipe column of an oil exploitation well, a one-way conduction valve used under the well is generally conducted in a one-way by means of a ball or a spring, and when the other direction is pressed, a channel of the one-way conduction valve is blocked, so that the functions of preventing reverse sand discharge and well control safety are realized, and the oil exploitation safety is ensured.

In order to adapt to actual working conditions, injection or extraction of fluid is required under the state that low-speed flow of oil well fluid is safely controlled, when the existing one-way conduction valve is used, when the fluid speed is increased to a designed critical value, the flow speed is not easy to control due to the fact that a corresponding flow speed control structure does not exist in the one-way valve, an oil layer is easy to be impacted and damaged due to the fact that the fluid speed injected by a water injection well is too high, or an oil reservoir is easy to cause abnormal such as well kick and blowout due to the fact that the fluid speed injected by the water injection well is too high.

The design of a downhole fluid unidirectional-conduction high-speed stop valve with a flow rate control structure is a problem to be solved.

And (5) search and comparison: keyword underground fluid high-speed stop valve and oil exploitation stop valve.

Comparative document 1, publication (bulletin) No.: CN209638400U, publication (bulletin) day: 2019-11-15 discloses a stop valve for petroleum exploitation, which comprises a shell, the upper end middle part surface fixed mounting of shell has the sleeve, the upper end surface fixed mounting of sleeve has a disc, the upper end surface fixed mounting of a disc has No. two discs, the upper end middle part surface fixed mounting of No. two discs has the screwed ring, the upper end surface fixed mounting of screwed ring has the bellows, the inside of shell is provided with interlayer and valve block, the valve block is located the upper end of interlayer, the upper end middle part surface fixed mounting of valve block has the screw rod. A stop valve for oil exploitation is provided with a corrugated pipe, a rubber ring and a bayonet through hole, can provide protection for a screw rod, can further strengthen tightness, can also prevent each component from being worn, increases the moving range of a valve plate, passes through the bayonet through hole, and causes the stop valve to lose effect, thereby bringing better use prospect. The technical scheme, technical problems and technical effects of the above disclosed technology are not relevant to the invention.

Comparative document 2, publication (bulletin) No.: CN202370476U, publication (bulletin) day: 2012-08-08 discloses a stop valve comprising a valve core, a valve body, a sealing member and an end cover. A valve core is arranged in the valve body, a sealing element is arranged on the valve core, and an end cover is arranged at one end of the valve body. The oil theft valve has the characteristics of preventing oil theft valve accidents and environmental pollution accidents, reducing the running cost of enterprises, adopting welding, screw threads and buckle connection, being simple in structure, firm and durable in welding connection, not easy to be stolen, beneficial to management and the like, and can be widely applied to oil exploitation wellhead Christmas trees. The technical scheme, technical problems and technical effects of the above disclosed technology are not relevant to the invention.

Comparative document 3, publication (bulletin) No.: CN2145290Y, publication (bulletin) day: 1993-11-03 relates to a stop valve for industrial pipelines, which is particularly suitable for various oil, gas and water pipelines in the petroleum exploitation process. The valve mainly comprises a valve body, a gland, a bushing, a plunger, a hand wheel and a valve rod. The valve is characterized in that the plunger is a hollow cylinder, the outer circular surface of the plunger is provided with a track which is in sliding fit with a groove in the valve body, the lower part of the plunger is provided with a taper of 45-60 degrees, and hard alloy is deposited; the lower part of the plunger is provided with a seal; a valve rod gasket or a marble disk is arranged between the gland and the bushing; a sealing culvert and a sealing gasket are arranged between the valve body and the plunger. The stop valve with simple structure has the advantages that the valve rod only rotates, the hydraulic self-balancing switch which does not move up and down is portable, and the sealing performance is good. The technical scheme, technical problems and technical effects of the above disclosed technology are not relevant to the invention.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a downhole fluid one-way conduction high-speed stop valve. The valve body can effectively avoid sand production caused by flushing of injection fluid into stratum, prevent the occurrence of impact damage to an oil layer due to overlarge speed of the fluid injected into the water injection well, and ensure the exploitation safety of an oil well.

In order to solve the technical problems, the invention provides the following technical scheme:

The utility model provides a downhole fluid unidirectional conduction high-speed stop valve, includes the center tube, the cover is in the outside outer tube of center tube, center tube and outer tube's central axis coincide mutually, form an accommodation space between center tube and the outer tube, the cover is gone up top-down in the accommodation space and is inlayed in order and is provided with multistage outer guide cylinder, the outer guide cylinder is less than the distance between center tube and the outer tube on outer tube radial section unilateral, the cover is inlayed in order for the center tube in the accommodation space department top-down in the outer tube department of inlaying, the width of inner guide cylinder on outer tube radial section unilateral is less than the distance between center tube and the outer tube, top-down still overlaps between inner guide cylinder and the outer guide cylinder in the accommodation space is inlayed and is provided with outer guide cylinder and interior guide cylinder, be connected through the gland location between the upper end of outer tube and the center tube, be connected through the gland location between outer guide cylinder, wherein, outer guide cylinder and interior guide cylinder have the annular structure on the radial section of special-shaped on the outer tube, outer guide cylinder and interior guide cylinder, the inner guide cylinder and the inner guide cylinder have the gap between outer guide cylinder and the outer cylinder, the inner guide cylinder and the inner guide cylinder between the outer cylinder and the inner guide cylinder.

The downhole fluid one-way on high-speed stop valve and the method for using the same have at least the following advantages,

1. The invention designs a continuous structure channel formed by filling an inner guide cylinder, an outer guide cylinder, an inner guide cylinder and an outer guide cylinder in an outer pipe, so as to form a valve body capable of enabling fluid to normally circulate at a low speed in one direction, blocking at a high speed and rapidly and continuously pass in the other direction. Compared with the traditional one-way conducting valve without the flow rate control structure, when the flow rate of injected water is too high, for example, the fluid speed is increased to a designed critical value, due to the diversion and backflow effects of a continuous structure channel, backflow hydraulic force is easily formed, the hydraulic force of injected fluid is weakened, even the injected fluid is completely prevented from entering into stratum, sand production caused by flushing of the injected fluid into the stratum is effectively avoided, the flow rate is controlled, the phenomenon that an oil layer is easily impacted and damaged due to the fact that the speed of the injected fluid of a water injection well is too high, or abnormal conditions such as kick and blowout are easily caused by excessive oil production due to the fact that the speed of the injected fluid of the water injection well is too high in an oil reservoir are prevented, and the exploitation safety of an oil well is guaranteed.

2. Compared with the situation that the unidirectional conduction valve used in the traditional underground is generally realized by means of a ball or a spring, the valve body of the device has no moving parts, has high reliability and is easy to construct and install;

3. When the invention is used, the fluid flow rate of any layer can be limited according to the constant pressure of the actual working condition. When the device is used in an oil well, the production speed can be controlled, and the well can be quickly controlled when abnormal situations are met; when the device is used in a water well, the injection speed can be controlled, and the sand is prevented from being produced by impacting the oil reservoir.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of a downhole fluid one-way on high-speed shut-off valve according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the first stage outer guide shell of the embodiment of the present invention on the right single side of the axial section of the outer tube;

FIG. 3 is a schematic view of the structure of the second-stage outer guide cylinder on the right single side of the axial section of the outer pipe according to the embodiment of the invention;

FIG. 4 is a schematic view of the structure of the three-stage outer guide shell of the embodiment of the invention on the right single side of the axial section of the outer tube;

FIG. 5 is a schematic view of the structure of the first stage inner guide shell on the right single side of the axial section of the outer tube according to the embodiment of the invention;

FIG. 6 is a schematic view of the structure of the second stage inner guide shell of the embodiment of the present invention on the right single side of the axial section of the outer tube;

FIG. 7 is a schematic view of the structure of the three-stage inner guide shell on the right single side of the axial section of the outer tube according to the embodiment of the invention;

FIG. 8 is a schematic top view of the relative positions of the first positioning pawl and the second positioning pawl of the outer cylinder on the radial cross section of the outer tube in an embodiment of the present invention;

FIG. 9 is a schematic perspective view of an outer cylinder according to an embodiment of the present invention;

FIG. 10 is a schematic top view of the relative positions of the first inner cylinder locating detent and the second inner cylinder locating detent on the radial cross section of the outer tube in an embodiment of the present invention;

FIG. 11 is a schematic perspective view of an inner circular guide shell according to an embodiment of the present invention;

FIG. 12 is a schematic view showing the overall structure of a downhole fluid one-way high-speed shut-off valve according to embodiment 2 of the present invention;

Wherein 1-a central tube, 101-a sealing step, 102-a first liquid outlet, 103-an inner guide cylinder limiting step, 2-an upper gland, 3-a first-stage outer guide cylinder, 301-a first special-shaped sealing step, 302-a first special-shaped straight line second side, 303-a first special-shaped straight line first side, 304-a first special-shaped straight line third side, 305-a first special-shaped straight line fourth side, 4-an outer guide cylinder, 401-an outer guide cylinder first positioning claw, 402-a seventh special-shaped straight line first side, 403-a seventh special-shaped arc second side, 404-an outer guide cylinder second positioning claw, 405-a seventh special-shaped straight line third side, 5-a first-stage inner guide cylinder, 501-a fourth special-shaped straight line fifth side, 502-a fourth special-shaped straight line fourth side, 503-fourth special-shaped straight line first side, 504-fourth special-shaped straight line second edge, 505-fourth special-shaped straight line third edge, 6-second-stage outer guide cylinder, 601-second special-shaped sealing step, 602-second special-shaped arc line second edge, 603-second special-shaped straight line third edge, 604-second special-shaped straight line fourth edge, 605-second special-shaped straight line first edge, 606-second special-shaped straight line fifth edge, 607-second special-shaped straight line sixth edge, 7-inner guide cylinder, 701-inner guide cylinder first positioning claw, 702-eighth special-shaped straight line first edge, 703-eighth special-shaped straight line third edge, 704-eighth special-shaped arc line second edge, 705-inner guide cylinder second positioning claw, 8-second-stage inner guide cylinder, 801-fifth special-shaped sealing step, 802-fifth special-shaped arc line sixth edge, 803-fifth special-shaped straight line fifth edge, 804-fifth special-shaped straight line fourth edge, 805-fourth special-shaped straight line first edge, 806-fifth special-shaped straight line second edge, 807-fifth special-shaped straight line third edge, 9-third special-shaped outer guide cylinder, 901-third special-shaped sealing step, 902-third special-shaped arc line second edge, 903-third special-shaped straight line third edge, 904-third special-shaped straight line fourth edge, 905-third special-shaped straight line first edge, 906-third special-shaped straight line fifth edge, 907-third special-shaped straight line sixth edge, 10-third special-shaped inner guide cylinder, 1001-sixth special-shaped sealing step, 1002-sixth special-shaped arc line fifth edge, 1003-sixth special-shaped straight line fourth edge, 1004-sixth special-shaped straight line first edge, 1005-sixth special-shaped straight line second edge, 1006-sixth special-shaped straight line third edge, 11-flywheel type stop ring, 1101-pin, 1102-second liquid outlet hole, 12-outer tube, 1201-third liquid outlet hole, 13-lower gland.

Detailed Description

The invention will be further described with reference to the drawings and examples.

The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the claims. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.

Example 1:

Referring to fig. 1-11, a downhole fluid unidirectional-conduction high-speed stop valve comprises a central tube 1 and an outer tube 12 sleeved outside the central tube, central axes of the central tube 1 and the outer tube 12 are overlapped, a containing space is formed between the central tube 1 and the outer tube 12, multi-stage outer guide barrels are sequentially sleeved on the central tube 1 from top to bottom in the containing space, the width of the outer guide barrels on a single side surface of a radial section of the outer tube is smaller than the distance between the central tube 1 and the outer tube 12, multi-stage inner guide barrels are sequentially sleeved on the position, where the outer tube is attached, of the containing space from top to bottom relative to the central tube, the width of the inner guide barrels on the single side surface of the radial section of the outer tube is smaller than the distance between the central tube 1 and the outer tube 12, the inner guide cylinder and the outer guide cylinder in the accommodating space are sleeved with the outer guide cylinder 4 and the inner guide cylinder 7 from top to bottom, the upper end part of the outer tube 12 is in positioning connection with the central tube 1 through the upper gland 2, the lower end part of the outer tube 12 is in positioning connection with the central tube 1 through the lower gland 13, the inner guide cylinder, the outer guide cylinder 4 and the inner guide cylinder 7 are all of annular structures with special shapes on the axial section of the outer tube, and gaps are formed between the inner guide cylinder and the outer guide cylinder, between the inner guide cylinder and the outer guide cylinder 4, between the outer guide cylinder and the outer guide cylinder 4, between the inner guide cylinder and the inner guide cylinder 7 and between the outer guide cylinder and the inner guide cylinder 7, and form a continuous structure channel in the accommodating space.

In the working state, ground injection water can be injected into the stratum along a continuous structure formed by filling the inner guide cylinder, the outer guide cylinder, the inner guide cylinder and the outer guide cylinder in the outer pipe.

The upper side of the central tube 1 is provided with a sealing step 101, the upper side of the central tube 1 is also provided with a first liquid outlet hole 102, the first liquid outlet hole 102 is positioned below the sealing step 101, the sealing step 101 is positioned below the upper end part of the outer tube 12, the upper side of the central tube 12 is also provided with an inner guide cylinder limiting step 103, and the inner guide cylinder limiting step 103 is positioned below the first liquid outlet hole 102. The inner guide cylinder limiting step 103 plays an auxiliary fixing role on the inner guide cylinder.

The lower part of the central tube 1 is also provided with a flywheel type stop ring 11, the flywheel type stop ring 11 is fixed on the outer tube 12 through a pin 1101, the flywheel type stop ring 11 is positioned on the upper part of the lower gland 13, and second liquid outlet holes 1102 are uniformly distributed on the flywheel type stop ring 11.

The bottom of the outer tube 12 is also provided with a third liquid outlet hole 1201, and the third liquid outlet hole 1201 is located between the flywheel type stop ring 11 and the lower gland 13.

The outer guide cylinder is three-level and comprises a first-level outer guide cylinder 3, a second-level outer guide cylinder 6 and a third-level outer guide cylinder 9, the first-level outer guide cylinder 3, the second-level outer guide cylinder 6 and the third-level outer guide cylinder 9 are sequentially arranged from top to bottom at the position where the outer pipe 12 is attached in the accommodating space, the inner guide cylinder is three-level and comprises a first-level inner guide cylinder 5, a second-level inner guide cylinder 8 and a third-level inner guide cylinder 10, and the first-level inner guide cylinder 5, the second-level inner guide cylinder 8 and the third-level inner guide cylinder 10 are sequentially arranged from top to bottom at the position where the outer pipe 12 is attached in the accommodating space.

The shape of the right single side surface of the axial section of the outer tube 12 of the first-stage outer guide cylinder 3 is a first special-shaped structure, and the first special-shaped structure comprises:

a first profiled straight first edge 303;

the first irregular straight line second side 302, one end of the first irregular straight line second side 302 is connected with one end of the first irregular straight line first side 303, an alpha 1 angle is formed between the two straight lines, and the alpha 1 angle is 60-75 degrees;

the first special-shaped straight line third side 304 is arranged in parallel with the first special-shaped straight line first side 303, and one end of the first special-shaped straight line third side 304 is connected with the other end of the first special-shaped straight line second side 302;

A first irregular straight line fourth side 305 which is perpendicular to the first irregular straight line third side 304 and is on the same side of the first irregular straight line third side 304 as the first irregular straight line second side 302, one end of the first irregular straight line fourth side 305 is connected with the other end of the first irregular straight line third side 304, the other end of the first irregular straight line fourth side 305 is connected with the other end of the first irregular straight line first side 303,

Wherein a gap first special-shaped sealing step 301 is formed between the first special-shaped straight line first edge 303 and the first special-shaped straight line fourth edge 305;

The shape of the right single side surface of the axial section of the outer tube 12 of the second-stage outer guide cylinder 6 is a second special-shaped structure, and the second special-shaped structure comprises:

A second profiled straight first edge 605;

the second side 602 of the second special-shaped arc line, one end of the second side 602 of the second special-shaped arc line is connected with one end of the first side 605 of the second special-shaped straight line;

The third side 603 of the second special-shaped line forms an angle alpha 2 with the first side 605 of the second special-shaped line, the angle alpha 2 is 60-75 degrees, and one end of the third side 603 of the second special-shaped line is connected with the other end of the second side 602 of the second special-shaped arc line;

the second special-shaped straight line fourth side 604 forms an angle alpha 3 with the second special-shaped straight line third side 603, the angle alpha 3 is the sum of the angle alpha 1 and the angle alpha 2, and one end of the second special-shaped straight line fourth side 604 is connected with the other end of the second special-shaped straight line third side 603;

The second special-shaped straight line fifth side 606 is parallel to the second special-shaped straight line first side 605, and one end of the second special-shaped straight line fifth side 606 is connected with the other end of the second special-shaped straight line fourth side 604;

the second special-shaped straight line sixth side 607 is perpendicular to the second special-shaped straight line fifth side 606, one end of the second special-shaped straight line sixth side 607 is connected with the other end of the second special-shaped straight line fifth side 606, the other end of the second special-shaped straight line sixth side 607 is connected with the other end of the second special-shaped straight line first side 605, wherein the arc-shaped bulge of the second special-shaped arc line second side 602 faces the direction of the second special-shaped straight line sixth side 607, and a gap second special-shaped sealing step 601 is formed between the second special-shaped straight line first side 605 and the second special-shaped straight line sixth side 607;

The shape of the right single side surface of the axial section of the outer tube 12 of the three-stage outer guide cylinder 9 is a third special-shaped structure, and the third special-shaped structure comprises:

a third profiled straight first edge 905;

The second edge 902 of the third special-shaped arc line, one end of the second edge 902 of the third special-shaped arc line is connected with one end of the first edge 905 of the third special-shaped line;

The third edge 903 of the third special-shaped line forms an angle alpha 4 with the first edge 905 of the third special-shaped line, the angle alpha 4 is the same as the angle alpha 2, and one end of the third edge 903 of the third special-shaped line is connected with the other end of the second edge 902 of the third special-shaped arc line;

The third special-shaped line fourth side 904 forms an angle alpha 5 with the third special-shaped line third side 903, the angle alpha 5 is the same as the angle alpha 3, and one end of the third special-shaped line fourth side 904 is connected with the other end of the third special-shaped line third side 903;

A third special-shaped straight line fifth edge 906 which is parallel to the third special-shaped straight line first edge 905, and one end of the third special-shaped straight line fifth edge 906 is connected with the other end of the third special-shaped straight line fourth edge 904;

The third special-shaped line sixth side 907 is perpendicular to the third special-shaped line fifth side 906, one end of the third special-shaped line sixth side 907 is connected with the other end of the third special-shaped line fifth side 906, and the other end of the third special-shaped line sixth side 907 is connected with the other end of the third special-shaped line first side 905; wherein, the arc-shaped protrusion of the second side 902 of the third special-shaped arc line faces the direction of the sixth side 907 of the third special-shaped line, and a gap third special-shaped sealing step 901 is formed between the first side 905 of the third special-shaped line and the sixth side 907 of the third special-shaped line;

the shape of the right single side surface of the axial section of the outer tube 12 of the first-stage inner guide cylinder 5 is a fourth special-shaped structure, and the fourth special-shaped structure comprises:

a fourth profiled straight first edge 503;

The second edge 504 of the fourth special-shaped line is perpendicular to the first edge 503 of the fourth special-shaped line, and one end of the second edge 504 of the fourth special-shaped line is connected with one end of the first edge 503 of the fourth special-shaped line;

The third side 505 of the fourth special-shaped line is parallel to the first side 503 of the fourth special-shaped line, one end of the third side 505 of the fourth special-shaped line is connected with the other end of the second side 504 of the fourth special-shaped line, and the third side 505 of the fourth special-shaped line and the first side 503 of the fourth special-shaped line are on the same side face of the second side 504 of the fourth special-shaped line;

and a fourth irregular straight line fourth side 502, wherein one end of the fourth irregular straight line fourth side 502 is connected with one end of a fourth irregular straight line third side 505, the fourth irregular straight line fourth side 502 and the fourth irregular straight line third side 505 form an alpha 6 angle, and the alpha 6 angle is an alpha 2 complement angle.

The fourth special-shaped straight line fifth side 501, one end of the fourth special-shaped straight line fifth side 501 is connected with the other end of the fourth special-shaped straight line fourth side 502, the other end of the fourth special-shaped straight line fifth side 501 is connected with the other end of the fourth special-shaped straight line first side 503, the fourth special-shaped straight line fifth side 501 and the fourth special-shaped straight line fourth side 502 form an alpha 7 angle, and the alpha 7 angle is the same as the alpha 3 angle.

The shape of the right single side surface of the axial section of the outer tube of the second-stage inner guide cylinder 8 is a fifth special-shaped structure, and the fifth special-shaped structure comprises:

A fifth profiled straight first edge 805;

The second edge 806 of the fifth special-shaped line is perpendicular to the first edge 805 of the fourth special-shaped line, and one end of the second edge 806 of the fifth special-shaped line is connected with one end of the first edge 805 of the fourth special-shaped line;

A fifth special-shaped line third side 807 parallel to the fifth special-shaped line first side 805, one end of the fifth special-shaped line third side 807 being connected to the other end of the fifth special-shaped line second side 806, and the fifth special-shaped line third side 807 being on the same side of the fifth special-shaped line second side 806 as the fifth special-shaped line first side 805;

A fifth special-shaped line fourth side 804, which forms an angle alpha 8 with the fifth special-shaped line third side 807, wherein the angle alpha 8 is the same as the angle alpha 6, and one end of the fifth special-shaped line fourth side 804 is connected with the other end of the fifth special-shaped line third side 807;

And one end of the fifth irregular line fifth side 803 is connected with the other end of the fifth irregular line fourth side 804, the fifth irregular line fifth side 803 and the fifth irregular line fourth side 804 form an angle alpha 9, and the angle alpha 9 is the same as the angle alpha 3.

A fifth special-shaped arc line sixth side 802, wherein one end of the fifth special-shaped arc line sixth side 802 is connected with the other end of the fifth special-shaped line fifth side 803, and an arc-shaped bulge of the fifth special-shaped arc line sixth side 802 faces the direction of a fifth special-shaped line second side 806, wherein a gap fifth special-shaped sealing step 801 is formed between the fifth special-shaped line first side 805 and the fifth special-shaped line second side 806;

The shape of the right single side surface of the axial section of the outer tube 12 of the three-stage inner guide cylinder 10 is a sixth special-shaped structure, and the sixth special-shaped structure comprises:

A sixth profiled straight first edge 1004;

A sixth special-shaped straight line second edge 1005 is connected with one end of the sixth special-shaped straight line first edge 1004, and the sixth special-shaped straight line second edge 1005 is perpendicular to the sixth special-shaped straight line first edge 1004;

A sixth shaped line third side 1006 parallel to the sixth shaped line first side 1004, wherein one end of the sixth shaped line third side 1006 is connected to the other end of the sixth shaped line second side 1005, and the sixth shaped line third side 1006 and the sixth shaped line first side 1004 are on the same side of the sixth shaped line second side 1005;

the sixth special-shaped straight line fourth side 1003 forms an angle alpha 10 with the sixth special-shaped straight line third side 1006, the angle alpha 10 is the same as the angle alpha 1, and one end of the sixth special-shaped straight line fourth side 1003 is connected with the other end of the sixth special-shaped straight line third side 1006;

a fifth side 1002 of a sixth special-shaped arc line, one end of the fifth side 1002 of the sixth special-shaped arc line is connected with the other end of the fourth side 1003 of the sixth special-shaped line, the other end of the fifth side 1002 of the sixth special-shaped arc line is connected with the other end of the first side 1004 of the sixth special-shaped line, and the arc-shaped bulge of the fifth side 1002 of the sixth special-shaped arc line faces the direction of the second side 1005 of the sixth special-shaped line, wherein a gap sixth special-shaped sealing step 1001 is formed between the first side 1004 of the sixth special-shaped line and the second side 1005 of the sixth special-shaped line;

The shape of the right single side surface of the axial section of the outer tube of the outer cylinder guide cylinder is a seventh special-shaped structure, and the seventh special-shaped structure comprises:

a seventh shaped straight line first side 402,

A seventh special-shaped arc line second edge 403, wherein one end of the seventh special-shaped arc line second edge 403 is connected with one end of a seventh special-shaped straight line first edge 402;

A seventh special-shaped straight line third side 405, wherein one end 405 of the seventh special-shaped straight line third side is connected with one end of a seventh special-shaped arc line second side 403, the other end 405 of the seventh special-shaped straight line third side is connected with the other end 402 of the seventh special-shaped straight line, and the arc-shaped bulge of the seventh special-shaped arc line second side 403 is opposite to an included angle formed by the seventh special-shaped straight line third side 405 and the seventh special-shaped straight line first side 402;

The shape of the right single side surface of the axial section of the outer tube of the inner circular guide cylinder is an eighth special-shaped structure, and the eighth special-shaped structure comprises:

an eighth shaped straight line first side 702;

An eighth special-shaped arc second edge 704, wherein one end of the eighth special-shaped arc second edge 704 is connected with one end of the eighth special-shaped straight line first edge 702;

eighth shaped straight third side 703;

One end of an eighth special-shaped straight line third side 703 is connected with one end of an eighth special-shaped arc line second side 704, and the other end of the eighth special-shaped straight line third side 703 is connected with the other end of the eighth special-shaped straight line first side 702, wherein the arc-shaped bulge of the eighth special-shaped arc line second side 704 faces away from an included angle formed by the eighth special-shaped straight line third side 703 and the eighth special-shaped straight line first side 702;

wherein, the included angle between the seventh special-shaped straight line first edge 402 and the central axis of the outer tube, the included angle between the eighth special-shaped straight line first edge 702 and the central axis of the outer tube, and the included angle between the first special-shaped straight line second edge 302 and the central axis of the outer tube are all the same; the included angle between the seventh special-shaped line third side 405 and the central axis of the outer tube, the included angle between the eighth special-shaped line third side 703 and the central axis of the outer tube, and the included angle between the fourth special-shaped line fourth side and the central axis of the outer tube are all the same.

The first special-shaped linear first edge 303 is in sealing connection with the upper gland 2 through a first special-shaped sealing step 301, and a gap between the first special-shaped sealing step and the upper gland is filled with a sealing material such as a sealing strip; the first shaped third edge 304 and the second shaped first edge 605 are connected in a sealing way by a second shaped sealing step 601, a sealing material such as a sealing strip is filled in a gap between the second shaped sealing step and the first shaped third edge 304, the second shaped fifth edge 606 and the third shaped first edge 905 are connected in a sealing way by a third shaped sealing step 901, a sealing material such as a sealing strip is filled in a gap between the third shaped sealing step and the second shaped fifth edge 606, one end of the fourth shaped first edge 503 is contacted with the inner guide cylinder limiting step 101, the fourth shaped third edge 505 and the fifth shaped first edge 805 are connected in a sealing way by a fifth shaped sealing step 801, a sealing material such as a sealing strip is filled in a gap between the fifth shaped sealing step and the fourth shaped third edge 505, the fifth special-shaped straight line third side 807 and the sixth special-shaped straight line first side 1004 are in sealing connection through a sixth special-shaped sealing step 1001, a sealing material such as a sealing strip is filled in a gap between the sixth special-shaped sealing step and the fifth special-shaped straight line third side 807, the first special-shaped straight line second side 302, the second special-shaped straight line fourth side 604, the third special-shaped straight line fourth side 904, the fourth special-shaped straight line fifth side 501, the fifth special-shaped straight line fifth side 803 and the sixth special-shaped straight line fourth side 1003 are all parallel to each other, the second special-shaped straight line third side 603, the third special-shaped straight line third side 903, the fourth special-shaped straight line fourth side 502 and the fifth special-shaped straight line fourth side 804 are all parallel to each other, the radians of the second special-shaped arc line second side 602, the third special-shaped arc line second side 902, the fifth special-shaped arc line sixth side 802, the sixth special-shaped arc fifth side 1002, the seventh special-shaped arc second side 403 and the eighth special-shaped arc second side 704 are all the same,

An outer cylinder first positioning claw 401 is arranged at the intersection of a seventh special-shaped straight line first edge 402 and a seventh special-shaped straight line second edge 405 of the outer cylinder of the annular structure, the outer cylinder first positioning claw 401 is distributed in an annular array relative to the center of the outer cylinder on the radial section of the outer tube, an outer cylinder second positioning claw 404 is arranged at the intersection of a seventh special-shaped straight line third edge 405 and a seventh special-shaped arc line second edge 403 of the outer cylinder of the annular structure, the outer cylinder second positioning claw 404 is distributed in an annular array relative to the center of the outer cylinder on the radial section of the outer tube, an inner cylinder first positioning claw 701 is arranged at the intersection of an eighth special-shaped straight line first edge 702 and an eighth special-shaped straight line second edge 703 of the inner cylinder of the annular structure, the first positioning claws 701 of the inner circular guide cylinder are distributed in an annular array relative to the center of the inner circular guide cylinder on the radial section of the outer tube, the second positioning claws 705 of the inner circular guide cylinder are arranged at the intersection of the third edge 703 of the eighth special-shaped straight line of the inner circular guide cylinder and the second edge 704 of the eighth special-shaped arc line of the annular structure, the second positioning claws 705 of the inner circular guide cylinder are distributed in an annular array relative to the center of the inner circular guide cylinder on the radial section of the outer tube, and the lengths of the first positioning claws 401 of the outer circular guide cylinder, the second positioning claws 404 of the outer circular guide cylinder, the first positioning claws 701 of the inner circular guide cylinder and the second positioning claws 705 of the inner circular guide cylinder are the same as the width of the interval gap between the inner guide cylinder and the outer guide cylinder. The outer cylinder is supported and arranged between the inner cylinder and the outer cylinder through the outer cylinder first positioning claw 401 and the outer cylinder second positioning claw 404, and the inner cylinder is supported and arranged between the inner cylinder and the outer cylinder through the inner cylinder first positioning claw 701 and the inner cylinder second positioning claw 705, so that the arrangement of the positioning claws plays a role in supporting the arrangement positions of the outer cylinder and the inner cylinder in the accommodating space.

Compared with the traditional underground one-way conduction valve which is generally conducted by means of a ball or a spring, the valve body of the device has no moving parts, is high in reliability and is easy to construct and install. In the invention, gaps are arranged between the inner guide cylinder and the outer guide cylinder, between the inner guide cylinder and the outer guide cylinder 4, between the outer guide cylinder and the outer guide cylinder 4, between the inner guide cylinder and the inner guide cylinder 7 and between the outer guide cylinder and the inner guide cylinder 7, and a continuous structure channel is formed in the accommodating space by the gaps. The structure channel can enable the fluid to normally circulate at a low speed in one direction and to be blocked at a high speed, and the fluid can pass through the valve body in the other direction in a rapid and continuous manner, so that the control of the flow velocity is facilitated, and the exploitation safety of an oil well is ensured.

The method for applying the downhole fluid one-way conduction high-speed stop valve is characterized by being applied to the downhole fluid one-way conduction high-speed stop valve, and comprises the following steps of:

s1, connecting a central pipe 1 to a water injection well process pipe column, and putting into a water injection layer, wherein ground injection water enters a first liquid outlet hole 102 of the central pipe 1 through the process pipe column;

S2, the injected fluid flows through a continuous structure channel formed by filling the inner guide cylinder, the outer guide cylinder, the inner guide cylinder 7 and the outer guide cylinder 4 in the outer pipe 12, enters the second liquid outlet hole of the flywheel type stop ring 11 and the third liquid outlet hole of the outer pipe 12, and is injected into the stratum.

When the flow rate of the injected water is too high, for example, the fluid speed is increased to a designed critical value, the backflow hydraulic force is easy to form due to the diversion and backflow effects of the continuous structure channel, the hydraulic force of the injected fluid is weakened, even the injected fluid is completely prevented from entering the stratum, sand production caused by flushing the stratum by the injected fluid is effectively avoided, the flow rate is controlled, the phenomenon that an oil layer is easily impacted and damaged due to the too high speed of the injected fluid of the water injection well or abnormal conditions such as well kick and blowout caused by the too high speed of the injected fluid of the water injection well are prevented from occurring in an oil reservoir, and the exploitation safety of an oil well is ensured. When the invention is used, the fluid flow rate of any layer can be limited according to the constant pressure of the actual working condition. When the device is used in an oil well, the production speed can be controlled, and the well can be quickly controlled when abnormal situations are met; when the device is used in a water well, the injection speed can be controlled, and the sand is prevented from being produced by impacting the oil reservoir.

Example 2:

Referring to fig. 12, unlike embodiment 1, in this embodiment, the first-stage outer guide cylinder 3, the second-stage outer guide cylinder 6 and the third-stage outer guide cylinder 9 are sequentially sleeved and embedded with respect to the central tube from bottom to top at the position where the outer tube 12 is attached in the accommodating space, and the first-stage inner guide cylinder 5, the second-stage inner guide cylinder 8 and the third-stage inner guide cylinder 10 are sequentially sleeved and embedded with respect to the central tube from bottom to top in the accommodating space. The outer cylinder guide cylinder 4 and the inner cylinder guide cylinder 7 are also reversely and inversely arranged in the outer tube 12. The scheme can be used in an oil or gas well for controlling the production rate of a hydrocarbon reservoir. When the output speed exceeds the critical value, the output value is reduced, the wellhead metering is reduced, the injection well killing liquid can rapidly enter the hydrocarbon producing layer for treatment, the output speed of the hydrocarbon producing layer is reduced, the well kick and blowout are prevented, the shaft is effectively protected, the period of the oil well is prolonged, and the output rate of the hydrocarbon reservoir is improved.

In the application, all parts which are not expanded and discussed and the connecting mode of all parts in the application belong to the known technology in the technical field, and are not repeated. Such as welding, threaded connections, etc.

In the present invention, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a downhole fluid unidirectional conduction high-speed stop valve which is characterized in that, including the center tube, the cover inlay the outer tube outside the center tube, center axis phase coincidence of center tube and outer tube, form an accommodation space between center tube and the outer tube, the cover inlay in proper order is provided with multistage outer guide cylinder in the accommodation space on the center tube top-down, the outer guide cylinder has the width on outer tube radial section unilateral face to be less than the distance between center tube and the outer tube, the cover inlay in proper order is provided with multistage inner guide cylinder in the accommodation space in the outer tube department of laminating top-down relative to the center tube, the width of inner guide cylinder on outer tube radial section unilateral face is less than the distance between center tube and the outer tube, still cover inlay between inner guide cylinder and the outer guide cylinder in the accommodation space is provided with outer guide cylinder and inner guide cylinder between the outer guide cylinder, through upper end and the center tube location connection of upper gland, wherein, outer guide cylinder and inner guide cylinder have the annular structure on the axial section of dysmorphism, between outer guide cylinder and outer guide cylinder, the gap between outer guide cylinder and inner guide cylinder, between guide cylinder and outer guide cylinder space between the gap between the inner guide cylinder and outer guide cylinder and the space;

The side surface of the upper part of the central tube is provided with a sealing step, the side surface of the upper part of the central tube is also provided with a first liquid outlet hole, the first liquid outlet hole is positioned below the sealing step, the sealing step is positioned below the upper end part of the outer tube, the side surface of the upper part of the central tube is also provided with an inner guide cylinder limiting step, and the inner guide cylinder limiting step is positioned below the first liquid outlet hole;

the bottom of the outer tube is also provided with a third liquid outlet hole, and the third liquid outlet hole is positioned between the flywheel type stop ring and the lower gland;

The outer guide cylinder is provided with three stages, including a first-stage outer guide cylinder, a second-stage outer guide cylinder and a third-stage outer guide cylinder, which are sequentially arranged from top to bottom at the position where the outer pipe is attached in the accommodating space; the inner guide cylinder is provided with three stages, including a first-stage inner guide cylinder, a second-stage inner guide cylinder and a third-stage inner guide cylinder, which are sequentially arranged from top to bottom at the position where the outer pipe is bonded in the accommodating space;

The shape of the outer draft tube of one-level is first dysmorphism structure at outer tube axial section right unilateral, first dysmorphism structure includes:

A first profiled straight line first edge;

The first special-shaped straight line second side, one end of the first special-shaped straight line second side is connected with one end of the first special-shaped straight line first side, an alpha 1 angle is formed between the two straight lines, and the alpha 1 angle is 60-75 degrees;

The third side of the first special-shaped straight line is arranged in parallel with the first side of the first special-shaped straight line, and one end of the third side of the first special-shaped straight line is connected with the other end of the second side of the first special-shaped straight line;

a fourth edge of the first special-shaped straight line, which is perpendicular to the third edge of the first special-shaped straight line and is positioned on the same side of the third edge of the first special-shaped straight line as the second edge of the first special-shaped straight line, one end of the fourth edge of the first special-shaped straight line is connected with the other end of the third edge of the first special-shaped straight line, the other end of the fourth edge of the first special-shaped straight line is connected with the other end of the first edge of the first special-shaped straight line,

A gap first special-shaped sealing step is formed between the first special-shaped straight line first edge and the first special-shaped straight line fourth edge;

the shape of the second-stage outer guide cylinder on the right single side surface of the axial section of the outer tube is a second special-shaped structure, and the second special-shaped structure comprises:

A second profiled straight line first edge;

the second side of the second special-shaped arc line, one end of the second side of the second special-shaped arc line is connected with one end of the first side of the second special-shaped straight line;

The third side of the second special-shaped straight line forms an alpha 2 angle with the first side of the second special-shaped straight line, and the alpha 2 angle is 60-75 degrees;

one end of the third side of the second special-shaped straight line is connected with the other end of the second side of the second special-shaped arc line;

the fourth side of the second special-shaped straight line forms an alpha 3 angle with the third side of the second special-shaped straight line, and the alpha 3 angle is the sum of the alpha 1 angle and the alpha 2 angle;

one end of the fourth side of the second special-shaped straight line is connected with the other end of the third side of the second special-shaped straight line;

The second special-shaped straight line fifth side is parallel to the first side of the second special-shaped straight line, and one end of the second special-shaped straight line fifth side is connected with the other end of the second special-shaped straight line fourth side;

One end of the second special-shaped straight line sixth side is perpendicular to the second special-shaped straight line fifth, one end of the second special-shaped straight line sixth side is connected with the other end of the second special-shaped straight line fifth side, the other end of the second special-shaped straight line sixth side is connected with the other end of the second special-shaped straight line first side, wherein an arc-shaped bulge of the second special-shaped arc line second side faces the direction of the second special-shaped straight line sixth side, and a gap second special-shaped sealing step is formed between the second special-shaped straight line first side and the second special-shaped straight line sixth side;

The shape of the third-stage outer guide cylinder on the right single side surface of the axial section of the outer tube is a third special-shaped structure, and the third special-shaped structure comprises:

a third profiled straight line first edge;

The second side of the third special-shaped arc line, one end of the second side of the third special-shaped arc line is connected with one end of the first side of the third special-shaped straight line;

the third side of the third special-shaped line forms an alpha 4 angle with the first side of the third special-shaped line, and the alpha 4 angle is the same as the alpha 2 angle;

one end of a third side of the third special-shaped straight line is connected with the other end of the second side of the third special-shaped arc line;

A third special-shaped straight line fourth side which forms an alpha 5 angle with a third side of the third special-shaped straight line, wherein the alpha 5 angle is the same as the alpha 3 angle;

One end of the fourth side of the third special-shaped line is connected with the other end of the third side of the third special-shaped line;

The fifth edge of the third special-shaped straight line is parallel to the first edge of the third special-shaped straight line, and one end of the fifth edge of the third special-shaped straight line is connected with the other end of the fourth edge of the third special-shaped straight line;

the sixth side of the third special-shaped straight line is perpendicular to the fifth side of the third special-shaped straight line, one end of the sixth side of the third special-shaped straight line is connected with the other end of the fifth side of the third special-shaped straight line, and the other end of the sixth side of the third special-shaped straight line is connected with the other end of the first side of the third special-shaped straight line; the arc-shaped bulge on the second side of the third special-shaped arc line faces to the direction of the sixth side of the third special-shaped straight line, and a gap third special-shaped sealing step is formed between the first side of the third special-shaped straight line and the sixth side of the third special-shaped straight line;

the shape of the first-stage inner guide cylinder on the right single side surface of the axial section of the outer tube is a fourth special-shaped structure, and the fourth special-shaped structure comprises:

a fourth profiled straight line first edge;

The second edge of the fourth special-shaped straight line is perpendicular to the first edge of the fourth special-shaped straight line, and one end of the second edge of the fourth special-shaped straight line is connected with one end of the first edge of the fourth special-shaped straight line;

The third side of the fourth special-shaped straight line is parallel to the first side of the fourth special-shaped straight line, one end of the third side of the fourth special-shaped straight line is connected with the other end of the second side of the fourth special-shaped straight line, and the third side of the fourth special-shaped straight line and the first side of the fourth special-shaped straight line are arranged on the same side face of the second side of the fourth special-shaped straight line;

The fourth special-shaped straight line fourth side, one end of the fourth special-shaped straight line fourth side is connected with one end of the fourth special-shaped straight line third side, the fourth special-shaped straight line fourth side and the fourth special-shaped straight line third side form an alpha 6 angle, and the alpha 6 angle is an alpha 2 complement angle;

A fifth side of the fourth special-shaped straight line, one end of the fifth side of the fourth special-shaped straight line is connected with the other end of the fourth side of the fourth special-shaped straight line, the other end of the fifth side of the fourth special-shaped straight line is connected with the other end of the first side of the fourth special-shaped straight line, the fifth side of the fourth special-shaped straight line and the fourth side of the fourth special-shaped straight line form an alpha 7 angle, and the alpha 7 angle is the same as the alpha 3 angle;

the shape of the second-stage inner guide cylinder on the right single side surface of the axial section of the outer tube is a fifth special-shaped structure, and the fifth special-shaped structure comprises:

a fifth profiled straight line first edge;

The second edge of the fifth special-shaped line is perpendicular to the first edge of the fourth special-shaped line, and one end of the second edge of the fifth special-shaped line is connected with one end of the first edge of the fourth special-shaped line;

the third side of the fifth special-shaped line is parallel to the first side of the fifth special-shaped line, one end of the third side of the fifth special-shaped line is connected with the other end of the second side of the fifth special-shaped line, and the third side of the fifth special-shaped line and the first side of the fifth special-shaped line are on the same side of the second side of the fifth special-shaped line;

The fourth side of the fifth special-shaped line is flat with the third side of the fifth special-shaped line to form an alpha 8 angle, and the alpha 8 angle is the same as the alpha 6 angle;

one end of the fourth side of the fifth special-shaped line is connected with the other end of the third side of the fifth special-shaped line;

a fifth special-shaped straight line fifth side, wherein one end of the fifth special-shaped straight line fifth side is connected with the other end of the fifth special-shaped straight line fourth side, the fifth special-shaped straight line fifth side and the fifth special-shaped straight line fourth side form an alpha 9 angle, and the alpha 9 angle is the same as the alpha 3 angle;

A fifth special-shaped arc line sixth side, wherein one end of the fifth special-shaped arc line sixth side is connected with the other end of the fifth special-shaped straight line fifth side, and an arc-shaped bulge of the fifth special-shaped arc line sixth side faces the direction of the second side of the fifth special-shaped straight line, and a gap fifth special-shaped sealing step is formed between the first side of the fifth special-shaped straight line and the second side of the fifth special-shaped straight line;

The shape of the third-stage inner guide cylinder on the right single side surface of the axial section of the outer tube is a sixth special-shaped structure, and the sixth special-shaped structure comprises:

A sixth profiled straight line first edge;

The second edge of the sixth special-shaped straight line is connected with one end of the first edge of the sixth special-shaped straight line, and the second edge of the sixth special-shaped straight line is perpendicular to the first edge of the sixth special-shaped straight line;

The third side of the sixth special-shaped line is parallel to the first side of the sixth special-shaped line, one end of the third side of the sixth special-shaped line is connected with the other end of the second side of the sixth special-shaped line, and the third side of the sixth special-shaped line and the first side of the sixth special-shaped line are on the same side of the second side of the sixth special-shaped line;

The fourth side of the sixth special-shaped line forms an alpha 10 angle with the third side of the sixth special-shaped line, and the alpha 10 angle is the same as the alpha 1 angle;

One end of a fourth side of the sixth special-shaped line is connected with the other end of the third side of the sixth special-shaped line;

A fifth side of the sixth special-shaped arc line, wherein one end of the fifth side of the sixth special-shaped arc line is connected with the other end of the fourth side of the sixth special-shaped straight line, the other end of the fifth side of the sixth special-shaped arc line is connected with the other end of the first side of the sixth special-shaped straight line, and the arc-shaped bulge of the fifth side of the sixth special-shaped arc line faces the direction of the second side of the sixth special-shaped straight line, wherein a gap sixth special-shaped sealing step is formed between the first side of the sixth special-shaped straight line and the second side of the sixth special-shaped straight line;

The shape of the right single side surface of the axial section of the outer tube of the outer cylinder guide cylinder is a seventh special-shaped structure, and the seventh special-shaped structure comprises:

A seventh special-shaped straight line first side,

The second edge of the seventh special-shaped arc line, and one end of the second edge of the seventh special-shaped arc line is connected with one end of the first edge of the seventh special-shaped straight line;

One end of the third side of the seventh special-shaped straight line is connected with one end of the second side of the seventh special-shaped arc line, and the other end of the third side of the seventh special-shaped straight line is connected with the other end of the first side of the seventh special-shaped straight line, wherein the arc-shaped bulge of the second side of the seventh special-shaped arc line faces away from an included angle formed by the third side of the seventh special-shaped straight line and the first side of the seventh special-shaped straight line;

The shape of the right single side surface of the axial section of the outer tube of the inner circular guide cylinder is an eighth special-shaped structure, and the eighth special-shaped structure comprises:

An eighth profiled straight line first edge;

The second edge of the eighth special-shaped arc line, and one end of the second edge of the eighth special-shaped arc line is connected with one end of the first edge of the eighth special-shaped straight line;

An eighth special-shaped straight line third side;

One end of a third side of the eighth special-shaped straight line is connected with one end of a second side of the eighth special-shaped arc line, and the other end of the third side of the eighth special-shaped straight line is connected with the other end of the first side of the eighth special-shaped straight line, wherein the arc-shaped bulge of the second side of the eighth special-shaped arc line faces away from an included angle formed by the third side of the eighth special-shaped straight line and the first side of the eighth special-shaped straight line;

The included angle between the first edge of the seventh special-shaped straight line and the central axis of the outer tube, the included angle between the first edge of the eighth special-shaped straight line and the central axis of the outer tube, and the included angle between the second edge of the first special-shaped straight line and the central axis of the outer tube are all the same; the included angle between the third side of the seventh special-shaped line and the central axis of the outer tube, the included angle between the third side of the eighth special-shaped line and the central axis of the outer tube, and the included angle between the fourth side of the fourth special-shaped line and the central axis of the outer tube are all the same.

2. The downhole fluid unidirectional-conduction high-speed stop valve of claim 1, wherein the lower part of the central tube is further provided with a flywheel type stop ring, the flywheel type stop ring is fixed on the outer tube through a pin, the flywheel type stop ring is positioned at the upper part of the lower gland, and second liquid outlet holes are uniformly distributed on the flywheel type stop ring.

3. The downhole fluid unidirectional high-speed stop valve of claim 1, wherein the first profiled straight line first edge is in sealing connection with the upper gland through a first profiled sealing step, and a sealing material is filled in a gap between the first profiled sealing step and the upper gland; the third side of the first special-shaped straight line is in sealing connection with the first side of the second special-shaped straight line through a second special-shaped sealing step, and a gap between the second special-shaped sealing step and the third side of the first special-shaped straight line is filled with sealing materials; the fifth edge of the second special-shaped straight line is in sealing connection with the first edge of the third special-shaped straight line through a third special-shaped sealing step, and a gap between the third special-shaped sealing step and the fifth edge of the second special-shaped straight line is filled with sealing materials; one end of the first edge of the fourth special-shaped straight line is contacted with the limit step of the inner guide cylinder, the third edge of the fourth special-shaped straight line is connected with the first edge of the fifth special-shaped straight line through a fifth special-shaped sealing step, and a gap between the fifth special-shaped sealing step and the third edge of the fourth special-shaped straight line is filled with sealing materials; the third edge of the fifth special-shaped straight line is in sealing connection with the first edge of the sixth special-shaped straight line through a sixth special-shaped sealing step, and a gap between the sixth special-shaped sealing step and the third edge of the fifth special-shaped straight line is filled with sealing materials; the first irregular straight line second side, the second irregular straight line fourth side, the third irregular straight line fourth side, the fourth irregular straight line fifth side, the fifth irregular straight line fifth side and the sixth irregular straight line fourth side are all parallel to each other, the second irregular straight line third side, the third irregular straight line third side, the fourth irregular straight line fourth side and the fifth irregular straight line fourth side are all parallel to each other, the radians of the second irregular arc line second side, the third irregular arc line second side, the fifth irregular arc line sixth side, the sixth irregular arc line fifth side, the seventh irregular arc line second side and the eighth irregular arc line second side are the same, the intersection of the seventh irregular straight line first side and the seventh irregular straight line second side of the outer circular guide cylinder with the seventh irregular straight line is provided with an outer circular guide cylinder first positioning claw, the first positioning claws of the outer circular guide cylinder are distributed in an annular array relative to the center of the outer circular guide cylinder on the radial section of the outer tube, the second positioning claws of the outer circular guide cylinder are arranged at the intersections of the seventh special-shaped straight third side and the seventh special-shaped arc line second side of the outer circular guide cylinder in an annular array relative to the center of the outer circular guide cylinder on the radial section of the outer tube, the first positioning claws of the inner circular guide cylinder are arranged at the intersections of the eighth special-shaped straight first side and the eighth special-shaped straight second side of the inner circular guide cylinder in an annular structure, the first positioning claws of the inner circular guide cylinder are distributed in an annular array relative to the center of the inner circular guide cylinder on the radial section of the outer tube, the second positioning claws of the inner circular guide cylinder are arranged at the intersections of the eighth special-shaped straight third side and the eighth special-shaped arc line second side of the inner circular guide cylinder in an annular structure, the second positioning claws of the inner guide cylinder are distributed in an annular array relative to the center of the inner guide cylinder on the radial section of the outer tube, and the lengths of the first positioning claws of the outer guide cylinder, the second positioning claws of the outer guide cylinder, the first positioning claws of the inner guide cylinder and the second positioning claws of the inner guide cylinder are the same as the width of the interval gap between the inner guide cylinder and the outer guide cylinder.

4. The downhole fluid unidirectional-conduction high-speed stop valve according to claim 1, wherein the first-stage outer guide cylinder, the second-stage outer guide cylinder and the third-stage outer guide cylinder are sequentially sleeved and embedded relative to the central pipe from bottom to top at the position where the outer pipe is attached in the accommodating space, the first-stage inner guide cylinder, the second-stage inner guide cylinder and the third-stage inner guide cylinder are sequentially sleeved and embedded on the central pipe in the accommodating space from bottom to top, and the outer guide cylinder and the inner guide cylinder are also reversely and inversely installed in the outer pipe.

5. A method of using the downhole fluid one-way high-speed shut-off valve of any one of claims 1-4, the method comprising:

S1, connecting a central pipe to a process pipe column of a water injection well, and putting the central pipe into a water injection layer, wherein ground injection water enters a liquid outlet hole of the central pipe through the process pipe column;

S2, the injected fluid flows through a continuous structure channel formed by filling the inner guide cylinder, the outer guide cylinder, the inner guide cylinder and the outer guide cylinder in the outer tube, enters the second liquid outlet hole of the flywheel type stop ring and the third liquid outlet hole of the outer tube, and is injected into the stratum.