CN107939350B - Selective inflow controller and completion string incorporating same - Google Patents
Selective inflow controller and completion string incorporating same Download PDFInfo
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- CN107939350B CN107939350B CN201610890102.4A CN201610890102A CN107939350B CN 107939350 B CN107939350 B CN 107939350B CN 201610890102 A CN201610890102 A CN 201610890102A CN 107939350 B CN107939350 B CN 107939350B
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- 238000000429 assembly Methods 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 29
- 230000001133 acceleration Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003129 oil well Substances 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 206010020852 Hypertonia Diseases 0.000 abstract description 2
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- 230000008878 coupling Effects 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/006—Accessories for drilling pipes, e.g. cleaners
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
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- Fluid Mechanics (AREA)
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Abstract
The invention provides a selective inflow controller and a completion string comprising the same, wherein the selective inflow controller comprises: a cassette-type controller main body having an inlet on a sidewall thereof; a flow guide channel which is arranged in the inner cavity of the controller main body and is communicated with the inlet, a flow distribution channel which is communicated with the flow guide channel, an accelerated jet flow channel which is communicated with the flow guide channel, and an outflow channel which is communicated with both the flow distribution channel and the accelerated jet flow channel; the setting is in controller main part and with the export that the passageway communicates of effluenting, wherein, the import setting of reposition of redundant personnel passageway is between the import of entry and acceleration jet flow passageway to the junction of acceleration jet flow passageway and water conservancy diversion passageway compares that reposition of redundant personnel passageway and water conservancy diversion passageway's junction is more gentle, uses this controller can effectively prevent because of the bottom water that "heel end effect" or "local hypertonicity" lead to from suddenly advancing, is favorable to keeping the equilibrium of pit shaft inflow section, and the anhydrous oil recovery period of extension improves oil well output.
Description
Technical Field
The present invention relates to reservoir completion operations, and more particularly to a selective inflow controller and completion string incorporating the same.
Background
In a bottom water reservoir horizontal well, the problems of bottom water coning caused by a heel-end effect and reservoir local hypertonicity commonly exist. After the bottom water coning of the horizontal well occurs, the water content is rapidly increased, the yield is remarkably reduced, and the productivity of the oil well is greatly influenced. In order to solve the problem of bottom water coning, the inflow profile of the produced fluids of the stratum along the shaft must be balanced, and the inflow rate of the shaft at the heel end and a high-permeability zone is limited.
The main modes adopted by the existing water control well completion comprise variable-pitch segmented perforation well completion, segmented variable-density perforation well completion, central tube well completion, double-tube well completion and the like. The effective regulation and control time of the water control well completion modes is short, the later-stage parameter regulation is difficult, the initial-stage effect is good generally, but the effect is gradually poor along with the progress of production development, and the capability of balancing production profiles is limited.
In the early 90 s of the last century, the earliest development of a wellbore Inflow Controller (ICD), a device developed by NorskHydro corporation of norwegian and successfully applied to Troll oil fields in 1998. Until now, different types of ICDs have been developed in succession at home and abroad. The ICD in the early stage simply limits the local stratum fluid production speed of a shaft, does not distinguish an oil phase from a water phase, belongs to general and passive water control, and immediately fails after the oil well breaks into water; the self-adaptive well inflow controller (AICD) is a novel ICD developed on the basis of an ICD technology, has fluid identification capacity, and can automatically adjust the flow resistance generated by the self according to the change of the fluid property, composition and flow, thereby effectively balancing the well inflow section, preventing the bottom water coning phenomenon from occurring and ensuring the long-term stable production of a horizontal well. However, the existing AICD still has the problems of low fluid identification precision, unstable performance, complex structure, high processing difficulty and the like.
Disclosure of Invention
In view of some or all of the above-described technical problems in the prior art, the present invention provides a selective inflow controller and a completion string including the same. The selective inflow controller can selectively control formation fluid, and when the flow rate of the formation fluid is larger or the water content of the formation fluid is higher, the formation fluid mainly flows along the accelerated jet flow channel of the selective inflow controller, and the flow resistance is larger; when the flow rate of the formation fluid is low or the water content is low, the formation fluid mainly flows along the diversion channel selectively flowing into the controller, and the flow resistance is low. The controller can effectively prevent bottom water from entering due to heel-end effect or local high permeability, is favorable for keeping balance of inflow section of a shaft, prolongs the period of anhydrous oil extraction and improves the yield of an oil well.
According to an aspect of the present invention, there is provided a selective inflow controller including:
a cassette-type controller main body having an inlet on a side wall thereof,
a flow guide channel which is arranged in the inner cavity of the controller main body and is communicated with the inlet, a flow distribution channel which is communicated with the flow guide channel, an accelerated jet flow channel which is communicated with the flow guide channel, and an outflow channel which is communicated with both the flow distribution channel and the accelerated jet flow channel,
an outlet disposed on the controller body and communicating with the outflow passage,
wherein the inlet of the diversion channel is arranged between the inlet and the inlet of the acceleration jet channel, and the joint of the acceleration jet channel and the flow guide channel is more gradual than the joint of the diversion channel and the flow guide channel.
In one embodiment, a plurality of sets of guide block assemblies are arranged in an inner cavity of the controller body, each guide block assembly comprises a first guide block, a second guide block and a third guide block which are arranged at intervals in sequence, a first radial baffle is arranged at the downstream end of each first guide block, a second radial baffle is arranged at the upstream end of each third guide block, wherein the outer side wall of each first guide block, the outer side wall of each second guide block and the outer side wall of each third guide block are located on the same spiral line in the upstream-downstream direction, a guide channel is formed by the first guide blocks, the second guide blocks and the side walls of the controller body, a diversion channel is formed by the first radial baffles, the second guide blocks and the second radial baffles, and an accelerating jet channel is formed by the third guide blocks, another adjacent set of first guide blocks and the first radial baffles above the first guide blocks.
In one embodiment, a constriction is provided on the accelerating jet channel.
In one embodiment, a tangent line at the apex of the downstream end of the third deflector block forms an angle of 30-60 degrees with the radial direction.
In one embodiment, a swirl block assembly is arranged on the inner side of the flow guide block assembly, the swirl block assembly comprises fan-shaped swirl blocks and circumferential baffles arranged between the adjacent swirl blocks, a plurality of swirl blocks are arranged at intervals in the circumferential direction, each swirl block is positioned at a corresponding position between a first radial baffle and a second radial baffle of the other adjacent group of flow guide block assemblies, and an outflow channel is formed by the adjacent swirl blocks and the circumferential baffles arranged between the swirl blocks.
In one embodiment, the inlet is provided in a tangential direction of the controller body, and the inlet has a rectangular cross section.
In one embodiment, four inlets and guide block assemblies matched with the inlets are arranged on the controller main body, and the inlets and the guide block assemblies are rotationally symmetrical.
According to another aspect of the present invention, there is provided a completion string comprising:
a base pipe, wherein the base pipe is provided with a mounting groove,
a controller according to any of claims 1 to 7, the controller being disposed at the mounting slot and the outlet of the controller being in communication with the interior chamber of the base pipe,
the protection barrel is sleeved on the outer side of the base pipe, an annular cavity is formed by the protection barrel and the base pipe, and the controller is located in the annular cavity.
In one embodiment, a plurality of first strips extending along the axial direction are arranged on the outer wall of the base pipe at the annular cavity, the first strips arranged at intervals in the circumferential direction form axial diversion grooves, and the first strips arranged at intervals at the upper end and the lower end of the installation groove form circumferential diversion grooves.
In one embodiment, a second bar of shorter length is provided between the first bars above the mounting groove, the second bar extending in the axial direction.
Compared with the prior art, the selective inflow controller has the advantages that the selective inflow controller can selectively control the formation fluid, when the flow rate of the formation fluid is larger or the water content of the formation fluid is higher, the formation fluid mainly flows along the accelerated jet flow channel of the selective inflow controller, and the flow resistance is larger; when the flow rate of the formation fluid is low or the water content is low, the formation fluid mainly flows along the diversion channel selectively flowing into the controller, and the flow resistance is low. The controller can effectively prevent bottom water from entering due to heel-end effect or local high permeability, is favorable for keeping balance of inflow section of a shaft, prolongs the period of anhydrous oil extraction and improves the yield of an oil well.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 illustrates a selective inflow controller according to one embodiment of the present invention;
FIG. 2 shows a cover plate according to an embodiment of the invention;
FIG. 3 illustrates a completion string according to an embodiment of the present invention;
FIG. 4 shows a protective cartridge according to one embodiment of the invention;
in the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
FIG. 1 illustrates a selective inflow controller according to the present invention. As shown in fig. 1, the controller includes a controller body 10 and a cover plate 21, the controller body 10 is configured as a rotational symmetric bar-block-shaped protrusion structure, and the cover plate 21 is sealingly disposed at an opening of the controller body 10 to form a sealed controller inner cavity. An inlet 11 is provided on a side wall of the controller body 10 for introducing a fluid. A deflector block assembly 50 is provided on the bottom surface of the controller main body 10. The guide block assembly 50 has a first guide block 18, a second guide block 181, and a third guide block 182. A first radial deflector 20 is provided at the downstream end of the first deflector block 18. The second radial liquid baffle 22 is arranged at the upstream end of the third guide block 182 and the third guide block 182.
Wherein, a plurality of groups of guide block assemblies 50 are arranged on the circumference of the controller main body 10 to enhance the oil-water recognition capability of the controller. For example, four sets of the guide block assemblies 50 may be disposed in the circumferential direction of the controller main body 10, and the guide block assemblies 50 are disposed in a rotational symmetry manner. Correspondingly, four inlets 11 are provided on the circumferential side wall of the controller body 10. The inlets 11 are also rotationally symmetrical.
In the upstream to downstream direction, the outer side walls of the first flow guide block 18, the second flow guide block 181 and the third flow guide block 182 are located on the same spiral line. In the circumferential direction, the first guide block 18, the second guide block 181, and the third guide block 182 are arranged at intervals. The outer side wall and the inner side wall of the first guide block 18 are both cambered surfaces, and the cross section of the first guide block 18 gradually increases in the upstream-downstream direction. Meanwhile, the outer side wall and the inner side wall of the second guide block 181 are both arc surfaces, and the cross section of the second guide block 181 is gradually increased in the direction from the upstream to the downstream. Both the outer side wall and the inner side wall of the third guide block 182 are curved surfaces, and the outer side wall of the third guide block 182 gradually shrinks inward in the upstream to downstream direction. Thus, the first deflector block 18 and the sidewall of the controller body 10 form the deflector channel 12, and the deflector channel 12 is a variable sized tubular structure. The first radial baffle 20, the second flow guide block 181 and the second radial baffle 22 form a diversion channel 13, the diversion channel 13 is substantially in a fan-shaped structure and is substantially perpendicular to the diversion channel 12, and when the flow rate of the formation fluid is low or the water content of the formation fluid is low, the formation fluid mainly flows out along the diversion channel 13. The third flow guiding block 182, the adjacent other group of first flow guiding blocks 18 and the first radial baffle 20 above the first flow guiding block 18 form an accelerating jet flow channel 14, the accelerating jet flow channel 14 is in a direction-changing tubular structure, the communication with the flow guiding channel 12 is smoother than the communication between the diversion channel 13 and the flow guiding channel 12, and when the flow rate of the formation fluid is larger or the water content is higher, the formation fluid mainly flows along the accelerating jet flow channel 14 selectively flowing into the controller so as to generate rotational flow in the inner cavity of the controller.
A swirl block assembly 60 is provided inside the deflector block assembly 50. The swirl block assembly 60 has 4 symmetrical swirl blocks 19 and a circumferential baffle 201 disposed between adjacent swirl blocks 19. The swirl block 19 has a fan-shaped structure, which is centrally symmetrical with respect to the controller main body 10. The circumferential baffle 201 is an arc-shaped plate. The plurality of swirl blocks 19 are circumferentially spaced and each swirl block 19 is located at a corresponding position between the first radial baffle 20 and the second radial baffle 22 of the adjacent guide block assembly 50 of the other group. That is, one end face 61 of the swirl block 19 of the sector is collinear with the first radial baffle 20, and the other end face 62 of the swirl block 19 is collinear with the second radial baffle 22 of the adjacent other set of guide block assemblies 50. Thus, on the one hand, the swirl block 19 reduces the space between the deflector assembly 50 and the outlet 11, defines the swirl path of the fluid, and improves the flow splitting capability of the controller; on the other hand, the swirl block 19 and the circumferential baffle 201 form a radial outflow channel 15. The outflow channel 15 communicates with both the flow splitting channel 13 and the accelerating jet channel 14 to deliver fluid therethrough to the outlet 16.
A constriction 141 is provided on the accelerating jet passage 14 for increasing the flow velocity of the fluid passing through the accelerating jet passage 14 to improve the swirling capability of the fluid.
The tangent line at the apex of the downstream end of the third deflector block 182 forms an angle of 30-60 degrees with the radial direction. For example, the tangent of the downstream end of the third deflector block 182 forms an angle of 45 degrees with the radial direction. By this arrangement, on the one hand, the flow velocity of the fluid through the acceleration jet channel 14 is ensured. On the other hand, the swirl angle and the swirl capacity of the fluid are ensured.
Preferably, the inlet 11 is disposed in a tangential direction of the controller body 10, and the inlet 11 has a rectangular cross section. The outlet 16 is provided at the center of the controller body 10, and an outlet nozzle 161 is provided at the outlet 16, the outlet nozzle 161 being a circular tube.
During use of the controller, formation fluid can enter the diversion channel 13 and the accelerated jet channel 14 through the inlet 11 via the diversion channel 12, and formation fluid can enter the outflow channel 15 and exit the outlet 16 after passing through the diversion channel 13 and the accelerated jet channel 14.
That is, the controller includes two flow paths in total. The first path is a direct current path and consists of an inlet 11, a flow guide channel 12, a flow dividing channel 13, an outflow channel 15 and an outlet 16, and the resistance of the first path mainly comes from local head loss. The second path is a rotational flow path and consists of an inlet 11, a flow guide channel 12, an accelerated jet flow channel 14, an outflow channel 15 and an outlet nozzle 16, and the resistance of the second path mainly comes from the head loss along the way. Formation fluids may flow out of the outlet 16 along different flow paths with different restriction.
Therefore, the controller can distinguish formation fluids (oil and water) according to the physical property difference (density and viscosity) and the flowing property of the formation fluids, automatically adjust the flow distribution proportion of the two flow paths, limit the formation fluids with larger inflow rate and high water content, and achieve the effect of self-adaptive oil stabilization and water control.
Specifically, when the formation fluid entering the selective inflow controller has a low viscosity and a high density (high water content), the fluid can enter the outlet 16 through two flow paths, but the resistance of the flow path to the formation fluid is greater than the resistance of the flow path to the formation fluid, so that the flow rate entering the outlet 16 along the flow path two is greater, the fluid enters the acceleration jet flow channel 14 from the flow guide channel 12, enters the inner side of the flow guide block assembly 50 along the tangential direction at a high speed after turning through the reducing port 141 of the acceleration jet flow channel 14, the flow rate is gradually reduced after the fluid performs the centripetal swirling motion, and finally flows to the outlet 16 through the outflow channel 15, the faster the flow rate of the fluid is, the longer the swirling time is, the longer the flow path of the fluid is, and the generated resistance is greater; when the formation fluid entering the selective inflow controller has a relatively high viscosity and a relatively low density (low water content), the fluid can enter the outlet 16 through two flow paths, but the resistance of the flow paths to the formation fluid is greater than the resistance of the flow paths to the formation fluid, so that the flow rate of the formation fluid entering the outlet 16 along the flow path one is relatively high, the fluid enters the diversion channel 13 from the diversion channel 12, directly enters the outflow channel 15 along the diversion channel 13, and finally flows to the outlet 16 through the outflow channel 15, in this case, the flow path of the fluid is relatively short, and the generated resistance is relatively low.
A completion string 200 is also provided in accordance with the present invention as shown in fig. 3. The completion string 200 includes the controller described above. In particular, the completion string 200 comprises a base pipe 2, on which base pipe 2 a mounting groove 4 is provided for mounting a controller. The center of the installation groove 4 is provided with an aperture 41 corresponding to the selective inflow controller outlet 16. After the controller is embedded in the installation groove 4, the outlet 16 is communicated with the inner cavity of the base pipe 2 through the hole 41, so that formation fluid can enter the base pipe 2 from the hole 41 after passing through the outlet 16 of the controller.
The outer side of the base pipe 2 is sleeved with a protective cylinder 7 to form an annular cavity 53. A plurality of axially extending first bars 54 are provided on the outer wall of the base pipe 2 within the annular chamber 53. The first blocks 54 arranged at intervals in the circumferential direction form axial guide grooves 5. And first blocks 54 are provided at upper and lower ends of the installation groove 4 at intervals to form the circumferential guide grooves 51. The circumferential guide grooves 51 and the axial guide grooves 5 communicate with each other. The axial channels 5 guide formation fluid axially into the inlet 11 of the controller and the circumferential channels 51 guide formation fluid circumferentially into the inlet 11 of the controller.
The upper end of base pipe 2 is equipped with the internal thread, and the lower extreme is equipped with external screw thread 1 for be connected with other accuse water well completion tubular columns. The middle part is provided with a sealing external thread 3 which is used for being connected with the lower end of the outer protection barrel 7 in a sealing way.
The upper end of completion string 200 may be coupled to a fine composite sand screen (not shown) by a collar (not shown). As shown in fig. 4, the upper end of the protection cylinder 7 is provided with a sealing ring mounting groove 9 for mounting a sealing ring and being in sealing connection with a coupling. The lower end of the protective cylinder 7 is provided with a sealing internal thread 8 for sealing connection with the base pipe 2.
A plurality of controllers are provided in the circumferential direction of the base pipe 2, and a first bar 54 is provided on both sides of each controller. In order to adjust the flow guiding capacity of the axial flow guiding groove 5, a second strip 55 of a shorter length is provided between the first strips 54 located above the mounting groove 4. The second bar 55 extends in the axial direction. The flow guiding capacity of the axial guide grooves 5 can be further improved by this arrangement.
During operation of the completion string 200, formation fluid flows through the screen of the fine composite sand screen, then through the collar into the inner chamber 53, then flows along the axial diversion trench 5 to the controller, enters the controller through the inlet 11, and enters the base pipe 2 through the outlet 16 of the controller through the perforations 41. Formation fluid which does not enter the controller along the axial diversion trench 5 enters other controllers along the circumferential diversion trench 51 and enters the controllers from the inlets 11 of the controllers.
In this application, the orientations are used for "up" and "down" with reference to the orientation shown in fig. 1.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A selective inflow controller, comprising:
a cassette-type controller main body having an inlet on a side wall thereof,
a flow guide channel which is arranged in the inner cavity of the controller main body and is communicated with the inlet, a flow distribution channel which is communicated with the flow guide channel, an accelerating jet flow channel which is communicated with the flow guide channel, and an outflow channel which is communicated with the flow distribution channel and the accelerating jet flow channel,
an outlet provided on the controller body and communicating with the outflow passage,
wherein an inlet of the flow dividing channel is disposed between the inlet and an inlet of the accelerating jet channel, and a junction of the accelerating jet channel and the flow guide channel is more gradual than a junction of the flow dividing channel and the flow guide channel,
a plurality of groups of guide block assemblies are arranged in the inner cavity of the controller main body, the guide block assemblies comprise a first guide block, a second guide block and a third guide block which are arranged in sequence at intervals, a first radial baffle is arranged at the downstream end of the first guide block, a second radial baffle is arranged at the upstream end of the third guide block, wherein, in the upstream to downstream direction, the outer side wall of the first guide block, the outer side wall of the second guide block and the outer side wall of the third guide block are positioned on the same spiral line, the guide passage is formed by the first guide block, the second guide block and the side wall of the controller body, the flow dividing channel is formed by the first radial baffle, the second deflector block and the second radial baffle, the accelerating jet channel is formed by the third deflector block, the first deflector block of the other adjacent group and the first radial baffle above the first deflector block.
2. A control as claimed in claim 1, wherein a constriction is provided in the accelerating jet passage.
3. The controller of claim 1, wherein a tangent at a vertex of a downstream end of the third deflector block forms an angle of 30-60 degrees with a radial direction.
4. The controller according to claim 1, wherein a swirl block assembly is arranged inside the flow guide block assembly, the swirl block assembly comprises fan-shaped swirl blocks and circumferential baffles arranged between the adjacent swirl blocks, the swirl blocks are arranged at intervals in the circumferential direction and are located at corresponding positions between the first radial baffle and the second radial baffle of the other adjacent group of flow guide block assemblies, and the outflow channel is formed by the adjacent swirl blocks and the circumferential baffles arranged between the swirl blocks.
5. The controller of claim 1, wherein the inlet is disposed in a tangential direction of the controller body, and a cross-section of the inlet is rectangular.
6. The controller of claim 1, wherein four inlets and the flow guide block assemblies matched with the inlets are provided on the controller body, and the inlets and the flow guide block assemblies are rotationally symmetrical.
7. A completion string, comprising:
a base pipe, wherein the base pipe is provided with a mounting groove,
the controller of any of claims 1-6, disposed at the mounting slot, and the outlet of the controller is in communication with an interior cavity of the base pipe,
the protective cylinder is sleeved on the outer side of the base pipe, and the protective cylinder and the base pipe form an annular cavity.
8. A completion string according to claim 7, wherein a plurality of axially extending first bars are provided on the outer wall of the base pipe at the annulus, the first bars being circumferentially spaced to form axial channels, and the first bars being circumferentially spaced at both upper and lower ends of the installation groove to form circumferential channels.
9. A completion string according to claim 8, wherein a second bar of shorter length is provided between the first bars above the installation groove, the second bar extending in the axial direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610890102.4A CN107939350B (en) | 2016-10-12 | 2016-10-12 | Selective inflow controller and completion string incorporating same |
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| CN201610890102.4A CN107939350B (en) | 2016-10-12 | 2016-10-12 | Selective inflow controller and completion string incorporating same |
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| CN107939350B true CN107939350B (en) | 2020-03-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111119804A (en) * | 2018-10-31 | 2020-05-08 | 中国石油化工股份有限公司 | Fluid inflow control device |
| CN109779578A (en) * | 2019-03-26 | 2019-05-21 | 西安石油大学 | Adaptive horizontal well water control tool based on oil-water density difference and swirl |
| CN111980660A (en) * | 2020-08-24 | 2020-11-24 | 西南石油大学 | Oil-water automatic separation inflow controller |
| CN114109325B (en) * | 2021-11-22 | 2023-05-16 | 西南石油大学 | Gas well gas-increasing and gas-lifting speed-increasing and water atomization device |
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| CN103806881A (en) * | 2014-02-19 | 2014-05-21 | 东北石油大学 | Branched flow channel type self-adaptation inflow control device |
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| CN105089580A (en) * | 2014-05-12 | 2015-11-25 | 中国石油化工股份有限公司 | Self-adapting water control device for oil production system and oil production system |
| CN104389553A (en) * | 2014-09-26 | 2015-03-04 | 西南石油大学 | Automatic phase selection control valve |
| CN105756628A (en) * | 2014-12-18 | 2016-07-13 | 思达斯易能源技术(集团)有限公司 | Water controlling current limiting device |
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