CN113338919B - Blocking tubular column - Google Patents
Blocking tubular column Download PDFInfo
- Publication number
- CN113338919B CN113338919B CN202110661993.7A CN202110661993A CN113338919B CN 113338919 B CN113338919 B CN 113338919B CN 202110661993 A CN202110661993 A CN 202110661993A CN 113338919 B CN113338919 B CN 113338919B
- Authority
- CN
- China
- Prior art keywords
- pressure
- pipe
- packer
- movable
- movable pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000000903 blocking effect Effects 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 11
- 238000010008 shearing Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
Classifications
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
The invention relates to a blocking tubular column. The blocking tubular column comprises a plug, a first packer, a second packer, a screen pipe and a pressure compensator, wherein the pressure compensator is connected between the plug and the second packer in series; the pressure compensator comprises an outer cylinder, a movable pipe and a spring, wherein a pressure compensation cavity is formed by the movable pipe and the outer cylinder in a surrounding mode, a pressure compensation hole is formed in the outer cylinder, and the pressure compensation hole is communicated with the lower portion of the pressure compensation cavity; the movable pipe is provided with an inner pressure bearing surface and an outer pressure bearing surface, when the first packer and the second packer are unpacked, the pipe column is lifted, the pressure below the second packer is reduced, the pressure in the pressure compensation cavity is reduced, when the liquid pressure in the blocking pipe column is larger than the liquid pressure in the pressure compensation cavity, the movable pipe moves downwards under the acting force born by the inner pressure bearing surface, and the liquid in the pressure compensation cavity is discharged into the sealing ring control at the lower part of the second packer, so that the vacuum effect below the second packer is reduced, the acting force required by unpacking is reduced, and the unpacking is more convenient.
Description
Technical Field
The invention relates to a blocking tubular column.
Background
The multi-oil-layer exploitation can effectively improve the productivity of an oil well, but the oil layer needs to be effectively identified and cleared in the exploitation process, and targeted exploitation measures are formulated. At present, a double-blocking pipe column is generally adopted to test an oil layer, the double-blocking pipe column comprises a plug, a second packer, a screen pipe and a first packer which are arranged from bottom to top, the pipe column utilizes a double-stage packer to block the upper side and the lower side of a target interval, the influence of other oil layers is avoided, and the production is accurate. However, the following problems exist in the field construction of such a pipe string: after the plugging test of the lowest oil layer is completed, the lowest packer needs to be unsealed, and as a sealing cavity is formed on the lower side of the lowest packer, the vacuum effect is serious in the lifting and unsealing process of the pipe column, so that the unsealing load of the pipe column is large, and even the unsealing fails.
Disclosure of Invention
The invention aims to provide a blocking tubular column convenient to unseal.
The blocking pipe column adopts the following technical scheme:
A stuck tubular string comprising:
the plug is used for plugging the bottom of the pipe column;
The first packer is positioned on the upper side of the plugging head and is used for being set in the casing;
The second packer is positioned on the upper side of the plugging head and on the lower side of the first packer, and is matched with the first packer to seal the upper side and the lower side of the target interval;
the screen pipe is positioned between the first packer and the second packer and is communicated with an upper oil pipe of the pipe column;
The pressure compensator is connected in series between the plug and the second packer; the pressure compensator includes:
An outer cylinder;
The movable pipe is arranged in the outer cylinder in a sliding sealing manner, a pressure compensation cavity which is separated from the inner cavity of the sieve tube is formed by the movable pipe and the outer cylinder in a surrounding manner, a pressure compensation hole which is communicated with the pressure compensation cavity and the outside of the pressure compensator is formed in the outer cylinder, and the pressure compensation hole is communicated with the lower part of the pressure compensation cavity;
a spring for applying an upward elastic force to the movable tube;
The movable pipe is provided with an inner side pressure bearing surface, and the inner side pressure bearing surface applies downward acting force to the movable pipe under the pressure of liquid in the blocking pipe column;
the movable pipe is also provided with an outer bearing surface for forming a part of the inner wall surface of the pressure compensation cavity, and the outer bearing surface applies upward acting force to the movable pipe under the pressure of liquid in the pressure compensation cavity;
when the liquid pressure in the blocking pipe column is larger than the liquid pressure in the pressure compensation cavity, the movable pipe moves downwards under the acting force received by the inner pressure bearing surface.
The beneficial effects are that: the blocking pipe column is provided with the pressure compensator, when the first packer and the second packer are deblocked, the pipe column is lifted, the pressure below the second packer is reduced, the pressure in the pressure compensation cavity is reduced, when the pressure of liquid in the blocking pipe column is higher than the pressure of liquid in the pressure compensation cavity, the movable pipe moves downwards under the acting force born by the inner bearing surface, and the liquid in the pressure compensation cavity is discharged into the sealing ring control at the lower part of the second packer, so that the vacuum effect below the second packer is reduced, the acting force required by deblocking is reduced, and the deblocking is more convenient.
Further, the movable pipe comprises a pipe body and an annular bulge arranged at the upper end of the pipe body, the upper end of the movable pipe is in sliding sealing fit with the outer cylinder through the annular bulge, the outer bearing surface of the movable pipe is L-shaped, and the outer bearing surface comprises a lower side surface of the annular bulge and a vertical section positioned at the lower side of the annular bulge on the outer peripheral surface of the pipe body. The movable pipe has a simple structure and is convenient to process.
Further, the inner pressure bearing surface of the movable pipe comprises a pipe body inner wall surface, a pipe body upper end surface, a pipe body lower end surface and an annular bulge upper side surface. The upper side surface of the annular bulge faces upwards, and a large acting force can be applied to the movable pipe downwards.
Further, the upper end of the spring is in pressing fit with the lower side face of the annular protrusion. The spring is convenient to install.
Further, the outer cylinder comprises a cylinder body and an upper connector, the cylinder body and the upper connector are arranged in a split mode, the upper connector stretches into the cylinder body, and the upper connector is used for being matched with the upper stop and the lower stop of the movable pipe so as to limit the upper limit position of the movable pipe. The movable pipe is convenient to install, and the movable pipe is prevented from falling off.
Further, the outer cylinder comprises a cylinder body and a lower joint, the cylinder body and the lower joint are arranged in a split mode, the lower joint is fixed at the lower end of the cylinder body and stretches into the cylinder body, and the lower end of the movable pipe stretches into the lower joint and is matched with the lower joint in an up-and-down guiding sliding sealing mode. Compact structure and good stability of the movable pipe.
Further, the outer cylinder comprises an upper connector fixed with the upper end of the cylinder body, the upper connector stretches into the cylinder body, and the upper connector is used for being matched with the movable pipe in an up-and-down blocking mode so as to limit the upper limit position of the movable pipe. The movable pipe is convenient to install, and the movable pipe is prevented from falling off.
Further, the upper end face of the lower connector is in pressing fit with the spring. The spring is convenient to install.
Further, the spring is located in the pressure compensation chamber. The spring has a more compact and stable structure in the pressure compensation cavity.
Further, a stress shearing part is arranged between the movable pipe and the outer cylinder, and a movable pipe upward moving space for enabling the movable pipe to move upward relative to the outer cylinder to increase the volume of the pressure compensation cavity after the stress shearing part is sheared by pressure increase in the pressure compensation cavity is arranged above the movable pipe. When the pressure is too high, the stressed shearing piece is sheared, and the movable pipe can move upwards at the moment, so that the volume of the pressure compensation cavity is increased, the pressure of the space below the second packer is reduced, and the setting is facilitated.
Drawings
FIG. 1 is a schematic view of the use state of the embodiment 1 of the blocking pipe column of the present invention;
FIG. 2 is a schematic diagram of a pressure compensator in embodiment 1 of a plugging string according to the present invention;
FIG. 3 is a schematic view of a pressure compensator in embodiment 2 of the blocking pipe column according to the present invention;
In the figure: 1. a plug; 2. a first packer; 3. a second packer; 4. a screen pipe; 5. an upper oil pipe; 6. a pressure compensator; 61. an outer cylinder; 611. a cylinder; 612. an upper joint; 613. a lower joint; 62. a movable tube; 621. a tube body; 622. an annular protrusion; 623. a lateral pressure-bearing surface; 624. an inner pressure-bearing surface; 63. a pressure compensation chamber; 64. a pressure compensating hole; 7. a spring; 8. a forced shearing piece; 9. an oil jacket annulus; 10. the movable tube moves up the space.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The terms "upper," "lower," "front," "rear," "left," "right," and the like refer to an orientation or positional relationship as if it were assumed, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
The features and capabilities of the present invention are described in further detail below in connection with the examples.
Specific example 1 of the blocking tubular column:
As shown in fig. 1 and fig. 2, the plugging tubular column comprises a plug 1 for plugging the bottom of the tubular column, a first packer 2 arranged on the upper side of the plug 1 and used for being set in a casing, and a second packer 3 arranged on the lower side of the first packer 2, wherein in the embodiment, the plug 1 is a plug. The second packer 3 is matched with the first packer 2 to clamp the upper side and the lower side of the target interval. The plugging string further comprises a screen 4 between the first packer 2 and the second packer 3, the screen 4 being in communication with the upper tubing 5 of the string. A pressure compensator 6 is connected in series between the plug 1 and the second packer 3. In this embodiment, the first packer 2 is a Y111 packer, and the second packer 3 is a Y211 packer.
The pressure compensator 6 comprises an outer cylinder 61 and a movable pipe 62, the movable pipe 62 is arranged in the outer cylinder 61 in a sliding sealing way, a pressure compensating cavity 63 which is separated from the inner cavity of the screen pipe 4 is formed by the movable pipe 62 and the outer cylinder 61 in a surrounding way, a pressure compensating hole 64 which is communicated with the pressure compensating cavity 63 and the outside of the pressure compensator 6 is formed in the outer cylinder 61, and the pressure compensating hole 64 is communicated with the lower part of the pressure compensating cavity 63. A spring 7 is provided in the pressure compensating chamber 63, and the spring 7 is used to apply an upward elastic force to the movable tube 62.
The movable pipe 62 has an inner pressure-bearing surface and an outer pressure-bearing surface, the inner pressure-bearing surface exerting a downward force on the movable pipe 62 under the pressure of the liquid in the blocking pipe column; the outer pressure-bearing surface is used to form part of the inner wall surface of the pressure compensating chamber, and exerts an upward force on the movable tube 62 under the pressure of the liquid in the pressure compensating chamber 63. When the liquid pressure in the blocking pipe column is higher than the liquid pressure in the pressure compensation cavity 63, the movable pipe 62 is subjected to downward acting force on the inner bearing surface, and moves downward against the elastic force of the spring 7 and the upward acting force on the outer bearing surface.
When the first packer 2 and the second packer 3 are deblocked, after the pipe column is lifted, the pressure in the oil jacket annulus 9 below the second packer 3 is reduced, the pressure in the pressure compensation cavity 63 is reduced, the movable pipe 62 can move downwards, and liquid in the pressure compensation cavity 63 is discharged into the oil jacket annulus 9 below the second packer 3, so that the vacuum effect below the second packer 3 is reduced, the acting force required for deblocking is reduced, and the deblocking is more convenient.
In this embodiment, the movable tube 62 includes a tube body 621 and an annular protrusion 622 provided at an upper end of the tube body 621, the upper end of the movable tube 62 is slidably and sealingly engaged with the outer tube 61 through the annular protrusion 622, an outer pressure-bearing surface 623 of the movable tube 62 is L-shaped, and the outer pressure-bearing surface 623 includes a lower side surface of the annular protrusion 622 and a vertical section on an outer peripheral surface of the tube body 621 at a lower side of the annular protrusion 622. The inner pressure-bearing surface 624 of the movable tube 62 includes an inner wall surface of the tube body 621, an upper end surface of the tube body 621, a lower end surface of the tube body 621, and an upper side surface of the annular protrusion 622.
The outer cylinder 61 comprises a cylinder body 611, an upper connector 612 and a lower connector 613, wherein the cylinder body 611, the upper connector 612 and the lower connector 613 are all arranged in a split mode, and processing and assembly of the outer cylinder are facilitated. The upper connector 612 extends into the barrel 611, and the lower end surface of the upper connector 612 is adapted to be in a stop fit with the upper end surface of the movable tube 62 to limit the upper limit position of the movable tube 62. The lower joint 613 is fixed at the lower end of the cylinder 611 and extends into the cylinder 611, and the lower end of the movable tube 62 extends into the lower joint 613 and is in sliding sealing fit with the upper and lower guide of the lower joint 613. The upper end of the spring 7 is in pressing fit with the lower side face of the annular protrusion 622, and the lower end of the spring is in pressing fit with the upper end face of the lower joint 613, so that the structure is compact.
The upper end of the movable tube 62 is blocked by the upper connector 612, and the upper side surface of the annular protrusion 622 at the upper end of the movable tube 62 is matched with the upper end surface of the movable tube 62 in a blocking manner, so that the structure is simple, and the movable range of the movable tube 62 is conveniently limited. The lower joint 613 is matched with the movable tube 62 in an up-and-down guiding sliding way, so that the structure is simple and the processing is convenient.
In the pressure compensator 6 of the invention, the projection area of the upward part of the inner pressure-bearing surface 624 in the horizontal plane is larger than the projection area of the downward part in the horizontal plane, so that the inner pressure-bearing surface 624 is wholly stressed downwards under the action of the liquid pressure in the blocking tubular column. In the outer pressure-bearing surface 623, the lower side surface of the annular projection 622 is forced upward by the pressure of the liquid in the pressure compensating chamber 63. The pressure replenishment chamber communicates with the oil jacket annulus and as the pressure in the oil jacket annulus changes, the resultant force experienced by the movable tube 62 in the up-down direction changes.
The pressure compensation chamber 63 is surrounded by the movable tube 62 and the outer tube 61, wherein the upper side wall surface and the inner side wall surface of the pressure compensation chamber 63 are positioned on the movable tube 62, the lower side wall surface and the outer side wall surface are respectively positioned on the lower joint 613 and the cylinder 611, and when the pressure in the pressure compensation chamber 63 changes, the movable tube 62 can movably compensate the pressure change relative to the cylinder 611, so that the packer can be conveniently set.
The pressure compensator 6 of the present invention is assembled by connecting the lower joint 613 with the cylinder 611, then fitting the spring 7 and the movable tube 62 into the cylinder 611, and then fixing the upper joint 612 with the cylinder 611.
The blocking pipe column working principle is that when the third oil layer needs to be tested, the pipe column is lowered to the designed depth, the pipe column is lifted up and lowered down, the setting of the first packer 2 and the second packer 3 is achieved, and liquid in the third oil layer enters the oil pipe through the screen pipe 4. When the second oil layer needs to be tested, lifting the pipe column to unseal the first packer 2 and the second packer 3, lifting the pipe column to the designed depth, and realizing blocking of the second oil layer; when the first oil layer needs to be tested, the method is the same as the above method, and will not be repeated.
During setting, the first packer 2 and the second packer 3 are used for blocking the target layer, when the pipe column is lifted, the annular pressure of the oil jacket below the second packer 3 is reduced, the pressure in the pressure compensation cavity 63 is reduced, the movable pipe 62 moves downwards under the action of the liquid pressure in the pipe column, the volume of the pressure compensation cavity 63 is reduced, the liquid in the pressure compensation cavity 63 flows out, the influence of the vacuum effect on the pipe column when the pipe column is lifted is reduced, the unpacking load is reduced, and the unpacking is more facilitated.
The structure of the blocking pipe column in this embodiment differs from that of the specific embodiment only in that, in addition to being capable of reducing the deblocking load during deblocking, as shown in fig. 3, a force-receiving shear member 8 is disposed between the movable pipe 62 and the outer cylinder 61, and a movable pipe upward-moving space 10 is disposed above the movable pipe 62 for allowing the movable pipe 62 to move upward relative to the outer cylinder 61 to increase the volume of the pressure compensating chamber 63 after the force-receiving shear member 8 is sheared by increasing the pressure in the pressure compensating chamber 63. In this embodiment, the shear member 8 is a shear pin. When in setting, the space of the oil sleeve annulus below the second packer 3 is compressed, high-pressure liquid enters the pressure compensation cavity 63 through the pressure compensation hole 64, when the pressure is too high, the stressed shearing piece 8 is sheared, at the moment, the movable tube 62 can move upwards, the volume of the pressure compensation cavity 63 is increased, the pressure of the space below the second packer 3 is further reduced, the setting tonnage is reduced, and the setting is facilitated.
The blocking pipe column of embodiment 3 of the present invention differs from the above embodiment only in that in this embodiment, the spring is located on the upper side of the movable pipe.
The difference between the structure of the blocking pipe column in the embodiment 4 and the above embodiment is that in the embodiment, the outer pressure-bearing surface of the movable pipe further includes an upward outer downward pressure-bearing portion, and the projection area of the outer downward pressure-bearing portion in the horizontal plane is smaller than the projection of the lower side surface of the annular protrusion in the horizontal plane.
The blocking pipe column of the embodiment 5 of the present invention differs from the above embodiment only in that the movable pipe may have no annular protrusion, and the lower end of the movable pipe may be provided with a thinned portion, where the thinned portion is inserted into the lower joint and is in sliding sealing engagement with the lower joint.
In the embodiment 6 of the blocking pipe column of the present invention, the structure of the blocking pipe column is different from that of the above embodiment only in that in the embodiment, the upper joint and the cylinder are integrally formed, and in other embodiments, the lower joint and the cylinder may be integrally formed.
The above description is only a preferred embodiment of the present invention, and the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A stuck tubular string, comprising:
the plug is used for plugging the bottom of the pipe column;
The first packer is positioned on the upper side of the plugging head and is used for being set in the casing;
The second packer is positioned on the upper side of the plugging head and on the lower side of the first packer, and is matched with the first packer to seal the upper side and the lower side of the target interval;
the screen pipe is positioned between the first packer and the second packer and is communicated with an upper oil pipe of the pipe column;
the blocking tubular column is characterized by comprising a pressure compensator, wherein the pressure compensator is connected in series between the plug and the second packer; the pressure compensator includes:
An outer cylinder;
The movable pipe is arranged in the outer cylinder in a sliding sealing manner, a pressure compensation cavity which is separated from the inner cavity of the sieve tube is formed by the movable pipe and the outer cylinder in a surrounding manner, a pressure compensation hole which is communicated with the pressure compensation cavity and the outside of the pressure compensator is formed in the outer cylinder, and the pressure compensation hole is communicated with the lower part of the pressure compensation cavity;
a spring for applying an upward elastic force to the movable tube;
The movable pipe is provided with an inner side pressure bearing surface, and the inner side pressure bearing surface applies downward acting force to the movable pipe under the pressure of liquid in the blocking pipe column;
the movable pipe is also provided with an outer bearing surface for forming a part of the inner wall surface of the pressure compensation cavity, and the outer bearing surface applies upward acting force to the movable pipe under the pressure of liquid in the pressure compensation cavity;
when the liquid pressure in the blocking pipe column is larger than the liquid pressure in the pressure compensation cavity, the movable pipe moves downwards under the acting force received by the inner pressure bearing surface.
2. The blocking tubular column according to claim 1, wherein the movable tube comprises a tube body and an annular protrusion arranged at the upper end of the tube body, the upper end of the movable tube is in sliding sealing fit with the outer cylinder through the annular protrusion, the outer bearing surface of the movable tube is L-shaped, and the outer bearing surface comprises the lower side surface of the annular protrusion and a vertical section on the outer peripheral surface of the tube body, which is positioned at the lower side of the annular protrusion.
3. The pipe string according to claim 2, wherein the inner pressure bearing surface of the movable pipe comprises an inner wall surface of the pipe body, an upper end surface of the pipe body, a lower end surface of the pipe body, and an upper side surface of the annular protrusion.
4. The pipe string according to claim 2, wherein the upper end of the spring is in press fit with the underside of the annular protrusion.
5. The pipe string according to any one of claims 1 to 4, wherein the outer cylinder comprises a cylinder body and an upper joint, the cylinder body is arranged separately from the upper joint, the upper joint extends into the cylinder body, and the upper joint is used for being matched with the upper and lower stop of the movable pipe so as to limit the upper limit position of the movable pipe.
6. The plugging tubular column according to any one of claims 1-4, wherein the outer cylinder comprises a cylinder body and a lower joint, the cylinder body and the lower joint are arranged separately, the lower joint is fixed at the lower end of the cylinder body and extends into the cylinder body, and the lower end of the movable pipe extends into the lower joint and is in sliding sealing fit with the upper and lower guide of the lower joint.
7. The pipe string of claim 6, wherein the outer barrel includes an upper fitting secured to an upper end of the barrel, the upper fitting extending into the barrel and adapted to engage the upper and lower stops of the movable pipe to limit the upper limit position of the movable pipe.
8. The pipe string of claim 6, wherein the upper end surface of the lower sub is in press fit with the spring.
9. A stuck pipe string as claimed in any one of claims 1 to 4, wherein the spring is in a pressure compensating chamber.
10. The pipe string according to any one of claims 1 to 4, wherein a force-receiving shear member is provided between the movable pipe and the outer cylinder, and a movable pipe upward movement space is provided above the movable pipe for the movable pipe to move upward relative to the outer cylinder to increase the volume of the pressure compensation chamber after the force-receiving shear member is sheared by the pressure increase in the pressure compensation chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661993.7A CN113338919B (en) | 2021-06-15 | 2021-06-15 | Blocking tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661993.7A CN113338919B (en) | 2021-06-15 | 2021-06-15 | Blocking tubular column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113338919A CN113338919A (en) | 2021-09-03 |
| CN113338919B true CN113338919B (en) | 2024-05-17 |
Family
ID=77477198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110661993.7A Active CN113338919B (en) | 2021-06-15 | 2021-06-15 | Blocking tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113338919B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2499570Y (en) * | 2001-10-12 | 2002-07-10 | 中国石油天然气股份有限公司 | Double-cavity type anti-blocking underground chemical mixing valve |
| CN201297145Y (en) * | 2008-05-23 | 2009-08-26 | 禹栽星 | Limit anchor used for chemical water plugging of oil well |
| RU92689U1 (en) * | 2009-11-09 | 2010-03-27 | Общество с ограниченной ответственностью "Научно-производственная фирма Завод "Измерон" | PACKER WITH CABLE INPUT |
| CN202300216U (en) * | 2011-10-19 | 2012-07-04 | 中国石油化工股份有限公司 | Connecting device for deblocking down-hole string |
| CN111577179A (en) * | 2020-06-05 | 2020-08-25 | 中国石油化工股份有限公司 | Movable bottom plug |
| CN111997564A (en) * | 2020-08-04 | 2020-11-27 | 中国石油化工股份有限公司 | Integrative water-plugging pipe column of looking for of bottom block and pump seal moves about |
| CN111997563A (en) * | 2020-08-04 | 2020-11-27 | 中国石油化工股份有限公司 | Pump-sealing integrated water finding and blocking pipe column and moving bottom block thereof |
| CN112855098A (en) * | 2021-02-19 | 2021-05-28 | 大庆市天德忠石油科技有限公司 | Water plugging pipe column |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2505773B1 (en) * | 2011-03-30 | 2013-05-08 | Welltec A/S | Downhole pressure compensating device |
-
2021
- 2021-06-15 CN CN202110661993.7A patent/CN113338919B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2499570Y (en) * | 2001-10-12 | 2002-07-10 | 中国石油天然气股份有限公司 | Double-cavity type anti-blocking underground chemical mixing valve |
| CN201297145Y (en) * | 2008-05-23 | 2009-08-26 | 禹栽星 | Limit anchor used for chemical water plugging of oil well |
| RU92689U1 (en) * | 2009-11-09 | 2010-03-27 | Общество с ограниченной ответственностью "Научно-производственная фирма Завод "Измерон" | PACKER WITH CABLE INPUT |
| CN202300216U (en) * | 2011-10-19 | 2012-07-04 | 中国石油化工股份有限公司 | Connecting device for deblocking down-hole string |
| CN111577179A (en) * | 2020-06-05 | 2020-08-25 | 中国石油化工股份有限公司 | Movable bottom plug |
| CN111997564A (en) * | 2020-08-04 | 2020-11-27 | 中国石油化工股份有限公司 | Integrative water-plugging pipe column of looking for of bottom block and pump seal moves about |
| CN111997563A (en) * | 2020-08-04 | 2020-11-27 | 中国石油化工股份有限公司 | Pump-sealing integrated water finding and blocking pipe column and moving bottom block thereof |
| CN112855098A (en) * | 2021-02-19 | 2021-05-28 | 大庆市天德忠石油科技有限公司 | Water plugging pipe column |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113338919A (en) | 2021-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4688634A (en) | Running and setting tool for well packers | |
| CN111075388B (en) | Hydraulic releasing packer and method for preventing midway setting | |
| CN103114843A (en) | Multi-layer section continuous oil testing system without tripping tubular column and operation method thereof | |
| CN111980619A (en) | Oil pipe plug | |
| CN113338919B (en) | Blocking tubular column | |
| CN104314518B (en) | switch tool | |
| CN112983340B (en) | Packer for ultra-deep well | |
| CN111997564B (en) | Integrative water-plugging pipe column of looking for of bottom block and pump seal moves about | |
| CN214145443U (en) | Balance anchor tile packer | |
| CN110847846B (en) | Packer for oil field exploitation | |
| US7278477B2 (en) | Cup tool, cup tool cup and method of using the cup tool | |
| CN111577179A (en) | Movable bottom plug | |
| CN114059964A (en) | Hydraulic closing tool for closing sliding sleeve switch and sliding sleeve switch tool assembly | |
| CN212716503U (en) | Movable bottom plug | |
| CN111577167B (en) | Multifunctional Power Slips | |
| CN111042762B (en) | Lifting pressure deblocking expansion packer | |
| CN204327045U (en) | switch tool | |
| CN209324306U (en) | A kind of preventer and oil/gas well | |
| CN110905438B (en) | Forced unpacking packer and control method thereof | |
| CN114458236A (en) | Soluble bridge plug for petroleum and natural gas drilling | |
| CN205823246U (en) | A kind of gravel-pack assembly and shaft bottom packing tool thereof | |
| CN209892152U (en) | Self-compensating open hole packer | |
| CN108086938B (en) | Packer | |
| CN215672120U (en) | Differential pressure compensation type mechanical setting packer | |
| CN214366012U (en) | Horizontal well perforating device for oil exploration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |