CN117231167B - Releasing structure of acid liquid dumping cylinder - Google Patents
Releasing structure of acid liquid dumping cylinder Download PDFInfo
- Publication number
- CN117231167B CN117231167B CN202311482507.0A CN202311482507A CN117231167B CN 117231167 B CN117231167 B CN 117231167B CN 202311482507 A CN202311482507 A CN 202311482507A CN 117231167 B CN117231167 B CN 117231167B
- Authority
- CN
- China
- Prior art keywords
- lower joint
- pouring
- release structure
- sealing
- wall
- 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
- 239000002253 acid Substances 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 title claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000035939 shock Effects 0.000 abstract description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Frying-Pans Or Fryers (AREA)
Abstract
The invention belongs to the technical field of oil gas development, and discloses an acid liquor dumping cylinder release structure which comprises a lower joint communicated with a dumping cylinder, wherein a sealing mandrel is arranged in the lower joint, a starting pin is arranged on the side wall of the lower joint in a penetrating way, and the starting pin is inserted into the sealing mandrel; the upper end of the sealing mandrel is in sliding sealing connection with the inner wall of the lower joint, and the lower end of the sealing mandrel extends out of the lower joint and then is connected with the dumping rod; the side wall of the lower joint is provided with a through side hole. According to the acid liquor dumping cylinder release structure, the starting pin is sheared to start through downward shock of the jar, so that liquid meeting resistance can be prevented from being released in advance; when the device is used, the dumping rod is inserted into the inner diameter of the fishing neck of the restrictor, liquid medium slowly flows out from the side hole and is collected at the position of the fishing neck of the restrictor, so that the effect of releasing and unblocking at fixed points is achieved.
Description
Technical Field
The invention belongs to the technical field of oil gas development, and particularly relates to an acid liquor dumping cylinder release structure.
Background
The fixed throttler is generally salvaged and maintained by means of injecting hydrochloric acid or plugging removing agent at fixed points, flushing a continuous oil pipe and the like into a conventional acid liquor dumping cylinder, and connecting threads are machined at the upper end joint of a tool of the acid liquor dumping cylinder and are connected with a logging tool string. Acid liquor or other needed media can be filled in the cavity of the body at the lower end of the tool, and the bottom of the tool is composed of a piston type plugging device with O-ring seal. When the tool is lowered and blocked, the bottom piston is forced upwards to move upwards to release the seal, and the liquid medium is released from the gap of the piston quickly.
The existing acid liquor pouring cylinder has the following problems: when the oil pipe is subjected to complex well conditions such as reducing, the piston moves upwards when being subjected to resistance in the process of lowering the tool, and the liquid is released in advance, so that the soaking effect cannot be achieved; the tool normally goes down to the fishing neck of the throttle, and most of liquid medium released after the piston is stressed overflows from the inner channel of the throttle, so that the long-time soaking effect cannot be achieved.
Disclosure of Invention
The present invention aims to solve the above technical problems at least to some extent. Therefore, the invention aims to provide an acid liquor dumping cylinder release structure.
The technical scheme adopted by the invention is as follows:
the utility model provides an acidizing fluid emptys a section of thick bamboo release structure, includes the lower joint that is connected with empting a section of thick bamboo and sets up, is equipped with sealed dabber in the lower joint, runs through on the lateral wall of lower joint and is equipped with the start pin, and the start pin inserts sealed dabber setting; the upper end of the sealing mandrel is in sliding sealing connection with the inner wall of the lower joint, the lower end of the sealing mandrel extends out of the lower joint and then is connected with a dumping rod, and the dumping rod is used for being in sealing connection with the inner wall of the throttle; the side wall of the lower joint is provided with a through side hole.
Preferably, the lower extreme of sealing dabber is equipped with the external screw thread, and the dumping rod upper end is equipped with the internal thread hole, and the lower extreme screw thread of sealing dabber installs in the internal thread hole. The side wall of the internal thread hole is provided with a through locking hole, and a locking screw is arranged in the locking hole in a threaded manner.
Preferably, a first mounting groove is formed in the upper end of the sealing mandrel, and a sealing ring is arranged in the first mounting groove. The dumping rod is provided with a second mounting groove, and a sealing ring is arranged in the second mounting groove. The lower joint is in threaded connection with the dumping cylinder, and a sealing ring is arranged between the outer wall of the lower joint and the inner wall of the dumping cylinder.
The beneficial effects of the invention are as follows:
according to the acid liquor dumping cylinder release structure, the starting pin is sheared to start through downward shock of the jar, so that liquid meeting resistance can be prevented from being released in advance; when the device is used, the dumping rod is inserted into the inner diameter of the fishing neck of the restrictor, liquid medium slowly flows out from the side hole and is collected at the position of the fishing neck of the restrictor, so that the effect of releasing and unblocking at fixed points is achieved.
Drawings
FIG. 1 is a schematic view of the installation of the release structure of the acid pouring cylinder of the present invention.
FIG. 2 is a schematic diagram of the structure of the release structure of the acid pouring barrel of the invention.
FIG. 3 is a half cross-sectional view of the release structure of the acid pouring cartridge of the present invention.
Fig. 4 is a cross-sectional view of the lower joint of the present invention.
In the figure: 1-a dumping cylinder; 2-lower joint; 3-sealing the mandrel; 4-starting a pin; 5-a dumping bar; 6-side holes; 7-locking holes; 8-a first mounting groove; 9-a second mounting groove.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting 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.
In the present invention, unless explicitly specified and limited 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; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements.
The invention will be further described with reference to the drawings and specific examples.
As shown in fig. 1 to 4, the acid liquor dumping cylinder release structure of the embodiment comprises a lower joint 2 communicated with a dumping cylinder 1, wherein the lower joint 2 is of a structure penetrating through the inside up and down, the upper end of the lower joint 2 is in threaded connection with the dumping cylinder 1, and a sealing ring is arranged between the outer wall of the lower joint 2 and the inner wall of the dumping cylinder 1 to keep sealing.
A sealing mandrel 3 is arranged in the lower joint 2, the upper end of the sealing mandrel 3 is in sliding connection with the inner wall of the lower joint 2, a first mounting groove 8 is arranged at the upper end of the sealing mandrel 3, and a sealing ring is arranged in the first mounting groove 8 to keep sealing; the lower end of the sealing mandrel 3 extends out of the lower joint 2 and then is connected with the dumping rod 5, specifically, the lower end of the sealing mandrel 3 is provided with external threads, the upper end of the dumping rod 5 is provided with an internal threaded hole, and the lower end thread of the sealing mandrel 3 is arranged in the internal threaded hole; the side wall of the internal thread hole is provided with a through locking hole 7, a locking screw is arranged in the locking hole 7 in a threaded manner, and the locking screw props against the lower end of the sealing mandrel 3, so that the connection stability is ensured.
A starting pin 4 is penetrated and arranged on the side wall of the middle part of the lower joint 2, and the starting pin 4 is inserted into the sealing mandrel 3 for arrangement; the side wall of the lower joint 2 is provided with a through side hole 6, a plurality of side holes 6 are uniformly distributed on the lower joint 2 circumferentially, and as shown in fig. 4, the side holes 6 are inclined downwards by 45 degrees.
The dumping rod 5 is used for being connected with the inner wall of the throttle, a second mounting groove 9 is formed in the dumping rod 5, a sealing ring is arranged in the second mounting groove 9, when the tool is put down, the dumping rod 5 is inserted into the inner diameter of the fishing neck of the throttle, and the sealing ring in the second mounting groove 9 and the inner wall of the throttle form a closed state, so that the liquid can be effectively prevented from overflowing along with the inner diameter of the fishing neck of the throttle; the starting pin 4 is sheared by downward jarring of the jar, the sealing mandrel 3 and the dumping rod 5 move upwards under the action of force, the sealing contact between the upper end of the sealing mandrel 3 and the inner wall of the lower joint 2 is released, the liquid medium in the dumping cylinder 1 enters the lower joint 2 and slowly flows out from the side hole 6, and is collected at the throttle salvaging neck part, so that the fixed-point releasing and unblocking effect is achieved.
The invention is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present invention, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present invention, fall within the scope of protection of the present invention.
Claims (8)
1. An acidizing fluid emptys section of thick bamboo release structure, its characterized in that: the automatic pouring device comprises a lower joint (2) communicated with a pouring barrel (1), wherein a sealing mandrel (3) is arranged in the lower joint (2), a starting pin (4) is arranged on the side wall of the lower joint (2) in a penetrating manner, and the starting pin (4) is inserted into the sealing mandrel (3); the upper end of the sealing mandrel (3) is in sliding sealing connection with the inner wall of the lower joint (2), the lower end of the sealing mandrel (3) stretches out of the lower joint (2) and then is connected with the pouring rod (5), the pouring rod (5) is used for being in sealing connection with the inner wall of the restrictor, and the pouring rod (5) is inserted into the inner diameter of the salvaging neck of the restrictor and used for preventing liquid medium from overflowing along with the inner diameter of the salvaging neck of the restrictor; the side wall of the lower joint (2) is provided with a through side hole (6).
2. The acid pouring cartridge release structure according to claim 1, wherein: the lower extreme of sealed dabber (3) is equipped with the external screw thread, and the upper end of empting pole (5) is equipped with the internal thread hole, and the lower extreme screw thread of sealed dabber (3) is installed in the internal thread hole.
3. The acid pouring cartridge release structure according to claim 2, wherein: the side wall of the internal thread hole is provided with a through locking hole (7), and a locking screw is arranged in the locking hole (7) in a threaded manner.
4. The acid pouring cartridge release structure according to claim 1, wherein: the upper end of the sealing mandrel (3) is provided with a first mounting groove (8), and a sealing ring is arranged in the first mounting groove (8).
5. The acid pouring cartridge release structure according to claim 1, wherein: the lower joint (2) is in threaded connection with the pouring barrel (1), and a sealing ring is arranged between the outer wall of the lower joint (2) and the inner wall of the pouring barrel (1).
6. The acid pouring cartridge release structure according to claim 1, wherein: the pouring rod (5) is provided with a second mounting groove (9), and a sealing ring is arranged in the second mounting groove (9).
7. The acid pouring cartridge release structure according to claim 1, wherein: the side holes (6) are arranged obliquely downwards by 45 degrees.
8. The acid liquor pouring cartridge release structure according to claim 1 or 7, characterized in that: the side holes (6) are circumferentially and uniformly distributed on the lower joint (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311482507.0A CN117231167B (en) | 2023-11-09 | 2023-11-09 | Releasing structure of acid liquid dumping cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311482507.0A CN117231167B (en) | 2023-11-09 | 2023-11-09 | Releasing structure of acid liquid dumping cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117231167A CN117231167A (en) | 2023-12-15 |
| CN117231167B true CN117231167B (en) | 2024-02-02 |
Family
ID=89091555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311482507.0A Active CN117231167B (en) | 2023-11-09 | 2023-11-09 | Releasing structure of acid liquid dumping cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117231167B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482914B (en) * | 2020-10-27 | 2024-10-22 | 中国石油化工股份有限公司 | Plugging device for oil-water well and use method |
Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2852080A (en) * | 1956-08-29 | 1958-09-16 | Harold Brown Company | Chemical injector for well tubing |
| CA2260934A1 (en) * | 1996-10-04 | 1998-04-09 | Dennis M. Read | Improved emergency release tool |
| JP2003261975A (en) * | 2002-03-11 | 2003-09-19 | Toto Ltd | Sustained-release device |
| CA2444043A1 (en) * | 2003-10-08 | 2005-04-08 | L. Murray Dallas | Well stimulation tool and method for inserting a backpressure plug through a mandrel of the tool |
| CN201137480Y (en) * | 2007-07-06 | 2008-10-22 | 中国石化股份胜利油田分公司孤东采油厂 | Oil well borehole chemical agent deposition slow releasing device |
| WO2011071593A1 (en) * | 2009-12-11 | 2011-06-16 | Conocophillips Company | Continuous slow dissolving chemical treatment for oil and gas wells |
| CN202187750U (en) * | 2011-08-03 | 2012-04-11 | 北京金科龙石油技术开发有限公司 | Preset type underground throttling device |
| CN202249941U (en) * | 2011-08-15 | 2012-05-30 | 中国石油化工股份有限公司 | Layering acidification drain valve |
| CN102979482A (en) * | 2012-11-28 | 2013-03-20 | 中国海洋石油总公司 | Butt jointing and diverting means for chemical agent channel outside oil pipe in downhole |
| RU2012101611A (en) * | 2012-01-17 | 2013-07-27 | Эдуард Михайлович Тосунов | METHOD FOR PROCESSING BOTTOM ZONE |
| CN203783547U (en) * | 2013-10-18 | 2014-08-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Prefabricated throttle, throwing-in tool of prefabricated throttle and pushing rod of fishing tool of prefabricated throttle |
| WO2014142899A1 (en) * | 2013-03-14 | 2014-09-18 | Halliburton Energy Services Inc. | Pressure responsive downhole tool having an adjustable shear thread retaining mechanism and related methods |
| CN104141477A (en) * | 2014-07-28 | 2014-11-12 | 克拉玛依市红都有限责任公司 | Concentric three-tube separated layer water injection device and using method thereof |
| CN206053900U (en) * | 2016-08-25 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of hydraulic control self solves sealed packer |
| CN206329310U (en) * | 2016-11-08 | 2017-07-14 | 中海油能源发展股份有限公司 | Oil field water and oil control technological measure operation medicament implantation tool |
| CN206571462U (en) * | 2017-02-23 | 2017-10-20 | 中石化石油工程技术服务有限公司 | A kind of Multifunctional underwell valve |
| CN110617041A (en) * | 2019-10-09 | 2019-12-27 | 中国石油天然气股份有限公司 | Water injection well water absorption profile adjusting sleeve and adjusting method |
| CN210918981U (en) * | 2019-09-04 | 2020-07-03 | 中国石油化工股份有限公司 | Novel underground agent injection valve |
| CN210977429U (en) * | 2019-08-14 | 2020-07-10 | 中国石油化工股份有限公司 | Device for injecting, extracting and discharging |
| CN111779466A (en) * | 2020-06-29 | 2020-10-16 | 孙宇斐 | Method for solving problem of shaft blockage of failed prefabricated restrictor through hydraulic sand blasting perforation process |
| CN115263241A (en) * | 2022-08-08 | 2022-11-01 | 周泽晟 | Down-hole turbulent flow long-acting corrosion-proof and scale-proof device |
| CN115263240A (en) * | 2021-04-29 | 2022-11-01 | 中国石油天然气股份有限公司 | Filling device and method for oil well plugging reducing agent |
| CN116146155A (en) * | 2021-11-19 | 2023-05-23 | 中国石油天然气集团有限公司 | Nozzle, self-rotating spray head, continuous pipe operation equipment and continuous pipe operation vehicle |
| CN219344655U (en) * | 2023-04-07 | 2023-07-14 | 克拉玛依胜利高原机械有限公司 | Plugging and dosing device for downhole oil pipe |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7546878B2 (en) * | 2006-12-14 | 2009-06-16 | Schlumberger Technology Corporation | Chemical deployment canisters for downhole use |
| US9187994B2 (en) * | 2010-09-22 | 2015-11-17 | Packers Plus Energy Services Inc. | Wellbore frac tool with inflow control |
| US11781413B2 (en) * | 2020-02-04 | 2023-10-10 | Halliburton Energy Services, Inc. | Downhole acid injection to stimulate formation production |
| US11448027B2 (en) * | 2020-08-14 | 2022-09-20 | Saudi Arabian Oil Company | Acid wash system for wireline and slickline |
-
2023
- 2023-11-09 CN CN202311482507.0A patent/CN117231167B/en active Active
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2852080A (en) * | 1956-08-29 | 1958-09-16 | Harold Brown Company | Chemical injector for well tubing |
| CA2260934A1 (en) * | 1996-10-04 | 1998-04-09 | Dennis M. Read | Improved emergency release tool |
| JP2003261975A (en) * | 2002-03-11 | 2003-09-19 | Toto Ltd | Sustained-release device |
| CA2444043A1 (en) * | 2003-10-08 | 2005-04-08 | L. Murray Dallas | Well stimulation tool and method for inserting a backpressure plug through a mandrel of the tool |
| CN201137480Y (en) * | 2007-07-06 | 2008-10-22 | 中国石化股份胜利油田分公司孤东采油厂 | Oil well borehole chemical agent deposition slow releasing device |
| WO2011071593A1 (en) * | 2009-12-11 | 2011-06-16 | Conocophillips Company | Continuous slow dissolving chemical treatment for oil and gas wells |
| CN202187750U (en) * | 2011-08-03 | 2012-04-11 | 北京金科龙石油技术开发有限公司 | Preset type underground throttling device |
| CN202249941U (en) * | 2011-08-15 | 2012-05-30 | 中国石油化工股份有限公司 | Layering acidification drain valve |
| RU2012101611A (en) * | 2012-01-17 | 2013-07-27 | Эдуард Михайлович Тосунов | METHOD FOR PROCESSING BOTTOM ZONE |
| CN102979482A (en) * | 2012-11-28 | 2013-03-20 | 中国海洋石油总公司 | Butt jointing and diverting means for chemical agent channel outside oil pipe in downhole |
| WO2014142899A1 (en) * | 2013-03-14 | 2014-09-18 | Halliburton Energy Services Inc. | Pressure responsive downhole tool having an adjustable shear thread retaining mechanism and related methods |
| CN203783547U (en) * | 2013-10-18 | 2014-08-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Prefabricated throttle, throwing-in tool of prefabricated throttle and pushing rod of fishing tool of prefabricated throttle |
| CN104141477A (en) * | 2014-07-28 | 2014-11-12 | 克拉玛依市红都有限责任公司 | Concentric three-tube separated layer water injection device and using method thereof |
| CN206053900U (en) * | 2016-08-25 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of hydraulic control self solves sealed packer |
| CN206329310U (en) * | 2016-11-08 | 2017-07-14 | 中海油能源发展股份有限公司 | Oil field water and oil control technological measure operation medicament implantation tool |
| CN206571462U (en) * | 2017-02-23 | 2017-10-20 | 中石化石油工程技术服务有限公司 | A kind of Multifunctional underwell valve |
| CN210977429U (en) * | 2019-08-14 | 2020-07-10 | 中国石油化工股份有限公司 | Device for injecting, extracting and discharging |
| CN210918981U (en) * | 2019-09-04 | 2020-07-03 | 中国石油化工股份有限公司 | Novel underground agent injection valve |
| CN110617041A (en) * | 2019-10-09 | 2019-12-27 | 中国石油天然气股份有限公司 | Water injection well water absorption profile adjusting sleeve and adjusting method |
| CN111779466A (en) * | 2020-06-29 | 2020-10-16 | 孙宇斐 | Method for solving problem of shaft blockage of failed prefabricated restrictor through hydraulic sand blasting perforation process |
| CN115263240A (en) * | 2021-04-29 | 2022-11-01 | 中国石油天然气股份有限公司 | Filling device and method for oil well plugging reducing agent |
| CN116146155A (en) * | 2021-11-19 | 2023-05-23 | 中国石油天然气集团有限公司 | Nozzle, self-rotating spray head, continuous pipe operation equipment and continuous pipe operation vehicle |
| CN115263241A (en) * | 2022-08-08 | 2022-11-01 | 周泽晟 | Down-hole turbulent flow long-acting corrosion-proof and scale-proof device |
| CN219344655U (en) * | 2023-04-07 | 2023-07-14 | 克拉玛依胜利高原机械有限公司 | Plugging and dosing device for downhole oil pipe |
Non-Patent Citations (2)
| Title |
|---|
| 塔河油田分层酸压、采油管柱技术;李子甲;新疆石油学院学报(第04期);全文 * |
| 李子甲.塔河油田分层酸压、采油管柱技术.新疆石油学院学报.2001,(第04期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117231167A (en) | 2023-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN117231167B (en) | Releasing structure of acid liquid dumping cylinder | |
| CN104213868B (en) | Desirable bore anchor packer | |
| CN108386160B (en) | Blockage removal type sand prevention pipe column structure capable of flushing lower sieve pipe of pump | |
| CN110905443A (en) | Soluble metal sealing fracturing bridge plug | |
| CN209724292U (en) | A kind of extension hanger fluid pressure type containing pipe nipple | |
| CN217176568U (en) | Overflow well ash injection valve and overflow well ash injection pipe column | |
| CN217176566U (en) | Cementing plug slide valve and cementing plug tubular column | |
| CN114059951B (en) | Fishing type falling-preventing device and falling-preventing device using same | |
| CN2756816Y (en) | Sand-proof pipe external gravel filling sand-proof well-flushing compensator | |
| CN112096301A (en) | Sand prevention integrated well completion pipe string for replacing slurry and washing oil and gas well and replacing slurry and washing method | |
| CN107762459B (en) | Separate-layer water injection pipe column | |
| CN211666685U (en) | Soluble plugging tool for tail end of speed pipe column | |
| CN208718610U (en) | It is a kind of can dock recycle setting insert pump blowout hookup | |
| CN110080720B (en) | Balanced type impact blowout prevention oil drainage device | |
| CN216277802U (en) | Anti-overflow oil pipe valve | |
| CN213540261U (en) | Casing lowering buoyancy load-reducing sealing device | |
| CN214464066U (en) | Bridge plug for pressure relief and deblocking | |
| CN218206636U (en) | Fishing spear | |
| CN215169918U (en) | Self-unsealing downhole choke | |
| CN215292423U (en) | Secondary blowout prevention tool | |
| CN215369779U (en) | Setting blanking plug | |
| CN220705680U (en) | Gas well throttler without fishing | |
| CN212803165U (en) | Bottom valve for water injection process | |
| CN220226775U (en) | Anti-drop filter screen structure of drill rod | |
| CN213269843U (en) | Detachable bridge plug |
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 |