CN111535770A - Expansion suspension casing repairing well completion device - Google Patents
Expansion suspension casing repairing well completion device Download PDFInfo
- Publication number
- CN111535770A CN111535770A CN202010670009.9A CN202010670009A CN111535770A CN 111535770 A CN111535770 A CN 111535770A CN 202010670009 A CN202010670009 A CN 202010670009A CN 111535770 A CN111535770 A CN 111535770A
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- China
- Prior art keywords
- column structure
- tubular column
- sealing ring
- pipe
- outer tubular
- 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.)
- Pending
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 76
- 238000001125 extrusion Methods 0.000 claims abstract description 10
- 210000000664 rectum Anatomy 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000004873 anchoring Methods 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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)
- Earth Drilling (AREA)
Abstract
The invention is suitable for the field of oilfield mechanical equipment, and particularly relates to an expansion suspension casing repairing and well completing device which comprises an inner tubular column structure and an outer tubular column structure; the inner tubular column structure is inserted into the outer tubular column structure and is connected in a separable manner; the outer pipe column structure is sleeved with an upper sealing ring and a lower sealing ring; an expansion shaft is arranged on the inner tubular column structure in a manner of matching with the upper sealing ring and the lower sealing ring; after the inner tubular column structure is driven, the inner tubular column structure is moved in the outer tubular column structure in a separable manner, so that the inner tubular column structure is separated from the outer tubular column structure; the inner tubular column structure extrudes the outer tubular column structure through the expansion shaft, the outer tubular column structure expands outwards under the extrusion action, the outer tubular column structure drives the upper sealing ring and the lower sealing ring to expand outwards, the drift diameter is enlarged, the application of later yield increasing measures can be met, and the production requirement is met; meanwhile, the upper sealing ring and the lower sealing ring can ensure the sealing reliability and the anchoring reliability.
Description
Technical Field
The invention relates to the field of oilfield mechanical equipment, in particular to an expansion suspension casing repairing and well completing device.
Background
With the wide application of oil field production increasing measures, especially after years of oil and gas development of old oil fields, a large number of production stopping wells, abandoned wells and casing damage low-efficiency wells exist. The method adopts the side drilling technology to recover the oil and gas production of the old well, improves the recovery ratio, saves the drilling cost and the ground construction cost, and is a very effective measure.
The tail pipe hanging technology for the existing side drilling in China has the defects that the used tail pipe is small in size, a hanger is used at the top of the tail pipe, the hanger is complex in structure, the inner diameter of a tool is small, effective sealing cannot be formed, and well fluid leakage cannot be caused, for example, Chinese patent (No. CN 101403281B) discloses a tail pipe drilling and well completion process, but the tail pipe drilling and well completion inner diameter of complex layers in deep wells and ultra-deep wells is small, the used tail pipe hanger is complex in structure, and great risks are brought to tail pipe drilling and well completion construction.
Disclosure of Invention
The invention aims to provide an expansion suspension casing repairing well completion device, which solves the problems that the tail pipe used in the existing domestic side drilling tail pipe suspension technology is small in size, a hanger is used at the top of the tail pipe, the hanger is complex in structure, the inner diameter of a tool is small, effective sealing cannot be formed, and well fluid is leaked. In order to realize the purpose, the following technical scheme is specifically provided:
an expansion suspension casing repair well completion device comprises an inner tubular column structure and an outer tubular column structure;
the inner tubular column structure is inserted into the outer tubular column structure and detachably connected through threads, and the inner tubular column structure is driven to move in the outer tubular column structure in a detachable mode to move in the outer tubular column structure; wherein the content of the first and second substances,
the inner pipe column structure is provided with an inner connector and an outer connector, the inner part of the outer pipe column structure is provided with a locking pipe in a matching way, the inner connector and the outer connector are in threaded connection, and the inner pipe column structure and the outer pipe column structure are in threaded separable connection through rotation;
the outer pipe column structure is sleeved with an upper sealing ring and a lower sealing ring; interior tubular column structure is gone up the cooperation and is gone up sealing ring and lower sealing ring and be equipped with the inflation axle, and through inflation axle extrusion outer tubular column structure after utilizing inner tubular column structure to carry out the disconnect-type removal in outer tubular column structure is inside, outer tubular column structure outwards expands under the squeezing action, accomplishes outer tubular column structure and drives the outside extension of upper seal ring and lower sealing ring, latus rectum grow.
The inner tubular column structure and the outer tubular column structure are detachably connected, and the inner tubular column structure is driven to move in the outer tubular column structure in a detachable mode to complete the separation of the inner tubular column structure and the outer tubular column structure; the inner tubular column structure extrudes the outer tubular column structure through the expansion shaft, the outer tubular column structure expands outwards under the extrusion action, the outer tubular column structure drives the upper sealing ring and the lower sealing ring to expand outwards, the drift diameter is enlarged, the application of later yield increasing measures can be met, and the production requirement is met; meanwhile, the upper sealing ring and the lower sealing ring can ensure the sealing reliability and the anchoring reliability.
In the invention: the inner tubular column structure is provided with a middle short section, the middle short section is connected to an expansion shaft, and one end of the expansion shaft, far away from the middle short section, is connected to the inner and outer connecting heads;
the middle short section is connected with an anti-rotation joint on one side far away from the expansion shaft, the other end of the anti-rotation joint is connected with a lifting joint, an upper joint is connected onto the lifting joint, and the upper joint is in threaded connection with an oil pipe.
Preferably: the anti-rotation joint is provided with a plurality of key grooves B distributed in an annular array on the outer wall.
Preferably: one end of the expansion shaft is provided with a guide conical surface A; and the other end is provided with a guide conical surface B.
Further scheme: the outer pipe column structure is provided with an expansion pipe, and the upper sealing ring and the lower sealing ring are sleeved on the expansion pipe;
the expansion pipe is sleeved with a releasing joint and is detachably fixed, and the application of the releasing joint ensures the reliability of releasing and the safety of construction;
the expansion pipe is connected to the locking pipe through threads.
Preferably: the expansion pipe and the releasing joint are detachably fixed through a plurality of releasing shear pins.
Preferably: the inner wall of the releasing joint is provided with a plurality of key grooves A which are distributed annularly.
In the invention: the tail pipe is arranged on the outer pipe column structure and connected through sealing threads, the guide head is connected to the tail pipe through the sealing threads and arranged in a conical shape, and the guide head can be guaranteed to be smoothly inserted to the designed depth by utilizing the conical guide structure.
The invention relates to an expansion suspension casing repairing well completion device which comprises an inner tubular column structure and an outer tubular column structure; the inner pipe column structure is inserted into the outer pipe column structure and is detachably connected with the outer pipe column structure, and the inner pipe column structure is driven to move in the outer pipe column structure to perform detachable movement; the outer pipe column structure is sleeved with an upper sealing ring and a lower sealing ring; the inner tubular column structure is matched with the upper sealing ring and the lower sealing ring to be provided with an expansion shaft, the outer tubular column structure is extruded through the expansion shaft after the inner tubular column structure is used for performing separated movement in the outer tubular column structure, and the outer tubular column structure is expanded outwards under the extrusion action, so that the outer tubular column structure drives the upper sealing ring and the lower sealing ring to expand outwards; the inner tubular column structure and the outer tubular column structure are detachably connected, and the inner tubular column structure is driven to move in the outer tubular column structure in a detachable mode to complete the separation of the inner tubular column structure and the outer tubular column structure; the inner tubular column structure extrudes the outer tubular column structure through the expansion shaft, the outer tubular column structure expands outwards under the extrusion action, the outer tubular column structure drives the upper sealing ring and the lower sealing ring to expand outwards, the drift diameter is enlarged, the application of later yield increasing measures can be met, and the production requirement is met; meanwhile, the upper sealing ring and the lower sealing ring can ensure the sealing reliability and the anchoring reliability.
Drawings
FIG. 1 is a schematic diagram of the construction of an expanded suspended casing completion assembly of the present invention.
Fig. 2 is a schematic diagram of a transverse cross-sectional structure at a-a in fig. 1.
Fig. 3 is a schematic diagram of a transverse cross-sectional structure at B-B in fig. 1.
In the figure: 1-upper joint, 2-lifting joint, 3-releasing joint, 4-releasing shear pin, 5-expansion pipe, 6-upper sealing ring, 7-anti-rotation joint, 8-middle short section, 9-lower sealing ring, 10-expansion shaft, 11-internal and external joint, 12-locking pipe, 13-tail pipe, 14-guide head, 21-guide conical surface A, 22-guide conical surface B, 23-keyway A and 24-keyway B.
Detailed Description
The invention aims to provide an expansion suspension casing repairing well completion device, which solves the problems that the tail pipe used in the existing domestic side drilling tail pipe suspension technology is small in size, a hanger is used at the top of the tail pipe, the hanger is complex in structure, the inner diameter of a tool is small, effective sealing cannot be formed, and well fluid is leaked. In order to realize the purpose, the following technical scheme is specifically provided:
in an embodiment of the present invention, as shown in fig. 1, an expanded suspended casing completion assembly comprises an inner tubular string structure and an outer tubular string structure; the inner tubular column structure is inserted into the outer tubular column structure and detachably connected through threads, and the inner tubular column structure is driven to move in the outer tubular column structure in a detachable mode to move in the outer tubular column structure; the inner pipe column structure is provided with an inner connector and an outer connector 11, the inner part of the outer pipe column structure is provided with a locking pipe 12 in a matching way, the inner connector and the outer connector 11 are in threaded connection with the locking pipe 12, and the inner pipe column structure and the outer pipe column structure are in threaded separable connection through rotation; the outer pipe column structure is sleeved with an upper sealing ring 6 and a lower sealing ring 9; interior tubular column structure is gone up the cooperation and is gone up sealing ring 6 and lower sealing ring 9 and be equipped with inflation axle 10, and tubular column structure extrudees outer tubular column structure through inflation axle 10 after the disconnect-type removal is carried out to tubular column structure inside outer tubular column structure in utilizing, and outer tubular column structure outwards expands under the squeezing action, accomplishes outer tubular column structure and drives sealing ring 6 and lower sealing ring 9 and outwards expands, and the latus rectum grow.
In the embodiment of the invention, the inner tubular column structure and the outer tubular column structure are connected in a separable way, and the inner tubular column structure is driven to move in the outer tubular column structure in a separable way to complete the separation of the inner tubular column structure and the outer tubular column structure; the inner tubular column structure extrudes the outer tubular column structure through the expansion shaft 10, the outer tubular column structure expands outwards under the extrusion action, the outer tubular column structure drives the upper sealing ring 6 and the lower sealing ring 9 to expand outwards, the drift diameter is enlarged, the application of later yield increasing measures can be met, and the production requirement is met; and meanwhile, the upper sealing ring 6 and the lower sealing ring 9 can ensure the sealing reliability and the anchoring reliability.
In the embodiment of the invention, as shown in fig. 1-3, a middle short section 8 is arranged on the inner tubular column structure, the middle short section 8 is connected to an expansion shaft 10, and one end of the expansion shaft 10, which is far away from the middle short section 8, is connected to an inner connector 11 and an outer connector 11; one side, far away from the expansion shaft 10, of the middle short section 8 is connected with an anti-rotation joint 7, the other end of the anti-rotation joint 7 is connected with a lifting joint 2, the lifting joint 2 is connected with an upper joint 1, and the upper joint 1 is in threaded connection with an oil pipe; preferably, the anti-rotation joint 7 is provided with a plurality of key slots B24 distributed in an annular array on the outer wall; one end of the expansion shaft 10 is provided with a guide conical surface A21; and the other end is provided with a guide conical surface B22.
In the embodiment of the invention, as shown in fig. 1-3, an expansion pipe 5 is arranged on the outer pipe column structure, and an upper sealing ring 6 and a lower sealing ring 9 are sleeved on the expansion pipe 5; the expansion pipe 5 is sleeved with the releasing joint 3 and is detachably fixed, and the application of the releasing joint 3 ensures the reliability of releasing and the safety of construction; the expansion tube 5 is connected to the locking tube 12 by means of a screw thread. Preferably, the expansion pipe 5 and the releasing joint 3 are detachably fixed through a plurality of releasing shear pins 4; the inner wall of the releasing connector 3 is provided with a plurality of key slots A23 distributed in a ring shape.
In the embodiment of the invention, as shown in fig. 1, a tail pipe 13 is arranged on the outer pipe column structure and is connected with the outer pipe column structure through a sealing thread, a guide head 14 is connected with the tail pipe 13 through the sealing thread, the guide head 14 is arranged in a conical shape, and the guide head 14 can ensure that the outer pipe column structure can be smoothly inserted to the designed depth by utilizing the conical guide structure.
The invention relates to an expansion suspension casing repairing well completion device which comprises an inner tubular column structure and an outer tubular column structure; the inner pipe column structure is inserted into the outer pipe column structure and is detachably connected with the outer pipe column structure, and the inner pipe column structure is driven to move in the outer pipe column structure to perform detachable movement; wherein, the outer pipe column structure is sleeved with an upper sealing ring 6 and a lower sealing ring 9; the inner tubular column structure is matched with the upper sealing ring 6 and the lower sealing ring 9 to be provided with an expansion shaft 10, the outer tubular column structure is extruded through the expansion shaft 10 after the inner tubular column structure is used for carrying out separated movement in the outer tubular column structure, the outer tubular column structure is expanded outwards under the extrusion action, and the outer tubular column structure drives the upper sealing ring 6 and the lower sealing ring 9 to be expanded outwards; the inner tubular column structure and the outer tubular column structure are detachably connected, and the inner tubular column structure is driven to move in the outer tubular column structure in a detachable mode to complete the separation of the inner tubular column structure and the outer tubular column structure; the inner tubular column structure extrudes the outer tubular column structure through the expansion shaft 10, the outer tubular column structure expands outwards under the extrusion action, the outer tubular column structure drives the upper sealing ring 6 and the lower sealing ring 9 to expand outwards, the drift diameter is enlarged, the application of later yield increasing measures can be met, and the production requirement is met; and meanwhile, the upper sealing ring 6 and the lower sealing ring 9 can ensure the sealing reliability and the anchoring reliability.
The working principle of the invention is as follows: the invention relates to an expansion suspension casing repairing well completion device, wherein the upper end of an upper joint 1 is connected with an oil pipe and then is put into a side-drilling oil well channel, a guide head 14 utilizes a conical guide structure to ensure that the oil pipe can be smoothly put into a designed depth, the oil pipe is rotated in a forward rotation manner to separate threads between an inner connector 11 and a locking pipe 12, so that an inner pipe column and an outer pipe column are separated, then the oil pipe is lifted upwards, a key groove B24 on the outer wall of an anti-rotation joint 7 and a key groove A23 on the inner wall of a releasing joint 3 are matched to prevent the inner pipe column from rotating and play a guiding role, the oil pipe is continuously lifted upwards, an expansion shaft 10 is contacted with a guiding conical surface B22 on the inner wall of the lower end of the expansion pipe 5, the expansion shaft 10 extrudes the expansion pipe 5 outwards under the extrusion effect of the expansion shaft 10, then a lower sealing ring 9 and an upper sealing ring 6 on the outer wall of the expansion pipe 5 are driven to expand outwards, and, and (3) continuously lifting the oil pipe, and after the expansion shaft 10 is contacted with the releasing joint 3, under the action of lifting pull force, the expansion shaft 10 drives the releasing joint 3 to shear the releasing shear pin 4 to complete the releasing work of the invention, so that the inner pipe column can be lifted out.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (8)
1. An expansion suspension casing repairing well completion device is characterized in that,
comprises an inner tubular column structure and an outer tubular column structure;
the inner tubular column structure is inserted into the outer tubular column structure and detachably connected through threads, and the inner tubular column structure is driven to move in the outer tubular column structure in a detachable mode to move in the outer tubular column structure; wherein the content of the first and second substances,
the inner pipe column structure is provided with an inner connector and an outer connector, the inner part of the outer pipe column structure is provided with a locking pipe in a matching way, the inner connector and the outer connector are in threaded connection, and the inner pipe column structure and the outer pipe column structure are in threaded separable connection through rotation;
the outer pipe column structure is sleeved with an upper sealing ring and a lower sealing ring; interior tubular column structure is gone up the cooperation and is gone up sealing ring and lower sealing ring and be equipped with the inflation axle, and through inflation axle extrusion outer tubular column structure after utilizing inner tubular column structure to carry out the disconnect-type removal in outer tubular column structure is inside, outer tubular column structure outwards expands under the squeezing action, accomplishes outer tubular column structure and drives the outside extension of upper seal ring and lower sealing ring, latus rectum grow.
2. The expanded suspended casing completion assembly of claim 1,
the inner tubular column structure is provided with a middle short section, the middle short section is connected to an expansion shaft, and one end of the expansion shaft, far away from the middle short section, is connected to the inner and outer connecting heads;
the middle short section is connected with an anti-rotation joint on one side far away from the expansion shaft, the other end of the anti-rotation joint is connected with a lifting joint, an upper joint is connected onto the lifting joint, and the upper joint is in threaded connection with an oil pipe.
3. The expanded suspended casing completion assembly of claim 2 wherein the anti-rotation fitting defines a plurality of keyways B in an annular array on the outer wall.
4. The expanded suspended casing repair completion device according to claim 2, wherein one end of the expansion shaft is provided with a guide conical surface A; and the other end is provided with a guide conical surface B.
5. The expanded suspended casing completion assembly of claim 1,
the outer pipe column structure is provided with an expansion pipe, and the upper sealing ring and the lower sealing ring are sleeved on the expansion pipe;
the expansion pipe is sleeved with a releasing joint and is detachably fixed;
the expansion pipe is connected to the locking pipe through threads.
6. The expanded suspended casing completion system of claim 5 wherein said expanded tubular and said release sub are removably secured by a plurality of release shear pins.
7. The expanded hanging casing completion device of claim 5 wherein said release sub defines a plurality of annularly disposed keyways A in an inner wall thereof.
8. The apparatus of claim 1 wherein the outer tubular string structure has a tail pipe and is connected thereto by a sealing thread, the tail pipe is connected to a guide head by a sealing thread, and the guide head is tapered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670009.9A CN111535770A (en) | 2020-07-13 | 2020-07-13 | Expansion suspension casing repairing well completion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670009.9A CN111535770A (en) | 2020-07-13 | 2020-07-13 | Expansion suspension casing repairing well completion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111535770A true CN111535770A (en) | 2020-08-14 |
Family
ID=71971204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010670009.9A Pending CN111535770A (en) | 2020-07-13 | 2020-07-13 | Expansion suspension casing repairing well completion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111535770A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080277111A1 (en) * | 2007-05-12 | 2008-11-13 | Braddick Britt O | Downhole tubular expansion tool and method |
| CN101614117A (en) * | 2009-07-30 | 2009-12-30 | 中国石油天然气股份有限公司 | A kind of expansion tube type liner hanger |
| CN201705227U (en) * | 2009-06-05 | 2011-01-12 | 中国石化集团胜利石油管理局钻井工艺研究院 | Inflation tail pipe hanger safety releasing mechanism |
| CN103628834A (en) * | 2012-08-23 | 2014-03-12 | 中国石油天然气股份有限公司 | Locking type expansion tail pipe hanger |
| CN209908438U (en) * | 2019-02-18 | 2020-01-07 | 中国石油天然气集团有限公司 | Disposable type tail pipe hanger |
| CN110965960A (en) * | 2018-09-29 | 2020-04-07 | 中国石油化工股份有限公司 | Well completion pipe string for changing bottom of well and operation method |
-
2020
- 2020-07-13 CN CN202010670009.9A patent/CN111535770A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080277111A1 (en) * | 2007-05-12 | 2008-11-13 | Braddick Britt O | Downhole tubular expansion tool and method |
| CN201705227U (en) * | 2009-06-05 | 2011-01-12 | 中国石化集团胜利石油管理局钻井工艺研究院 | Inflation tail pipe hanger safety releasing mechanism |
| CN101614117A (en) * | 2009-07-30 | 2009-12-30 | 中国石油天然气股份有限公司 | A kind of expansion tube type liner hanger |
| CN103628834A (en) * | 2012-08-23 | 2014-03-12 | 中国石油天然气股份有限公司 | Locking type expansion tail pipe hanger |
| CN110965960A (en) * | 2018-09-29 | 2020-04-07 | 中国石油化工股份有限公司 | Well completion pipe string for changing bottom of well and operation method |
| CN209908438U (en) * | 2019-02-18 | 2020-01-07 | 中国石油天然气集团有限公司 | Disposable type tail pipe hanger |
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Application publication date: 20200814 |
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| RJ01 | Rejection of invention patent application after publication |