CN106703732B - Composite force-application expansion pipe device and operation method thereof - Google Patents
Composite force-application expansion pipe device and operation method thereof Download PDFInfo
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- CN106703732B CN106703732B CN201710083640.7A CN201710083640A CN106703732B CN 106703732 B CN106703732 B CN 106703732B CN 201710083640 A CN201710083640 A CN 201710083640A CN 106703732 B CN106703732 B CN 106703732B
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- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 99
- 238000004873 anchoring Methods 0.000 claims abstract description 69
- 238000007789 sealing Methods 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 3
- 230000008439 repair process Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003466 welding Methods 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
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- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a composite force-application expansion pipe device and an operation method thereof, which are applied to the technical field of well drilling completion and well repair in the petroleum industry. The bottom plug of the device is arranged at the bottom of an expansion pipe, an expansion cone is arranged in an expanding cavity of the expansion pipe, a hydraulic cylinder mechanism is arranged above the expansion cone, an anchoring mechanism is arranged below the expansion cone, the lower end of a central pipe of the hydraulic cylinder mechanism is hydraulically communicated with the inner cavity of the expansion pipe, a piston is fixedly and hermetically connected with the central pipe, and a hydraulic cylinder sleeve is fixedly connected with the expansion cone; the expansion cone is sleeved with the central tube and is sealed in a sliding way; the lower end of the central tube is connected with an anchoring mechanism. The hydraulic pressure of the power cylinder and the hydraulic pressure of the expansion cone pushed by the traditional technology are overlapped to push the expansion cone together to expand the expansion pipe, so that the pump pressure during operation is greatly reduced, the operation risk is reduced, and the safety of constructors is ensured.
Description
Technical Field
The invention relates to the technical field of well drilling completion and well repair in petroleum industry, in particular to a composite force-application expansion pipe device and an operation method thereof.
Background
The physical expansion pipe technology developed in the 90 s of the last century plays an important role in the technical fields of drilling, completion and workover.
The original expansion pipe technology utilizes hydraulic pressure to push the expansion cone, and simultaneously, the lifting force of the drill rod to the expansion cone is overlapped to complete the expansion operation.
The Chinese patent, application number 201010106783.3 and application date 2010.02.03 disclose a device and a method for repairing damaged casing by using an expansion pipe, wherein the device is characterized in that a set of power cylinder is arranged at the upper part of the expansion pipe, an expansion cone is arranged at the lower part of the expansion pipe, a clamping and hanging positioning mechanism is arranged below the expansion cone, the upper part of the power cylinder of the device presses the expansion pipe, a central pipe of the power cylinder downwards pulls the clamping and hanging positioning mechanism, and the expansion cone is pulled upwards by the pulling force of the power cylinder to expand the expansion pipe. The clamping and hanging positioning mechanism can clamp the central tube unidirectionally, so that a downward upward thrust is provided for the expansion cone, and the requirement of upward lifting of multiple strokes of the power cylinder can be met.
Chinese patent, application No. 201310220019.2, filing date 2013.06.05, "an expansion process method and tool system for an expansion pipe" discloses an expansion pipe device, wherein a power cylinder is connected below an expansion cone, and a slip anchoring device is connected below the power cylinder. In operation, the slip anchor is snapped onto the casing. The power cylinder pushes up the expansion cone by hydraulic pressure and pushes down the slip anchoring device.
The two expansion pipe technologies use hydraulic force of a power cylinder to push an expansion cone to expand a sleeve, and when the strength of the expanded pipe is high and the required expansion force is large, the hydraulic force of the operation is high only by the force of the power cylinder, so that the safety risk exists.
Disclosure of Invention
In order to solve the technical problems, the invention provides the composite force-application expansion pipe device capable of greatly reducing the pumping pressure of the ground hydraulic pump during operation and the operation method thereof, thereby reducing the operation risk and ensuring the safety of constructors.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the composite force-applying expansion pipe device is characterized in that a bottom plug is arranged at the bottom of an expansion pipe, the bottom plug is fixedly and hermetically connected with the expansion pipe, an expansion cavity is arranged at the lower part of the expansion pipe, an expansion cone is arranged in the expansion cavity, a hydraulic cylinder mechanism is arranged above the expansion cone, an anchoring mechanism is arranged below the expansion cone, and a central pipe of the hydraulic cylinder mechanism passes through the expansion cone and is fixedly connected with the anchoring mechanism; the expansion cone is sleeved with the central tube and is in sliding seal, the lower end of the central tube is in hydraulic communication with the inner cavity of the expansion tube, and the hydraulic cylinder sleeve of the hydraulic cylinder mechanism is fixedly connected with the expansion cone.
Preferably, the anchoring mechanism is a slip anchoring mechanism, and the slip anchoring mechanism is a T-shaped groove type slip anchoring mechanism. The slip anchoring mechanism can also be a slip friction block integrated slip anchoring mechanism.
Preferably, the anchoring mechanism may also be a hydraulic anchor anchoring mechanism.
The operation method of the composite force-application expansion pipe device comprises the following operation steps of,
a. the composite force-applying expansion pipe device is lowered to a fracture position of a downhole casing or an open hole inner well by using a working pipe column;
b. the upper end of the operation pipe column is connected with a hydraulic pump on the ground;
c. starting a hydraulic pump to enable hydraulic pressure in a central tube of the composite force-application expansion tube device to rise, pushing an expansion cone to expand the expansion tube upwards, and enabling a hydraulic cylinder mechanism to finish an uplink stroke;
d. stopping the hydraulic pump, and removing hydraulic pressure in the central tube of the composite force-application expansion tube device;
e. lifting the operation pipe column to enable the hydraulic cylinder mechanism to ascend by one stroke;
f. repeating the steps c, d and e until the expansion operation of all expansion pipes is completed.
The hydraulic pressure of the power cylinder and the hydraulic pressure of the expansion cone pushed by the traditional technology are overlapped to push the expansion cone together to expand the expansion pipe, so that the pump pressure during operation is greatly reduced, the operation risk is reduced, and the safety of constructors is ensured.
Drawings
The invention, together with a further understanding of the many of its attendant advantages, will be best understood by reference to the following detailed description, when considered in conjunction with the accompanying drawings, which are included to provide a further understanding of the invention, and the accompanying drawings, illustrate and do not constitute a limitation on the invention, and wherein:
FIG. 1 is a schematic diagram of a composite force-applying expansion pipe device, wherein a hydraulic cylinder mechanism is a primary hydraulic cylinder, and an anchoring mechanism is a slip anchoring mechanism.
Fig. 2 is a schematic structural diagram of a composite force-applying expansion pipe device, wherein the hydraulic cylinder mechanism is a secondary hydraulic cylinder, and the anchoring mechanism is a slip anchoring mechanism.
FIG. 3 is a schematic structural view of a composite force-applying expansion pipe device, and an auxiliary sealing mechanism cup packer is arranged below an expansion cone.
FIG. 4 is a schematic structural view of a composite force-applying expansion pipe device, and an auxiliary sealing mechanism sealing ring baffle ring is arranged below an expansion cone.
Fig. 5 is a schematic illustration of the construction of a "T" groove-type slip anchoring mechanism.
FIG. 6 is a schematic illustration of a slip friction block integrated slip anchoring mechanism.
FIG. 7 is a schematic view of a composite force-applied expansion pipe device, wherein the anchoring mechanism is a hydraulic anchor anchoring mechanism, and the restrictor is a throttling water nozzle.
Fig. 8 is a schematic structural view of a hydraulic anchor.
FIG. 9 is a schematic structural view of a composite force-applied expansion pipe device, wherein the anchoring mechanism is a hydraulic anchor anchoring mechanism, and the restrictor is a throttle valve.
Detailed Description
In the description of the present specification, the above-mentioned upper and lower positional relationships are the same as those shown in the drawings, and are also the positional relationships between the members when the tool of the present invention is applied to a vertical well.
The composite force-applied expansion pipe device comprises an expansion pipe 2, an expansion cone 4 and a bottom plug 6, as shown in fig. 1. The lower part of the expansion pipe 2 is provided with an expanding cavity, and the expansion cone 4 is arranged in the expanding cavity. The bottom plug 6 is arranged at the bottom of the expansion pipe 2, and the bottom plug 6 is fixedly and hermetically connected with the expansion pipe 2. The fixed connection described herein and elsewhere in this specification may be threaded or welded; the fixed and sealed connection can be a sealed threaded connection, such as petroleum oil pipe threads, a non-sealed threaded and sealed ring connection, or welding.
The central tube 1 is externally provided with a liquid cylinder sleeve 31 and a piston 32, the central tube 1, the liquid cylinder sleeve 31 and the piston 32 jointly form a liquid cylinder mechanism 3, the piston 32 is fixedly and hermetically connected with the central tube 1, the liquid cylinder sleeve 31 is sleeved with the central tube 1 to form a first sliding sealing surface, the liquid cylinder sleeve 31 is sleeved with the piston 32 to form a second sliding sealing surface, the first sliding sealing surface and the second sliding sealing surface have diameter differences, and a liquid inlet 7 is formed on the side wall of the central tube 1 between the liquid cylinder sleeve 31 and the piston 32.
The lower end of the central tube 1 is in hydraulic communication with the inner cavity of the expansion tube 2, namely, the lower end of the central tube 1 is provided with an opening which is communicated with the inner cavity formed by the expansion tube 2 and the bottom plug 6.
The liquid cylinder sleeve 31 is fixedly connected with the expansion cone 4; the expansion cone 4 is sleeved with the central tube 1 and is sealed in a sliding way; the lower end of the central tube 1 is fixedly connected with an anchoring mechanism 5.
In order to facilitate the discharge of liquid, a liquid outlet 8 may be provided in the side wall of the cylinder jacket 31 below the piston 32.
Fig. 1 shows a single-stage hydraulic cylinder mechanism formed by a primary hydraulic cylinder sleeve and a primary piston, and the hydraulic cylinder mechanism can be a multi-stage hydraulic cylinder mechanism formed by a multi-stage hydraulic cylinder sleeve and a multi-stage piston. Referring to fig. 2, a secondary hydraulic cylinder mechanism is shown, which includes a primary hydraulic cylinder mechanism 201 and a secondary hydraulic cylinder mechanism 202, wherein a secondary hydraulic cylinder sleeve is connected together, and other connecting elements are the same as those of the single-stage hydraulic cylinder mechanism. The connection mode of the hydraulic cylinder mechanisms with more than three stages is the same as that of the hydraulic cylinder mechanisms with two stages.
The anchoring mechanism 5 is a slip anchoring mechanism, as shown in fig. 5, the slip anchoring mechanism is a T-shaped groove type slip anchoring mechanism, which is a commonly used anchoring mechanism on an underground 211 type or 221 type packer in an oil field, and is also called a dovetail groove type slip anchoring mechanism, and comprises a lower central pipe 56, an anchoring cone 51, a slip 52, a slip support 53, a spring 54 and a blocking cap 55, wherein the anchoring cone 51, the slip support 53, the spring 54 and the blocking cap 55 are sequentially sleeved outside the lower central pipe 56 from top to bottom, and the anchoring cone 51 and the blocking cap 55 are fixedly connected with the lower central pipe 56; the anchoring cone 51 and the slip support 53 are provided with T-shaped grooves on the outer circumference, and the slips 52 are installed in the T-shaped grooves.
The spring 54 may be a disc spring or a cylindrical helical compression spring.
It can be seen from the above description of the present invention that the composite force-applied expansion pipe device of the present invention comprises an expansion pipe, a bottom plug, an expansion cone, a hydraulic cylinder mechanism and an anchoring mechanism. An expanding cavity is arranged on the lower part of the expansion pipe and above the bottom plug, and an expansion cone is arranged in the expanding cavity; a hydraulic cylinder mechanism is arranged above the expansion cone, and an anchoring mechanism is arranged below the expansion cone. The central tube passes through the expansion cone from the center, is connected with the hydraulic cylinder mechanism, is connected with the anchoring mechanism, and is a part of the hydraulic cylinder mechanism and a part of the anchoring mechanism; the cylinder sleeve of the hydraulic cylinder mechanism is connected with the expansion cone, and the piston of the hydraulic cylinder mechanism is connected with the anchoring mechanism through the lower part of the central tube. When the anchoring mechanism is pushed down, the anchoring mechanism is clamped on the inner wall of the expansion pipe through slips, and when the anchoring mechanism is lifted up, the anchoring mechanism releases anchoring and moves upwards along the expansion pipe. Under the action of hydraulic pressure, the hydraulic cylinder mechanism pushes down the anchoring mechanism to clamp the expansion pipe, and the counterforce of the hydraulic cylinder mechanism pulls up the expansion cone to move upwards through the hydraulic cylinder sleeve, so that the expansion of the sleeve is realized. The expansion cone and the central tube form sliding seal, the periphery of the expansion cone and the expansion tube also form a sealing surface, and hydraulic pressure acts on the lower end of the expansion cone to push the expansion cone to move upwards. The expansion cone is simultaneously subjected to the upward pulling force of the hydraulic cylinder mechanism and the upward pushing force of the hydraulic pressure, and the two forces are combined, so that compared with the hydraulic pressure of a single expansion operation, the expansion cone is greatly reduced.
Based on the basic thought and principle of the design, the slip anchoring mechanism can also be a slip friction block integrated slip anchoring mechanism, which is another anchoring mechanism commonly used on a 211 type or 221 type packer in an oil field. As shown in fig. 6, the slip friction block integrated slip anchoring mechanism includes a lower base pipe 56, a cone 61, friction slips 62, a snap ring 63, a small spring 64, a slip shoe 65, and a retainer ring 66. The cone 61, the slip collet 65 and the baffle ring 66 are sequentially sleeved outside the lower central tube 56 from top to bottom, and the cone 61 and the baffle ring 66 are fixedly connected with the lower central tube 56; the slip collet 65 is provided with a J-shaped annular groove with a cross section, the lower end of the friction slip 62 is arranged in the J-shaped annular groove, the small spring 64 is transversely arranged between the friction slip 62 and the slip collet 65, and the clamping ring 63 is sleeved on the periphery of the friction slip 62.
The anchoring means 5 may also be hydraulic anchor anchoring means based on the basic ideas and principles of the above design. As shown in fig. 7 and 8, the hydraulic anchor anchoring mechanism includes a hydraulic anchor 71 and a restrictor 73 attached to a lower portion thereof. The restrictor 73 may be a restrictor tap 74. The throttle water nozzle 74 is that a throttle hole 75 is arranged on a plate, and is commonly called a throttle hole plate. When the restrictor creates a restriction pressure differential, the anchor 72 anchors against the inner wall of the expansion vessel. Of course, when the diameter of the orifice 75 of the throttle nozzle 74 is 0 at a minimum, the anchoring force of the anchor 72 is maximized.
The throttle 73 may also be a throttle valve 80, as shown in fig. 9, the throttle valve 83 is connected with a hydraulic anchor, the throttle valve 83 is provided with an axial shoulder hole, the ball 81 is installed in the shoulder hole, the plug 84 is installed at the lower part of the shoulder hole, and the valve spring 82 is installed between the plug 84 and the ball 81. The choke 80 may also be a choke water distributor commonly used in oilfield downhole water injection strings.
In order to improve the sealing effect of the expansion cone in the expansion uplink process, an auxiliary sealing mechanism is sleeved outside the central tube 1 below the expansion cone 4. As shown in fig. 3, the auxiliary sealing mechanism is a cup packer 311. Cup packers are one of the tools commonly used downhole in oil fields. As shown in fig. 4, the auxiliary sealing mechanism may also be a sealing ring baffle ring, that is, a sealing ring 411 is arranged on the periphery of the expansion cone 4.
The composite force-application expansion pipe device is connected with the operation pipe column through the central pipe. The operation steps are as follows:
a. the composite force-applying expansion pipe device is lowered to a fracture position of a downhole casing or an open hole inner well by using a working pipe column;
b. the upper end of the operation pipe column is connected with a hydraulic pump on the ground;
c. starting a hydraulic pump to enable hydraulic pressure in a central tube of the composite force-application expansion tube device to rise, pushing an expansion cone to expand the expansion tube upwards, and enabling a hydraulic cylinder mechanism to finish an uplink stroke;
d. stopping the hydraulic pump, and removing hydraulic pressure in the central tube of the composite force-application expansion tube device;
e. lifting the operation pipe column to enable the hydraulic cylinder mechanism to ascend by one stroke;
f. repeating the steps c, d and e until the expansion operation of all expansion pipes is completed.
It will be apparent that many modifications and variations are possible within the scope of the invention, as will be apparent to those skilled in the art based upon the teachings herein.
Claims (15)
1. The composite force-applying expansion pipe device is characterized in that a hydraulic cylinder mechanism (3) is arranged above the expansion cone (4), an anchoring mechanism (5) is arranged below the expansion cone (4), and a central pipe (1) of the hydraulic cylinder mechanism (3) passes through the expansion cone (4) to be fixedly connected with the anchoring mechanism (5); the expansion cone (4) is sleeved with the central tube (1) and is in sliding seal, the lower end of the central tube (1) is in hydraulic communication with the inner cavity of the expansion tube (2), and a hydraulic cylinder sleeve (31) of the hydraulic cylinder mechanism (3) is fixedly connected with the expansion cone (4); the hydraulic cylinder mechanism (3) is composed of a central tube (1), a hydraulic cylinder sleeve (31) and a piston (32); the central tube (1) is provided with a liquid cylinder sleeve (31) and a piston (32), wherein the piston (32) is fixedly and hermetically connected with the central tube (1), the liquid cylinder sleeve (31) is sleeved with the central tube (1) and forms a first sliding sealing surface, the liquid cylinder sleeve (31) is sleeved with the piston (32) and forms a second sliding sealing surface, the first sliding sealing surface and the second sliding sealing surface have a diameter difference, and a liquid inlet hole (7) is formed in the side wall of the central tube (1) between the liquid cylinder sleeve (31) and the piston (32).
2. A composite force-applied expansion pipe device according to claim 1, wherein the hydraulic cylinder mechanism (3) has two or more stages.
3. A composite force-applied expansion pipe device according to claim 1, characterized in that the anchoring means (5) are slip anchoring means.
4. The composite force-applying expansion pipe device according to claim 3, wherein the slip anchoring mechanism is a T-shaped groove type slip anchoring mechanism and comprises a lower central pipe (56), an anchoring cone (51), slips (52), a slip support (53), a spring (54) and a blocking cap (55), the anchoring cone (51), the slip support (53), the spring (54) and the blocking cap (55) are sequentially sleeved outside the lower central pipe (56) from top to bottom, and the anchoring cone (51) and the blocking cap (55) are fixedly connected with the lower central pipe; the anchoring cone (51) and the slip support (53) are respectively provided with a T-shaped groove, and the slip (52) is arranged in the T-shaped groove.
5. A composite force expansion pipe device according to claim 4, characterized in that the spring (54) is a disc spring or a cylindrical helical compression spring.
6. The composite force-applying expansion pipe device according to claim 3, wherein the slip anchoring mechanism is a slip friction block integrated slip anchoring mechanism and comprises a lower central pipe (56), a cone (61), a friction slip (62), a clamping ring (63), a small spring (64), a slip collet (65) and a baffle ring (66), the cone (61), the slip collet (65) and the baffle ring (66) are sequentially sleeved outside the lower central pipe (56) from top to bottom, and the cone (61) and the baffle ring (66) are fixedly connected with the lower central pipe; the slip collet (65) is provided with a J-shaped annular groove in cross section, the lower end of the friction slip (62) is arranged in the J-shaped annular groove, the small spring (64) is transversely arranged between the friction slip (62) and the slip collet (65), and the clamping ring (63) is sleeved on the periphery of the friction slip (62).
7. A composite force-applied expansion pipe device according to claim 1, characterized in that the anchoring means (5) is a hydraulic anchor anchoring means.
8. The composite force-applied expansion pipe device according to claim 7, wherein the hydraulic anchor anchoring mechanism comprises a hydraulic anchor (71) and a restrictor (73) connected to the lower portion of the hydraulic anchor (71).
9. The composite force-applied expansion pipe device according to claim 8, wherein the throttle (73) is a throttle water nozzle (74).
10. A composite force-applied expansion pipe device according to claim 8, characterized in that the throttle (73) is a throttle valve (80).
11. The composite force-applied expansion pipe device according to claim 1, wherein an auxiliary sealing mechanism is sleeved outside the central pipe (1) below the expansion cone (4).
12. The composite force-applied expansion pipe device according to claim 11, wherein the auxiliary sealing mechanism is a cup packer (311).
13. The composite force-applied expansion pipe device according to claim 11, wherein said auxiliary sealing mechanism is a seal ring retainer.
14. A method of operating a composite force expansion pipe device, characterized in that it comprises the composite force expansion pipe device according to any of claims 1 to 13.
15. The method of claim 14, wherein the steps of a, lowering the composite force expansion pipe device to a casing fracture or an open hole well with a working string; b. the upper end of the operation pipe column is connected with a hydraulic pump on the ground; c. starting a hydraulic pump to enable hydraulic pressure in a central tube of the composite force-application expansion tube device to rise, pushing an expansion cone to expand the expansion tube upwards, and enabling a hydraulic cylinder mechanism to finish an uplink stroke; d. stopping the hydraulic pump, and removing hydraulic pressure in the central tube of the composite force-application expansion tube device; e. lifting the operation pipe column to enable the hydraulic cylinder mechanism to ascend by one stroke; f. repeating the steps c, d and e until the expansion operation of all expansion pipes is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710083640.7A CN106703732B (en) | 2017-02-16 | 2017-02-16 | Composite force-application expansion pipe device and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710083640.7A CN106703732B (en) | 2017-02-16 | 2017-02-16 | Composite force-application expansion pipe device and operation method thereof |
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| CN106703732A CN106703732A (en) | 2017-05-24 |
| CN106703732B true CN106703732B (en) | 2023-12-01 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288573A (en) * | 2017-07-18 | 2017-10-24 | 中国石油化工股份有限公司 | Automatic hydraulic expands guard system and its operating method |
| CN108252673B (en) * | 2018-03-12 | 2019-02-19 | 刘屹凡 | A kind of petroleum casing pipe chemical method prosthetic device |
| CN111140196B (en) * | 2018-03-12 | 2021-11-09 | 盐城曼达管业有限公司 | Petroleum pipe repairing method |
| CN109538149B (en) * | 2018-11-01 | 2021-06-08 | 中国石油集团渤海钻探工程有限公司 | Easy-to-release thin-wall large-drift-diameter expansion pipe patching device |
| CN114135243B (en) * | 2021-11-30 | 2023-06-02 | 西南石油大学 | Failure-preventing composite expansion tool for equal-well-diameter expansion pipe |
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| CN106703732A (en) | 2017-05-24 |
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