CN110439489B - Water injection anti-jacking slip anchor - Google Patents
Water injection anti-jacking slip anchor Download PDFInfo
- Publication number
- CN110439489B CN110439489B CN201910879052.3A CN201910879052A CN110439489B CN 110439489 B CN110439489 B CN 110439489B CN 201910879052 A CN201910879052 A CN 201910879052A CN 110439489 B CN110439489 B CN 110439489B
- Authority
- CN
- China
- Prior art keywords
- slip
- piston
- lower joint
- joint
- sleeve
- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 238000002347 injection Methods 0.000 title claims abstract description 7
- 239000007924 injection Substances 0.000 title claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims description 20
- 238000004873 anchoring Methods 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004576 sand 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
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
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)
- Piles And Underground Anchors (AREA)
- Actuator (AREA)
Abstract
The invention discloses a water injection anti-jacking slip anchor which comprises an upper joint, slip teeth, a slip seat, a lower joint and a piston. The lower end of the upper joint is in threaded connection with the central pipe, the slip teeth are sleeved outside the central pipe, the slip teeth are matched with the conical surface of the upper joint, and the central pipe is provided with a liquid inlet; the slip seat is located on the outer wall of the central pipe, the lower end of the slip seat is connected with a cylinder sleeve in a threaded manner, the lower end of the cylinder sleeve is provided with a baffle ring, and the lower end of the slip seat is matched with the conical surface of the upper end of the slip seat; the baffle ring is sleeved on the surface of the lower joint and is in threaded connection with the lower joint, a through hole is formed in the upper end of the lower joint, and a pin block used for detachably connecting the lower joint with the central tube is arranged in the through hole; the piston sleeve is sleeved outside the upper end of the lower joint and is connected with the lower joint through a pin, and the pin block and the through hole are positioned in the piston sleeve and are limited through the piston sleeve. The slip tooth resetting device is simple and reasonable in structure, safe and stable, and can effectively prevent slip tooth resetting failure.
Description
Technical Field
The invention relates to an underground matching tool for petroleum exploitation, in particular to a water injection anti-jacking slip anchor.
Background
The downhole hydraulic anchoring tool is a tool for anchoring by applying hydraulic pressure difference between the inside and outside of a tubular column, and is widely used in field production operations of oil and gas fields such as plugging removal, reservoir reconstruction, downhole operation and the like. The hydraulic anchor is one of important components for realizing the positioning function of the oil testing packer, and the working process is as follows: if the pressure in the pipe is greater than the annular pressure, the hydraulic anchor piston is started to clamp the hydraulic anchor on the inner wall of the sleeve, so that the reliable anchoring of the pipe column is realized, and the upward axial movement of the pipe column is prevented. In terms of structural composition, the hydraulic anchor generally consists of an anchor body, a pressing plate, a fixing screw, a return spring, an anchor jaw piston and the like, and has the functions of only bearing a certain axial upward pushing force of a pipe column and not bearing the axial pressure of the pipe column. The existing slip anchor is of a spring slip tooth structure, a reset spring is arranged at the lower part of the slip tooth, the spring space of the hydraulic anchor is smaller due to structural limitation, the size of the installed spring is limited by a smaller spring, the installed spring is sensitive to pressure difference, and meanwhile, the anchor jaw retraction force provided by the spring is smaller, so that the anchor jaw of the hydraulic anchor is difficult to retract; when the hydraulic anchor is used, the spring space of the hydraulic anchor is directly exposed and communicated with the oil sleeve annulus, sand grains, dirt particles, oil sludge and other impurities carried by the fluid in the well easily enter and accumulate in the spring space, so that the spring is invalid, and the anchored slips cannot be retracted and are blocked. In this way, slip teeth are prone to failure in resetting during long-term use.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art, and provides a safe and stable water injection anti-jacking slip anchor which can effectively prevent slip teeth from resetting and failing.
The technical scheme of the invention is as follows: water injection anti-jacking slip anchor includes:
The lower end of the upper joint is in threaded connection with the central pipe, and an inverted conical matching surface is arranged on the outer surface of the lower end of the upper joint;
the slip teeth are sleeved outside the central pipe, the inner surface of the upper end of each slip tooth is matched with the lower end of the upper joint through an inverted conical matching surface, and a liquid inlet hole is formed in the central pipe;
The slip seat is located on the outer wall of the central pipe, the lower end of the slip seat is connected with a cylinder sleeve in a threaded manner, a stop ring for limiting the cylinder sleeve is arranged at the lower end of the cylinder sleeve, and the lower end of the slip seat is matched with the conical surface of the upper end of the slip seat;
The upper end of the lower joint is positioned in an annular inner cavity formed by the central tube and the cylinder sleeve, the baffle ring is sleeved on the surface of the lower joint and is in threaded connection with the lower joint, a through hole communicated with the inner cavity is formed in the upper end of the lower joint, and a pin block used for detachably connecting the lower joint with the central tube is arranged in the through hole; the slip seat, the central tube, the cylinder sleeve and the lower joint form an annular piston cavity, and the liquid inlet hole is communicated with the piston cavity;
The piston comprises a piston body and a hollow piston sleeve, wherein the piston body is arranged in a piston cavity and is in contact with the inner wall of the piston cavity, the hollow piston sleeve is arranged at the lower end of the piston body, the piston sleeve is sleeved on the outer side of the upper end of the lower joint and is connected with the lower joint through a pin, and the pin block and the through hole are positioned in the piston sleeve and are limited through the piston sleeve.
Preferably, the liquid inlet holes and the pin blocks are multiple, the radial size of the pin blocks is smaller than that of the piston cavity, and the central tube is provided with a groove for inserting the pin blocks.
Preferably, the position of the groove corresponds to the position of the liquid inlet hole.
Preferably, the grooves and the liquid inlet holes are staggered; the inner surface of the groove is an inclined plane, and the shape of the end part of the pin block in the central tube is matched with the groove.
Preferably, the inner surface and the outer surface of the piston body are respectively provided with a sealing ring in sealing fit with the central tube and the cylinder sleeve.
Preferably, the outer surface of the central tube is axially provided with a limiting groove with a length, the limiting groove is positioned below the liquid inlet, and the lower joint is fixedly provided with a limiting key which moves up and down along the limiting groove.
Preferably, sealing devices are arranged between the central pipe and the lower joint and between the lower joint and the cylinder sleeve, and the sealing devices are located below the limiting grooves.
Preferably, a shoulder is arranged at the upper end of the lower joint, the lower end of the piston sleeve is seated on the shoulder, and the through hole is arranged at the shoulder.
Preferably, the lower end of the cylinder sleeve is provided with a step extending towards the center direction, the diameter of the step is smaller than the inner diameter of the cylinder sleeve, and the lower joint is seated on the step through a bulge arranged on the outer surface.
Compared with the prior art, the invention has the following advantages: the invention has reasonable and compact structure and convenient use, can utilize the structures of the slip teeth, the slip seat, the piston, the pin block, the cylinder sleeve and the like to enable the piston to ascend, thereby enabling the pin block to fall off to unlock the central tube and the lower joint, and then the central tube is lowered after unlocking, so that the slip anchoring can be realized, and meanwhile, the setting of the setting device can be realized; the liquid pressurization is stopped, the central tube is lifted up, the slip teeth are reset, anchoring can be relieved, the problem that the slip teeth are reset and lose efficacy due to springs can be effectively prevented by the structure, and the slip is safe and reliable.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a partial schematic view of the center tube after unlocking the lower joint;
In the figure: 1. the upper joint, 2, slip teeth, 3, slip seats, 4, lower joint, 5, central tube, 6, cylinder sleeve, 7, piston, 71, piston body, 72, piston sleeve, 8, liquid inlet, 9, baffle ring, 10, piston cavity, 11, through hole, 12, pin block, 13, pin, 14, shoulder, 15, sealing ring, 16, limit groove, 17, limit key, 18, step, 19, groove.
Detailed Description
The invention is further illustrated by the following examples in connection with the accompanying drawings.
Example 1
Referring to fig. 1, a water flooding anti-jack slip anchor, comprising: an upper joint 1, slip teeth 2, slip seats 3, a lower joint 4, a central tube 5, a cylinder sleeve 6 and a piston 7.
The lower end of the upper joint 1 is in threaded connection with the central pipe 5, and an inverted conical matching surface is arranged on the outer surface of the lower end of the upper joint 1; the slip teeth 2 are sleeved on the outer side of the central pipe 5, the inner surface of the upper end of the slip teeth 2 is matched with the lower end of the upper joint 1 through an inverted conical matching surface, and the slip teeth 2 can be opened under the compression of the upper joint 1, so that an anchoring effect is achieved. The central tube 5 is provided with a liquid inlet hole 8, the liquid inlet hole 8 is communicated with the piston cavity, and when the pressure is applied, liquid enters the piston cavity 10 through the liquid inlet hole 8.
The outer wall of the central tube 5 is provided with a bulge, the slip seat 3 is located on the outer wall of the central tube 5 through the bulge, the lower end of the slip teeth 2 is matched with the conical surface at the upper end of the slip seat 3, the conical surface is respectively arranged at the upper end and the lower end of the slip teeth 2 to be matched, and the upper end and the lower end of the slip teeth 2 can be simultaneously outwards expanded after pressure is applied to the slip teeth 2, so that the anchoring effect is better achieved; the cylinder liner 6 threaded connection is in the below of slips seat 3, and lower joint 4 surface threaded connection has baffle ring 9, and baffle ring 9 is fixed in the cylinder liner 6 lower extreme for spacing cylinder liner 6, lower joint 4 has connected it together with cylinder liner 6 and slips seat 3 through baffle ring 9 like this. At this time, the outer surfaces of the upper joint 1, the slip bowl 2, the slip bowl 3, the cylinder sleeve 6 and the piston 7 are flush, and the same outer diameter is maintained so as to be convenient for the pipe column to be lowered.
The slip seat 3, the central tube 5, the cylinder sleeve 6 and the lower joint 4 form an annular piston cavity 10, the upper end of the lower joint 4 and the piston 7 are both positioned in the piston cavity 10, the piston 7 comprises a piston body 71 which is arranged in the piston cavity 10 and is in contact with the inner wall of the piston cavity 10, and a hollow piston sleeve 72 which is arranged at the lower end of the piston body 71, the piston sleeve 72 is sleeved outside the upper end of the lower joint 4 and is connected with the lower joint 4 through a pin 13, so that the lower joint 4 and the piston 7 can be fixed together, and the pin 13 can be sheared off only when the pressure is excessive, so that the piston 7 can move up and down. The upper end of the lower joint 4 is provided with a through hole 11 communicated with the inner cavity, a pin block 12 is movably arranged in the through hole 11, the pin block 12 and the through hole 11 are positioned in a piston sleeve 72 and are limited through the piston sleeve 72, the upper end of the lower joint 4 is provided with a shoulder 14, the lower end of the piston sleeve 72 is seated on the shoulder 14, and the through hole 11 is arranged at the shoulder 14. One end of the pin block 12 extends out of the through hole 11 and is positioned in the groove 19 of the central tube 5, and as the position of the liquid inlet hole 8 corresponds to the position of the through hole 11, when liquid enters the piston cavity 10 through a gap under the action of pressure, the pin 13 is sheared under the action of certain pressure and the piston 7 is pushed to move upwards, at the moment, the piston sleeve 72 is separated from the shoulder 14 to continue to move upwards until the position separated from the through hole 11, after the pin block 12 loses the blocking of the piston sleeve 72, the pin block moves towards the cylinder sleeve 6 under the action of the liquid pressure until the pin block is separated from the groove 19, at the moment, the central tube 5 is unlocked from the lower connector 4, namely, the central tube 5 can move up and down relative to the lower connector 4, as shown in fig. 2.
The liquid inlet holes 8 and the pin blocks 12 are multiple, and the radial dimension of the pin blocks 12 is smaller than that of the piston cavity 10, so that the pin blocks 12 can be thoroughly separated from the grooves 19.
Injecting liquid into the central tube 5 for pressurization, enabling the liquid to enter the piston cavity 10 through the liquid inlet hole 8, enabling the pin 13 between the piston sleeve 72 and the lower joint 4 to be sheared along with pressure increase, enabling the piston 7 to be pushed to move upwards in the piston cavity 10 by continuing pressurization, enabling the piston sleeve 72 to be separated from the shoulder 14 upwards, enabling the pin block 12 to move towards the cylinder sleeve 6 along the inner wall of the through hole 11 under the action of liquid pressure after the pin block 12 loses the blocking of the piston sleeve 72 when the piston sleeve 72 is separated from the through hole 11, and enabling the central tube 5 to be separated from the lower joint 4 for unlocking when the pin block 12 is separated from the groove 19 under the action of liquid pressure; after unlocking, the central tube 5 is lowered, the slip teeth 2 are extruded to expand outwards along the conical surface under the action of the reverse conical matching surface of the upper joint 1, and meanwhile, the lower ends of the slip teeth 2 are expanded through matching with the conical surface of the slip seat 3 until the slip teeth 2 are anchored with the sleeve, and meanwhile, the setting device can be set; the liquid pressurization is stopped, the central tube 5 is lifted up, the slip teeth 2 are reset, anchoring can be released, and the structure can effectively prevent the resetting failure of the slip teeth, so that the slip teeth are safe and reliable.
Example two
The others are substantially identical to the first embodiment except that: the position of the groove 19 is staggered with the liquid inlet holes 8, the inner surface of the groove 19 is an inclined surface, the end shape of the pin block 12 positioned in the central tube 5 is matched with the groove 19, and through the inclined surface matching, after the pin block 12 loses the blocking of the piston sleeve 72, the pin block can rapidly fall off from the groove 19, so that the central tube 5 and the lower joint 4 are unlocked. And the liquid inlet holes 8 and the pin blocks 12 are multiple, so that quick anchoring can be realized.
In addition, in both embodiments, sealing rings 15 are provided on the inner and outer surfaces of the piston body 71, which sealing rings are in sealing engagement with the central tube 5 and the cylinder liner 6, respectively.
The outer surface of the central tube 5 is also provided with a limiting groove 16 with a length in the axial direction, the limiting groove 16 is positioned below the liquid inlet hole 8, and a limiting key 17 which moves up and down along the limiting groove 16 is fixedly arranged on the lower joint 4, so that when the central tube 5 is placed down, the lowering distance and the lifting distance of the central tube can be limited through the cooperation of the limiting key 17 and the limiting groove 16, and the central tube is safe and reliable.
Sealing devices are arranged between the central pipe 5 and the lower joint 4 and between the lower joint 4 and the cylinder sleeve 6, the sealing devices are also multi-channel sealing rings, the sealing devices are positioned below the limiting grooves 16, and the piston cavity 10 can be always in a sealing state through the upper sealing rings 15 and the lower sealing rings 15 and the sealing devices.
The lower end of the cylinder sleeve 6 is provided with a step 18 extending towards the circle center direction, the diameter of the step 18 is smaller than the inner diameter of the cylinder sleeve 6, the lower joint 4 is seated on the step 18 through a bulge arranged on the outer surface, and the step 18 can play a role in positioning.
The slip tooth reset device is simple and compact in structure, the reset spring at the bottom of the slip tooth is omitted, the problem that spring failure is caused by clamping of oil sludge and the like can be prevented, and therefore safety and stability of slip tooth reset are guaranteed.
The present invention is not limited to the above-described embodiments, and various changes may be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the contents after the changes still fall within the scope of the present invention.
Claims (6)
1. The slip anchor is prevented propping up in water injection, its characterized in that includes:
The lower end of the upper joint is in threaded connection with the central pipe, and an inverted conical matching surface is arranged on the outer surface of the lower end of the upper joint;
the slip teeth are sleeved outside the central pipe, the inner surface of the upper end of each slip tooth is matched with the lower end of the upper joint through an inverted conical matching surface, and a liquid inlet hole is formed in the central pipe;
The slip seat is located on the outer wall of the central pipe, the lower end of the slip seat is connected with a cylinder sleeve in a threaded manner, a stop ring used for limiting the cylinder sleeve is arranged at the lower end of the cylinder sleeve, and the lower end of the slip seat is matched with the conical surface of the upper end of the slip seat;
The upper end of the lower joint is positioned in an annular inner cavity formed by the central tube and the cylinder sleeve, the baffle ring is sleeved on the surface of the lower joint and is in threaded connection with the lower joint, a through hole communicated with the inner cavity is formed in the upper end of the lower joint, and a pin block used for detachably connecting the lower joint with the central tube is arranged in the through hole; the slip seat, the central tube, the cylinder sleeve and the lower joint form an annular piston cavity, and the liquid inlet hole is communicated with the piston cavity;
The piston comprises a piston body arranged in the piston cavity and contacted with the inner wall of the piston cavity, and a hollow piston sleeve arranged at the lower end of the piston body, the piston sleeve is sleeved outside the upper end of the lower joint and connected with the lower joint through a pin, and the pin block and the through hole are positioned in the piston sleeve and limited through the piston sleeve;
The outer surface of the central tube is axially provided with a limiting groove with a length, the limiting groove is positioned below the liquid inlet, and the lower joint is fixedly provided with a limiting key which moves up and down along the limiting groove;
The upper end of the lower joint is provided with a shoulder, the lower end of the piston sleeve is seated on the shoulder, and the through hole is arranged at the shoulder;
the lower end of the cylinder sleeve is provided with a step extending towards the direction of the circle center, the diameter of the step is smaller than the inner diameter of the cylinder sleeve, and the lower joint is seated on the step through a bulge arranged on the outer surface.
2. The water flooding anti-jack slip anchor of claim 1, wherein: the liquid inlet holes and the pin blocks are multiple, the radial size of the pin blocks is smaller than that of the piston cavity, and the central tube is provided with a groove for inserting the pin blocks.
3. The water flooding anti-jack slip anchor of claim 2, wherein: the position of the groove corresponds to the position of the liquid inlet hole.
4. The water flooding anti-jack slip anchor of claim 2, wherein: the positions of the grooves and the liquid inlet holes are staggered; the inner surface of the groove is an inclined plane, and the shape of the end part of the pin block in the central tube is matched with the groove.
5. The water flooding anti-jack slip anchor of claim 3 or 4, wherein: and sealing rings which are in sealing fit with the central tube and the cylinder sleeve are respectively arranged on the inner surface and the outer surface of the piston body.
6. The water flooding anti-jack slip anchor of claim 5, wherein: sealing devices are arranged between the central pipe and the lower joint and between the lower joint and the cylinder sleeve, and the sealing devices are located below the limiting grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879052.3A CN110439489B (en) | 2019-09-18 | 2019-09-18 | Water injection anti-jacking slip anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879052.3A CN110439489B (en) | 2019-09-18 | 2019-09-18 | Water injection anti-jacking slip anchor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110439489A CN110439489A (en) | 2019-11-12 |
| CN110439489B true CN110439489B (en) | 2024-08-02 |
Family
ID=68440262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910879052.3A Active CN110439489B (en) | 2019-09-18 | 2019-09-18 | Water injection anti-jacking slip anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110439489B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250649B (en) * | 2020-02-07 | 2023-03-14 | 四川维泰科创石油设备制造有限公司 | Underground plugging system and using method thereof |
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| CN210396676U (en) * | 2019-09-18 | 2020-04-24 | 东营市元捷石油机械有限公司 | Water injection anti-jacking slip anchor |
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| US5586601A (en) * | 1995-04-28 | 1996-12-24 | Camco International Inc. | Mechanism for anchoring well tool |
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| CN202954764U (en) * | 2012-10-24 | 2013-05-29 | 阜宁县宏达石化机械有限公司 | Hydraulic anchor |
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| CN207813539U (en) * | 2017-12-22 | 2018-09-04 | 克拉玛依市红都有限责任公司 | Hydraulic anchoring device |
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| CN110439489A (en) | 2019-11-12 |
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