CN210396676U - Water injection anti-jacking slip anchor - Google Patents
Water injection anti-jacking slip anchor Download PDFInfo
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- CN210396676U CN210396676U CN201921547270.9U CN201921547270U CN210396676U CN 210396676 U CN210396676 U CN 210396676U CN 201921547270 U CN201921547270 U CN 201921547270U CN 210396676 U CN210396676 U CN 210396676U
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Abstract
The utility model discloses a slips anchor is prevented pushing up by water injection, including top connection, slips tooth, slip bowl, lower clutch and piston. The lower end of the upper joint is in threaded connection with the central pipe, the slip insert is sleeved outside the central pipe, the slip insert is matched with the conical surface of the upper joint, and the central pipe is provided with a liquid inlet hole; the slip seat is located on the outer wall of the central pipe, the lower end of the slip seat is in threaded connection with a cylinder sleeve, the lower end of the cylinder sleeve is provided with a baffle ring, and the lower end of the slip tooth 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, the upper end of the lower joint is provided with a through hole, and a pin block for detachably connecting the lower joint and the central pipe is arranged in the through hole; piston sleeve cover is established in the upper end outside of lower clutch and is connected with the lower clutch through the pin, and round pin piece and through-hole are located piston sleeve and carry on spacingly through piston sleeve. The utility model has the advantages of simple and reasonable structure, can prevent effectively that the slips tooth from resetting inefficacy, safe firm.
Description
Technical Field
The invention relates to an underground matched tool for oil exploitation, in particular to a water injection anti-jacking slip anchor.
Background
The anchoring tool of underground water power is a tool for implementing anchoring by applying the difference between the internal water power and the external water power of a pipe column, and is widely used in field production operations of oil and gas fields such as blockage removal, reservoir transformation, underground operation and the like at present. The hydraulic anchor is one of the important parts 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 pipe column is prevented from moving upwards in the axial direction. In terms of structure, the hydraulic anchor generally comprises an anchor body, a pressing plate, a fixing screw, a return spring, an anchor fluke piston and the like, and has the function of bearing only certain axial jacking force of a pipe column and not bearing axial pressure of the pipe column. The slip anchor used at present is of a spring slip insert structure, a return spring is arranged at the lower part of a slip insert and is limited by the structure, the spring space of a hydraulic anchor is small, the size of the arranged spring is limited by a small spring and is sensitive to pressure difference, and meanwhile, the fluke retraction force provided by the spring is small, so that the fluke retraction of the hydraulic anchor is difficult; when the anchor is used, the spring space of the hydraulic anchor is directly exposed and communicated with the oil sleeve annulus, and impurities such as sand, dirt particle blocks, oil sludge and the like carried by fluid in a well easily enter and are accumulated in the spring space to cause the failure of the spring, so that the anchored slip cannot be withdrawn to meet the clamping condition. Therefore, the slip teeth are easy to reset and lose efficacy in the long-time use process.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a safe and stable water injection anti-jacking slip anchor which can effectively prevent the slip teeth from resetting and losing efficacy.
The technical scheme of the invention is as follows: slip anchor is prevented pushing up by water injection includes:
the lower end of the upper joint is in threaded connection with the central pipe, and the outer surface of the lower end of the upper joint is provided with an inverted cone-shaped matching surface;
the slip teeth are sleeved on the outer side of the central pipe, the inner surface of the upper end of each slip tooth is matched with the lower end of the upper connector through an inverted-cone-shaped 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 in threaded connection with a cylinder sleeve, the lower end of the cylinder sleeve is provided with a baffle ring for limiting the cylinder sleeve, and the lower end of the slip tooth 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 pipe 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 and the central pipe is arranged in the through hole; the slip seat, the central pipe, 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, the piston is including setting up the piston body and setting up at the hollow piston sleeve of piston body lower extreme with the contact of piston intracavity wall in the piston cavity, the piston sleeve cover is established in the upper end outside of lower clutch and is connected with the lower clutch through the pin, round pin piece and through-hole are located piston sleeve and carry on spacingly through piston sleeve.
Preferably, the liquid inlet hole and the pin block are both multiple, the radial size of the pin block is smaller than that of the piston cavity, and a groove for inserting the pin block is formed in the central pipe.
Preferably, the position of the groove corresponds to the position of the liquid inlet hole.
Preferably, the positions of the grooves and the liquid inlet holes are arranged in a staggered manner; the inner surface of the groove is an inclined surface, and the shape of the end part of the pin block positioned in the central tube is matched with that of the groove.
Preferably, the inner surface and the outer surface of the piston body are respectively provided with a sealing ring which is in sealing fit with the central pipe and the cylinder sleeve.
Preferably, the outer surface of center tube is equipped with the spacing recess that has length in the axial, spacing recess is located feed liquor hole below, the fixed spacing key that reciprocates along spacing recess that is equipped with on the lower clutch.
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, 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 formed in the shoulder.
Preferably, 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 protrusion arranged on the outer surface.
Compared with the prior art, the invention has the following advantages: the structure is reasonable and compact, the use is convenient, the liquid is pressurized through the liquid inlet hole, and the piston can move upwards by utilizing the structures of the slip teeth, the slip seat, the piston, the pin block, the cylinder sleeve and the like, so that the pin block falls off to unlock the central tube and the lower joint, the central tube is placed after unlocking, the anchoring of the slip can be realized, and meanwhile, the setting of the setting device can be realized; the liquid pressurization is stopped, the central pipe is lifted up, the slip teeth are reset, the anchoring can be removed, the structure can effectively prevent the problem that the slip teeth are reset and fail due to the spring, and the slip ring is safe and reliable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial schematic view of the center tube after unlocking with the lower joint;
in the figure: 1. the slip bowl comprises an upper joint, 2, slip teeth, 3, a slip bowl, 4, a lower joint, 5, a central pipe, 6, a cylinder sleeve, 7, a piston, 71, a piston body, 72, a piston sleeve, 8, a liquid inlet hole, 9, a baffle ring, 10, a piston cavity, 11, a through hole, 12, a pin block, 13, a pin, 14, a shoulder, 15, a sealing ring, 16, a limiting groove, 17, a limiting key, 18, a step, 19 and a groove.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
Example one
Referring to fig. 1, the slip anchor for water injection and anti-jacking comprises: the slip comprises an upper joint 1, slip teeth 2, a slip seat 3, a lower joint 4, a central pipe 5, a cylinder sleeve 6 and a piston 7.
The lower end of the upper connector 1 is in threaded connection with the central pipe 5, and the outer surface of the lower end of the upper connector 1 is provided with an inverted conical matching surface; the slip 2 is sleeved on the outer side of the central tube 5, the inner surface of the upper end of the slip 2 is matched with the lower end of the upper connector 1 through the inverted cone-shaped matching surface, and the slip 2 can be opened under the compression of the upper connector 1, so that the anchoring effect is achieved. A liquid inlet hole 8 is formed in the central pipe 5, the liquid inlet hole 8 is communicated with the piston cavity, and liquid enters the piston cavity 10 through the liquid inlet hole 8 during pressurization.
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 tooth 2 is in conical surface fit with the upper end of the slip seat 3, the upper end and the lower end of the slip tooth 2 are respectively provided with conical surface fit, so that the upper end and the lower end of the slip tooth 2 can be simultaneously expanded outwards after pressure is applied to the slip tooth 2, and the anchoring effect is better achieved; 6 threaded connection of cylinder liner in the below of slip bowl 3, 4 surface threaded connection of lower clutch have fender ring 9, and fender ring 9 is fixed at 6 lower extremes of cylinder liner for carry on spacingly to cylinder liner 6, lower clutch 4 has linked together it with cylinder liner 6 and slip bowl 3 through keeping off ring 9 like this. At this moment, the outer surfaces of the upper joint 1, the slip teeth 2, the slip seat 3, the cylinder sleeve 6 and the piston 7 are flush, and the same outer diameter is kept, so that the pipe column can be conveniently lowered.
Slip seat 3, center tube 5, cylinder liner 6 and lower clutch 4 form annular piston chamber 10, the upper end and the piston 7 of lower clutch 4 all are located piston chamber 10, and piston 7 is including setting up piston body 71 and the hollow piston sleeve 72 of setting in piston body 71 lower extreme with piston chamber 10 inner wall contact in piston chamber 10, piston sleeve 72 cover is established in the upper end outside of lower clutch 4 and is connected with lower clutch 4 through pin 13, can be in the same place lower clutch 4 and piston 7 are fixed like this, only can cut off pin 13 when pressure is too big and realize reciprocating of piston 7. 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 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 located in the groove 19 of the central tube 5, and since the position of the liquid inlet hole 8 corresponds to the position of the through hole 11, after liquid enters through the liquid inlet hole 8, the liquid enters the piston cavity 10 through a gap under the action of pressure, the pin 13 is cut off under the action of certain pressure, the piston 7 is pushed to move upwards, the piston sleeve 72 is separated from the shoulder 14 and continues to move upwards until the position of the through hole 11 is separated, 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, the central tube 5 is unlocked with the lower joint 4 at the moment, namely, the central tube 5 can move up and down relative.
The liquid inlet holes 8 and the pin blocks 12 are all multiple, and the radial size of the pin blocks 12 is smaller than that of the piston cavity 10, so that the pin blocks 12 can be ensured to completely fall off from the grooves 19.
Injecting liquid into the central tube 5 for pressurization, wherein the liquid enters the piston cavity 10 through the liquid inlet hole 8, the pin 13 between the piston sleeve 72 and the lower connector 4 can be sheared along with the increase of the pressure, the piston 7 can be pushed to move upwards in the piston cavity 10 by continuously pressurizing, the piston sleeve 72 is separated from the shoulder 14 to move upwards, when the piston sleeve 72 is separated from the through hole 11, the pin block 12 loses the blocking of the piston sleeve 72, and then under the action of the liquid pressure, the pin block 12 moves towards the cylinder sleeve 6 along the inner wall of the through hole 11 until being separated from the groove 19, and at the moment, the central tube 5 is separated from the lower connector 4 to realize unlocking; the central tube 5 is placed downwards after unlocking, the slip teeth 2 are extruded to expand outwards along the conical surface under the action of the inverted cone-shaped matching surface of the upper connector 1, and meanwhile, the lower ends of the slip teeth 2 are also expanded through matching with the conical surface of the slip seat 3 until the slip teeth 2 are anchored with the sleeve, and meanwhile, setting of the setting device can be achieved; the liquid pressurization is stopped, the central pipe 5 is lifted up, the slip teeth 2 are reset, the anchoring can be removed, the structure can effectively prevent the reset failure of the slip teeth, and the safety and the reliability are realized.
Example two
The other parts are basically the same as the first embodiment, except that: the position of recess 19 and feed liquor hole 8 staggered arrangement, the internal surface of recess 19 is the inclined plane, and the tip shape that the round pin piece 12 is located the center tube 5 cooperatees with recess 19, through this kind of inclined plane cooperation, after the round pin piece 12 loses the blockking of piston sleeve 72, can drop in the recess 19 fast, plays the effect of unblock center tube 5 and lower clutch 4. And the liquid inlet hole 8 and the pin block 12 are both multiple, so that quick anchoring can be realized.
In addition, in the two embodiments, the inner surface and the outer surface of the piston body 71 are respectively provided with a sealing ring 15 which is in sealing fit with the central pipe 5 and the cylinder sleeve 6.
Still be equipped with the spacing recess 16 that has length in the axial at the surface of center tube 5, spacing recess 16 is located the below of feed liquor hole 8, and the fixed spacing key 17 that reciprocates along spacing recess 16 that is equipped with on lower clutch 4 like this, when center tube 5 transfers, through spacing key 17 and spacing recess 16 cooperation, can transfer the distance and lift the distance and carry on spacingly safe and reliable to it.
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 ring 15 and the lower sealing ring 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 resetting device is simple and compact in structure, a resetting spring at the bottom of the slip tooth is omitted, and the problem of spring failure caused by the clamping of oil sludge and the like can be prevented, so that the safety and stability of the resetting of the slip tooth are ensured.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (9)
1. Slip anchor is prevented pushing up by water injection, its characterized in that includes:
the lower end of the upper joint is in threaded connection with the central pipe, and the outer surface of the lower end of the upper joint is provided with an inverted cone-shaped matching surface;
the slip teeth are sleeved on the outer side of the central pipe, the inner surface of the upper end of each slip tooth is matched with the lower end of the upper connector through an inverted-cone-shaped 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 in threaded connection with a cylinder sleeve, the lower end of the cylinder sleeve is provided with a baffle ring for limiting the cylinder sleeve, and the lower end of the slip tooth 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 pipe 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 and the central pipe is arranged in the through hole; the slip seat, the central pipe, 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, the piston is including setting up the piston body and setting up at the hollow piston sleeve of piston body lower extreme with the contact of piston intracavity wall in the piston cavity, the piston sleeve cover is established in the upper end outside of lower clutch and is connected with the lower clutch through the pin, round pin piece and through-hole are located piston sleeve and carry on spacingly through piston sleeve.
2. The water flooding anti-jacking slip anchor of claim 1, wherein: the liquid inlet hole and the pin block are both multiple, the radial size of the pin block is smaller than that of the piston cavity, and a groove for inserting the pin block is formed in the central tube.
3. The water flooding anti-jacking 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-jacking slip anchor of claim 2, wherein: the positions of the grooves and the liquid inlet holes are arranged in a staggered manner; the inner surface of the groove is an inclined surface, and the shape of the end part of the pin block positioned in the central tube is matched with that of the groove.
5. The water flooding anti-jacking slip anchor of claim 3 or 4, wherein: and the inner surface and the outer surface of the piston body are respectively provided with a sealing ring which is in sealing fit with the central pipe and the cylinder sleeve.
6. The water flooding anti-jacking slip anchor of claim 5, wherein: the outer surface of center tube is equipped with the spacing recess that has length on the axial, spacing recess is located feed liquor hole below, the fixed spacing key that reciprocates along spacing recess that is equipped with on the lower clutch.
7. The water flooding anti-jacking slip anchor of claim 6, wherein: and sealing devices are arranged between the central pipe and the lower joint and between the lower joint and the cylinder sleeve, and are positioned below the limiting groove.
8. The water flooding anti-jacking slip anchor of claim 5, wherein: 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 formed in the shoulder.
9. The water flooding anti-jacking slip anchor of claim 1, wherein: 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 protrusion arranged on the outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921547270.9U CN210396676U (en) | 2019-09-18 | 2019-09-18 | Water injection anti-jacking slip anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921547270.9U CN210396676U (en) | 2019-09-18 | 2019-09-18 | Water injection anti-jacking slip anchor |
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| Publication Number | Publication Date |
|---|---|
| CN210396676U true CN210396676U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921547270.9U Active CN210396676U (en) | 2019-09-18 | 2019-09-18 | Water injection anti-jacking slip anchor |
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| CN (1) | CN210396676U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439489A (en) * | 2019-09-18 | 2019-11-12 | 东营市元捷石油机械有限公司 | Fill the water anti-jack slips anchor |
-
2019
- 2019-09-18 CN CN201921547270.9U patent/CN210396676U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439489A (en) * | 2019-09-18 | 2019-11-12 | 东营市元捷石油机械有限公司 | Fill the water anti-jack slips anchor |
| CN110439489B (en) * | 2019-09-18 | 2024-08-02 | 东营市元捷石油机械有限公司 | Water injection anti-jacking slip anchor |
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