CN111364956A - Sand control injection allocation integrated packer - Google Patents
Sand control injection allocation integrated packer Download PDFInfo
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- CN111364956A CN111364956A CN202010192971.6A CN202010192971A CN111364956A CN 111364956 A CN111364956 A CN 111364956A CN 202010192971 A CN202010192971 A CN 202010192971A CN 111364956 A CN111364956 A CN 111364956A
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- 238000002347 injection Methods 0.000 title claims abstract description 31
- 239000007924 injection Substances 0.000 title claims abstract description 31
- 239000004576 sand Substances 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 55
- 238000010008 shearing Methods 0.000 claims abstract description 28
- 238000004873 anchoring Methods 0.000 claims abstract description 16
- 210000000078 claw Anatomy 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 23
- 210000001503 joint Anatomy 0.000 claims description 17
- 125000006850 spacer group Chemical group 0.000 claims description 17
- 238000012546 transfer Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 9
- 230000002265 prevention Effects 0.000 abstract description 5
- 239000002332 oil field water Substances 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 14
- 210000002445 nipple Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010862 gear shaping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- 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
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
- E21B33/1265—Packers; Plugs with fluid-pressure-operated elastic cup or skirt with mechanical slips
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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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to the technical field of well completion, and discloses a sand prevention and injection allocation integrated packer which comprises a releasing mechanism, a setting mechanism, a sealing mechanism, an anchoring mechanism, an unsetting mechanism and an injection allocation mechanism. The releasing process is that the lower central shaft is continuously pressed, the first shearing pin is sheared to push the upper piston, the spacing ring and the limiting sleeve to move upwards, so that the square buckle connector is separated from the middle connector, and releasing is finished. The invention solves the problem that the simple sand control and water injection of the existing oil field water injection well can not be completed at one time, and the simple sand control tubular column and the water injection production tubular column can be put in one trip to produce or inject water while isolating the stratum production zone.
Description
Technical Field
The invention belongs to the technical field of petroleum and natural gas well completion, and particularly relates to an integrated packer capable of preventing sand and injection allocation.
Background
In the field of oil field oil production well completion industry, in order to seal an oil production layer and a construction layer, prevent fluid and pressure interference between layers and meet the requirement of sand prevention operation, ensure production safety and control the stratum to the maximum extent, a packer is often used, and in the process of oil field exploitation, water needs to be injected to drive oil exploitation due to stratum depletion.
At present, when sand control and water injection are carried out on packers at home and abroad, two operations are needed, the time is long, the cost is high, the price of an imported packer is high, and the like, so that the operation efficiency is influenced.
Disclosure of Invention
The invention aims to solve the technical problem caused by two operations of sand prevention and water injection at present, and provides a sand prevention and injection allocation integrated packer which can isolate a stratum from a production layer and has a water injection function.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a sand control injection allocation integrated packer comprises a releasing mechanism, a setting mechanism, a sealing mechanism, an anchoring mechanism, a deblocking mechanism and an injection allocation mechanism;
the releasing mechanism consists of an upper joint, a baffle ring, a positioning release sleeve, a connecting sleeve, an upper piston, a square buckle joint, a first snap spring, a first shearing pin, a first anti-rotation pin, a spacer ring and a limiting sleeve; the upper joint is in threaded connection with the outer side of the upper part of the lower central shaft, the baffle ring and the connecting sleeve are in threaded connection with the outer part of the upper joint from top to bottom in sequence, the positioning release sleeve is sleeved outside the connecting sleeve, and the positioning release sleeve is connected with the connecting sleeve through a first anti-rotation pin; the positioning release sleeve is in toothed insertion connection with the positioning sleeve, the upper part of the square buckle joint is connected with the lower part of the connecting sleeve, and the lower part of the square buckle joint is in threaded connection with the upper part of the middle joint; the upper piston, the spacer ring and the limiting sleeve are sleeved outside the lower central shaft, and support is formed on the opposite lock joint; the half-back groove structure of the upper piston and the half-back groove structure of the spacer ring are arranged in the half-back groove structure of the limiting sleeve together, so that the upper piston, the spacer ring and the limiting sleeve are sleeved together; a hydraulic cavity for releasing the hand is formed between the inner side of the upper part of the upper piston and the lower central shaft, and the upper side and the lower side of the hydraulic cavity for releasing the hand are sealed between the upper piston and the lower central shaft through sealing rings arranged at different diameters to form differential pressure annulus; a first clamp spring is arranged between the inner side of the lower part of the upper piston and the lower central shaft and is installed in a clamp spring groove of the lower central shaft; the inner side of the lower part of the upper piston is in threaded connection with a first shearing pin, and the first shearing pin is inserted into a shearing pin groove on the outer side of the lower central shaft;
the setting mechanism consists of a positioning sleeve, a second anti-rotation pin, a second shearing pin, an intermediate joint, a lower piston sleeve, a lower piston, a lock ring sleeve, a lock ring and an outer central tube; the middle joint is arranged in the positioning sleeve, a second anti-rotation pin and a second shearing pin are connected between the middle joint and the positioning sleeve, and a sealing ring is arranged between the middle joint and the positioning sleeve; the lower part of the middle joint is in threaded connection with the upper part of the outer central pipe; the positioning sleeve, the lower piston sleeve, the lock ring sleeve and the upper gauge ring are sequentially in threaded connection from top to bottom, and the connection position is sealed through a sealing ring; the lower piston sleeve, the lower piston, the lock ring sleeve and the upper gauge ring are sleeved on the outer central pipe and form a setting hydraulic cavity together with the outer central pipe; the lower piston sleeve is provided with a radial through hole, and the lower piston is arranged inside the lower piston sleeve and sleeved outside the outer central pipe; a differential pressure annulus is formed between the lower piston and the lower piston sleeve through sealing rings arranged at different diameters, so that the lower piston sleeve can be pushed to move downwards by the pressurizing liquid; the locking ring is connected inside the locking ring sleeve through one-way threads and is connected with the outer central pipe through one-way threads, so that the locking ring can only move downwards relative to the outer central pipe and cannot move upwards;
the sealing mechanism consists of an upper gauge ring, a rubber cylinder assembly and a lower gauge ring, and the upper gauge ring, the rubber cylinder assembly and the lower gauge ring are sequentially sleeved outside the outer central pipe;
the anchoring mechanism consists of an upper cone, a third shear pin, a slip sleeve, a slip, a spring piece, a lower cone, a third anti-rotation pin and a key, and the whole anchoring mechanism is sleeved on the outer central pipe; a third shear pin connects the upper cone and the outer center tube; the upper cone is in threaded connection with the lower part of the lower gauge ring; the slips are arranged between the upper cone and the lower cone and are sleeved in the open holes of the slip sleeves; the upper part of the slip sleeve is sleeved on the upper cone, the lower end of the slip sleeve is sleeved on the lower cone, and the slip sleeve and the lower cone are limited through a third anti-rotation pin 4; the spring piece is arranged at the middle groove of the slip; the third rotation-preventing pin is fixed on the lower cone in a threaded manner and is arranged in an anti-rotation groove of the slip sleeve; the key is inserted in a key slot between the upper cone and the outer central pipe and a key slot between the lower cone and the outer central pipe so as to fix the upper cone and the lower cone;
the deblocking mechanism consists of an elastic claw, a deblocking ring, a deblocking screw and a lower joint; the lower cone is connected with the lower joint and then sleeved outside the elastic claw;
the injection allocation mechanism consists of a lower central shaft, a sealing module, a support sleeve, a second snap spring, a clamp, a sliding claw and a lower retainer ring; the lower central shaft is provided with a control pipeline channel and an upper pressure transfer hole and a lower pressure transfer hole, the upper pressure transfer hole is arranged corresponding to the hydraulic cavity of the release handle, the pressing liquid enters the hydraulic cavity of the release handle through the upper pressure control, the upper piston moves upwards through the liquid pressure, the first shearing pin is sheared, and the spacing ring and the limiting sleeve are driven to move, so that the release handle is completed; the lower pressure transfer hole is arranged corresponding to the sliding claw, and liquid enters the setting hydraulic cavity through the lower pressure transfer hole of the lower central shaft to finish the setting action of the packer; the upper part of the lower central shaft is in threaded connection with the upper joint, the lower part of the lower central shaft is in threaded connection with the lower retainer ring, and the setting mechanism, the anchoring mechanism and the sealing mechanism are sleeved outside the lower central shaft; a sealing module, a support sleeve, a second snap spring, a clamp, a sliding claw and a lower retainer ring are arranged between the lower central shaft and the outer central pipe; the two groups of sealing modules are respectively arranged at the upper end and the lower end between the lower central shaft and the outer central tube; the support sleeve is arranged at the lower part of the upper group of sealing modules and is used for limiting the sealing modules at the upper part; the lower part of the support sleeve is provided with a second clamp spring fixed on the outer side of the lower central shaft, and the second clamp spring is used for limiting the support sleeve to move downwards relative to the lower central shaft; the sliding claw is arranged at the lower part of the support sleeve, the inner side of the upper part of the sliding claw is provided with an upper sealing ring and a lower sealing ring, and the outer side of the lower part of the sliding claw is provided with a claw hook; a second snap spring fixed on the outer side of the lower central shaft is arranged between the sliding claw and the lower central shaft, and the second snap spring is used for popping up after the sliding claw moves downwards relative to the lower central shaft; the clamp is arranged on the upper parts of the lower group of sealing modules and used for limiting the sealing modules on the lower parts of the clamping hoop; the upper part of the hoop is provided with a second clamp spring fixed on the outer side of the lower central shaft, and the second clamp spring is used for limiting the hoop to move upwards relative to the lower central shaft; the lower retainer ring is connected with the lower central shaft through threads and is inserted into the outer central pipe.
Furthermore, the square buckle connector is connected with the middle connector through a left-handed square buckle.
The invention has the beneficial effects that:
the invention solves the problem that the simple sand control pipe column and the water injection pipe column of the existing oil field water injection well can not be put in one time, the simple sand control pipe column and the water injection production pipe column can be put in one time, production or water injection is carried out while the stratum production layer is isolated, the production operation efficiency of the oil field is improved, and the operation time is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a sand control injection allocation integrated packer provided by the invention.
In the above figures: 1. a lower central shaft; 2. an upper joint; 3. a baffle ring; 4. positioning the release sleeve; 5. connecting sleeves; 6. a positioning sleeve; 7. an upper piston; 8. a square buckle joint; 9. a first clamp spring; 10. a first shear pin; 11. a first anti-rotation pin; 12. a spacer ring; 13. a limiting sleeve; 14. an intermediate joint; 15. a sealing module; 16. a lower piston sleeve; 17. a lower piston; 18. an outer center tube; 19. a locking ring; 20. a lock ring sleeve; 21. a support sleeve; 22. a second clamp spring; 23. clamping a hoop; 24. a sliding jaw; 25. an upper gauge ring; 26. a rubber cylinder assembly; 27. a lower gauge ring; 28. a lower retainer ring; 29. an upper cone; 30. a slip sleeve; 31. slips; 32. a spring plate; 33. a lower cone; 34. a third anti-rotation pin; 35. a key; 36. an elastic claw; 37. unsealing the ring; 38. a lower joint; 39. unsealing the screw; 40. a second anti-rotation pin; 41. a second shear pin; 42. a third shear pin.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1, the present embodiment provides a sand control injection allocation integrated packer, which includes a releasing mechanism, a setting mechanism, a sealing mechanism, an anchoring mechanism, a deblocking mechanism, and an injection allocation mechanism.
The releasing mechanism is composed of an upper joint 2, a baffle ring 3, a positioning release sleeve 4, a connecting sleeve 5, an upper piston 7, a square buckle joint 8, a first clamp spring 9, a first shearing pin 10, a first anti-rotation pin 11, a spacer ring 12 and a limiting sleeve 13. The upper joint 2 is in threaded connection with the outer side of the upper portion of the lower central shaft 1, the baffle ring 3 and the connecting sleeve 5 are sequentially in threaded connection with the outer portion of the upper joint 2 from top to bottom, the positioning release sleeve 4 is sleeved on the outer portion of the connecting sleeve 5, the positioning release sleeve 4 is connected with the connecting sleeve 5 through the first anti-rotation pin 11, the first anti-rotation pin 11 plays a role in positioning and preventing rotation, and the positioning release sleeve 4 is prevented from rotating relative to the connecting sleeve 5. The bottom of the positioning release sleeve 4 is provided with gear shaping, the top of the positioning sleeve 6 is provided with a slot, the positioning release sleeve 4 is connected with the positioning sleeve 6 in a toothed manner, the effects of fixing, preventing rotation and transmitting torque are achieved, and therefore forward rotation torque is provided in the packer running-in process, and the square buckle joint 8 is prevented from being reversely buckled. The upper outer side of the square buckle joint 8 is in threaded connection with the lower inner side of the connecting sleeve 5, the lower outer side of the square buckle joint 8 is in threaded connection with the upper inner side of the middle joint 14, and the threaded connection adopts left-handed square buckle connection and is used for releasing hands in a forward rotation mode. The upper piston 7, the spacer ring 12 and the stop collar 13 are sleeved outside the lower central shaft 1 and form a support for the snap joint 8. The inner side of the lower part of the upper piston 7 is provided with a half-return groove structure, the inner side of the upper part of the spacer ring 12 is provided with a half-return groove structure, the outer side of the upper part of the limit sleeve 13 is provided with a half-return groove structure, and the half-return groove structure of the upper piston 7 and the half-return groove structure of the spacer ring 12 are installed in the half-return groove structure of the limit sleeve 13 together, so that the upper piston 7, the spacer ring 12 and the limit sleeve 13 are mutually sleeved together. A hydraulic cavity for releasing the hand is formed between the inner side of the upper part of the upper piston 7 and the lower central shaft 1, and the upper side and the lower side of the hydraulic cavity for releasing the hand are sealed between the upper piston 7 and the lower central shaft 1 through sealing rings arranged at different diameters to form differential pressure annulus. A first clamp spring 9 is arranged between the inner side of the lower part of the upper piston 7 and the lower central shaft 1, and the first clamp spring 9 is installed in a clamp spring groove of the lower central shaft 1 and used for preventing the resetting of the sleeved body of the upper piston 7, the spacer ring 12 and the limiting sleeve 13 after the hand is taken off. The inner side of the lower part of the upper piston 7 is in threaded connection with a first shearing pin 10, the first shearing pin 10 is inserted into a shearing pin groove on the outer side of the lower central shaft 1, and the first shearing pin 10 plays a role in fixing before releasing the hand.
Through the central tube (connect in the upper end oil pipe of lower shaft 1) and suppress, liquid gets into the hydraulic pressure chamber of taking off the hand through the last biography pressure hole on the lower shaft 1, promotes upper piston 7 and removes left, and first shear pin 10 is cut off to drive spacer ring 12 and stop collar 13 and remove, make the side detain and connect 8 after the lower part does not have the support, the side detain and connect 8 inwards retrieves, accomplishes the action of taking off the hand.
The setting mechanism consists of a positioning sleeve 6, a second anti-rotation pin 40, a second shearing pin 41, an intermediate joint 14, a lower piston sleeve 16, a lower piston 17, a lock ring sleeve 20, a lock ring 19 and an outer central pipe 18. The middle joint 14 is arranged inside the positioning sleeve 6, a second anti-rotation pin 40 and a second shearing pin 41 are connected between the middle joint 14 and the positioning sleeve 6, the second anti-rotation pin 40 is used for preventing the positioning sleeve 6 and the middle joint 14 from rotating, and the second shearing pin 41 is used for preventing the positioning sleeve 6 from moving under the condition of not setting; and a sealing ring is arranged between the middle joint 14 and the positioning sleeve 6, so that liquid is prevented from leaking out during setting. The upper inside of the intermediate nipple 14 is screwed to the lower outside of the square nipple 8, and the lower inside of the intermediate nipple 14 is screwed to the upper outside of the outer center tube 18. The positioning sleeve 6, the lower piston sleeve 16, the locking ring sleeve 20 and the upper gauge ring 25 are sequentially in threaded connection from top to bottom, and are sealed at the connection positions through sealing rings. The lower piston sleeve 16, lower piston 17, lock ring sleeve 20 and upper gauge ring 25 are fitted over the outer center tube 18 to form a setting hydraulic chamber with the outer center tube 18. The lower piston sleeve 16 is provided with radial through holes for venting internal gas or liquid between the lower piston sleeve 16 and the lower piston 17 when the lower piston sleeve 16 is moved. The lower piston 17 is arranged inside the lower piston sleeve 16 and is sleeved outside the outer central tube 18. The lower piston 17 and the lower piston sleeve 16 are sealed by O-rings arranged at different diameters to form a differential pressure annulus, so that the lower piston sleeve 16 can be pushed to move downwards by the pressurized liquid. The locking ring 19 is connected inside the locking ring sleeve 20 through one-way threads and is connected with the outer central tube 18 through one-way threads, so that the locking ring 19 can only move downwards relative to the outer central tube 18 and cannot move upwards; the locking ring 19 is used to prevent the locking ring sleeve 20 from moving upwards after setting.
Through central tube pressurization, liquid enters a setting hydraulic cavity through a lower pressure transmission hole in the lower central shaft 1 and a pressure transmission hole in the outer central tube 18, the lower piston sleeve 16 is pushed to move downwards, the lower piston sleeve 16 is linked with the positioning sleeve 6 to cut off the shearing pin 41, the locking ring sleeve 20 and the upper gauge ring 25 are pushed to move downwards, and the locking ring sleeve 20 drives the inner locking ring 19 to move downwards through threads until setting is finished.
The sealing mechanism consists of an upper gauge ring 25, a rubber sleeve assembly 26 and a lower gauge ring 27, wherein the upper gauge ring 25, the rubber sleeve assembly 26 and the lower gauge ring 27 are sequentially sleeved outside the outer central tube 18. The sealing mechanism is mainly used for sealing an oil layer and plays a role in isolating the annulus of the casing.
The anchoring mechanism is composed of an upper cone 29, a third shear pin 42, a slip sleeve 30, slips 31, a spring sheet 32, a lower cone 33, a third rotation prevention pin 34 and a key 35, and the whole anchoring mechanism is sleeved on the outer central pipe 18. The third shear pin 42 connects the upper cone 29 and the outer central tube 18, the slips are prevented from opening due to the advance movement of the upper cone 29 in the running process, the setting is accidental, when the setting position is reached, the setting mechanism moves to push the upper cone 29 to move downwards and rightwards, the third shear pin 42 is sheared, and the anchoring mechanism is set. The upper cone 29 is screwed on the lower part of the lower gauge ring 27; the slips 31 are arranged between the upper cone 29 and the lower cone 33 and are sleeved in the open holes of the slip sleeve 30; the upper part of the slip sleeve 30 is sleeved on the upper cone 29, the lower end of the slip sleeve is sleeved on the lower cone 33, and the slip sleeve 30 and the lower cone 33 are limited by a third anti-rotation pin 34. The spring piece 32 is arranged in a groove in the middle of the slip 31 and fixed by interference fit, and mainly has the function of preventing the slip 31 from being ejected out in advance in the process of running. A third anti-rotation pin 34 is fixed to the lower cone 33 by means of a screw and is installed in an anti-rotation groove of the slip sleeve 30 for preventing the slip sleeve 30 from rotating. The key 35 is inserted in the key slot between the upper cone 29 and the outer center tube 18 and the key slot between the lower cone 33 and the outer center tube 18 for fixing the upper cone 29 and the lower cone 33 and preventing the upper cone 29 and the lower cone 33 from freely rotating relative to the outer center tube 18.
Through central tube pressing, in the packer setting process, liquid enters a setting hydraulic cavity through a lower pressure transmission hole in a lower central shaft 1, a lower gauge ring 27 pushes an upper cone 29 to move downwards, the upper cone 29 pushes a slip 31 to compress a spring piece 32, the slip 31 is pushed out from an opening in a slip sleeve 30, and the slip 31 bites a sleeve to finish anchoring action.
The unsealing mechanism consists of an elastic claw 36, an unsealing ring 37, an unsealing screw 39 and a lower joint 38. The elastic claw 36 is in threaded connection with the lower portion of the outer central tube 18, the unsealing ring 37 is sleeved in the elastic claw 36 and fixed on the elastic claw 36 through an unsealing screw 39, the lower connector 38 is in threaded connection with the lower portion of the lower cone 33, and the lower cone 33 is connected with the lower connector 38 and then sleeved outside the elastic claw 36.
The packer is unsealed by using a special unsealing tool, the unsealing tool pulls the unsealing ring 37 to move leftwards, the unsealing screw 39 is cut, the elastic claw 36 is recovered and moves upwards to the interior of the lower cone 33, and the unsealing action is completed.
The injection allocation mechanism comprises a lower central shaft 1, a sealing module 15, a support sleeve 21, a second snap spring 22, a clamp 23, a sliding claw 24 and a lower retainer ring 28. The lower central shaft 1 is provided with a control pipeline channel and an upper pressure transmission hole and a lower pressure transmission hole, wherein the control pipeline channel is used for passing through 1/4' control pipelines. The upper pressure transmission hole is arranged corresponding to the hydraulic cavity of the releasing handle, the pressure transmission liquid enters the hydraulic cavity of the releasing handle through the upper pressure transmission, the upper piston 7 moves upwards through the liquid pressure, the first shearing pin 10 is sheared, the spacing ring 12 and the limiting sleeve 13 are driven to move, and the releasing handle is completed. The lower pressure transmission hole is arranged corresponding to the sliding claw 24, and liquid enters the setting hydraulic cavity through the lower pressure transmission hole of the lower central shaft 1 to finish the setting action of the packer. The upper part of the lower central shaft 1 is in threaded connection with the upper joint 2, the lower part of the lower central shaft is in threaded connection with the lower retainer ring 28, the setting mechanism, the anchoring mechanism and the sealing mechanism are all sleeved on the lower central shaft 1, and setting and releasing pressure is provided through two pressure transmitting holes in the lower central shaft 1. Between the lower central shaft 1 and the outer central tube 18, there are provided a sealing module 15, a support sleeve 21, a second snap spring 22, a clamp 23, a sliding jaw 24 and a lower retainer ring 28. Two sets of sealing modules 15 are respectively arranged at the upper end and the lower end between the lower central shaft 1 and the outer central shaft 18, and the two sets of sealing modules 15 are used for preventing liquid from leaking from the upper end and the lower end of the outer central shaft 18 and smoothly flowing into the pressure transmission hole of the outer central shaft 18 when the liquid enters between the outer central shaft 18 and the lower central shaft 1 through the lower pressure transmission hole of the lower central shaft 1. The support sleeve 21 is disposed at the lower portion of the upper group of sealing modules 15, and is used for limiting the position of the upper sealing module 15, and preventing the group of sealing modules 15 from moving downwards. The lower part of the support sleeve 21 is provided with a second snap spring 22 fixed outside the lower central shaft 1, and the second snap spring 22 is used for limiting the downward movement of the support sleeve 21 relative to the lower central shaft 1. The sliding claw 24 is arranged at the lower part of the support sleeve 21, the upper inner side and the lower inner side of the sliding claw are provided with an upper sealing ring and a lower sealing ring, and the outer side of the lower part is provided with a claw hook. After the packer is set and the packer is released, the central shaft 1 is lifted, the claw hook at the lower part of the sliding claw 24 is limited through the inner groove of the outer central pipe 18 and moves downwards relative to the lower central shaft 1, and the lower pressure transmission hole of the lower central shaft 1 is sealed after the movement, so that liquid is prevented from leaking from the lower pressure transmission hole during production operation. A second snap spring 22 fixed on the outer side of the lower central shaft 1 is arranged between the sliding claw 24 and the lower central shaft 1, and the second snap spring 22 is used for popping up after the sliding claw 24 moves downwards relative to the lower central shaft 1 so as to prevent the sliding claw 24 from moving upwards relative to the lower central shaft 1. The clip 23 is provided on the upper portion of the lower set of sealing modules 15 for limiting the position of the lower sealing modules 15 and preventing the set of sealing modules 15 from moving upward. The upper part of the clamp 23 is provided with a second clamp spring 22 fixed on the outer side of the lower central shaft 1, and the second clamp spring 22 is used for limiting the upward movement of the clamp 23 relative to the lower central shaft 1. The lower retainer 28 is positioned to be screwed to the lower central shaft 1 and inserted into the outer central tube 18 to prevent the parts that are nested above the lower retainer 28 from falling out.
The injection allocation mechanism is mainly used for smoothly conveying liquid from a wellhead to a downhole, and the sealing module 15 is matched with the outer central pipe 18 to ensure that setting pressure liquid cannot flow out.
The sand control injection allocation integrated packer of the invention has the working process as follows:
setting: the lower piston sleeve 16 is pushed to move downwards, the lower piston sleeve 16 is linked with the positioning sleeve 6 to cut the second shearing pin 41, the locking ring sleeve 20 and the upper gauge ring 25 are pushed to move downwards, the locking ring sleeve 20 drives the inner locking ring 19 to move downwards through threads, the upper gauge ring 25 moves downwards to compress the rubber sleeve assembly 26, the lower gauge ring 27 continues to move downwards, the lower gauge ring 27 pushes the upper cone 29 to move downwards, the upper cone 29 pushes the slips 31 to compress the spring piece 32, the slips 31 are pushed out from the opening in the slip sleeve 30, the slips 31 bite the sleeve to finish the anchoring action, and the upper gauge ring 25 continues to move downwards to compress the rubber sleeve assembly 26 until the rubber sleeve assembly is completely set. The outer central tube 18 and the locking ring 19 have a one-way locking function, the outer central tube 18 and the locking ring 19 can move relatively in the setting process, and after the setting is finished and pressure is relieved, the packer is kept in the setting state under the locking function of the outer central tube 18 and the locking ring 19.
After the setting of the packer is finished, water injection operation is directly carried out or water injection operation is carried out after the hand is taken off according to the requirement on the site.
The process of releasing the hands comprises the following steps: and continuously pressurizing the interior of the lower central shaft 1, enabling liquid to enter a hydraulic cavity from a pressure transfer hole in the upper part of the lower central shaft 1, shearing the first shearing pin 10, pushing the upper piston 7, the spacer ring 12 and the limiting sleeve 13 to move upwards, removing the support at the lower part of the square buckle joint 8, separating the square buckle joint 8 from the middle joint 14, and finishing the releasing.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make various changes and modifications within the spirit and scope of the present invention without departing from the spirit and scope of the appended claims.
Claims (2)
1. A sand control injection allocation integrated packer is characterized by comprising a releasing mechanism, a setting mechanism, a sealing mechanism, an anchoring mechanism, a deblocking mechanism and an injection allocation mechanism;
the releasing mechanism consists of an upper joint, a baffle ring, a positioning release sleeve, a connecting sleeve, an upper piston, a square buckle joint, a first snap spring, a first shearing pin, a first anti-rotation pin, a spacer ring and a limiting sleeve; the upper joint is in threaded connection with the outer side of the upper part of the lower central shaft, the baffle ring and the connecting sleeve are in threaded connection with the outer part of the upper joint from top to bottom in sequence, the positioning release sleeve is sleeved outside the connecting sleeve, and the positioning release sleeve is connected with the connecting sleeve through a first anti-rotation pin; the positioning release sleeve is in toothed insertion connection with the positioning sleeve, the upper part of the square buckle joint is connected with the lower part of the connecting sleeve, and the lower part of the square buckle joint is in threaded connection with the upper part of the middle joint; the upper piston, the spacer ring and the limiting sleeve are sleeved outside the lower central shaft, and support is formed on the opposite lock joint; the half-back groove structure of the upper piston and the half-back groove structure of the spacer ring are arranged in the half-back groove structure of the limiting sleeve together, so that the upper piston, the spacer ring and the limiting sleeve are sleeved together; a hydraulic cavity for releasing the hand is formed between the inner side of the upper part of the upper piston and the lower central shaft, and the upper side and the lower side of the hydraulic cavity for releasing the hand are sealed between the upper piston and the lower central shaft through sealing rings arranged at different diameters to form differential pressure annulus; a first clamp spring is arranged between the inner side of the lower part of the upper piston and the lower central shaft and is installed in a clamp spring groove of the lower central shaft; the inner side of the lower part of the upper piston is in threaded connection with a first shearing pin, and the first shearing pin is inserted into a shearing pin groove on the outer side of the lower central shaft;
the setting mechanism consists of a positioning sleeve, a second anti-rotation pin, a second shearing pin, an intermediate joint, a lower piston sleeve, a lower piston, a lock ring sleeve, a lock ring and an outer central tube; the middle joint is arranged in the positioning sleeve, a second anti-rotation pin and a second shearing pin are connected between the middle joint and the positioning sleeve, and a sealing ring is arranged between the middle joint and the positioning sleeve; the lower part of the middle joint is in threaded connection with the upper part of the outer central pipe; the positioning sleeve, the lower piston sleeve, the lock ring sleeve and the upper gauge ring are sequentially in threaded connection from top to bottom, and the connection position is sealed through a sealing ring; the lower piston sleeve, the lower piston, the lock ring sleeve and the upper gauge ring are sleeved on the outer central pipe and form a setting hydraulic cavity together with the outer central pipe; the lower piston sleeve is provided with a radial through hole, and the lower piston is arranged inside the lower piston sleeve and sleeved outside the outer central pipe; a differential pressure annulus is formed between the lower piston and the lower piston sleeve through sealing rings arranged at different diameters, so that the lower piston sleeve can be pushed to move downwards by the pressurizing liquid; the locking ring is connected inside the locking ring sleeve through one-way threads and is connected with the outer central pipe through one-way threads, so that the locking ring can only move downwards relative to the outer central pipe and cannot move upwards;
the sealing mechanism consists of an upper gauge ring, a rubber cylinder assembly and a lower gauge ring, and the upper gauge ring, the rubber cylinder assembly and the lower gauge ring are sequentially sleeved outside the outer central pipe;
the anchoring mechanism consists of an upper cone, a third shear pin, a slip sleeve, a slip, a spring piece, a lower cone, a third anti-rotation pin and a key, and the whole anchoring mechanism is sleeved on the outer central pipe; a third shear pin connects the upper cone and the outer center tube; the upper cone is in threaded connection with the lower part of the lower gauge ring; the slips are arranged between the upper cone and the lower cone and are sleeved in the open holes of the slip sleeves; the upper part of the slip sleeve is sleeved on the upper cone, the lower end of the slip sleeve is sleeved on the lower cone, and the slip sleeve and the lower cone are limited through a third anti-rotation pin 4; the spring piece is arranged at the middle groove of the slip; the third rotation-preventing pin is fixed on the lower cone in a threaded manner and is arranged in an anti-rotation groove of the slip sleeve; the key is inserted in a key slot between the upper cone and the outer central pipe and a key slot between the lower cone and the outer central pipe so as to fix the upper cone and the lower cone;
the deblocking mechanism consists of an elastic claw, a deblocking ring, a deblocking screw and a lower joint; the lower cone is connected with the lower joint and then sleeved outside the elastic claw;
the injection allocation mechanism consists of a lower central shaft, a sealing module, a support sleeve, a second snap spring, a clamp, a sliding claw and a lower retainer ring; the lower central shaft is provided with a control pipeline channel and an upper pressure transfer hole and a lower pressure transfer hole, the upper pressure transfer hole is arranged corresponding to the hydraulic cavity of the release handle, the pressing liquid enters the hydraulic cavity of the release handle through the upper pressure control, the upper piston moves upwards through the liquid pressure, the first shearing pin is sheared, and the spacing ring and the limiting sleeve are driven to move, so that the release handle is completed; the lower pressure transfer hole is arranged corresponding to the sliding claw, and liquid enters the setting hydraulic cavity through the lower pressure transfer hole of the lower central shaft to finish the setting action of the packer; the upper part of the lower central shaft is in threaded connection with the upper joint, the lower part of the lower central shaft is in threaded connection with the lower retainer ring, and the setting mechanism, the anchoring mechanism and the sealing mechanism are sleeved outside the lower central shaft; a sealing module, a support sleeve, a second snap spring, a clamp, a sliding claw and a lower retainer ring are arranged between the lower central shaft and the outer central pipe; the two groups of sealing modules are respectively arranged at the upper end and the lower end between the lower central shaft and the outer central tube; the support sleeve is arranged at the lower part of the upper group of sealing modules and is used for limiting the sealing modules at the upper part; the lower part of the support sleeve is provided with a second clamp spring fixed on the outer side of the lower central shaft, and the second clamp spring is used for limiting the support sleeve to move downwards relative to the lower central shaft; the sliding claw is arranged at the lower part of the support sleeve, the inner side of the upper part of the sliding claw is provided with an upper sealing ring and a lower sealing ring, and the outer side of the lower part of the sliding claw is provided with a claw hook; a second snap spring fixed on the outer side of the lower central shaft is arranged between the sliding claw and the lower central shaft, and the second snap spring is used for popping up after the sliding claw moves downwards relative to the lower central shaft; the clamp is arranged on the upper parts of the lower group of sealing modules and used for limiting the sealing modules on the lower parts of the clamping hoop; the upper part of the hoop is provided with a second clamp spring fixed on the outer side of the lower central shaft, and the second clamp spring is used for limiting the hoop to move upwards relative to the lower central shaft; the lower retainer ring is connected with the lower central shaft through threads and is inserted into the outer central pipe.
2. The integrated sand control and injection allocation packer as claimed in claim 1, wherein the connecting threads of the square buckle joint and the middle joint are connected by adopting left-handed square buckle.
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| CN202010192971.6A CN111364956A (en) | 2020-03-18 | 2020-03-18 | Sand control injection allocation integrated packer |
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| CN113914812A (en) * | 2020-07-10 | 2022-01-11 | 中国海洋石油集团有限公司 | High-temperature-resistant dual-sealing packer and using method thereof |
| CN114458226A (en) * | 2021-10-11 | 2022-05-10 | 中国海洋石油集团有限公司 | Hydraulic pipeline setting type cable-passing packer and well completion string using same |
| CN116556878A (en) * | 2023-05-24 | 2023-08-08 | 东营市福利德石油科技开发有限责任公司 | Packer capable of being set and unset repeatedly |
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Application publication date: 20200703 |