CN118442029B - Packer in carbon dioxide flooding injection and production tubular column - Google Patents
Packer in carbon dioxide flooding injection and production tubular column Download PDFInfo
- Publication number
- CN118442029B CN118442029B CN202410774784.7A CN202410774784A CN118442029B CN 118442029 B CN118442029 B CN 118442029B CN 202410774784 A CN202410774784 A CN 202410774784A CN 118442029 B CN118442029 B CN 118442029B
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- sleeve
- clamping
- unlocking
- baffle sleeve
- lock pin
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 14
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 title claims abstract description 14
- 239000007924 injection Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 210000000078 claw Anatomy 0.000 claims description 24
- 230000000670 limiting effect Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 24
- 230000006835 compression Effects 0.000 abstract description 15
- 238000007906 compression Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract 2
- 238000012856 packing Methods 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000035699 permeability Effects 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- 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
- E21B43/164—Injecting CO2 or carbonated water
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)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
一种二氧化碳驱油注采管柱中的封隔器，涉及油田井下工具技术领域，结构包括上接头、中心管和下接头，中心管上至少套装有两个胶筒，每两个相邻胶筒之间设置一套坐封机构，从而使得坐封推力引起的压缩量单独的作用在每一个胶筒上，使得每一个胶筒都能达到最理想的压缩程度，胶筒的密封性得到大幅提升，从而满足二氧化碳驱油注采管柱的气密封使用要求。本发明解封时通过投球作用到中心管内侧的解封滑套上，向中心管注压，迫使解封滑套向下滑动，而非强力上提解封，解封的成功率非常高，对胶筒和套管都没有损伤，且解封以后上提的过程中不会发生意外坐封的情况。
A packer in a carbon dioxide oil recovery injection and production pipe string, relates to the technical field of oil field downhole tools, and has a structure including an upper joint, a central tube and a lower joint, wherein at least two rubber tubes are mounted on the central tube, and a set of sealing mechanisms are arranged between each two adjacent rubber tubes, so that the compression caused by the setting thrust acts on each rubber tube individually, so that each rubber tube can reach the most ideal compression degree, and the sealing performance of the rubber tube is greatly improved, thereby meeting the airtight use requirements of the carbon dioxide oil recovery injection and production pipe string. When unsealing, the present invention acts on the unsealing sleeve on the inner side of the central tube by throwing a ball, injecting pressure into the central tube, and forcing the unsealing sleeve to slide downward, rather than forcibly lifting up to unseal, and the success rate of unsealing is very high, and there is no damage to the rubber tube and the casing, and no accidental setting will occur during the lifting process after unsealing.
Description
Technical Field
The invention belongs to the field of downhole tools in oil fields, and particularly relates to a packer in a carbon dioxide flooding oil injection and production string.
Background
In the carbon dioxide flooding oil extraction process, carbon dioxide needs to be injected into oil layers by utilizing a pipe column, and a layered injection and extraction process needs to be adopted preferentially because of the difference of the permeability of each oil layer. The compression type packer is needed in the layered injection and production process pipe column, the setting principle of the compression type packer is that the setting mechanism in the packer is pushed by pressing towards the central pipe, so that the setting piston compresses the rubber cylinder from one end of the rubber cylinder assembly, and the outer diameter of the rubber cylinder is increased after the rubber cylinder is extruded, thereby achieving the purpose of setting.
The packing element subassembly of current compression packer generally includes three packing element, three packing element receives the thrust of same setting piston, the compression volume that this thrust arouses is divided by three packing element average, each packing element is not compressed by the furthest in practice, every packing element still has compression room, the packing element leakproofness still remains to promote, the leakproofness of packing element is wanting to further promote the leakproofness of packing element can only be through increasing the thrust of setting piston, want to increase the thrust of setting piston, the pressure that the center tube was beaten, but the setting piston is sliding seal in the piston cover, sliding seal bearing capacity is limited (after the center tube pressure is too big, the sliding seal of setting piston in the piston cover will fail), consequently the thrust that the setting piston can give is limited, lead to current compression packer's sealing capacity to be limited, can not satisfy the airtight requirement of carbon dioxide flooding oil injection and production tubular column.
Disclosure of Invention
In order to solve the problem that the sealing degree of the rubber barrels is not high because each rubber barrel of the existing compression type packer is not compressed to the greatest extent, the invention provides the packer in the carbon dioxide flooding oil injection and production string, the invention creatively arranges a setting mechanism between every two adjacent rubber barrels, the compression amount caused by the setting thrust is independently acted on each rubber cylinder, so that each rubber cylinder can reach the optimal compression degree, the outer diameter of the rubber cylinder is larger, the tightness is greatly improved, and the gas sealing operation requirement of the carbon dioxide flooding oil injection and production pipe column is met.
The invention provides a packer in a carbon dioxide flooding oil injection and production string, which comprises an upper joint, a central pipe and a lower joint, wherein the upper end and the lower end of the central pipe are respectively connected with the upper joint and the lower joint, at least two rubber sleeves are sleeved on the central pipe, a set of setting mechanism is arranged between every two adjacent rubber sleeves, the setting mechanism comprises an upper baffle sleeve, a lower baffle sleeve, a release sleeve and a thrust spring A, the upper baffle sleeve and the lower baffle sleeve are respectively and slidably sleeved on the central pipe, the lower baffle sleeve is slidably and sealingly inserted into the upper baffle sleeve, the inner side of the upper baffle sleeve is provided with a unidirectional clamping tooth, the insertion end of the lower baffle sleeve is provided with a claw capable of radially bouncing, the claw is meshed with the unidirectional clamping tooth, under the limiting action of the claw, the upper baffle sleeve and the lower baffle sleeve are only limited to move in the direction away from each other, the surrounding area of the upper baffle sleeve, the lower baffle sleeve and the central pipe are sealing spaces, the central pipe between the upper baffle sleeve and the lower baffle sleeve is provided with a sealing gap communicated with the inner side of the central pipe, the central pipe is internally injected with the sealing sleeve, the sealing sleeve is pushed by the pressure in the sealing sleeves to be pushed by the sealing sleeves, and the sealing sleeves are not required to be compressed by the sealing sleeves at the two sides independently, and the sealing sleeves are compressed by the sealing sleeves are not needed to be compressed by the sealing sleeves; the unlocking sleeve is sleeved on the central tube in a sliding way, through grooves penetrating in the axial direction are uniformly distributed on the outer wall of the unlocking sleeve along the circumferential direction, the clamping jaws penetrate through the through grooves, the outer side of the unlocking sleeve is connected with a gathering ring, the outer side of the clamping jaws is provided with inclined planes, when the unlocking sleeve slides to the end parts of the clamping jaws, under the guiding action of the inclined plane, the claw is inwards folded by the folding ring, so that the meshing of the claw and the unidirectional clamping teeth is released, the inner side of the deblocking sleeve is provided with a trapezoid clamping groove, a pin hole is arranged on the corresponding central tube, a lock pin is inserted in the pin hole in a sliding manner, a deblocking sliding sleeve is inserted in the central tube in a sliding manner, one end of the lock pin is propped in the trapezoid clamping groove of the deblocking sleeve, the other end of the lock pin is propped against the deblocking sliding sleeve, the deblocking sleeve cannot generate axial displacement relative to the central tube under the limiting action of the lock pin, a thrust spring A is arranged between the deblocking sleeve and the lower blocking sleeve, in an initial state, the thrust spring A is in a compressed state, the upper end of the deblocking sliding sleeve is provided with a ball seat, during deblocking, balls are thrown to the central tube, the balls fall on the ball seat at the upper end of the deblocking sliding sleeve, the central tube is pressed, the balls push the deblocking sliding sleeve to generate downward sliding trend, finally the deblocking sliding pins are sheared off, the deblocking sliding sleeve is enabled to disappear under the limiting action of the lock pin, the thrust force A is pushed out of the trapezoid clamping groove, the deblocking sliding sleeve is close to the locking pin, and the locking pin is enabled to be in a direction of the deblocking sliding sleeve, and the clamping sleeve is enabled to be closed when the clamping groove is closed, and the clamping is closed to the annular groove is in a unidirectional, and the deblocking groove is closed, and the sealing is realized when the deblocking is realized, and the clamping is closed, and the clamping is opened, and the sealing is closed by the locking is in a unidirectional sealing groove.
The furling ring is composed of two semi-rings.
Optionally, as an alternative scheme that the lower retaining sleeve is provided with a claw capable of radially bouncing, the side wall of the lower retaining sleeve is provided with a square hole with a step, a clamping block is arranged in the square hole, the clamping block extends out of the side surface of the lower retaining sleeve, the extending part of the clamping block is provided with teeth meshed with the unidirectional clamping teeth, a thrust spring B is arranged between the step of the square hole and the clamping block, the clamping block has a movement trend of retracting into the lower retaining sleeve under the elastic force of the thrust spring B, the unlocking sleeve is inserted into the inner side of the lower retaining sleeve, an elastic block is arranged between the clamping block and the unlocking sleeve, the outer side of the unlocking sleeve below the elastic block is provided with an elastic block retraction groove for the elastic block to retract into, after the unlocking sleeve slides relative to the central pipe, the elastic block retraction groove can be aligned with the elastic block, so that the elastic block is retracted into the elastic block retraction groove, the clamping block can be retracted into the lower retaining sleeve under the action of the thrust spring B, and the meshing of the teeth and the unidirectional clamping block on the clamping block is released.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, the set of setting mechanism is innovatively arranged between every two adjacent rubber barrels, so that the compression caused by the setting thrust is independently acted on each rubber barrel, and therefore, each rubber barrel can reach the optimal compression degree, the tightness of the rubber barrel is greatly improved, and the gas sealing use requirement of the carbon dioxide flooding oil injection and production pipe column is met.
2. Compared with the existing powerful lifting and deblocking mode of the compression packer, the method is quite convenient in deblocking process, and only needs to press the central tube after throwing the ball, so that the deblocking sliding sleeve is pushed downwards. The success rate of deblocking is high, does not damage the rubber cylinder, does not damage the sleeve pipe.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of the invention prior to setting.
Fig. 2 is an enlarged view of a portion of a setting mechanism in accordance with a first embodiment of the present invention.
Fig. 3 is a cross-sectional view of the present invention after a setting is performed.
Figure 4 is a side view of a solution sleeve in an embodiment of the invention.
Fig. 5 is a cross-sectional view of an embodiment of the invention prior to setting.
Fig. 6 is an enlarged view of a portion of a setting mechanism in accordance with an embodiment of the present invention.
Fig. 7 is a partial view showing the mating relationship between the latch and the lower housing in the second embodiment of the present invention.
In the figure, 1, an upper joint; 2, a rubber cylinder, 3, an unsealing sliding sleeve, 4, a lock pin backset groove, 5, a central tube, 6, a lower joint, 7, a claw, 8, a one-way clamping tooth, 9, a furling ring, 10, a through groove, 11, an unclamping sleeve, 12, a lock pin, 13, a thrust spring A, 14, a lower blocking sleeve, 15, an upper blocking sleeve, 16, a slotting, 17, a ball seat, 18, a thrust spring B, 19, a clamping block, 20, an elastic block and 21, and an elastic block backset groove.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the first embodiment, the sealing device comprises an upper joint 1, a central tube 5 and a lower joint 6, wherein the upper end and the lower end of the central tube 5 are respectively connected with the upper joint 1 and the lower joint 6, two or more rubber barrels 2 are sleeved on the central tube 5, and the purpose of arranging a plurality of rubber barrels 2 is to provide multiple seals, and a set of setting mechanism is arranged between every two adjacent rubber barrels 2.
As shown in FIG. 3, the setting mechanism comprises an upper baffle sleeve 15, a lower baffle sleeve 14, a release sleeve 11 and a thrust spring A13, wherein the upper baffle sleeve 15 and the lower baffle sleeve 14 are respectively and slidably sleeved on the central tube 5, the lower baffle sleeve 14 is slidably and sealingly inserted into the upper baffle sleeve 15, the inner side of the upper baffle sleeve 15 is provided with a one-way clamping tooth 8, the insertion end of the lower baffle sleeve 14 is provided with a radially sprung claw 7, the claw 7 is matched with the one-way clamping tooth 8, under the limiting effect of the one-way clamping tooth 8 on the claw 7, the upper baffle sleeve 15 and the lower baffle sleeve 14 only move in the direction away from each other, and the upper baffle sleeve 15, The surrounding area of the lower baffle sleeve 14 and the central tube 5 is a sealed space, a slit 16 which is communicated with the inside and the outside of the central tube 5 is formed in the central tube 5 between the upper baffle sleeve 15 and the lower baffle sleeve 14, the pressure injected into the central tube 5 enters the sealed space through the slit 16, the pressure pushes the upper baffle sleeve 15 to ascend and pushes the lower baffle sleeve 14 to descend, so that rubber barrels 2 on two sides are extruded, the sealing thrust is independently acted on each rubber barrel 2, the compression amount caused by the sealing thrust is not equal to that of the three rubber barrels 2, but is independently acted on each rubber barrel 2, the elastic deformation of the rubber barrels 2 is larger than that of the prior art, and the sealing effect is obviously improved. The unlocking sleeve 11 is slidably sleeved on the central tube 5, through grooves 10 penetrating through the axial direction are uniformly distributed in the circumferential direction on the outer wall of the unlocking sleeve 11, the clamping claws 7 penetrate through the through grooves 10, the outer side of the unlocking sleeve 11 is connected with a folding ring 9, the folding ring 9 is composed of two semi-rings, the outer side of the clamping claws 7 is provided with an inclined plane, when the unlocking sleeve 11 slides to the end part of the clamping claws 7, the folding ring 9 folds the clamping claws 7 inwards under the guiding action of the inclined plane, so that the meshing of the clamping claws 7 and the unidirectional clamping teeth 8 is released, and after the meshing of the clamping claws 7 and the unidirectional clamping teeth 8 is released, the rubber cylinder 2 is unsealed. The inside of the unlocking sleeve 11 is provided with a trapezoid clamping groove, the corresponding central tube 5 is provided with a pin hole, a lock pin 12 is inserted in the pin hole in a sliding manner, an unlocking sliding sleeve 3 is inserted in the central tube 5 in a sliding manner, one end of the lock pin 12 is propped against the trapezoid clamping groove of the unlocking sleeve 11, the other end of the lock pin 12 is propped against the unlocking sliding sleeve 3, the unlocking sleeve 11 cannot axially displace relative to the central tube 5 under the limiting effect of the lock pin 12, a thrust spring A13 is arranged between the unlocking sleeve 11 and the lower blocking sleeve 14, and in an initial state, the thrust spring A13 is in a compressed state. The upper end of the deblocking sliding sleeve 3 is provided with a ball seat 17, the deblocking sliding sleeve 3 is connected with the central tube 5 through a deblocking shear pin, during deblocking, a ball is thrown to the central tube 5, the ball is dropped on the ball seat 17 at the upper end of the deblocking sliding sleeve 3, the central tube 5 is pressed, the ball is thrown to push the deblocking sliding sleeve 3 to generate a downward sliding trend, the deblocking shear pin is finally sheared off, the deblocking sliding sleeve 3 descends, the blocking effect on the lock pin 12 disappears, under the action of the thrust spring A13, the lock pin 12 is pushed out of a trapezoid clamping groove, the deblocking sleeve 11 which is not bound by the lock pin 12 slides towards the direction close to the clamping jaw 7 under the strong elasticity of the thrust spring A13, the clamping jaw 7 is folded inwards by the folding ring 9, and the meshing of the clamping jaw 7 and the unidirectional clamping tooth 8 is released, so that deblocking is realized. the outside of the deblocking sliding sleeve 3 above each lock pin 12 is provided with an annular lock pin backset groove 4, and each lock pin 12 can be retracted into the lock pin backset groove 4 when the deblocking sliding sleeve 3 slides down, so that deblocking of all rubber barrels 2 is realized. Compared with the existing packer which is lifted upwards by force to unseal, the method is more convenient in the unsealing process, higher in the unsealing success rate and free of damage to the rubber sleeve 2 and the casing.
In the first embodiment, the setting process is performed by pressing the central tube 5, the pressure enters between the upper baffle sleeve 15 and the lower baffle sleeve 14 through the slit 16 on the side wall of the central tube 5, the upper baffle sleeve 15 is pushed to move upwards, the lower baffle sleeve 14 is pushed to move downwards, the rubber barrels 2 on two sides are extruded, and under the limiting action of the unidirectional clamping teeth 8 and the clamping claws 7, the upper baffle sleeve 15 and the lower baffle sleeve 14 keep a separated state after being separated from each other, so that the setting is realized.
In the first embodiment, after the ball is thrown, the ball falls on the ball seat 17 at the upper end of the deblocking sliding sleeve 3, opens to the central tube 5, after the deblocking shear pin is sheared, the deblocking sliding sleeve 3 descends, the lock pin 12 retreats into the lock pin withdrawing groove 4 under the pushing of the thrust spring A13, the deblocking sleeve 11 slides towards the direction of the clamping jaw 7, the clamping jaw 7 is folded inwards by the folding ring 9 at the outer side of the deblocking sleeve 11, the meshing of the clamping jaw 7 and the unidirectional clamping tooth 8 is released, and the deblocking is realized.
In the second embodiment, as shown in fig. 6, unlike the first embodiment, the claw 7 in the setting mechanism is replaced by the clamping block 19, in this embodiment, a square hole with a step penetrating through the side wall needs to be machined on the side wall of the lower stop sleeve 14, the clamping block 19 is installed in the square hole, the clamping block 19 extends out of the side surface of the lower stop sleeve 14, the protruding portion of the clamping block 19 is provided with teeth engaged with the unidirectional clamping teeth 8, a thrust spring B18 is arranged between the step of the square hole and the clamping block 19, and under the action of the elastic force of the thrust spring B18, the clamping block 19 has a movement trend of retracting into the lower stop sleeve 14. The unlocking sleeve 11 is inserted into the inner side of the lower retaining sleeve 14, an elastic block 20 is arranged between the clamping block 19 and the unlocking sleeve 11, the elastic block 20 is compressed when the clamping block 19 slides in the square hole, an elastic block relief groove 21 used for the elastic block 20 to retract is formed in the outer side of the unlocking sleeve 11 below the elastic block 20, after the unlocking sleeve 11 slides relative to the central tube 5, the elastic block relief groove 21 can be aligned with the elastic block 20, so that the elastic block 20 is retracted into the elastic block relief groove 21, after the elastic block 20 is retracted into the elastic block relief groove 21 of the unlocking sleeve 11, the clamping block 19 can be retracted into the lower retaining sleeve 14 under the action of a thrust spring B18, and therefore meshing of teeth on the clamping block 19 and the unidirectional clamping teeth 8 is released, and unlocking is realized.
Claims (2)
1. A packer in a carbon dioxide flooding oil injection production string is characterized by comprising an upper joint (1), a central pipe (5) and a lower joint (6), wherein the upper end and the lower end of the central pipe (5) are respectively connected with the upper joint (1) and the lower joint (6), at least three rubber barrels (2) are sleeved on the central pipe (5), a set of setting mechanism is arranged between every two adjacent rubber barrels (2), the set of setting mechanism comprises an upper baffle sleeve (15), a lower baffle sleeve (14), a release sleeve (11) and a thrust spring A (13), the upper baffle sleeve (15) and the lower baffle sleeve (14) are respectively and slidably sleeved on the central pipe (5), the lower baffle sleeve (14) is slidably and hermetically inserted into the upper baffle sleeve (15), the inner side of the upper baffle sleeve (15) is provided with a one-way clamping tooth (8), the insertion end of the lower baffle sleeve (14) is provided with a radially movable clamping jaw (7), the clamping jaw (7) is meshed with the one-way clamping tooth (8), the upper baffle sleeve (15) and the lower baffle sleeve (14) is in a way, the upper baffle sleeve (14) and the lower baffle sleeve (14) is in a way and is in a sliding mode, and is far away from the upper baffle sleeve (5) and the upper baffle sleeve (14) and the lower baffle sleeve (5) are in a sliding mode, the upper baffle sleeve (14) is far away from the central pipe (5), the outer wall of the unlocking sleeve (11) is uniformly provided with through grooves (10) penetrating in the axial direction along the circumferential direction, the clamping claws (7) penetrate through the through grooves (10), the outer sides of the unlocking sleeve (11) are connected with folding rings (9), inclined surfaces are arranged on the outer sides of the clamping claws (7), when the unlocking sleeve (11) slides to the end parts of the clamping claws (7), the folding rings (9) fold the clamping claws (7) inwards under the guiding action of the inclined surfaces, and therefore the clamping claws (7) are disengaged from the unidirectional clamping teeth (8);
The inner side of the unlocking sleeve (11) is provided with a trapezoid clamping groove, a pin hole is formed in the corresponding central tube (5), a lock pin (12) is inserted in the pin hole in a sliding manner, an unlocking sliding sleeve (3) is inserted in the central tube (5) in a sliding manner, one end of the lock pin (12) is propped in the trapezoid clamping groove of the unlocking sleeve (11), the other end of the lock pin is propped against the unlocking sliding sleeve (3), the unlocking sleeve (11) cannot generate axial displacement relative to the central tube (5) under the limiting action of the lock pin (12), a thrust spring A (13) is arranged between the unlocking sleeve (11) and the lower baffle sleeve (14), in an initial state, the thrust spring A (13) is in a compressed state, the upper end of the unlocking sliding sleeve (3) is provided with a ball seat (17), the unlocking sliding sleeve (3) is connected with the central tube (5) through an unlocking shear pin, an annular lock pin withdrawal groove (4) is formed in the outer part of the unlocking sliding sleeve (3) above each lock pin (12), and each lock pin withdrawal groove (12) can be withdrawn into the lock pin withdrawal groove (4) when the unlocking sliding sleeve (3) slides down;
The folding ring (9) consists of two semi-rings.
2. The packer in the carbon dioxide flooding injection and production string according to claim 1, wherein as an alternative scheme that the lower baffle sleeve (14) is provided with a claw (7) capable of radially bouncing, a square hole with a step penetrating through the side wall is processed on the side wall of the lower baffle sleeve (14), a clamping block (19) is arranged in the square hole, the clamping block (19) stretches out of the side face of the lower baffle sleeve (14), teeth meshed with the unidirectional clamping teeth (8) are arranged on the stretching part of the clamping block (19), a thrust spring B (18) is arranged between the step of the square hole and the clamping block (19), the clamping block (19) has a movement trend of retracting into the lower baffle sleeve (14) under the elastic action of the thrust spring B (18), an elastic block (20) is arranged between the clamping block (19) and the clamping block (11), and an elastic block position (21) for retracting the elastic block (20) is arranged outside the clamping block (11) below the elastic block (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410774784.7A CN118442029B (en) | 2024-06-17 | 2024-06-17 | Packer in carbon dioxide flooding injection and production tubular column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410774784.7A CN118442029B (en) | 2024-06-17 | 2024-06-17 | Packer in carbon dioxide flooding injection and production tubular column |
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| CN118442029A CN118442029A (en) | 2024-08-06 |
| CN118442029B true CN118442029B (en) | 2024-12-06 |
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| CN119244190B (en) * | 2024-09-13 | 2025-04-25 | 大庆市天德忠石油科技有限公司 | A step-by-step unsealing packer for water injection wells |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113338841A (en) * | 2021-06-29 | 2021-09-03 | 郭洪霞 | Mechanical packer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4076083A (en) * | 1975-11-24 | 1978-02-28 | Otis Engineering Corporation | Method and apparatus for controlling a well during drilling operations |
| US5813458A (en) * | 1997-01-24 | 1998-09-29 | Baker Hughes Incorporated | Indicating dog sub for weight-set packers |
| US10280706B1 (en) * | 2018-08-31 | 2019-05-07 | Harvey Sharp, III | Hydraulic setting tool apparatus and method |
| CN112228001B (en) * | 2020-09-24 | 2022-11-11 | 齐齐哈尔亚盛机械制造有限公司 | Packer with low setting force and low unsetting force |
| CN112360413B (en) * | 2020-12-03 | 2022-11-04 | 中国石油天然气股份有限公司 | Milling deblocking and stuck releasing packer, milling tool and using method thereof |
| CN214741264U (en) * | 2021-05-27 | 2021-11-16 | 黑龙江景宏石油设备制造有限公司 | Water distribution drillable packer |
| CN218716669U (en) * | 2022-11-14 | 2023-03-24 | 牡丹江天庆石油机械设备有限公司 | A casing plugging packer |
| CN117605438A (en) * | 2023-12-21 | 2024-02-27 | 中国石油天然气集团有限公司 | Unpacking type fracturing and acidizing packer, tool pipe string, packing and unpacking method |
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| CN113338841A (en) * | 2021-06-29 | 2021-09-03 | 郭洪霞 | Mechanical packer |
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