CN212406646U - Safe deblocking releasing device - Google Patents
Safe deblocking releasing device Download PDFInfo
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- CN212406646U CN212406646U CN202021317521.7U CN202021317521U CN212406646U CN 212406646 U CN212406646 U CN 212406646U CN 202021317521 U CN202021317521 U CN 202021317521U CN 212406646 U CN212406646 U CN 212406646U
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- joint
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- deblocking
- outer sleeve
- central tube
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Abstract
The utility model relates to a safe deblocking and releasing device belongs to the well completion instrument technical field in oil field separate layer water injection and the oil gas production tubular column. The piston type hydraulic cylinder comprises an upper joint, an outer sleeve, a piston, a locking ring, a central pipe, a lower joint and the like, wherein the lower end of the upper joint is connected with the outer sleeve, and the lower end of the outer sleeve is in threaded connection with the lower joint; the upper end of the central pipe is sleeved on the inner surface of the lower end of the upper joint, and the lower end of the central pipe is sleeved on the inner surface of the lower end of the lower joint; a piston is arranged in an annular space formed by the outer sleeve and the central tube between the upper joint and the lower joint, a spring ring is arranged at the upper end of the piston, and a starting pin is arranged in the middle of the piston. The utility model discloses can not cut the start pin when lifting or transferring the tubular column, thoroughly avoided lower tubular column in-process because the tail pipe load overweight or lift the safety deblocking release device that the unstable operation of in-process appears and break off the phenomenon midway, and can provide the deblocking stroke for higher level's packer, realize the purpose of deblocking step by step, greatly reduced because of deblocking release card failure cause the possibility of oil-water well overhaul.
Description
Technical Field
The utility model relates to a safe deblocking and releasing device belongs to the well completion instrument technical field in oil field separate layer water injection and the oil gas production tubular column.
Background
Along with continuous deepening of oil gas development, measures such as multistage staged acid fracturing, separate-layer mining, fine water injection and the like are more and more, the measures all require that multistage packers are connected in series to form a multistage separate-layer process pipe column, and in order to improve the stability of the process pipe column, a pipe column stabilizer with an anchor clamp function is often added; when the pipe string is pulled out, because the pipe string stabilizer and the multi-stage packer are connected in series together and the deblocking is carried out simultaneously, the deblocking often fails due to the overlarge load, and finally the overhaul is caused.
In order to solve the problem, technicians adopt a pull-off type safety joint or a deblocking tool to solve the problem that the multistage layering pipe column cannot be pulled out, but the mode has the following defects:
1. when the well is drilled, the phenomenon that the safety joint or the unsealing tool is broken off midway often occurs because the tail pipe is overloaded or the lifting and lowering operation is not stable;
2. due to complex conditions in multiple aspects such as underground scaling, sand production, casing deformation and the like, the starting tension of the safety joint or the deblocking tool cannot be accurately calculated, or the purpose of deblocking and releasing cannot be achieved due to the fact that the size design of the shearing pin of the safety joint or the deblocking tool is unreasonable.
Disclosure of Invention
The utility model aims to provide a multi-stage layering process tubular column formed by tubular column stabilizers, packers and other tool assemblies, aiming at the defects of the prior art, the multi-stage layering process tubular column can be positioned on the upper part of a first-stage packer in the tubular column to play the role of safe releasing, and can also be positioned between two stages of packers in the tubular column to play the dual roles of gradual deblocking and safe releasing; the safe deblocking and releasing device solves the problem that the existing multistage layering process pipe column cannot be pulled out, so that the overhaul risk of the oil-water well is greatly reduced.
The utility model discloses a realize above-mentioned purpose through following technical scheme:
the utility model provides a safe deblocking release device, it comprises top connection, overcoat, spring ring, start pin, piston, catch, center tube and lower clutch, its characterized in that: the outer surface of the lower end of the upper joint is connected with an outer sleeve through threads, and the inner surface of the lower end of the outer sleeve is connected with a lower joint through threads; the upper end of the central pipe is sleeved on the inner surface of the lower end of the upper joint, and the lower end of the central pipe is sleeved on the inner surface of the lower end of the lower joint; the piston is arranged in an annular space formed by the outer sleeve and the central tube between the upper joint and the lower joint, the lower end of the piston is in contact with the upper end of the lower joint and is embedded into the locking ring for fixation, the upper end of the piston is provided with the spring ring, the middle part of the piston is provided with the starting pin, and one end of the starting pin is inserted into the central tube.
And a limiting shoulder a matched with the central pipe is manufactured on the inner surface of the lower end of the upper joint.
And a lifting shoulder is arranged on the inner surface of the lower end part of the lower joint, and a slot is formed at the upper end part of the lifting shoulder.
And one end of the outer sleeve, which is close to the upper joint, is provided with a pressure relief hole and a limiting groove.
The middle part of the central tube is sequentially provided with a trapezoidal boss, a wedge-shaped groove and a rectangular boss which are matched with the lock ring from top to bottom, the rectangular boss is provided with a liquid transfer hole, and the lower end part of the rectangular boss is provided with a bolt.
The upper end of the piston is provided with a groove for mounting the spring ring, and the lower end of the piston is provided with a limiting shoulder b.
And a sealing ring a is arranged on the inner wall of the upper joint, a sealing ring b is arranged on the inner wall and the outer wall of the piston, and a sealing ring c is arranged on the inner wall and the outer wall of the lower joint.
The outer surface of the lower end of the upper joint is connected with the outer sleeve through left-hand threads.
The safety deblocking and releasing device can be positioned on the upper part of the first-stage packer and can also be positioned between the two stages of packers.
Compared with the prior art, the utility model beneficial effect lie in:
1. the safety deblocking releasing device is started by pressurizing in the pipe column, the starting pin cannot be cut off when the pipe column is lifted or lowered, and the midway breaking phenomenon of the safety deblocking releasing device caused by the overweight load of a tail pipe or unstable operation in the lifting and lowering process in the pipe column lowering process is thoroughly avoided.
2. After the safety deblocking releasing device is additionally arranged on the upper part of the first-stage packer in the multi-stage layered process tubular column, the purpose of releasing the upper tubular column can be achieved.
3. After the safety deblocking releasing device is added between the two stages of packers, deblocking travel can be provided for the upper-stage packer, and the purpose of stepwise deblocking is achieved; the device has the advantages that the lifting force of the multistage layered process tubular column deblocking releasing and releasing is reduced, the success rate of the deblocking and releasing is improved, even when complex conditions such as scaling, sand production and casing deformation cause deblocking failure in the well, the purpose of releasing the upper tubular column through the safe deblocking releasing device is realized, and the double-action of the safe deblocking releasing device greatly reduces the possibility of oil-water well overhaul caused by deblocking and releasing failure.
Drawings
FIG. 1 is a schematic diagram of a safety unsealing releasing device;
FIG. 2 is a schematic front sectional view of a base pipe;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic front sectional view of the lower joint;
FIG. 5 is a cross-sectional view B-B of FIG. 4;
fig. 6 is a state diagram of the use of the security unsealing release device.
In the figure: 1. the device comprises an upper connector 1-1, limiting shoulders a, 2, an outer sleeve 2-1, a pressure relief hole 2-2, a limiting groove 3, sealing rings a and 4, a spring ring 5, sealing rings b and 6, a starting shear pin 7, a piston 7-1, a groove 7-2, limiting shoulders b and 8, a locking ring 9, a central pipe 9-1, a trapezoidal boss 9-2, a wedge-shaped groove 9-3, a rectangular boss 9-4, a liquid transfer hole 9-5, a plug pin 10, sealing rings c and 11, a lower connector 11-1, a lifting shoulder 11-2 and a slot.
Detailed Description
The safety unsealing releasing device is further explained as follows by combining the attached drawings:
the safety deblocking releasing device is suitable for a multi-stage layering process tubular column formed by assembling a tubular column stabilizer, a packer and other tools, can be positioned on the upper part of a first-stage packer and also can be positioned between two stages of packers, and is placed in a vertical state during use. The safety deblocking and releasing device comprises an upper joint 1, an outer sleeve 2, a spring ring 4, a starting pin 6, a piston 7, a locking ring 8, a central pipe 9 and a lower joint 11, wherein the outer surface of the lower end of the upper joint 1 is connected with the outer sleeve 2 through left-handed threads, the inner surface of the lower end of the outer sleeve 2 is connected with the lower joint 11 through threads, and one end of the outer sleeve 2, close to the upper joint 1, is provided with a pressure relief hole 2-1 and a limiting groove 2-2; the central tube 9 is arranged inside the outer sleeve 2, the upper end of the central tube 9 is sleeved on the inner surface of the lower end of the upper joint 1, and the lower end of the central tube 9 is sleeved on the inner surface of the lower end of the lower joint 11; a piston 7 is arranged in an annular space formed by the outer sleeve 2 and the central tube 9 between the upper joint 1 and the lower joint 11, the lower end of the piston 7 is in contact with the upper end of the lower joint 11 and is embedded into the locking ring 8 for fixation, the upper end of the piston 7 is provided with the spring ring 4, the middle part of the piston 7 is provided with the starting pin 6, and one end of the starting pin 6 is inserted into the central tube 9.
A lifting shoulder 11-1 is arranged on the inner surface of the lower end part of the lower connector 11, a slot 11-2 is formed at the upper end part of the lifting shoulder 11-1, and a limiting shoulder a1-1 matched with the central pipe 9 is formed on the inner surface of the lower end part of the upper connector 1; the middle part of the central tube 9 is sequentially provided with a trapezoidal boss 9-1, a wedge-shaped groove 9-2 and a rectangular boss 9-3 which are matched with the locking ring 8 from top to bottom, the lower end of the piston 7 is provided with a limiting shoulder b7-2, the wedge-shaped locking ring 8 is embedded in a cavity formed by the wedge-shaped groove 9-2 of the central tube 9, the rectangular boss 9-3 and the limiting shoulder b7-2 of the piston 7, the rectangular boss 9-3 is provided with a liquid transmission hole 9-4, and the lower end part of the rectangular boss 9-3 is provided with a bolt 9-5; a groove 7-1 for installing the spring ring 4 is formed in the upper end of the piston 7, and the spring ring 4 is arranged in the annular groove 7-1 of the piston 7; the inner wall of the upper joint 1 is provided with a sealing ring a3, the inner and outer walls of the piston 7 are provided with a sealing ring b5, and the inner and outer walls of the lower joint 11 are provided with a sealing ring c10, so that an annular space formed by the upper joint 1, the lower joint 11, the outer sleeve 2 and the central tube 9 is ensured to be in a sealing state.
The operation procedure of the safety deblocking releasing device comprises the following steps:
(1) preparing a tubular column: assembling a tool string consisting of a safety deblocking releasing device, a tubular column stabilizer, packers and other tools according to design requirements, wherein the tools are in threaded connection with one another, and the tools are in threaded connection with the oil pipe, and the safety deblocking releasing device is positioned at the upper part of a first-stage packer in the tool string or positioned between two stages of packers;
(2) entering a well: running the tool into the well according to the normal design requirement;
(3) starting a safety deblocking releasing device: the oil feeding pipe is pressurized through liquid, the liquid pressure enters an annular closed cavity formed by the outer sleeve 2, the piston 7, the central pipe 9 and the lower connector 11 through a liquid conveying hole 9-4 of the central pipe 9, the liquid pressure acts on the piston 7 to enable the piston 7 to move upwards to firstly shear the starting pin 6, then the piston 7 drives the extruded spring ring 4 to continue moving upwards and releases the locking ring 8, when the piston 7 continues moving upwards to the position where the spring ring 4 reaches the limiting groove 2-2 at the upper end of the outer sleeve 2, the spring ring 4 is restored to the original outer diameter, so that the piston 7 is limited in an annular space at the upper ends of the outer sleeve 2 and the central pipe 9, and at this time, the safety deblocking and releasing device enters a working state;
(4) step-by-step deblocking: lifting the pipe column load, when the lifting force is greater than the deblocking force of the first-stage packer, starting the operation of the safety deblocking and releasing device positioned at the upper part of the second-stage packer, enabling the upper joint 1 to drive the outer sleeve 2 and the lower joint 11 to ascend and form relative displacement with the central pipe 9, when the lower joint 11 ascends to the lifting shoulder 11-1 of the inner wall and hangs the rectangular boss 9-3 of the central pipe 9, the relative displacement is the deblocking stroke provided for the first-stage packer, at the moment, the first-stage packer is deblocked, but the second-stage packer and the following packers do not start deblocking yet, when the pipe column is continuously lifted to enable the second-stage packer to be deblocked, the deblocking stroke is provided by the safety deblocking and releasing device arranged at the upper part of the third-stage packer, and the like, so;
(5) releasing: if the packer cannot be unsealed due to the complex situation in the well, the pipe column is lifted, the upper joint 1 drives the outer sleeve 2 and the lower joint 11 to go upwards, after the slot 11-2 at the upper end part of the lifting shoulder 11-1 of the lower joint 11 is matched with the bolt 9-5 at the lower end part of the rectangular boss 9-3 of the central pipe 9, the pipe column is rotated clockwise, the left-handed thread connection part of the upper joint 1 and the outer sleeve 2 is tripped, and the purpose of tripping the upper pipe column is achieved.
The above description is only a preferred embodiment of the present invention, and the above illustration does not limit the essence of the present invention in any form, and any simple modification or variation of the above embodiments based on the technical essence of the present invention and equivalent embodiments which may be changed or modified to equivalent variations by using the technical essence of the present invention by those of ordinary skill in the art after reading the present description still belong to the technical solution of the present invention without departing from the essence and scope of the present invention.
Claims (9)
1. The utility model provides a safe deblocking release device, it comprises top connection (1), overcoat (2), spring ring (4), actuating pin (6), piston (7), catch (8), center tube (9) and lower clutch (11), its characterized in that: the outer surface of the lower end of the upper connector (1) is connected with an outer sleeve (2) through threads, and the inner surface of the lower end of the outer sleeve (2) is connected with a lower connector (11) through threads; the upper end of the central tube (9) is sleeved on the inner surface of the lower end of the upper joint (1), and the lower end of the central tube (9) is sleeved on the inner surface of the lower end of the lower joint (11); the joint is characterized in that a piston (7) is arranged in an annular space formed between the upper joint (1) and the lower joint (11) by the outer sleeve (2) and the central tube (9), the lower end of the piston (7) is in contact with the upper end of the lower joint (11) and is embedded into the locking ring (8) for fixation, the upper end of the piston (7) is provided with the spring ring (4), the middle part of the piston (7) is provided with the starting pin (6), and one end of the starting pin (6) is inserted into the central tube (9).
2. The device of claim 1, wherein: and a limiting shoulder a (1-1) matched with the central pipe (9) is manufactured on the inner surface of the lower end of the upper joint (1).
3. The device of claim 1, wherein: the inner surface of the lower end part of the lower joint (11) is provided with a lifting shoulder (11-1), and the upper end part of the lifting shoulder (11-1) is provided with a slot (11-2).
4. The device of claim 1, wherein: one end of the outer sleeve (2) close to the upper joint (1) is provided with a pressure relief hole (2-1) and a limiting groove (2-2).
5. The device of claim 1, wherein: the middle part of the central tube (9) is sequentially provided with a trapezoidal boss (9-1), a wedge-shaped groove (9-2) and a rectangular boss (9-3) which are matched with the locking ring (8) from top to bottom, the rectangular boss (9-3) is provided with a liquid transmission hole (9-4), and the lower end part of the rectangular boss (9-3) is provided with a bolt (9-5).
6. The device of claim 1, wherein: the upper end of the piston (7) is provided with a groove (7-1) for installing the spring ring (4), and the lower end is provided with a limiting shoulder b (7-2).
7. The device of claim 1, wherein: and a sealing ring a (3) is arranged on the inner wall of the upper joint (1), a sealing ring b (5) is arranged on the inner wall and the outer wall of the piston (7), and a sealing ring c (10) is arranged on the inner wall and the outer wall of the lower joint (11).
8. The device of claim 1, wherein: the outer surface of the lower end of the upper joint (1) is connected with the outer sleeve (2) through left-hand threads.
9. The device of claim 1, wherein: the device can be located on the upper portion of the first-stage packer and can also be located between the two stages of packers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021317521.7U CN212406646U (en) | 2020-07-08 | 2020-07-08 | Safe deblocking releasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021317521.7U CN212406646U (en) | 2020-07-08 | 2020-07-08 | Safe deblocking releasing device |
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| Publication Number | Publication Date |
|---|---|
| CN212406646U true CN212406646U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021317521.7U Active CN212406646U (en) | 2020-07-08 | 2020-07-08 | Safe deblocking releasing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944434A (en) * | 2021-10-28 | 2022-01-18 | 大庆市润百利科技有限公司 | Pressure-resistant safety short circuit |
-
2020
- 2020-07-08 CN CN202021317521.7U patent/CN212406646U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944434A (en) * | 2021-10-28 | 2022-01-18 | 大庆市润百利科技有限公司 | Pressure-resistant safety short circuit |
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