Jamming-releasing pushing cylinder
By integrally connecting the push-back cap to the top of the piston pillar of the hydraulic piston in the unblocking push-back cylinder, and secondary fixing of the fastening screws and anti-retardant protection of the limit retaining ring, the problem of insufficient strength of the push-back cap connection structure in the prior art is solved, significantly improving the card success rate and service life.
Patent Information
- Application Number
- CN202422248090.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The connection structure between the push-rest cap in the existing unblocking push-rest cylinder and the hydraulic piston is poor, and the risk of the push-rest cap being loose or even falling is easily affected, affecting the success rate and service life of the unblocking.
By integrally connecting the push-back cap to the top of the piston pillar of the hydraulic piston and secondary fixing by fastening screws, the connection stability between the piston seat and the piston pillar is improved.
It effectively improves the strength of the connecting structure between the push-rest cap and the hydraulic piston, reduces the risk of loosening or falling of the push-rest cap, improves the service life and stability of the card push-rest cylinder, and improves the card success rate.
Smart Images
Figure CN223018586U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of logging tool sticking releasing devices, and particularly relates to a sticking releasing push cylinder. Background Art
[0002] The development of offshore oil and gas resources is a hot spot and key point in the current development of the world's marine economy. Offshore oil and gas resources not only have large reserves, but modern science and technology already have great capabilities for their development. The offshore oil and gas industry has developed into a new and leading industry with high output value in the marine economy.
[0003] Currently, a sticking releasing push cylinder is usually installed on a logging tool or a formation tester. When the tool gets stuck in the well, the piston end of the sticking releasing push cylinder extends and acts on the well wall. Through the reaction force between the piston end and the well wall, the position of the tool is adjusted, thereby realizing the sticking release of the tool.
[0004] The sticking releasing push cylinder in the related art usually includes a support seat, a hydraulic cylinder body, a hydraulic piston, and a push cap. The support seat is arranged at the bottom of the hydraulic cylinder body and is used for connecting with the tool. The push cap is threadedly connected to the top of the hydraulic piston. When the hydraulic piston extends, the push cap contacts the well wall, thereby realizing the sticking release of the tool.
[0005] When the tool performs a sticking release operation, the push cap needs to bear a large force. In the related art, the push cap is threadedly connected to the hydraulic piston, so that the connection structure strength between the push cap and the hydraulic piston is relatively poor. After the sticking releasing push cylinder is used for a long time, there is a risk that the push cap is loosened or even dropped, which not only affects the service life and use stability of the sticking releasing push cylinder, but also affects the sticking release success rate and needs to be improved. Summary of the Utility Model
[0006] In order to solve all or part of the above problems, the purpose of the utility model is to provide a sticking releasing push cylinder, which can improve the connection structure strength between the push cap and the hydraulic piston, reduce the risk of the push cap being loosened or even dropped, improve the service life and use stability of the sticking releasing push cylinder, and also improve the sticking release success rate.
[0007] The utility model provides a sticking releasing push cylinder, which includes a support seat, a hydraulic cylinder body, a hydraulic piston, and a push cap. The hydraulic piston includes:
[0008] A piston seat, which is slidably connected to the hydraulic cylinder body;
[0009] A piston column, which is inserted into the hydraulic cylinder body from the top end of the hydraulic cylinder body and is slidably connected to the hydraulic cylinder body;
[0010] Wherein, the bottom of the piston column is detachably connected to the piston seat, and the push cap is integrally connected to the top of the piston column.
[0011] Optionally, the piston seat is threadedly connected to the piston column. A tightening groove for a hexagonal wrench to be inserted is provided at the bottom of the piston seat, and a limiting groove for a hexagonal wrench to be inserted is provided at the top of the push cap. The support seat is threadedly connected to the bottom of the hydraulic cylinder body, and the piston seat can be taken out from the bottom end of the hydraulic cylinder body.
[0012] Optionally, an installation hole is provided through the piston column, and a fastening screw is inserted into the installation hole. A fastening groove for the fastening screw to be threadedly connected is provided on the piston seat.
[0013] Optionally, the fastening screw and the piston seat are coaxial. The installation hole communicates with the tightening groove, and a step groove for the nut of the fastening screw to be inserted is provided at the bottom of the tightening groove.
[0014] Optionally, the pitches of the threads on the piston seat and the fastening screw are different.
[0015] Optionally, a retaining ring is snap-fitted in the step groove. The retaining ring can abut against the nut of the fastening screw to prevent the fastening screw from backing off.
[0016] Optionally, a lifting groove for threaded engagement with an external threaded rod is provided at the top of the push cap, so as to take out the piston column from the top end of the hydraulic cylinder body.
[0017] Optionally, a plurality of mud discharge holes are provided through the edge position at the top of the push cap.
[0018] Optionally, a sealing ring is used to seal between the piston column and the piston seat.
[0019] Optionally, sliding seals are respectively achieved between the hydraulic cylinder body and the piston column, and between the hydraulic cylinder body and the piston seat through sealing rings.
[0020] As can be seen from the above technical solutions, the stuck-release push cylinder provided by the present utility model has the following advantages:
[0021] Since the push cap is integrally formed and connected with the piston column of the hydraulic piston, the connection structural strength between the push cap and the hydraulic piston is effectively improved, the risk of the push cap loosening or even falling off is reduced, the service life and service stability of the stuck-release push cylinder are improved, and the stuck-release success rate can also be improved. At the same time, by providing a split-type hydraulic piston, and the hydraulic piston can be quickly disassembled and assembled, which is convenient for the staff to perform operations such as maintenance and repair of components such as the hydraulic piston. The piston seat is threadedly connected to the piston column, and the two are secondarily fixed by a fastening screw. At the same time, a limiting retaining ring is used to prevent the fastening screw from backing off, effectively improving the connection stability between the piston seat and the piston column, thereby improving the safety and reliability of the hydraulic piston.
[0022] Other features and advantages of the present utility model will be described in the subsequent specification. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings are used to provide a further understanding of the technical solution of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the technical solution of the present utility model, and do not constitute a limitation to the technical solution of the present utility model.
[0024] Figure 1 It is a schematic diagram of the overall structure of the pipe releasing and pushing cylinder in the embodiment of the present utility model;
[0025] Figure 2 It is a sectional view of the pipe releasing and pushing cylinder in the embodiment of the present utility model.
[0026] Description of the reference numerals in the drawings:
[0027] 1. Support base; 2. Hydraulic cylinder body; 3. Hydraulic piston; 31. Piston seat; 32. Piston column; 4. Pushing cap; 5. Tightening groove; 6. Limiting groove; 7. Mounting hole; 8. Fastening screw; 9. Fastening groove; 10. Step groove; 11. Anti-backoff retaining ring; 12. Pulling groove; 13. Mud discharging hole; 14. Sealing ring; 15. Sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] To make the purpose, technical solution and advantages of the present utility model clearer and more understandable, the embodiments of the present utility model will be described in detail below with reference to the drawings. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined arbitrarily with each other.
[0029] As Figure 1 、 Figure 2 shown in the embodiment of the present utility model, a pipe releasing and pushing cylinder is disclosed in this embodiment, which includes a support base 1, a hydraulic cylinder body 2, a hydraulic piston 3 and a pushing cap 4. The support base 1 is threadedly connected to the bottom of the hydraulic cylinder body 2, and the support base 1 is used to connect with the logging instrument.
[0030] In one embodiment, as Figure 1 、 Figure 2 shown, the hydraulic piston 3 includes a piston seat 31 and a piston column 32. The piston seat 31 is slidably connected inside the hydraulic cylinder body 2. The piston column 32 is inserted into the inside of the hydraulic cylinder body 2 from the top of the hydraulic cylinder body 2 and is slidably connected to the hydraulic cylinder body 2. At the same time, the bottom of the piston column 32 is detachably connected to the piston seat 31, and the pushing cap 4 is integrally connected to the top of the piston column 32.
[0031] In the pipe sticking pushing cylinder of this embodiment, since the pushing cap 4 is integrally formed and connected with the piston column 32 of the hydraulic piston 3, the connection structure strength between the pushing cap 4 and the hydraulic piston 3 is effectively improved, the risk of the pushing cap 4 loosening or even falling off is reduced, the service life and use stability of the pipe sticking pushing cylinder are improved, and the pipe sticking release success rate can also be increased.
[0032] In one embodiment, as Figure 1 , Figure 2 shown, the top of the piston seat 31 can be inserted into the bottom of the piston column 32, and the piston seat 31 is threadedly connected to the piston column 32. At the same time, a tightening groove 5 for a hexagonal wrench to be inserted is provided at the bottom of the piston seat 31, and a limiting groove 6 for a hexagonal wrench to be inserted is provided at the top of the pushing cap 4.
[0033] In one embodiment, as Figure 1 , Figure 2 shown, an installation hole 7 is penetrated through the central position of the piston column 32, a fastening screw 8 is inserted into the installation hole 7, and a fastening groove 9 for the fastening screw 8 to be threadedly connected is provided on the piston seat 31. At the same time, the fastening screw 8 and the piston seat 31 are coaxial, the installation hole 7 communicates with the tightening groove 5, and a step groove 10 for the nut of the fastening screw 8 to be inserted is provided at the bottom of the tightening groove 5.
[0034] In one embodiment, as Figure 1 , Figure 2 shown, the pitches of the threads on the piston seat 31 and the fastening screw 8 are different to play a role in preventing loosening and improve the connection reliability between the piston column 32 and the piston seat 31. At the same time, a retaining ring 11 is snap-fitted in the step groove 10, and the retaining ring 11 can abut against the nut of the fastening screw 8 to play a role in preventing the fastening screw 8 from backing off.
[0035] When the pipe sticking pushing cylinder needs to be assembled, the piston seat 31 is inserted into the hydraulic cylinder body 2, and the piston column 32 is inserted into the hydraulic cylinder body 2. Subsequently, a hexagonal wrench is inserted into the tightening groove 5, and another hexagonal wrench is inserted into the limiting groove 6, and the piston seat 31 is rotated until the piston seat 31 and the piston column 32 are threadedly connected. Immediately afterwards, the hexagonal wrench inserted into the tightening groove 5 is removed, and then the fastening screw 8 is tightened by a bolt wrench. Then, the retaining ring 11 is snap-fitted into the step groove 10. Finally, the support seat 1 is connected to the hydraulic cylinder body 2, and the assembly of the pipe sticking pushing cylinder can be completed.
[0036] In this embodiment, the piston column 32 can be taken out from the upper end of the hydraulic cylinder body 2. After the support seat 1 is disassembled, the piston seat 31 can be taken out from the lower end of the hydraulic cylinder body 2. The split hydraulic piston 3 is adopted, which is convenient for operations such as the repair and maintenance of the hydraulic piston 3 and can reduce the repair and maintenance costs.
[0037] In one embodiment, as Figure 1, Figure 2 As shown in Figure 2 , a lifting groove 12 for threaded engagement with an external threaded rod is provided at the top of the pushing cap 4, so that the staff can remove the piston rod 32 from the top end of the hydraulic cylinder body 2 through the threaded rod. In this embodiment, the lifting groove 12 is provided at the bottom of the limiting groove 6. Of course, it can also be provided at other positions on the top of the pushing cap 4.
[0038] In one embodiment, as Figure 1 , Figure 2 shown, a plurality of mud discharge holes 13 are provided through the edge position of the top of the pushing cap 4, so that the pushing cap 4 can smoothly abut against the wellbore to achieve smooth sticking release.
[0039] In one embodiment, as Figure 1 , Figure 2 shown, the piston rod 32 and the piston seat 31 are sealed by a sealing ring 14. In this embodiment, two annular grooves are provided on the outer side wall of the top of the piston seat 31, and a sealing ring 14 is respectively clamped and fitted in each annular groove. When the top of the piston seat 31 is inserted into the groove at the bottom of the piston rod 32, the sealing ring 14 can tightly abut against the inner wall of the groove at the bottom of the piston rod 32 to achieve sealing.
[0040] In one embodiment, as Figure 1 , Figure 2 shown, the hydraulic cylinder body 2 and the piston rod 32, and the hydraulic cylinder body 2 and the piston seat 31 are respectively slidably sealed by a sealing ring 15. In this embodiment, an annular groove is respectively provided at the upper end of the hydraulic cylinder body 2 and the bottom of the piston seat 31, and a sealing ring 15 is respectively clamped and fitted in each annular groove, and the sealing ring 15 tightly abuts against the outer side wall of the piston rod 32 or the inner side wall of the hydraulic cylinder body 2 to achieve sliding sealing.
[0041] As described above, the pushing cap 4 in the hydraulic pushing cylinder is integrally formed and connected with the piston rod 32 of the hydraulic piston 3, effectively improving the connection structure strength between the pushing cap 4 and the hydraulic piston 3, reducing the risk of loosening or even falling of the pushing cap 4, improving the service life and use stability of the sticking release pushing cylinder, and also improving the sticking release success rate.
[0042] At the same time, by providing a split-type hydraulic piston 3, and the hydraulic piston 3 can be quickly disassembled and assembled, which is convenient for the staff to perform operations such as maintenance and repair of components such as the hydraulic piston 3. The piston seat 31 is threadedly connected with the piston rod 32, and the two are secondarily fixed by fastening screws 8. At the same time, a limit retaining ring is used to protect against the loosening of the fastening screws 8, effectively improving the connection stability between the piston seat 31 and the piston rod 32, thereby improving the safety and reliability of the hydraulic piston 3.
[0043] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this utility model should have the ordinary meanings understood by those skilled in the art to which this utility model belongs.
[0044] In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of this utility model, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.
[0045] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of this utility model, rather than to limit it; although this utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and the description of this utility model. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. This utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.
Claims
1. A jam-releasing push-pull cylinder, comprising a support seat (1), a hydraulic cylinder body (2), a hydraulic piston (3) and a push-pull cap (4), characterized in that: The hydraulic piston (3) comprises: A piston seat (31) is slidably connected in the hydraulic cylinder body (2); A piston rod (32) is inserted into the hydraulic cylinder body (2) from the top end thereof and is slidably connected to the hydraulic cylinder body (2); The bottom of the piston column (32) is detachably connected to the piston seat (31), and the push cap (4) is integrally connected to the top of the piston column (32).
2. The jam-releasing push cylinder according to claim 1, characterized in that: The piston seat (31) is threadedly connected to the piston column (32); the bottom of the piston seat (31) is provided with a tightening groove (5) for a hexagonal wrench to be inserted into; the top of the push cap (4) is provided with a limiting groove (6) for a hexagonal wrench to be inserted into; the support seat (1) is threadedly connected to the bottom of the hydraulic cylinder body (2), and the piston seat (31) can be removed from the bottom end of the hydraulic cylinder body (2).
3. The jam-releasing push cylinder according to claim 2, characterized in that: The piston column (32) is provided with a mounting hole (7) through which a fastening screw (8) is inserted. The piston seat (31) is provided with a fastening groove (9) for threaded connection of the fastening screw (8).
4. The jam-releasing push cylinder according to claim 3, characterized in that: The fastening screw (8) is coaxial with the piston seat (31), the mounting hole (7) is connected with the tightening groove (5), and the bottom of the tightening groove (5) is provided with a step groove (10) for the nut of the fastening screw (8) to be inserted.
5. The jam-releasing push cylinder according to claim 4, characterized in that: The pitches of the threads on the piston seat (31) and the fastening screw (8) are different.
6. The jam-releasing push cylinder according to claim 4, characterized in that: A backstop ring (11) is clamped in the step groove (10), and the backstop ring (11) can abut against the nut of the fastening screw (8) to prevent the fastening screw (8) from backing out.
7. The jam-releasing push cylinder according to claim 1, characterized in that: The top of the push cap (4) is provided with a pulling groove (12) for threaded engagement with an external threaded rod, so as to remove the piston rod (32) from the top end of the hydraulic cylinder body (2).
8. The jam-releasing push cylinder according to claim 1, characterized in that: A plurality of mud discharge holes (13) are provided through the edge of the top of the pushing cap (4).
9. The jam-releasing push cylinder according to claim 1, characterized in that: The piston column (32) and the piston seat (31) are sealed via a sealing ring (14).
10. The jam-releasing push cylinder according to claim 1, characterized in that: Sliding seals are achieved between the hydraulic cylinder body (2) and the piston column (32), and between the hydraulic cylinder body (2) and the piston seat (31) respectively through sealing rings (15).