CN216110573U - Special anti-drop device for screw pump - Google Patents
Special anti-drop device for screw pump Download PDFInfo
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- CN216110573U CN216110573U CN202122906068.4U CN202122906068U CN216110573U CN 216110573 U CN216110573 U CN 216110573U CN 202122906068 U CN202122906068 U CN 202122906068U CN 216110573 U CN216110573 U CN 216110573U
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- jaw
- sucker rod
- screw pump
- screw
- upper joint
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Abstract
The utility model discloses a special anti-falling device for a screw pump, which comprises an upper joint arranged at the lower end of a sucker rod, wherein a second jaw is arranged at one end, far away from the sucker rod, of the upper joint; the utility model has reasonable design and novel structure, adopts the sucker rod to transmit torque during positive working, releases the torque of the underground sucker rod by releasing the first jaw and the second jaw during reverse working without transmitting the torque, effectively prevents the release of the loosening torque generated by the sucker rod string for the screw pump, ensures the connection state of the whole sucker rod string, and can reduce the breakage rate of the sucker rod, prolong the pump detection period and reduce the oil extraction cost.
Description
Technical Field
The utility model relates to the technical field of screw pumps, in particular to a special anti-drop device for a screw pump.
Background
The breakage and the falling of the sucker rod string are one of the faults which often occur in the production process of the pumping well and are also an important factor which influences the normal production and the oil extraction time efficiency of the pumping well. At present, the on-site adopted sucker rod anti-drop device can only be suitable for a sucker rod string used for a common sucker rod, and the torsion of the sucker rod string is compensated and buffered by the clearance of the anti-drop device, so that the whole circle of the screw pump is not taken off but has no effect, and the problem of anti-drop of the sucker rod string of the screw pump well cannot be solved. Therefore, we improve the above and propose a special anti-drop device for screw pump.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model provides the special anti-drop device for the screw pump.
In order to solve the technical problems, the utility model provides the following technical scheme:
the utility model relates to a special anti-falling device for a screw pump, which comprises an upper joint arranged at the lower end of a sucker rod, wherein a second jaw is arranged at one end, far away from the sucker rod, of the upper joint, a nut is arranged inside the upper joint, a mandrel is arranged inside the nut, a first jaw matched with the second jaw is arranged outside the mandrel, and a spring in contact with the first jaw is sleeved on the mandrel.
According to a preferable technical scheme of the utility model, the outer wall of the mandrel is provided with a key, and the inner wall of the first jaw is provided with a key groove matched with the key.
As a preferable technical solution of the present invention, a first screw is provided between the mandrel and the first jaw.
As a preferable technical solution of the present invention, the core shaft and the nut are connected by a third screw through a threaded connection.
In a preferred embodiment of the present invention, the second jaw is connected to the upper joint by a screw and connected to the upper joint by a second screw.
As a preferable technical solution of the present invention, a wear reducing plate is provided between the nut and the second jaw.
The utility model has the beneficial effects that:
1. when the special anti-drop device for the screw pump is used, the upper joint of the anti-drop device for the sucker rod is connected to the lower end of a sucker rod column, and when the screw pump works normally, the second jaw drives the first jaw to rotate to drive the sucker rod to transmit torque to the screw pump; when the screw pump stops rotating, under the action of the liquid potential energy of the pipe column and the torsional elastic deformation of the sucker rod, a reverse torque is generated, the first jaw and the second jaw of the anti-tripping device are disengaged, the torque is not transmitted, the torque of the underground sucker rod is released, the reverse torque is eliminated, and the reverse tripping of the sucker rod is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic structural view of the anti-drop device specially used for the screw pump of the utility model.
In the figure: 1. a mandrel; 2. a spring; 3. a first jaw; 4. a first screw; 5. a key; 6. a second jaw; 7. a second screw; 8. reducing the grinding piece; 9. a third screw; 10. a nut; 11. and (4) an upper connector.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in figure 1, the anti-drop device special for the screw pump comprises an upper joint 11 arranged at the lower end of a sucker rod, wherein a second jaw 6 is arranged at one end, far away from the sucker rod, of the upper joint 11, a nut 10 is arranged inside the upper joint 11, a core shaft 1 is arranged inside the nut 10, a first jaw 3 matched with the second jaw 6 is arranged outside the core shaft 1, and a spring 2 in contact with the first jaw 3 is sleeved on the core shaft 1.
Wherein, the outer wall of dabber 1 is equipped with key 5, and the inner wall of first dog 3 has been seted up with key 5 assorted keyway, can install dabber 1 with first dog 3 on, easy operation also can drive dabber 1 when first dog 3 rotates and rotate.
Wherein, be equipped with first screw 4 between dabber 1 and the first dog 3, can further connect dabber 1 and first dog 3, also can fix a position the screwing up dabber 1 and first dog 3, avoid dabber 1 and first dog 3 to take place relative rotation, strengthened the stability that dabber 1 and first dog 3 are connected.
Wherein, dabber 1 and nut 10 are connected through threaded connection and through third screw 9, are convenient for connect dabber 1 and nut 10, and third screw 9 fixes a position dabber 1 and nut 10 and screws up, has avoided dabber 1 and nut 10 to take place relative rotation.
The second jaw 6 is connected with the upper joint 11 through threads and is connected with the upper joint 11 through the second screw 7, so that the second jaw 6 is conveniently connected with the upper joint 11, the second screw 7 can be used for positioning and screwing the second jaw 6 and the upper joint 11, relative rotation of the second jaw 6 and the upper joint 11 is avoided, and the connection stability of the second jaw 6 and the upper joint 11 is improved.
Wherein, be equipped with between nut 10 and the second dog 6 and subtract abrasive disc 8, the setting of abrasive disc 8 can prevent that nut 10 and second dog 6 from rubbing.
The working principle is as follows: the special anti-drop device for the screw pump is characterized in that a second jaw 6 is arranged at one end, far away from a sucker rod, of an upper joint 11, a nut 10 is arranged inside the upper joint 11, a core shaft 1 is arranged inside the nut 10, a first jaw 3 matched with the second jaw 6 is arranged outside the core shaft 1, when the special anti-drop device for the screw pump is used, the upper joint 11 of the anti-drop device for the sucker rod is connected to the lower end of a sucker rod column, and when the screw pump works normally, the second jaw 6 drives the first jaw 3 to rotate to drive the sucker rod to transmit torque to the screw pump; when the screw pump stops rotating, under the action of the liquid potential energy of the pipe column and the torsional elastic deformation of the sucker rod, a reverse torque is generated, the first jaw 3 and the second jaw 6 of the anti-tripping device are disengaged, the torque is not transmitted, the torque of the underground sucker rod is released, the reverse torque is eliminated, and the reverse tripping of the sucker rod is avoided.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The special anti-falling device for the screw pump comprises an upper joint (11) arranged at the lower end of a sucker rod and is characterized in that a second jaw (6) is arranged at one end, far away from the sucker rod, of the upper joint (11), a nut (10) is arranged inside the upper joint (11), a mandrel (1) is arranged inside the nut (10), a first jaw (3) matched with the second jaw (6) is arranged outside the mandrel (1), and a spring (2) in contact with the first jaw (3) is sleeved on the mandrel (1).
2. The anti-drop device special for the screw pump according to claim 1, wherein the outer wall of the mandrel (1) is provided with a key (5), and the inner wall of the first jaw (3) is provided with a key groove matched with the key (5).
3. The thread-off prevention device special for the screw pump according to claim 1, wherein a first screw (4) is arranged between the mandrel (1) and the first jaw (3).
4. Anti-thread-off device special for screw pumps according to claim 1, characterized in that the mandrel (1) and the nut (10) are connected by a thread and connected by a third screw (9).
5. Anti-thread-off device, in particular for screw pumps, according to claim 1, characterized in that said second jaw (6) is connected by means of a thread with the upper joint (11) and is connected via a second screw (7).
6. Anti-drop device special for screw pump according to claim 1, characterized in that an anti-drop disc (8) is arranged between the nut (10) and the second jaw (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122906068.4U CN216110573U (en) | 2021-11-25 | 2021-11-25 | Special anti-drop device for screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122906068.4U CN216110573U (en) | 2021-11-25 | 2021-11-25 | Special anti-drop device for screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216110573U true CN216110573U (en) | 2022-03-22 |
Family
ID=80718851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122906068.4U Active CN216110573U (en) | 2021-11-25 | 2021-11-25 | Special anti-drop device for screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216110573U (en) |
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2021
- 2021-11-25 CN CN202122906068.4U patent/CN216110573U/en active Active
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