CN109611037B

CN109611037B - Automatic elevator for sucker rod

Info

Publication number: CN109611037B
Application number: CN201910056460.9A
Authority: CN
Inventors: 杨颖辉; 邹龙庆; 王敏; 付海龙; 唐友福; 祝娟; 陈桂娟
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2019-01-22
Filing date: 2019-01-22
Publication date: 2024-04-09
Anticipated expiration: 2039-01-22
Also published as: CN109611037A

Abstract

The utility model provides an automatic elevator of sucker rod relates to oil and gas trade specialized tool, it has last spout (5) and lower spout (6) to open on the wall of casing (2), casing (2) inner wall is equipped with ramp (7) and lower inclined plane (8), open the lower extreme of casing (2) has horn-like guiding mouth (9), the jack catch includes jaw body (10), lower jaw body (11) and arched beam (12), be equipped with the inclined plane on last jaw body (10) and lower jaw body (11) respectively, and contact cooperation through last inclined plane (7) and lower inclined plane (8) of its inclined plane and casing (2) respectively, the upper and lower end of arched beam (12) stretch into with last jaw body (10) and lower jaw body (11) fixed connection by last spout (5) and lower spout (6), go up jaw body (10) and be connected through the round pin axle (13) of horizontal setting and actuating part (3) of drive arrangement (4), be equipped with on the jack catch and make it keep outwards open spring (14). The structure intensity is big, and the security is high, does not need manual direct operation.

Description

Automatic elevator for sucker rod

Technical Field

The invention relates to a special tool in the petroleum and natural gas industry, which is suitable for automatic well repair operation or conventional minor well repair operation, in particular to a sucker rod elevator.

Background

The sucker rod elevator is an important tool for lifting and lowering the sucker rod in well repairing operation. At present, clamping work of the elevator is completed through manual operation of workers, and the defects of low working efficiency, long clamping time and low safety coefficient exist. Various well repair operations of the oil field are developed to an automatic direction, and are irreversible large environments and large trends. In practical application, market available products and searched publications, no sucker rod elevator products capable of realizing an automatic clamping function exist.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the sucker rod elevator can realize an automatic clamping function.

The technical scheme of the invention is as follows: the automatic elevator of sucker rod, the upper end is equipped with connecting portion, the automatic elevator of sucker rod still includes the casing, jack catch and lower extreme are equipped with the drive arrangement of actuating portion that can reciprocate, the casing is the tube-shape body, it has last spout and lower spout to open on the wall of casing, shells inner wall is equipped with upper inclined plane and lower inclined plane, casing upper end and drive arrangement fixed connection, open the lower extreme of casing has loudspeaker-shaped guide mouth, the jack catch includes the upper jaw body, lower jaw body and bow-shaped roof beam, be equipped with the inclined plane on upper jaw body and the lower jaw body respectively, upper jaw body and lower jaw body are arranged in the casing and respectively through its inclined plane and the upper inclined plane and lower inclined plane contact cooperation of casing, the bow-shaped roof beam is arranged in the casing outside, its upper and lower extreme stretch into in the casing by last spout and the lower spout of casing respectively with upper jaw body and lower jaw body fixed connection, open on the upper jaw body of jack catch has the shaft hole and be connected through the round pin axle of horizontal setting and actuating portion of drive arrangement, and the jack catch can be followed transversely and be equipped with and make it keep outwards opening spring, make actuating portion move down and realize the action of stretching up and down along the inclined plane when moving.

The invention has the technical effects that: the structure intensity is big, and the security is high, does not need manual direct operation. The remote control work of the sucker rod elevator is realized for the first time, and similar functional products are not found in searching and literature. When in use, the sucker rod string is hung under the large hook of the workover rig and used for replacing a conventional sucker rod elevator, and the coupling at the upper end of the sucker rod string is grabbed in workover operation to lift and lower the sucker rod string. Compared with the traditional manual operation elevator, the elevator can finish the operation by remote operation, avoids manual direct contact with the sucker rod, and is an important tool indispensable for the automation of the oil field well repairing operation.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view showing the structure of a spring according to embodiment 1 of the present invention;

FIG. 3 is a schematic view of a spring seat according to embodiment 1 of the present invention;

FIG. 4 is a side view schematically showing a spring seat according to embodiment 1 of the present invention;

FIG. 5 is a schematic view showing the structure of a spring portion according to embodiment 2 of the present invention;

fig. 6 is a schematic structural view of a spring portion according to embodiment 3 of the present invention.

Detailed Description

As shown in fig. 1, the automatic elevator for the sucker rod is provided with a connecting part 1 for connecting a large hook of a workover rig at the upper end, the automatic elevator for the sucker rod further comprises a shell 2, a claw and a driving device 4 of which the lower end is provided with an executing part 3 capable of moving up and down, the shell 2 is a cylindrical body, an upper chute 5 and a lower chute 6 are formed in the wall of the shell 2, an upper inclined plane 7 and a lower inclined plane 8 are arranged on the inner wall of the shell 2, the upper end of the shell 2 is fixedly connected with the driving device 4, a horn-shaped guide opening 9 is formed in the lower end of the shell 2, the claw comprises an upper claw body 10, a lower claw body 11 and a bow beam 12, inclined planes are respectively arranged on the upper claw body 10 and the lower claw body 11, the upper claw body 11 are respectively in contact fit with the upper inclined plane 7 and the lower inclined plane 8 of the shell 2, the bow beam 12 is arranged outside the shell 2, the upper end and the lower end of the bow beam 2 stretches into the shell 2 through the upper chute 5 and the lower chute 6 respectively, the claw body 10 and the lower claw body 11 are fixedly connected, the claw is symmetrically arranged in the shell 2, the upper claw body 10 and the lower claw body 10 are provided with a driving pin shaft hole 13 which can move transversely and can move along the upper and lower inclined plane 4, and the upper claw body 4 is transversely arranged, and the upper claw body 13 can move transversely and the upper claw body is driven by the upper claw body and the upper claw body 4 is provided with a pin shaft hole 13 and the upper driving device and the upper claw body 4 and can move transversely and the lower claw body 13 is driven and can move transversely and the upper claw body 4. The claw is used for matching with a sucker rod coupling (an operation object), and the shape of the lower end of the claw is matched with the shape of the coupling.

A limit part 16 for preventing the sucker rod from ascending is arranged above the lower claw body 11 in the shell 2.

The inner wall of the shell 2 is provided with a limiting block 17 beside the clamping jaw, and the limiting block is used for preventing the sucker rod from being deflected to one side from the gap of the clamping jaw when the clamping jaw is opened.

Because the gap between the two half claw assemblies is larger than the outer diameter of the sucker rod coupling when the two half claw assemblies are at the maximum opening degree, the limiting part 16 and the limiting block 17 are fixedly arranged on the shell 2 in order to prevent the sucker rod coupling from excessively ascending or being deviated to one side to clamp the claws so that the claw cannot be closed; this defines the upper limit position of the sucker rod coupling when the elevator is down.

The upper inclined surface 7 and/or the lower inclined surface 8 are/is detachably and movably connected with the shell 2.

The connection part 1 is provided at the upper end of the driving device 4.

The driving device 4 can be one of a hydraulic cylinder, a linear motor, a ball screw pair and a screw nut pair.

The lower end of the guide opening 9 is connected with an outwardly expanding guide head 18. In automatic operation, since the vertical projection point of the large hook of the workover rig is not easy to accurately align with the center of the wellhead, the guide head 18 is a necessary component; while in manual operation, the elevator can be pushed by a human hand, and the guide head 18 is an optional component.

Several embodiments of the spring 14:

example 1:

as shown in fig. 2, 3 and 4, the spring 14 is an arc elastic sheet, the spring 14 is fixed on the outer wall of the shell 2 through a spring seat 15, the extended part of the spring 14 is abutted against the arched beam 12, and the arched beam 12 can slide up and down relative to the spring 14. The spring 14 is pressed at both ends against the outer surface of the housing 2 and the middle part is pressed against the inner surface of the arched beam 12. The spring 14 slides on the inner surface of the arched beam 12 and always forms an outward thrust to the arched beam 12, so that the left and right lock components are pushed to the maximum opening degree at the upper end of the stroke, and the return action is completed.

Example 2:

as shown in fig. 5, the spring 14 is an annular elastic piece, and the spring 14 is sleeved outside the casing 2 and is fixed and supported between the arched beams 12.

Example 3:

as shown in fig. 6, the springs 14 are coil springs, the arcuate beams 12 are provided with spring fixing portions 19 extending to both sides, and the springs 14 are fixed between the spring fixing portions 19 of the arcuate beams 12 at the periphery of the housing 2, so that the arcuate beams 12 are subjected to outward elastic force.

The integral working principle of the elevator is as follows:

when the driving device is positioned at the contracted end position, the clamping jaw is positioned at the maximum opening position at two sides under the influence of the spring component, and the elevator is in an opening state. At this time, the sucker rod coupling and the sucker rod end head can be guided to the head from the lower end of the elevator and the guiding port can be lifted to the lower part of the limiting part (note: the actual operation is to put down the workover rig hook to sleeve the elevator into the fixed sucker rod coupling).

The executing part extends out to push the claw assembly to move downwards; the inclined surfaces of the clamping jaws slide on the surfaces of the upper inclined surface and the lower inclined surface simultaneously to push the two half clamping jaws to act towards the center; when the executing part reaches the stroke bottom dead center, the two half claws are closed, the upper end part of the sucker rod (containing the coupling) is contained in the reduced inner cavity and cannot be separated, and the closing action of the elevator is completed.

The executing part is retracted to pull the claw assembly to ascend; under the action of the tensile force to the two sides provided by the spring assembly, the clamping jaw slides outwards along the inclined plane, and the opening action is completed when the clamping jaw reaches the top dead center of the stroke. The elevator in the open state has a lower cavity sufficient for free access of the upper end of the sucker rod (including the coupling).

Claims

1. The automatic elevator for the sucker rod is characterized in that the upper end of the automatic elevator for the sucker rod is provided with a connecting part (1), the automatic elevator for the sucker rod further comprises a shell (2), a claw and a driving device (4) of an executing part (3) capable of moving up and down are arranged at the lower end of the automatic elevator for the sucker rod, the shell (2) is a cylindrical body, an upper chute (5) and a lower chute (6) are arranged on the wall of the shell (2), an upper inclined plane (7) and a lower inclined plane (8) are arranged on the inner wall of the shell (2), the upper end of the shell (2) is fixedly connected with the driving device (4), a horn-shaped guide opening (9) is arranged at the lower end of the shell (2), the claw comprises an upper claw body (10), a lower claw body (11) and a bow beam (12), inclined planes are respectively arranged on the upper claw body (10) and the lower claw body (11), the upper claw body (10) and the lower claw body (11) are arranged in the shell (2) and are respectively in contact with the upper inclined plane (7) and the lower inclined plane (8) of the shell (2) through the inclined plane, the upper claw body (12) is arranged outside the shell (2), the upper end and the lower claw body (2) is symmetrically arranged in the upper claw body (5) and the lower chute (2), the upper claw body (10) of the claw is provided with a shaft hole and is connected with the actuating part (3) of the driving device (4) through a pin shaft (13) which is transversely arranged, the claw can transversely move along the pin shaft (13), and the claw is provided with a spring (14) which enables the claw to be kept outwards open, so that when the actuating part (3) of the driving device (4) moves up and down, the claw can be driven to move up and down along the upper inclined plane (7) and the lower inclined plane (8) and simultaneously realize the folding and unfolding action.

2. The automatic elevator for the sucker rod according to claim 1, wherein the spring (14) is an arc-shaped elastic sheet, the spring (14) is fixed on the outer wall of the shell (2) through a spring seat (15), the extending part of the spring (14) is abutted with the arched beam (12), and the arched beam (12) can slide up and down relative to the spring (14).

3. The automatic elevator for sucker rods according to claim 1, wherein the springs (14) are annular elastic pieces, and the springs (14) are sleeved outside the shell (2) and fixed and supported between the arched beams (12).

4. The automatic elevator for sucker rods according to claim 1, wherein the springs (14) are coil springs, spring fixing parts (19) extending towards two sides are arranged on the arched beams (12), and the springs (14) are fixed between the spring fixing parts (19) of the two arched beams (12) at the periphery of the shell (2), so that the arched beams (12) are subjected to outward elastic force.

5. The automatic elevator for the sucker rod according to claim 1, wherein a limiting part (16) for preventing the sucker rod from ascending is arranged above the lower claw body (11) in the shell (2).

6. An automatic elevator for sucker rod according to claim 1 or 5, characterized in that a limiting block (17) for preventing the sucker rod from being deviated to one side from the gap of the clamping jaw in the open state of the clamping jaw is arranged on the inner wall of the shell (2) beside the clamping jaw.

7. The automatic elevator for the sucker rod according to claim 1, wherein the upper inclined surface (7) and/or the lower inclined surface (8) are/is detachably and movably connected with the shell (2).

8. An automatic elevator for sucker rod according to claim 1, characterized in that the connecting part (1) is arranged at the upper end of the driving device (4).

9. The automatic elevator for sucker rods according to claim 1 or 8, wherein the driving device (4) is one of a hydraulic cylinder, a linear motor, a ball screw pair and a screw nut pair.

10. The automatic elevator for the sucker rod according to claim 1, wherein the lower end of the guide port (9) is connected with a guide head (18) which expands outwards.