A screw pump light rod anti-reversing tool

Abstract

The utility model discloses a kind of screw rod pump light rod anti-reversing tools, it is related to screw rod pump ground driving device reverse rotation protection device technical field, including first slip bowl, second slip bowl, slide bar and rotating rod, first slip bowl and second slip bowl are oppositely arranged, and the opposite surface of both is equipped with slip;Second slip bowl back left and right sides are separately equipped with horizontal first sleeve and second sleeve, first sleeve and second sleeve left and right side by side are arranged, are connected by connecting rod;Slide bar is slidably installed in second sleeve, its front end penetrates second slip bowl and is fixedly connected with first slip bowl, its rear end is equipped with handle;Rotating rod is rotatably installed in first sleeve, its front end penetrates second slip bowl, its rear end is connected with driving assembly;Rotating rod front end is equipped with external thread, and first slip bowl is equipped with thread hole corresponding with rotating rod;This tool is realized in the process of locking light rod, and maintenance personnel is away from light rod when operating, and will not be pinched.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw pump ground drive device reverse rotation protection device technical field, concretely relates to a screw pump polished rod anti -reversing tool. BACKGROUND

[0002] Screw pump as a kind of rod pump, it has wide application in the field of artificial lifting of oil. Screw pump production system is "ground drive device-polished rod (sucker rod)-screw pump" type rod pumping system.

[0003] When screw pump ground drive device normal shutdown or due to sand, dead oil etc. cause pump jamming shutdown, the elastic deformation stored in rod string will be released quickly, make rod string reverse quickly;At the same time, under the action of the liquid in the tubing and the outer delivery pipeline and the well fluid pressure difference in casing, screw pump rotor and connecting rod string reverse quickly. The greater the oil jacket pressure difference, the faster the rod string reverse speed;In addition, if the screw pump displacement is large, the rod string will store a lot of potential energy, which will cause the rod string to reverse violently. In the process of polished rod reverse, the brake system of screw pump ground drive device will continue to brake to consume the reverse potential energy in the sucker rod, until the reverse stops.

[0004] After polished rod reverse stops, there will still be a certain reverse torque in the rod string, and the knocking or vibration generated during the maintenance process of the operating personnel will cause the polished rod to reverse again, which is easy to cause personal injury to the surrounding personnel.

[0005] Chinese patent CN205895161U discloses a kind of anti-reverse device of screw pump sucker rod, including pawl disc, pawl, torsional spring, ratchet and clamp hoop;Pawl disc is equipped with a plurality of circular array distribution pawls;Pawl and pawl disc are equipped with torsional spring;Pawl disc one side is equipped with ratchet;Ratchet is equipped with recess, and when pawl disc counterclockwise rotates, pawl is in the recess of ratchet;Ratchet and clamp hoop are connected;Brake rubber sheet is further equipped between ratchet and clamp hoop;When the device is manually released torque, it needs to be close to the sucker rod to loosen locking nut, which is easy to cause personal injury to the operating personnel.

[0006] In view of the above reasons, it is necessary to further develop a new type of protection device, which is used to lock polished rod and limit polished rod reverse before maintenance, to provide safety protection for operating personnel. UTILITY MODEL CONTENT

[0007] The utility model aims at the defects of prior art, and provides a kind of screw pump polished rod anti-reversing tool.

[0008] The utility model discloses a technical scheme is: a screw rod pump light rod anti -reversing tool, including first slip bowl, second slip bowl, slide and swivel rod, first slip bowl and second slip bowl are opposite and are installed with slip on the opposite face of two, when two slips close, the inside cooperation of two forms the slip through -hole for light rod, the left and right sides of second slip bowl back are equipped with horizontal first sleeve and second sleeve respectively, first sleeve and second sleeve are left and right side by side and set up, and two are connected through connecting rod, the utility model discloses the following advantage:

[0009] The slide is slidably installed in the second sleeve, the front end of the slide penetrates the second slip bowl and is fixedly connected with the first slip bowl, and the rear end of the slide is provided with a handle.

[0010] Preferably, the slide is a square rod.

[0011] Preferably, the inner wall of the slip is processed with a plurality of vertical grooves.

[0012] Preferably, the front end of the swivel rod is a conical head.

[0013] Preferably, the driving assembly comprises a bracket, a worm wheel and a worm that are engaged and connected, the worm wheel is fixedly sleeved on the swivel rod, the worm is rotatably installed on the bracket, and one end of the worm is connected with a hand wheel.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] After the ground driving device is stopped, the light rod is locked by using the tool, and a safe working environment is provided for maintenance personnel; in the process of locking the light rod, the tool is rotated by the driving assembly, and the maintenance personnel is far away from the light rod and will not be injured; since the worm and worm wheel mechanism has self-locking property, the swivel rod will not be reversed after being rotated to the position, and the stability of the tool is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the perspective view of the utility model;

[0017] Figure 2 It is the top view of the utility model;

[0018] Figure 3 It is the position schematic view of the light rod and the support frame.

[0019] In the diagram: 1. First slip seat, 101. Threaded hole, 2. Second slip seat, 3. Slip, 301. Vertical groove, 4. First sleeve, 5. Second sleeve, 6. Connecting rod, 7. Slide rod, 8. Handle, 9. Rotating rod, 901. Conical head, 10. Worm gear, 11. Worm, 12. Bracket, 13. Handwheel. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0021] Reference Figures 1-2 As shown, a screw pump guide rod anti-reverse tool includes a first slip seat 1, a second slip seat 2, a slide rod 7, and a rotating rod 9. The first slip seat 1 and the second slip seat 2 are arranged opposite each other, and slips 3 are installed on their opposite surfaces. When the two slips 3 are closed, their inner sides cooperate to form a through hole for the guide rod to pass through. The left and right sides of the back of the second slip seat 2 are respectively provided with a horizontal first sleeve 4 and a second sleeve 5. The first sleeve 4 and the second sleeve 5 are arranged side by side and connected by a connecting rod 6.

[0022] The slide rod 7 is slidably installed inside the second sleeve 5, with its front end passing through the second slip seat 2 and fixedly connected to the first slip seat 1, and its rear end is provided with a handle 8; the rotating rod 9 is rotatably installed inside the first sleeve 4, with its front end passing through the second slip seat 2, and its rear end is connected to a drive assembly; the front end of the rotating rod 9 is provided with an external thread, and the first slip seat 1 is provided with a threaded hole 101 corresponding to the rotating rod 9, with the internal thread of the threaded hole 101 matching the external thread of the rotating rod 9.

[0023] More specifically, the slide bar 7 is a square bar. To facilitate the alignment of the rotating rod 9 with the threaded hole 101, the front end of the rotating rod 9 is a conical head 901.

[0024] like Figure 3 As shown, the ground drive unit is installed on the upper part of the support frame, and the packing box is connected to the support frame; the lower end of the packing box is connected to the upper flange of the wellhead, and the two are sealed by a steel ring; the polished rod passes through the packing box and the hollow output shaft of the screw pump ground drive unit; the support frame has several columns, and this tool is installed between the columns of the support frame when the ground drive unit is stopped.

[0025] The tool is taken out, the slide rod 7 is pushed forward, the first slip seat 1 and the second slip seat 2 are separated, the tool is installed, the polished rod is located between the two slips 3, then the handle 8 is pulled back, the first slip seat 1 is close to the second slip seat 2, and the front end of the rotating rod 9 is butted against the threaded hole 101; then the rotating rod 9 is driven to rotate by the driving assembly, the front end of the rotating rod 9 is screwed with the threaded hole 101, with the rotation of the rotating rod 9, the first slip seat 1 and the second slip seat 2 gradually approach, and the two slips 3 clamp the polished rod; after the two slips 3 clamp the polished rod, the first sleeve 4 and the second sleeve 5 at the rear part of the tool are limited by the support frame stand and cannot rotate, so that the purpose of limiting the polished rod from reversing is achieved. After the maintenance and repair of the ground driving device are completed, the tool is disassembled by reversing the hand wheel 13.

[0026] After the ground driving device is stopped, the polished rod is locked by the tool, and a safe working environment is provided for the maintenance personnel; in the process of locking the polished rod, the maintenance personnel is away from the polished rod and will not be injured. Embodiment Two

[0027] As a preferred embodiment of the utility model, the driving assembly is designed based on the embodiment one, in particular:

[0028] The driving assembly of the embodiment comprises a support 12, a worm wheel 10 and a worm 11 in meshing connection, the worm wheel 10 is fixedly sleeved on the rotating rod 9, the worm 11 is rotatably installed on the support 12, and one end of the worm 11 is connected with a hand wheel 13; the support 12 is fixed on the connecting rod 6.

[0029] When locking, the worm 11 is driven to rotate by rotating the hand wheel 13, the rotating rod 9 is driven to rotate by the transmission of the worm wheel 10 and the worm 11, so that the two slips 3 clamp the polished rod; since the worm and worm wheel mechanism has self-locking property, the rotating rod 9 will not reverse after being rotated to the position, further ensuring the stability of the tool clamping. Embodiment Three

[0030] As a preferred embodiment of the utility model, the structure of the slip 3 is optimized based on the embodiment two, in particular:

[0031] In the embodiment, a plurality of vertical grooves 301 are processed on the inner wall of the slip 3. When the tool is in the locking state, the vertical grooves 301 can improve the locking force and friction force of the two slips 3 on the polished rod.

[0032] The utility model is not limited to the above-mentioned embodiment, within the knowledge range of the person skilled in the art, various changes can be made without departing from the purpose of the utility model, and the changed content still belongs to the protection range of the utility model.

Claims

1. A screw pump optical rod anti-reverse tool, characterized in that: The utility model relates to a drilling tool, including first slip seat, second slip seat, slide bar and rotary lever, first slip seat and second slip seat are opposite arrangement, and the opposite surface of two all is equipped with slip; when two slips are closed, the inside cooperation of two forms slip through hole for light pole and passes through, the back of second slip seat left and right sides is equipped with horizontal first sleeve and second sleeve respectively, first sleeve and second sleeve left and right side by side setting, and two are linked through connecting rod; The slide bar is slidably installed in the second sleeve, the front end of the slide bar penetrates the second slip seat and is fixedly connected with the first slip seat, and the rear end of the slide bar is provided with a handle; the rotary lever is rotatably installed in the first sleeve, the front end of the rotary lever penetrates the second slip seat, and the rear end of the rotary lever is connected with a driving assembly; the front end of the rotary lever is provided with external threads, the first slip seat is provided with a threaded hole corresponding to the rotary lever, and the internal threads of the threaded hole are matched with the external threads of the rotary lever.

2. A light rod anti-reversing tool for a screw pump according to claim 1, characterized in that: The slide bar is a square rod.

3. A light rod anti-reverse rotation tool for a screw pump according to claim 1, characterized in that: A plurality of vertical grooves are formed on the inner wall of the slip.

4. A light rod anti-reverse rotation tool for a screw pump as set forth in claim 1, characterized in that: The front end of the rotary lever is a conical head.

5. A light rod anti-reverse rotation tool for a screw pump as set forth in claim 1, characterized in that: The driving assembly comprises a bracket, a worm wheel and a worm that are engaged, the worm wheel is fixedly sleeved on the rotary lever, the worm is rotatably installed on the bracket, and one end of the worm is connected with a hand wheel; the bracket is fixed on the connecting rod.

Images