CN2898268Y

CN2898268Y - Special oil-pipe anchor for screw pump

Info

Publication number: CN2898268Y
Application number: CN 200620085368
Authority: CN
Inventors: 吕玉兴; 李�杰; 童木目; 田成文
Original assignee: DONGYING SHENGLI HIGHLAND Co Ltd
Current assignee: DONGYING SHENGLI HIGHLAND Co Ltd
Priority date: 2006-06-09
Filing date: 2006-06-09
Publication date: 2007-05-09
Anticipated expiration: 2016-06-09

Abstract

The utility model relates to an oil field extraction machinery, in particular to a special screw pump tubing anchor specially used for preventing an underground screw pump string from rotating. The utility model adopts the technical proposal that the device comprises a connector, a slip insert sleeve, a spring ring, a slip insert, a centralizer sleeve, a centralizing block, a spring and a retainer ring. An internal thread is arranged at the top of the connector for connecting a liner on the screw pump and an external thread is arranged at the bottom for connecting the oil pipe; three evenly distributed planes with special contour are arranged circumferentially at the middle part; the slip insert sleeve is sleeved on the outer end of the connector. The utility model has the advantages that: 1. Simple structure, easy operation and reliable performance; the oil pipe can be anchored just through positively rotating the oil pipe and the problem of difficult anchoring can be avoided; the anchor can bear a bigger torque, which ensures the oil pipe not tripping; 2. Reasonable design, durability and repeat use for second time screw pump checking; 3. the oil pipe dose not bend after anchoring so as to reduce the rod friction, increase the pump efficiency, extend the service life of the screw pump and the sucker rod and extend the workover period of the oil well.

Description

Screw pump application tube anchor

One, technical field:

The utility model relates to a kind of oil field oil recovery machiner, particularly a kind of screw pump application tube anchor that is used for subsurface progressive cavity tubing string anti-rotation.

Two, background technology:

In the screw pump normal productive process, from looking down the well head direction, rotor clockwise rotates, friction between rotor and the stator makes stator produce clockwise active force, if do not take grappling measure or grappling unreliable, just can cause tubing string to thread off, make oil well not only can not keep ordinary production, also can cause the repetition operation, even cause workover to stop production.Put the tubing anchor complex structure of the formula of putting on existing, difficult seat envelope makes tubing deformation easily, and is not suitable for inclined shaft and catch-basin; And the turnover panel anchor seals by the spring leaf supporting seat, easily premature failure.

Three, summary of the invention:

The purpose of this utility model is exactly the above-mentioned defective that exists at prior art, provide a kind of easy, grappling is reliable, long-lived screw pump application tube anchor.

Its technical scheme is: be made up of connector, slip insert sleeve, turn, slip insert, wiper block sleeve, wiper block, spring, back-up ring, the upper end of described connector is provided with internal thread and links to each other with the tail pipe of screw pump, its lower end is provided with external screw thread and links to each other with oil pipe, the middle part circumferencial direction is designed to three uniform special-shaped faces, and the outer end is with the slip insert sleeve.

Described slip insert sleeve is provided with three uniform slip grooves, matches with three slips that have the turn hole respectively, links to each other with turn between the slip insert.

The lower end of described slip insert sleeve connects the wiper block sleeve, and its outer end is designed to three uniform grooves and matches with three wiper blocks respectively, is provided with a plurality of spring eyes in the wiper block, is used for mounting spring.

The lower end of wiper block sleeve connects back-up ring, wiper block is fixed in the groove of wiper block sleeve.

The external surface of described slip insert is designed to zigzag, and the external surface of wiper block is designed to step-like.

The beneficial effects of the utility model are: the one, and simple in structure, easy to use, dependable performance is just being changeed oil pipe and can realized grappling after going into the well, do not have the problem of grappling difficulty, and anchor body bearing torque is big, and oil pipe can not threaded off; The 2nd, reasonable in design, durable in use.This screw pump application tube anchor go into the well and use in, wearing and tearing and damage very little, therefore, reusable when screw pump is examined pump once more; The 3rd, oil pipe does not have bending after the grappling, can reduce the rod tube friction, improves pump efficiency, prolongs screw pump and sucker rod application life, improves being excused from a college course the phase of oil well.

Four, description of drawings:

Accompanying drawing 1 is a sectional view of the present utility model;

Accompanying drawing 2 is vertical views of the present utility model.

Five, the specific embodiment:

In conjunction with the accompanying drawings, the utility model will be further described:

Its technical scheme: comprise connector 1, slip insert 2, turn 3, slip insert 4, wiper block sleeve 5, wiper block 6, spring 7, back-up ring 8.From figure, can see the shape and the mutual alignment relation of each parts clearly, during assembling, earlier turn 3 and slip insert 2 are stuck on the connector 1, then the slip groove of slip insert sleeve 5 is aimed at slip insert 2 and be inserted in connector 1, simultaneously spring 7 and wiper block 6 are packed in the wiper block sleeve 5, with screw back-up ring is screwed on the wiper block sleeve 5 then, be inserted in connector 1 then together, aim at screw, dress up one by screw again.

This screw pump application tube anchor upper end links to each other with the screw pump tail pipe, and the lower end connects oil pipe, and wiper block 6 plays the oil pipe effect of setting upright under the effect of spring 7.When screw pump normally moves, from looking down the well head direction, rotor turns clockwise, friction between rotor and stator drives stator and turns clockwise, impel the connector 1 of tubing anchor to turn clockwise, slip insert 2 since the effect of connector 1 special-shaped face and turn 3 along with the rotation of connector 1 is opened simultaneously, the sawtooth up to slip insert 4 outer ends blocks sleeve pipe, oil pipe and screw pump stator no longer rotate, thereby play the anti-effect of revolving.When screw bolt well was shut down, screw pump stator lost the trend that turns clockwise, and impelled the connector 1 of tubing anchor to no longer include clockwise active force, and slip insert 2 is return under the effect of turn 3, thereby reaches the deblocking effect.

Claims

1, a kind of screw pump application tube anchor, it is characterized in that: form by connector, slip insert sleeve, turn, slip insert, wiper block sleeve, wiper block, spring, back-up ring, the upper end of described connector is provided with internal thread and links to each other with the tail pipe of screw pump, its lower end is provided with external screw thread and links to each other with oil pipe, the middle part circumferencial direction is provided with three uniform special-shaped faces, and the outer end is with the slip insert sleeve.

2, screw pump application tube anchor according to claim 1, it is characterized in that: described slip insert sleeve is provided with three uniform slip grooves, matches with three slips that have the turn hole respectively, links to each other with turn between the slip insert.

3, screw pump application tube anchor according to claim 1, it is characterized in that: the lower end of described slip insert sleeve connects the wiper block sleeve, its outer end is provided with three uniform grooves and matches with three wiper blocks respectively, is provided with a plurality of spring eyes in the wiper block, is used for mounting spring.

4, screw pump application tube anchor according to claim 1, its feature: the lower end of wiper block sleeve connects back-up ring, wiper block is fixed in the groove of wiper block sleeve.

5, screw pump application tube anchor according to claim 1, its feature: the external surface of described slip insert is a zigzag, the external surface of wiper block is step-like.