CN2780977Y

CN2780977Y - Anchor for oil production tubular column of screw pump

Info

Publication number: CN2780977Y
Application number: CN 200520019866
Authority: CN
Inventors: 管丙金; 邵衍旭; 薛爱信
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-03
Filing date: 2005-05-03
Publication date: 2006-05-17
Anticipated expiration: 2015-05-03

Abstract

The utility model relates to an anchoring device for an oil extracting tubular column of a screw pump which is used in an oil extracting well of a screw pump in oil fields, which is composed of a cone, a slip, a central tube, a slip supporter, a gritting-reversing device, and a bearing-twisting device. When the anchoring device is used, the tubular column is lifted at the start, and is reelingly put down further; the reversing device is gritted to make a turnover plate on the bearing-twisting device clamp a casing tube, because upright teeth are arranged on the turnover plate, the tubular column can bear rotary torque; in the process of lifting and reelingly putting down the tubular column, pins of the gritting-reversing device are reversed from a long orbit on the central tube into a short orbit; when the tubular column is put down, the distance between the cone and the slip can be reduced, the slip is dilated and tightly clamped on the casing tube, and the oil extracting tubular column of a screw pump can bear axial force. The utility model can effectively anchor the oil extracting tubular column of a screw pump, because the axial force making the slip dilate and tightly clamp on the casing tube is not needed very large, when the slip is anchored, the weight of the tubular column put down is also not needed very large, therefore the bending degree of the oil tube is light, and the abrasion of the oil tube and an oil pumping rod are light.

Description

Screw pump oil production tubing string anchor

One, technical field

The utility model is the screw pump oil production tubing string anchor that the oil field screw pump oil production well is used.

Two, background technology

In using screw pump oil production, surface drive drives the sucker rod rotation, and sucker rod drives the rotor rotation of screw pump again, because oil pipe is a right-handed thread, the sucker rod of drive screw pump rotor rotation also is a right-handed thread, and in the oil recovery, sucker rod turns clockwise, the drive screw pump rotor turns clockwise, rub-moment between screw pump rotor and the stator becomes the moment of torsion of oil pipe shackle, and this moment of torsion causes the tubing round thread shackle easily, make the oil pipe well that falls, thereby produce heavy economic losses.For avoiding the generation of this accident, the normal way that adopts the grappling oil pipe is avoided the fall generation of well accident of tubing round thread shackle, existing anchoring device is improved with the packer assembly, weight by tubing string realizes grappling, can only bear axial force, and the screw pump oil production tubing string is except that bearing axial force, also bear moment of torsion, need very big axial anchorage force so make anchoring device with the packer assembly, cause tubing bending, the fall accident of well of the insecure oil pipe of grappling still appearred in the wearing and tearing of aggravation oil pipe, sucker rod, and be not very reliable.

Three, summary of the invention

The purpose of this utility model is that design a kind ofly can be born axial force, can bear the screw pump oil production tubing string anchor of moment of torsion again, makes its tubing bending degree light, and grappling is reliable.

The purpose of this utility model is achieved in that it is made up of cone, slips, central tube, slips holder, friction reversing arrangement, bearing torque device.The cone bottom connects central tube, central tube is outward slips, slips holder, friction reversing arrangement, bearing torque device, the slips inner groovy cooperates with the cone tongue, slips is installed in the slips holder, connect friction reversing arrangement, bearing torque device under the slips holder, rail groove is arranged on the central tube, and the track pin of friction on the reversing arrangement is installed in the rail groove on the central tube.

Elder generation's upper lifting pipe post during use, tubing string is transferred in rotation again, the reversing arrangement that rubbed before this makes the turnover panel on the bearing torque device block sleeve pipe, owing to designed vertical tooth on the turnover panel, so tubing string can bear rotation torque, transfer in the tubing string process in the rotation of upper lifting pipe post, track pin on the friction reversing arrangement commutates to short track from the long track on the central tube, when transferring tubing string between cone and the slips distance can dwindle, slips expansion and card jail make the screw pump oil production tubing string can bear axial force on sleeve pipe.

The beneficial effects of the utility model are: the bearing torque device can bear axial force, cone, slips can bear axial force, energy is grappling screw pump oil production tubing string effectively, owing to make the axial force of slips expansion card jail on sleeve pipe not need very big, the weight of transferring tubing string during the grappling slips does not just need very big yet, so the tubing bending degree is light, oil pipe, sucker rod light abrasion.

Four, description of drawings

Accompanying drawing is a structure assembling drawing of the present utility model.

Five, the specific embodiment

In the drawings: the 1st, cone, the 2nd, slips, the 3rd, central tube, the 4th, slips holder, the 5th, friction reversing arrangement, the 6th, bearing torque device.Be that the utility model is made up of cone 1, slips 2, central tube 3, slips holder 4, friction reversing arrangement 5, bearing torque device 6.Cone 1 bottom connects central tube 3, outside the central tube 3 slips 2, slips holder 4, friction reversing arrangement 5, bearing torque device 6, slips 2 inner groovies cooperate with cone 1 tongue, slips 2 is installed in the slips holder 4, connect friction reversing arrangement 5, bearing torque device 6 under the slips holder 4, on the central tube 3 rail groove is arranged, the track pin of friction on the reversing arrangement 5 is installed in the rail groove on the central tube 3.

Elder generation's upper lifting pipe post during use, tubing string is transferred in rotation again, the reversing arrangement 5 that rubbed before this makes the turnover panel on the bearing torque device 6 block sleeve pipe, owing to designed vertical tooth on the turnover panel, so tubing string can bear rotation torque, transfer in the tubing string process in the rotation of upper lifting pipe post, track pin on the friction reversing arrangement 5 commutates to short track from the long track on the central tube 3, when transferring tubing string between cone 1 and the slips 2 distance can dwindle, slips 2 expansions and card jail make the screw pump oil production tubing string can bear axial force on sleeve pipe.

Claims

1, a kind of screw pump oil production tubing string anchor, by cone (1), slips (2), central tube (3), slips holder (4), friction reversing arrangement (5), bearing torque device (6) is formed, it is characterized in that: cone (1) bottom connects central tube (3), central tube (3) is outer to be slips (2), slips holder (4), friction reversing arrangement (5), bearing torque device (6), slips (2) inner groovy cooperates with cone (1) tongue, slips (2) is installed in the slips holder (4), connect friction reversing arrangement (5) under the slips holder (4), bearing torque device (6), central tube has rail groove on (3), and the track pin in friction reversing arrangement (5) is installed in the rail groove on the central tube (3).