CN2690563Y

CN2690563Y - Anti bias wear centering guide for rod oil puming well

Info

Publication number: CN2690563Y
Application number: CN 200420008051
Authority: CN
Inventors: 杨峰; 程海霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-29
Filing date: 2004-02-29
Publication date: 2005-04-06
Anticipated expiration: 2014-02-28

Abstract

The utility model provides an anti bias wear centering guide for the rod oil pumping well in the oil field. Three rollers which are inlaid with bushes are installed in slotted holes which are circumferentially arranged uniformly and are arranged a center pipe through a roller shaft. The slooted holes are staggered in shaft direction. Both ends of the center pipe are sheathed in a wear resistant centering cover and are tightened with nut screws. A centering pole is penetrated in the inner hole of the center pipe. A back cap, an upper connector and the back cap, a lower connector are screwed on upper and lower ends of the centering pole respectively; the back cap, the upper and lower connectors are mutually back-tightened. In the normal production process, the components of the center pipe are limited on the bias wear position of the oil well. Under the support and the centering of the roller, the centering pole moves up and down along the center of the oil pipe. The frictional wear of the pumping rod and the oil pipe is avoided, and the useful life of the pumping rod and the oil pipe is prolonged.

Description

There is the bar producing well to prevent the eccentric wear erection device

Affiliated technical field

The utility model relates to a kind of oil field has the bar producing well to prevent the eccentric wear erection device, is a kind of mechanical device that solves sucker rod and oil pipe fretting wear problem.

Background technology

The anti-eccentric wear erection device of bar producing well that has that use in the oil field at present mainly contains rolling wheel centralizer, nylon centralizer and extension bar centralizer.Rolling wheel centralizer the rotor block serious wear often occurs or roller is stuck does not change, and causes phenomenons such as oil pipe wearing and tearing aggravation; Defectives such as the nylon centralizer exists abrasion resistance poor, and application life is short, and frictional resistance is big.And the extension bar centralizer causes the fretting wear between the R a T behind the nylon jacket wear out failure on the righting rod, has reduced R a T application life.

Summary of the invention

In order to overcome the shortcoming and defect of above-mentioned prior art, the utility model provides the anti-eccentric wear erection device of fretting wear between a kind of effective solution sucker rod and the oil pipe.This device can be according to the eccentric wear situation of oil well, be installed in the position easy to wear of sucker rod and oil pipe, make righting rod under the support centralizing function of circumferentially uniform roller, move up and down along the central axis of oil pipe, avoid the fretting wear between the R a T, prolong oil well repair free period.

The technical scheme that its technical problem that solves the utility model adopts is: be pressed into lining in three roller endoporus, and by roller shaft it be installed in circumferential uniform, the slotted eye that axially staggers of on the central tube three.Roller shaft two ends and central tube weld together.Be inserted in wear-resisting supporting positive cover at the two ends up and down of central tube and use nut tightening, organization center duct member.Righting rod is penetrated in the endoporus of central tube, screw in back of the body cap, top connection and back of the body cap, lower contact respectively successively at the two ends up and down of righting rod, and will carry on the back cap and top connection and lower contact respectively and carry on the back mutually tightly, thereby the central tube parts are limited on the righting rod.After will having the anti-eccentric wear erection device of bar producing well to be lowered to subscribe the position according to the eccentric wear situation, the wear-resisting supporting positive cover of central tube outside contacts with tube inner wall.Righting rod is set upright down in the support of three rollers, remains on the oil pipe center substantially.When the oil well ordinary production, the position relative fixed between central tube parts and the oil pipe, righting rod and roller rolling friction, and move up and down along the oil pipe center, thus effectively avoided fretting wear between sucker rod and the oil pipe, prolonged being excused from a college course the phase of oil well.

The beneficial effects of the utility model are, are rolling friction between righting rod and the roller, can be implemented in setting upright automatically of sucker rod and oil pipe eccentric wear position, have avoided the fretting wear between sucker rod and the oil pipe.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Accompanying drawing is a structural representation of the present utility model.

1 top connection among the figure, 2 back of the body caps, 3 nuts, 4 wear-resisting supporting positive covers, 5 central tubes, 6 righting rods, 7 lower contacts, 8 rollers, 9 linings, 10 roller shafts.

The specific embodiment

In the accompanying drawings, lining (9) is pressed in the endoporus of roller (8), and put into circumferential uniform, the slotted eye that axially staggers of on the central tube (5) three, elongated hole and the centre bore of lining (9) of roller shaft (10) from the central tube (5) passes and welds together with central tube (5).Be inserted in wear-resisting supporting positive cover (4) at the two ends up and down of central tube (5) and use nut (3) to tighten the organization center duct member respectively.Righting rod (6) is penetrated the endoporus of central tube (5), descend two ends to screw in back of the body cap (2), top connection (1) and back of the body cap (2), lower contact (7) successively thereon, and will carry on the back cap (2) and top connection (1) respectively, back of the body cap (2) and lower contact (7) back of the body mutually are tight, have the bar producing well to prevent the eccentric wear erection device thereby form.During this device busy, the central tube parts rely on wear-resisting supporting positive cover (4) to be fixed on oil well eccentric wear position, hold up core bar (6) to set upright down in the support of three rollers (8), central axis along oil pipe moves up and down, stop the fretting wear between sucker rod and the oil pipe, prolonged bar, pipe application life and oil well repair free period.

Claims

1, a kind of oil field has the bar producing well to prevent the eccentric wear erection device, mainly by top connection, back of the body cap, nut, wear-resisting supporting positive cover, central tube, righting rod, lower contact, roller, lining, roller shaft is formed, it is characterized in that: lining (9) is pressed in the endoporus of roller (8), by roller shaft (10) that its three of being installed on the central tube (5) are circumferential uniform, axially stagger in the slotted eye, the two ends of roller shaft (10) and central tube (5) are welded to connect, the organization center duct member, the righting rod of any surface finish (6) penetrates the endoporus of central tube (5), descend two ends to screw in back of the body cap (2) successively thereon, top connection (1) and back of the body cap (2), lower contact (7), and will carry on the back cap (2) and top connection (1) respectively, back of the body cap (2) and lower contact (7) back of the body mutually are tight.

2, according to claim 1 have the bar producing well to prevent the eccentric wear erection device, it is characterized in that: be processed with on the central tube (5) three circumferential uniform, slotted eye that axially is in staggered distribution and elongated hole.

3, according to claim 1 have the bar producing well to prevent the eccentric wear erection device, it is characterized in that: the two ends of central tube (5) are equipped with the wear-resisting supporting positive cover (4) of macromolecular material and screw by nut (3).

4, according to claim 1 have the bar producing well to prevent the eccentric wear erection device, it is characterized in that: be embedded with the lining of interference fit (9) with it in the endoporus of roller (8), and be installed on the central tube (5) by roller shaft (10), the two ends of roller shaft (10) are fixed by welding on the central tube (5).

5, according to claim 1 have the bar producing well to prevent the eccentric wear erection device, it is characterized in that: the righting rod of any surface finish (6) penetrates in the endoporus of central tube (5), screw in back of the body cap (2) and top connection (1) in righting rod (6) upper end, the lower end screws in back of the body cap (2) and lower contact (7), and will carry on the back cap (2) respectively and top connection (1), back of the body cap (2) and lower contact (7) are mutual carries on the back tightly.