CN2154342Y

CN2154342Y - Pearl type correcting anti-drop apparatus of sucker rod

Info

Publication number: CN2154342Y
Application number: CN 93227766
Authority: CN
Inventors: 郭辉; 林凯锋
Original assignee: BEIFANG INDUSTRY CORP LIAOHE OIL FIELD
Current assignee: BEIFANG INDUSTRY CORP LIAOHE OIL FIELD
Priority date: 1993-04-02
Filing date: 1993-04-02
Publication date: 1994-01-26
Anticipated expiration: 2003-04-02

Abstract

The utility model relates to a pearl type correcting anti-drop device of an oil pumping rod, comprising steel balls, an upper bracket, a lower bracket, a core shaft. The steel balls are arranged inside the ball grooves of the upper bracket and the lower bracket, and are fixed by pins to form an annular ball rack. The annular ball rack is penetrated on the center of the core shaft, and two ends of the annular ball rack are fixed by press caps. The utility model uses the pearl type correcting anti-drop device of an oil pumping rod to realize the functions that buckle drop is transversally prevented when rotating, and abrasion is longitudinally prevented when moving. In addition, the utility model also has the advantages of small volume, light weight, and large reliability.

Description

Pearl type correcting anti-drop apparatus of sucker rod

The utility model relates to a kind of sucker rod pearl formula centering dropout prevention device.

In the prior art, sucker rod is on the down-hole in the km degree of depth oil pumping process, often meet lower curved section, sucker rod takes place to rub mutually with tube wall, and the integral body that is formed by connecting by the plurality of sections sucker rod, laterally easily thread off in friction process, vertically be subjected to frictional resistance again, the roller type centralizer of simple function is made up of wheel carrier and nylon wheel at present, this centralizer is under the situation of tubing wax, the nylon wheel both sides often contact simultaneously with tube wall, and does not change owing to be subjected in the same way resistance the nylon wheel both sides, thereby do not reach the effect of setting upright, this centralizer radial capacity is poor in addition, wheel body is stressed yielding, loses centralizing function, and does not have the function of anticreep.

The purpose of this utility model provides the sucker rod centering dropout prevention device that a kind of usefulness one cover pearl formula bearing is realized anticreep, abrasionproof effect simultaneously.

A kind of scheme of the present utility model is: sucker rod pearl formula centering dropout prevention device, include steel ball (6), upper bracket (3), lower carriage (4) and mandrel (1), steel ball (6) is arranged in the ball-and-socket of upper bracket (3) and lower carriage (4), fixing by pin (5), form the ball-collecting rack of ring-type, ball-collecting rack monomer or a plurality of series connection are through mandrel (1) central authorities, and two ends are fixing with pressure cap (2).

Another kind of scheme of the present utility model is: sucker rod pearl formula centering dropout prevention device includes steel ball (6), upper bracket (3), lower carriage (4) and mandrel (1), steel ball (6) is arranged in the ball-and-socket of upper bracket (3), lower carriage (4), fixing by pin (5), form the ball-collecting rack of ring-type, the ball-collecting rack of monomer or a plurality of series connection is worn the mandrel central authorities that at one end have pressure cap, and the mandrel two ends have male thread and box thread respectively.

Compare with existing centralizer with simple function, the effect of threading off, being ground when vertically preventing to move when the utility model is realized laterally preventing to rotate with a cover pearl formula centering dropout prevention device, the utility model also has the advantage that volume is little, in light weight, reliability is big in addition.

Be described in detail technical solution of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is a pressure cap formula sucker rod centering dropout prevention device schematic diagram

Fig. 2 is the A-A sectional view along Fig. 1.

Fig. 3 is a screw-type sucker rod centering dropout prevention device schematic diagram.

Fig. 4 is the A-A sectional view along Fig. 3.

As Fig. 1,2, pressure cap formula sucker rod pearl formula centering dropout prevention device, include steel ball 6, upper bracket 3, lower carriage 4 and mandrel 1, steel ball 6 is arranged in the ball-and-socket of upper bracket 3 and lower carriage 4, and is fixing by pin 5, forms the ball-collecting rack of ring-type, ball-collecting rack monomer or a plurality of series connection are through mandrel 1 central authorities, and two ends are fixing with pressure cap 2.

As Fig. 3, Fig. 4, screw-type sucker rod pearl formula centering dropout prevention device, include steel ball 6, upper bracket 3, lower carriage 4 and mandrel 1, steel ball 6 is arranged in the ball-and-socket of upper bracket 3, lower carriage 4, and is fixing by pin 5, forms the ball-collecting rack of ring-type, the ball-collecting rack of monomer or a plurality of series connection is worn the mandrel central authorities that at one end have pressure cap, and the mandrel two ends have male thread and box thread respectively.

Ball-and-socket of the present utility model can be through hole and half hole ball-and-socket.

During use, this centering dropout prevention device is installed in the rod connector at lower curved section place of pumpingh well, is doing when up and down reciprocatingly moving when sucker rod, steel ball contacts with tube inner wall, rotates in the horizontal and plays the anticreep effect, plays the abrasionproof effect in lengthwise movement.

Claims

1, a kind of sucker rod pearl formula centering dropout prevention device, it is characterized in that it includes steel ball (6), upper bracket (3), lower carriage (4) and mandrel (1), steel ball (6) is arranged in the ball-and-socket of upper bracket (3) and lower carriage (4), fixing by pin (5), form the ball-collecting rack of ring-type, ball-collecting rack monomer or a plurality of series connection are through mandrel (1) central authorities, and two ends are fixing with pressure cap (2).

2, a kind of sucker rod pearl formula centering dropout prevention device, it is characterized in that it includes steel ball (6), upper bracket (3), lower carriage (4) and mandrel (1), steel ball (6) is arranged in the ball-and-socket of upper bracket (3), lower carriage (4), fixing by pin (5), form the ball-collecting rack of ring-type, the ball-collecting rack of monomer or a plurality of series connection is worn the mandrel central authorities that at one end have pressure cap, and the mandrel two ends have male thread and box thread respectively.

3, sucker rod pearl formula centering dropout prevention device according to claim 1 and 2 is characterized in that described ball-and-socket can be through hole and half hole ball-and-socket.