CN2551757Y - Ball sucker rod wear preventer - Google Patents

Abstract

The utility model discloses a ball formula sucker rod wear preventer, this wear preventer includes that both ends have the coupling main part 3 of screw thread, be provided with rolling element 9 on the coupling main part 3, rolling element 9 both ends are provided with fender ring 5, rolling element 9 comprises ball holder 2 and ball 1, ball holder 2 and coupling main part 3 are opened and are had corresponding ball rotating groove 10, ball 1 inlays in ball rotating groove 10, adopt the ball to do the rolling element, it is little with oil pipe inner wall contact clearance, and because the ball can be along ball holder circumference whole gyration, therefore wear-resisting, corrosion-resistant, both can prevent the sucker rod wearing and tearing, do not harm oil pipe again; simple structure, small size and can be applied to various well deviation and horizontal wells.

Description

Ball sucker rod wear preventer

The utility model relates to a ball-type sucker rod anti-wear device used in an oil field, which belongs to an auxiliary tool for oil production of a rod pump.

As we all know, in order to make the sucker rod in the center of the oil pipe, a sucker rod centralizer should be installed on the sucker rod string to prevent the sucker rod from bending and reduce the wear of the sucker rod and the oil pipe. Sucker rod centralizers commonly used in the field are roller-type centralizers. The "Oil Production Engineering Handbook" discloses two types of roller-type sucker rod centralizers, one is a three-wheel type and the other is a four-wheel type. The rollers of the centralizer move back and forth at a fixed position on the inner wall of the oil pipe for a long time, causing the oil pipe to be ground into grooves, causing corrosion, wear and other damage, while the rotation of the rollers is affected, and such a wear preventer has a large axial dimension, and its use The scope is limited.

The purpose of the utility model is to provide a ball-type sucker rod centralizer with simple structure, which can realize the wear resistance and corrosion resistance of the sucker rod and the sucker pipe, flexible rotation and long service life.

In order to achieve the above object, the ball-type sucker rod anti-wear device of the present invention has a coupling main body with threaded buckles at both ends, a rolling body is arranged on the coupling main body, retaining rings are arranged at both ends of the rolling body, and the rolling body is formed by ball cage and balls), the ball cage and the main body of the coupling have corresponding ball rotation grooves, and the balls are embedded in the ball rotation grooves.

The utility model adopts the ball as the rolling body, and the contact gap with the inner wall of the oil pipe is small, and because the ball can rotate along the circumference of the ball cage as a whole, it is wear-resistant and corrosion-resistant, which can prevent the wear of the sucker rod without damaging the oil pipe; the structure is simple , small size, can be used in various well deviations and horizontal wells.

Accompanying drawing 1 is a structural sectional view of the utility model.

Accompanying drawing 2 is the structural sectional view of another embodiment of the utility model.

Further description will be made below in conjunction with the accompanying drawings.

As shown in Figure 1, the two ends of the coupling main body 3 of the ball type sucker rod anti-wear device are provided with threaded fasteners, and the ball cage 2 is set on the coupling main body 3, and the ball cage 2 and the coupling main body 3 are provided with Corresponding to the ball rotating groove 10, the ball 1 is embedded in the ball rotating groove 10, and the ball 1 can rotate along the circumference as a whole. Grooves are formed on the connecting end faces of the ball cage 2 and the coupling main body 3 and the retaining ring 5, and small balls 4 are assembled therein. The small ball 4, the ball cage 2, and the retaining ring 5 are set on the main body 5 of the collar in sequence.

Accompanying drawing 2 is another embodiment of the present utility model, and this collar main body is made up of collar upper body 6 and collar lower body 7, and ball cage 2 and collar lower body 7 have corresponding ball rotation groove 10, and ball 1 Rotate as a whole along the circumference. The ball cage 2 and the coupling main body 6 are sequentially set on the coupling lower body 7 .

Claims (2)

1, a kind of ball-type sucker rod abrasionproof device, comprise that two ends have the box cupling main body (3) of screw thread, box cupling main body (3) is provided with rolling element (9), rolling element (9) two ends are provided with baffle ring (5), it is characterized in that: described rolling element (9) is made of ball retainer (2) and ball (1), have corresponding ball rotation slot (10) on ball retainer (2) and the box cupling main body (3), ball (1) is embedded in the ball rotation slot (10).

2, ball-type sucker rod abrasionproof device according to claim 1, it is characterized in that: described box cupling main body (3) is made up of box cupling upper body (6) and box cupling lower body (7), and ball retainer (2), box cupling upper body (6) are sleeved on the box cupling lower body (7) successively.

Images