Sucker rod centralizer sliding bush

Abstract

The invention relates to a sucker rod centralizer sliding sleeve, which is provided with a tube-shaped sliding sleeve which is made of rolled steel, the sliding sleeve is provided with an axial through hole, the outer wall surface of the sliding sleeve is surrounded by N pieces of circumferential faces whose shaft lines are parallel and diameters are equal, the N is two, three or four, the degreenumbers of circle center dihedral angles of the circumferential faces are less than 360 / N degrees, bigger than 360 / 3N degrees, the notch direction of the circumferential face faces to the sliding sleeve, the outer wall surface of the sliding sleeve which is adjacent to both ends is a conical surface, and the outer wall of the sliding sleeve is provided with nickel base powder alloy layer which iscomposited by a spray welding method. The sucker rod centralizer sliding sleeve has higher intensity, the circumferential face of the outer wall of the sliding sleeve can be the same with the curvature of the inner wall of the oil pipe, the contact face between the circumferential face of the outer wall of the sliding sleeve and the inner wall of the oil pipe is bigger, the hardness of the outer wall of the sliding sleeve is higher, when the nickel base powder alloy layer is used, exposed metal nickel particle can be used as the lubricating agent of the outer wall of the sliding sleeve and the inner wall of the oil pipe, the abrasion of the sliding sleeve and the oil pipe is greatly lightened, and the service span is longer.

Description

technical field [0001] The invention relates to an accessory of a sucker rod centralizer in rod pumping equipment in an oil field, in particular to a sliding sleeve of a sucker rod centralizer. Background technique [0002] The sucker rod is an important part of the rod pumping equipment, which transmits the power of the pumping unit to the oil pump under the oil well. The plunger type oil well pump is a reciprocating oil well pump. For the oil well that uses the plunger type oil well pump to produce oil, it uses multiple connected sucker rods to reciprocate up and down in the oil pipe to transmit the power of the ground to the downhole oil well pump. , the sucker rod has a rod body, the two ends of the rod body have rod heads, and the rod heads at both ends have connecting threads respectively. The sucker rod is connected by sucker rod couplings with connecting threads at both ends. The outer diameter of the sucker rod coupling Larger than the outer diameter of the sucker ...

AI Technical Summary

Problems solved by technology

The sliding sleeve of this kind of sucker rod centralizer is a circular tube. The curvature of the outer wall of the sliding sleeve circular tube is greater than the curvature of the inner wall of the oil well. The outer wall of the sliding sleeve circular tube is in line contact with the inner wall of the oil well. The sliding sleeve is made of engineering plastics. , engineering plastics have low strength and low hardness, and the contact area between the teeth on the outer wall and the inner wall of the tubing is small. Because the downhole environment in the oil field is harsh, the sucker rod is heavily loaded, and the sliding sleeve made of engineering plastics is very difficult to use. It will be worn out in a short time, the service life is short, and it cannot effectively protect the oil rod coupling and oil pipe

Images