Anti-eccentric-wearing centering guide for sucker rod

Abstract

The invention provides an anti-eccentric-wearing centering guide for a sucker rod. The anti-eccentric-wearing centering guide comprises entering rollers, shaft sleeves, limiting plates, limiting clamprods, adjusting springs A, clamp slots and rolling balls. The centering rollers are embedded in adjusting shafts arranged at inner sides of grooves by bearings; and the shaft sleeves sleeve the adjusting shafts at the two ends of the outer sides of the groove. Sleeving columns are welded to the outer wall of a centering guide body; and the adjusting springs A are arranged between the two groups of sleeving columns. The annular clamp slots are formed in the outer edge of a centering ring; and integrated adjusting plates are arranged at the rear ends of arc centering plates and are clamped in the clamp slots movably. Three groups of rolling balls are embedded into the outer edges of the arc centering plates. Adjusting springs B are connected in the gaps between the arc centering plates andthe centering ring. The rolling balls arranged at the front ends of the arc centering plates are used for realizing rotation of a sucker rod conveniently; one group of sucker rods are connected into internal thread insertion holes of another groups of sucker rods in a screwing manner; the centering rollers are in contact with the well wall under the effects of the adjusting springs A; and thus thesucker rod are adjusted up and down successfully.

Description

technical field [0001] The invention belongs to the technical field of petroleum downhole work, and more specifically relates to a sucker rod anti-eccentric wear centralizer. Background technique [0002] The sucker rod is a slender rod of the pumping well, it is connected to the polished rod on the top, and the pump is connected to the bottom to transmit power. [0003] The inventor found similar patents in the process of searching for patents. For example, the patent application number is: CN201620952280.0, which discloses a casing centralizer applied to downhole guides in radial drilling, which belongs to the field of petroleum downhole work , including an upper centralizer and a lower centralizer, the upper centralizer includes an upper centralizer body, a centralizing block is arranged on the upper centralizer body, a spring is arranged between the centralizing block and the upper centralizer body, and the lower centralizer includes a lower centralizer body , the lower...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention provides a sucker rod anti-eccentric wear centralizer to solve the problem that when the sucker rod rotates or moves up and down in the above-mentioned background technology, the centering block will rub against the well wall, resulting in resistance, and the pumping It is more difficult to move the oil rod, increasing the difficulty of use

Images