Eccentric-wear-prevention steel ball centralizer

Abstract

The invention discloses an eccentric-wear-prevention steel ball centralizer, which structurally comprises a lower threaded joint, a lower threaded joint centralizing sleeve, an auxiliary extraction piston, an auxiliary extraction piston centralizing tooth sleeve, an upper joint centralizing sleeve and an upper joint, wherein a buckling gasket is arranged on the upper joint; a slide rod is arrangedin the center position of the bottom of the buckling gasket; when an oil suction rod is in butt joint on the upper joint, the slide rod can buckle the buckling gasket onto an inner wall fixing grooveof the oil sucking rod by using the telescopic principle of a spring; four shearing pins are uniformly arranged on the outer wall of the upper joint at equal intervals; the shearing pins are matchedwith the buckling gasket; the butt joint fixing degree of the centralizer and the oil sucking rod can be improved; an oil discharge screw nut is arranged on the upper joint; oil stain inside the auxiliary extraction piston can be discharged; the oil extraction efficiency is improved; the wearing damage of one side of the oil wall inner wall can be prevented.

Description

technical field [0001] The invention is an anti-eccentric steel ball centralizer, which belongs to the field of steel ball centralizers. Background technique [0002] The sucker rod centralizer is an anti-eccentric downhole tool for pumping wells. It is suitable for pumping wells with eccentric wear, especially for pumping wells and directional deviated wells with eccentric wear above the neutral point of the sucker rod. The neutral point of the sucker rod Below, cooperate with the nylon centralizer on the sucker rod body, the anti-eccentric wear effect is better. [0003] The prior art anti-eccentric wear steel ball centralizer does not fix the sucker rod to a high degree. Due to the weight of the sucker rod itself, it is more difficult to pull the sucker rod. At the same time, one side of the inner wall of the oil wall is easier to be worn, which greatly reduces oil efficiency. Contents of the invention [0004] In view of the deficiencies in the prior art, the object ...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide an anti-eccentric wear steel ball centralizer to solve the problem that the anti-eccentric wear steel ball centralizer does not fix the sucker rod to a high degree, and due to the weight of the sucker rod itself, It is more difficult to pull the sucker rod, and at the same time, one side of the inner wall of the oil wall is easier to be worn, which greatly reduces the problem of oil output efficiency

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