Two-rolling bearing type pumping rod centralizer

A technology of rolling bearings and centralizers, which is applied to drill pipes, drilling equipment, earthwork drilling, etc., and can solve the problems of poor wear resistance and low fatigue life
CN1924285AInactive Publication Date: 2007-03-07北京百世卓越科技发展有限公司 +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
北京百世卓越科技发展有限公司
Publication Date
2007-03-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to double rolling bear oil extraction bar correction device, which comprises corrector bar with screw on ends, composite correction cover, rolling bar, limit ring and fix ring. The invention is characterized by the following: setting two correction cover with each one composed of two correction blocks and four or six hard nanometer ceramics rolling sphere part as hole tank of protruding part with anti-ware and anti-erosion property; the rolling sphere part is in order of four or six edges.
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Description

technical field

[0001] The invention relates to an oil well sucker rod connection centralizer, in particular to a double rolling bearing type sucker rod centralizer with good friction resistance and corrosion resistance. Background technique

[0002] Rod pumping units are mostly used in present oil fields. It is driven by the pumping unit through the sucker rod string to lift the crude oil to the wellhead. When the distribution of the oil layer is deep from the ground, the sucker rod string is very long or the oil well itself is inclined or bent, and there is a corrosive medium in the working environment of the sucker rod, which leads to serious wear and corrosion of the sucker rod and tubing. The existing sucker rod centralizer has poor wear resistance and corrosion resistance, and has a low fatigue life, resulting in frequent accidents of sucker rod fracture or oil pipe being worn through. Contents of the invention

[0003] The purpose of the present invention is to de...

Claims

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