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Anti-eccentric steel ball centering device

A technology of anti-eccentric wear and centralizer, which is applied in the direction of drilling equipment, earthwork drilling, drill pipe, etc., can solve the problems of low production efficiency and large energy consumption, and achieve the goal of prolonging service life, reducing production cost and reducing frictional resistance Effect

Inactive Publication Date: 2014-03-26
YANCHENG HUAYI GASOLINEEUM MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects of low production efficiency and excessive energy consumption of conventional centralizers, this invention innovates an operation technology, which uses rolling friction instead of sliding friction, which improves production efficiency and prolongs the service life

Method used

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  • Anti-eccentric steel ball centering device

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with accompanying drawing.

[0010] This invention is made up of parts such as rod body 1, steel ball 2, ball cover joint 4. The steel ball 2 can rotate freely in the spherical joint 4. When the invention is connected to the downhole tubing by the sucker rod (each sucker rod is connected with an anti-eccentric wear steel ball centralizer) to realize the oil pumping operation, the outside of the rod body The gap between the steel ball 2 and the inner wall of the oil pipe will be balanced to achieve the purpose of anti-eccentric wear, and the friction between the steel ball 2 and the inner wall of the oil pipe will be reduced due to the rotation of the steel ball 2. At the same time, the two large steel balls facing each other Relative rolling friction also occurs between the ball 2 and the two small steel balls 3, greatly reducing the frictional resistance.

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Abstract

The invention discloses an anti-eccentric steel ball centering device. According to the technical scheme, twelve phi18 steel balls and twelve phi10 steel balls are regularly arrayed on the outer surface of the anti-eccentric steel ball centering device, the phi18 steel balls are covered by ball covers, advanced welding technologies are applied to ball cover connectors and a rod body to prevent the steel balls from becoming separate from the ball covers and the steel balls can freely rotate in the ball cover connectors and the rod body so that rolling friction can be generated between the phi18 steel balls and the inner wall of an oil pipe because of rotating of the steel balls in the process that an oil pumping rod does reciprocating motion vertically for pumping oil, the problem that sliding friction resistance of a former nylon sleeve and the inner wall of an oil pipe is large is solved, and working efficiency is improved.

Description

technical field [0001] The invention uses the rolling friction of the steel ball to replace the sliding friction of the conventional nylon body, greatly reduces the frictional resistance between the sucker rod and the inner wall of the oil pipe, reduces the pulling force carried by the sucker rod, and thus makes the sucker rod last longer ,durable. And the frictional resistance between the inner wall of the oil pipe is reduced, thereby prolonging the service life. technical background [0002] At present, the sucker rod centralizers used by many oilfield units are nylon body centralizers. During the oil pumping process, crude oil adheres to the nylon body, which greatly increases the sliding friction resistance between the nylon body and the inner wall of the tubing, affecting the efficiency of pumping. Especially in horizontal wells, due to the weight of the sucker rod itself and the increase in frictional resistance, it is more difficult to pull the sucker rod. At the sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10
Inventor 陈国民卞友章瞿卫国卞鼎旺
Owner YANCHENG HUAYI GASOLINEEUM MACHINERY
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