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Hydraulic reducing centralizer

A centralizer and hydraulic technology, which is applied to drilling equipment, earthwork drilling, drilling pipes, etc., can solve problems that affect drilling efficiency and difficult automatic return

Pending Publication Date: 2022-03-25
JIANGSU AERO SPACE HONGPENG NUMERICAL CONTROL MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is difficult for the existing centralizer to automatically return to its position after being centralized, which will affect the drilling efficiency to a certain extent

Method used

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  • Hydraulic reducing centralizer
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  • Hydraulic reducing centralizer

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Embodiment Construction

[0013] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0014] As shown in the figure, a hydraulic variable-diameter centralizer includes a main body 1. A perforation is arranged in the middle of the main body 1 along the axial direction, and three centralizing blocks 6 that can move in the radial direction are evenly equipped on the side along the circumferential direction. Volume tube 3 and support sleeve 7 arranged inside and outside are arranged. When the mud pressure inside the drill pipe rises, the three centralizing blocks will expand outward at the same time. At this time, the disc spring is in a compressed state. When the mud pressure in the drill pipe drops, the disc spring restores the three centralizing blocks t...

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Abstract

The hydraulic variable-diameter centralizer comprises a body, a through hole is formed in the middle of the body in the axis direction, three centralizing blocks capable of moving in the radial direction are evenly assembled on the side face of the body in the circumferential direction, and a volume pipe and a supporting sleeve which are arranged inside and outside are arranged in the through hole. The centralizer has the beneficial effects that after centralizing work is completed, the centralizing block can automatically return, and the centralizing is rapid, efficient and stable; when the pressure of slurry in the drill rod is increased, the three centralizing blocks expand outwards at the same time, the belleville spring is in a compressed state at the moment, and when the pressure of the slurry in the drill rod is reduced, the three centralizing blocks are restored to the initial state through the belleville spring.

Description

technical field [0001] The invention relates to the technical field of centralizers, in particular to a hydraulic variable-diameter centralizer. Background technique [0002] Stabilizers are used to stabilize downhole drilling tools and prevent tilting. At present, the existing centralizer is difficult to automatically return to its position after being centralized, which will affect the drilling efficiency to a certain extent. Contents of the invention [0003] In order to solve the above problems, the invention discloses a hydraulic variable diameter centralizer. [0004] The specific plan is as follows: [0005] A hydraulic variable-diameter centralizer, characterized in that it includes a main body, the middle part of the main body is provided with a perforation along the axial direction, and the side is uniformly equipped with three centralizing blocks that can move in the radial direction along the circumferential direction, and the perforation is provided with Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10
CPCE21B17/1078E21B17/1042
Inventor 陈燕阎卫军朱振今赵昱开
Owner JIANGSU AERO SPACE HONGPENG NUMERICAL CONTROL MACHINERY