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A piston hydraulic chuck

A hydraulic chuck, piston type technology, applied in drill pipe, casing, drill pipe, etc., can solve the problem of less moving parts, achieve uniform force, reduce hydraulic leakage points, and improve the working environment.

Active Publication Date: 2018-10-30
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a piston-type hydraulic chuck, which can solve the problem of coal slag and other impurities accumulating inside the chuck, and has fewer moving parts, convenient maintenance and high reliability.

Method used

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  • A piston hydraulic chuck
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Embodiment Construction

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0028] As shown in the figure, a piston-type hydraulic chuck includes a housing 6, one end of the housing 6 is provided with a chuck body 7, and the other end is provided with an end cover 9; the chuck body 7 is provided with a clamp for clamping the drill rod Clamping device, the clamping device comprises a plurality of slips 14 distributed along the circumferential direction of the chuck body 7, a plurality of pistons 12 for pressing the slips 14 and arranged between adjacent slips 14 for opening The spring group 13 of the slip 14, the piston 12 and the slip 14 are arranged in one-to-one correspondence, and a high-pressure oil chamber M is provided between the chuck ...

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Abstract

The invention discloses a piston type hydraulic chuck which comprises a shell, wherein a chuck body is arranged at one end of the shell, and an end cover is arranged at the other end of the shell; a clamping device for clamping a drill rod is arranged in the chuck body and comprises multiple slips distributed along the peripheral direction of the chuck body, multiple pistons for compressing the slips and a spring group used for opening the slips and arranged between the adjacent slips; the pistons are in one-to-one correspondence to the slips; and a high-pressure oil cavity convenient for hydraulic oil to push the pistons to move is arranged between the chuck body and the shell. The piston type hydraulic chuck also comprises a slagging loop which comprises a slag holding cavity arranged between the slips and a slagging channel arranged between the chuck body and the end cover and communicated with the slag holding cavity. The piston type hydraulic chuck disclosed by the invention can solve the problem of accumulation of impurities such as coal slag inside a chuck, and has the advantages of few moving parts, convenience in maintenance and high reliability.

Description

technical field [0001] The invention belongs to the field of drilling rig chucks, in particular to a piston-type hydraulic chuck. Background technique [0002] The chuck is an important part of the drilling rig. Its function is to clamp the drill pipe, transmit torque and axial force to the drill pipe, and drive the drill tool to achieve rotation and drilling. Piston-type hydraulic chuck is a relatively new type of chuck, which has the advantages of long service life of key parts and easy maintenance compared with traditional rubber sleeve chucks. [0003] Existing piston type hydraulic chuck is made up of connecting plate, front end cover, rear end cover, front end cover, housing, cylinder body, piston and elastic slips etc. Among them, the elastic slips are composed of high elastic rubber and metal claws. The high-pressure oil enters the chuck from the main shaft, and is injected into the M chamber through the oil passage on the rear end cover and the housing, the hydrau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B19/10
CPCE21B19/10
Inventor 辛德忠陈航吕晋军万军罗华蒲剑陶勇谭正生张始斋李和祥宋玉壁何函李刚刘洋洋石磊
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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