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Downhole pressurization auxiliary rock breaking tool

A tool and rock-breaking technology, which is applied in the field of underground pressurized auxiliary rock-breaking tools, can solve the problems of harmful impact, difficult manufacturing, complex structure, etc., achieve stable pulse, improve service life and reliability, and solve complex structures. Effect

Active Publication Date: 2018-10-09
YANGTZE UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a simple structure, stable pulse, no harmful impact, which can effectively improve the service life and reliability, and solve the problem of complex structure, difficult manufacture, short life and harmful impact of the existing downhole booster device. Downhole pressurized auxiliary rock breaking tool

Method used

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  • Downhole pressurization auxiliary rock breaking tool

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Embodiment Construction

[0020] The downhole pressurized auxiliary rock-breaking tool includes a conversion joint 1, an upper casing 2, a lower casing 3, a turbine main shaft 4, a rotating shaft 5 and a hydraulic cylinder, and the upper casing 2 and the lower casing 3 are screwed to each other, and the upper One end of the housing 2 is threaded with a conversion joint 1; the turbine main shaft 4 is installed through the turbine assembly 6 and the symmetrically arranged central bearing 7 in the upper housing 2; the turbine assembly 6 includes a turbine rotor and a turbine stator; The lower casing 3 is equipped with a rotating shaft 5 through a thrust bearing 8, and the turbine main shaft 4 and the rotating shaft 5 are threadedly connected. The rotating shaft 5 is provided with a central through hole 25. 4 There are a plurality of distribution holes 26 uniformly distributed in the radial direction on the circumference, and the distribution holes 26 communicate with the central through hole 25 of the rota...

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Abstract

The invention relates to a downhole pressurization auxiliary rock breaking tool and belongs to the technical field of oil and gas downhole operation tools. The downhole pressurization auxiliary rock breaking tool comprises a conversion joint, an upper shell, a lower shell, a turbine spindle, a rotating shaft and a hydraulic cylinder; the turbine spindle in mounted in the upper shell, and the rotating shaft is mounted in the lower shell; the hydraulic cylinder is fixedly mounted on the position, on one side of the rotating shaft, in the lower shell, and the hydraulic cylinder and the rotating shaft are slidably connected; and a magnetic reciprocating mechanism is mounted on the position, between the hydraulic cylinder and a thrust bearing, on the rotating shaft through a sealing block. Thedownhole pressurization auxiliary rock breaking tool is simple in structure, stable in pulse and free of harmful impact; the problems that an existing downhole pressurization device is complex in structure, large in manufacturing difficulty and short in life, and harmful impact exists are solved; and the service life of the pressurization auxiliary rock breaking tool is effectively prolonged, thereliability of the pressurization auxiliary rock breaking tool is effectively improved, the rock breaking efficiency of a drill bit is improved, thus the well constructing cycle is shortened, and thedrilling cost is reduced.

Description

technical field [0001] The invention relates to an underground pressurized auxiliary rock-breaking tool, which belongs to the technical field of oil and natural gas downhole operation tools. Background technique [0002] At present, as the proportion of deep wells and ultra-deep wells in oil fields increases, the drilling speed will drop significantly when drilling encounters hard formations, and it is difficult for ordinary drilling tools to meet the construction requirements. Domestic research shows that downhole pressurized auxiliary drilling can greatly increase the ROP in oil and gas well drilling. At present, most of the domestic downhole booster devices use water pressure to push the piston, and the piston drives the hydraulic cylinder to reciprocate. The main difference between bottom well pressurization is that the reversing method is different; in order to realize the reciprocating movement of the piston, the pressure difference between the upper and lower chambers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18E21B21/00
CPCE21B7/18E21B21/00
Inventor 夏成宇刘蒙钱利勤秦伟杰李旭黄剑武进虎
Owner YANGTZE UNIVERSITY
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