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Mechanical underground vibration-absorption punching drilling tool

A percussion drilling, mechanical technology, which is applied to the driving device for drilling in the borehole, drilling equipment, earthwork drilling and mining, etc., can solve the problems of fracture failure, drill bit tooth wear, etc., and achieve the effect of simple structure and improved rock breaking efficiency

Active Publication Date: 2012-07-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the rotary percussion drilling process, the teeth of the drill bit are prone to wear and fracture failure. The reason may be the longitudinal vibration of the drill string and the resonance between the vibration of the impactor and the longitudinal vibration of the drill string.

Method used

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  • Mechanical underground vibration-absorption punching drilling tool
  • Mechanical underground vibration-absorption punching drilling tool
  • Mechanical underground vibration-absorption punching drilling tool

Examples

Experimental program
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Embodiment Construction

[0011] refer to Figure 1-4 , including a spline mandrel 2, a spline barrel 3, a shock absorbing return spring outer barrel 4, and an impact assembly outer barrel 10. The top end of the spline mandrel 2 is connected with an upper matching joint 1, and the spline barrel 3 and the shock absorbing return spring The outer cylinder 4 and the impact assembly outer cylinder 10 are integrated and can cooperate with the impact structure 12 for transmitting torque and allowing the splined mandrel 2 to reciprocate up and down. The spline mandrel 2 is located inside the spline barrel 3, the outer barrel 4 of the damping return spring and the outer barrel 10 of the impact assembly, and the outer barrel 4 of the damping return spring is provided with a spring limit joint 6 and a return spring 5 for damping. Between the vibration return spring 5 and the shoulder at the lower part of the spline mandrel 2 and the spring limit joint 6, the lower end of the spline mandrel 2 is connected to the s...

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Abstract

A mechanical underground vibration-absorption punching drilling tool comprises a spline mandrel, a spline cylinder, a vibration-reducing return spring outer cylinder, and a punching assembly outer cylinder, wherein an upper part matching joint is connected to the top end of the spline mandrel; the spline cylinder is connected with the vibration-reducing return spring outer cylinder and the punching assembly outer cylinder into a whole; the spline mandrel is arranged in the spline cylinder, the vibration-reducing return spring outer cylinder and the punching assembly outer cylinder; the lower end of the spline mandrel is connected with a shunting structure; the spline mandrel is connected with a plunger through the shunting structure; the lower end of the plunger is arranged in a punching cylinder; the lower part of the punching cylinder is arranged in a punching bearing structure; the lower end of the punching bearing structure is connected with a lower part matching joint; and a spacing structure is arranged at the lower end of the punching assembly outer cylinder. According to the invention, the vibration reduction for a drill string is combined with the high-frequency low-punching power of a drill bit, and longitudinal vibration easy to cause fatigue rupture of the drill string is converted into internal energy of a vibration-reducing return spring and punching power providing convenience for improving drilling speed, so as to fulfill rotary punching drilling and improve rock breaking efficiency.

Description

1. Technical field [0001] The invention relates to a supporting device in rotary percussion drilling operations in deep formations of oil and natural gas, in particular to a mechanical downhole vibration-absorbing percussion drilling tool. 2. Background technology [0002] At present, in rotary percussion drilling operations in deep formations of oil and natural gas, when a high-frequency, low-impact impact force is added to the upper part of the drill bit, the working efficiency of the drill bit and the rock-breaking drilling speed can be greatly improved. Rotary percussion drilling technology is a new drilling technology based on this theory. The results of research and field application show that rotary percussion drilling has the advantage of high ROP in hard formations. However, during the rotary drilling process, the drill bit teeth are prone to wear and fracture failure. The reason may be the longitudinal vibration of the drill string and the resonance between the vib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/16E21B6/00
Inventor 管志川刘永旺史玉才
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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