Self-excited resonance drilling device and drilling method thereof

Abstract

The invention relates to a self-excitation sympathetic vibration well drilling device and method, wherein the self-excitation sympathetic vibration well drilling device comprises an upper drill rod, a drill collar, a shock absorber, an upper short connection part, a self-excitation resonator, a lower short connection part and a drill head from top to bottom. The drill collar is connected with theupper drill rod through threads. The shock absorber is connected with the drill collar through threads. The upper short connection part is connected with the shock absorber through threads. The self-excitation resonator is connected with the upper short connection part through threads. The other end of the self-excitation resonator is connected to the lower short connection part. The drill head is connected to the lower short connection part via threads. The invention is capable of making full use of lengthways vibration of the drill post, changing the harm into benefit, reducing the loss efficacy of the drill post effectively and enhancing the service life of the drill post. On the other hand, the invention is capable of converting the mechanical energy in lengthways impact and vibrationgenerated by the drill head and the drill collar to medium kinetic energy, achieving the rock crack sympathetic vibration condition and enhancing the well drilling speed.

Description

1. Technical field: [0001] The present invention relates to a kind of drilling mode which utilizes the resonance phenomenon to quickly break deep formation rocks and increase the ROP, which belongs to the field of oil drilling and rock breaking technology, and is mainly used in the fields of petroleum engineering, mining engineering, geotechnical engineering, etc., specifically The invention relates to a self-excited resonance drilling device and a drilling method thereof. 2. Background technology: [0002] The difficulties of high-efficiency rock-breaking drilling technology in deep formations mainly include: first, the existing high-efficiency rock-breaking technology has technical bottlenecks in deep formations; second, the proportion of complex formations and difficult-to-drill formations is increasing year by year. come lower. In view of the actual situation of my country's current drilling engineering and the difficulties of drilling in deep formations, it is urgent t...

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Problems solved by technology

[0006] One purpose of the present invention is to provide a self-excited resonance drilling device, which is used to solve the problems of the prior art that the drilling effect is not ideal, the mechanical penetration rate is low, drilling accidents occur frequently, and the cost is high; another purpose of the present invention is to provide this Drilling method of self-excited resonance drilling device

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