Near-bit circumferential resonance impacter

Abstract

The invention relates to a near-bit circumferential resonance impacter. The near-bit circumferential resonance impacter comprises a housing pup joint, a guide part, the resonance impacter and a transmission pup joint, wherein the lower part of the housing pup joint is connected with the transmission pup joint; the guide part and the resonance impacter are mounted between the housing pup joint and the transmission pup joint; the guide part comprises a T-shaped inner lining pipe and a V-shaped outer sleeve pipe; the T-shaped inner lining pipe is arranged on the V-shaped outer sleeve pipe; a distribution hole is formed in the upper end of the V-shaped outer sleeve pipe; the lower end port of the V-shaped outer sleeve pipe is communicated with an inlet of the resonance impacter; an outlet of the resonance impacter is communicated with the transmission pup joint; the resonance impacter is provided with a hydraulic hammer; a hammer anvil on the outer surface of the hydraulic hammer is positioned in an impacting groove of a hammer housing; an impacting flow channel comprises the impacting groove; a positioning key on the inner surface of the hydraulic hammer extends into a positioning groove of a starter; and a pressure relief flow channel comprises the positioning groove. According to the near-bit circumferential resonance impacter, the stick slip phenomenon and the intermittent tool jamming phenomenon of a drill bit can be eliminated, the drill bit is guaranteed to stably break a rock, and the mechanical drilling speed is increased.

Description

1. Technical field: [0001] The invention relates to a drilling tool used in the field of oil drilling and rock breaking technology, in particular to a circumferential resonant impactor near a drill bit. 2. Background technology: [0002] With the continuous deepening of oil and gas exploration, the difficulty of exploration is increasing day by day, and the well depth extends from shallow to deep and ultra-deep layers, making rock breaking more difficult. During the rock breaking process of the drill bit in the deep formation, stick-slip effect and intermittent sticking phenomenon will occur. This phenomenon occurs because the bit teeth accumulate torsional energy for too long when breaking rock. This phenomenon causes the drill string near the drill bit to periodically accumulate a certain value of torque. After the rock under the drill bit teeth is broken, the torsional energy in the drill string is released quickly, and so on. This phenomenon causes the drill string to ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of circumferential resonant impactor near the drill bit, which is used to solve the problem of stick-slip effect and intermittent sticking of the drill bit when the drill bit in the prior art breaks rock in medium-hard to hard formations or abrasive formations

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