A two-way self-balancing rotary water jet drilling device with adjustable propulsion

Abstract

The invention discloses a dual-direction self-balance rotation water jet drilling device with adjustable propulsive force. The device comprises a sprayer, a rotation shaft, a shell and a joint used for being connected with a high pressure pipe; the sprayer and the joint are arranged at the two ends of the rotation shaft respectively, and the shell sleeves the rotation shaft; the sprayer is provided with a front spray hole used for being provided with a front spray nozzle and a rear spray hole used for being provided with a rear spray nozzle; the rotation shaft is provided with a first conicalface, the shell is provided with a second conical face matched with the first conical face, a first groove sunken in the second conical face is formed in the circumference of the second conical face,and a second groove sunken in the rotation shaft is formed in the butt joint face of the rotation shaft and the joint in the circumference direction. According to the dual-direction self-balance rotation water jet drilling device, the front and rear spray nozzles with holes different in diameter are selected for controlling the propulsive force and propulsive direction of the device. For the frontand rear spray nozzles different in specification and propulsive forces different in magnitude and direction, two cavities in the device can be automatically balanced, and high-speed rotation of thesprayer is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of coal seam gas drainage drilling, and in particular relates to a bidirectional self-balancing rotating water jet drilling device with adjustable propulsion force. Background technique [0002] High-pressure water self-rotating nozzles were mostly used in the field of pipeline cleaning in the early days. They are an efficient and multi-purpose water jet cleaning tool; in recent years, with the continuous development of coalbed methane mining technology, high-pressure water self-rotating nozzles have begun to be used in coalbed methane In the field of enhanced production technology, the high-pressure water jet energy is highly concentrated to implement crushing and cutting of coal seams and rock formations, so as to increase the air permeability of coal reservoirs. [0003] At present, the following problems exist in the existing high-pressure water self-rotating nozzles: [0004] (1) For the drilling const...

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Problems solved by technology

[0007] In order to solve the above problems, the present invention provides a two-way self-balancing rotary water jet drilling device with adjustable propulsion force, which solves the problem that the current high-pressure water self-rotating nozzle cannot achieve a large propulsion force adjustment range and propulsion force in coal seams with different hardness. Self-balancing of nozzles in different directions

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