Self-propelled high pressure water jet drill

Abstract

The invention discloses a self-propelled high pressure water jet drill mainly comprising a bit body, turbine rotors, an upper wear-resistant steel ball, a lower wear-resistant steel ball and a baffle.The self-propelled high pressure water jet drill is characterized in that a blind hollow shaft is arranged in the center as a support; an annular outlet is disposed on the blind hollow shaft; the front end of the blind hollow shaft is connected to the front end of the bit body; a forward nozzle and a backward nozzle are arranged on the bit body; both sides of the left and right side of the blindhollow shaft are symmetrically installed with the turbine rotor; both ends of the upper and lower end of the turbine rotor are processed with a spherical groove; with the upper and lower wear-resistant steel balls used for positioning, the upper wear-resistant steel ball is placed between the bit body and the spherical groove of the turbine rotor, and the lower wear-resistant steel ball is placedbetween the turbine rotor and the spherical groove of the baffle; the bit body and the internal baffle thereof are connected through screw threads. The self-propelled high pressure water jet drill hasthe advantages of realizing rapid continuous drilling of long holes in various rock formations, and having simple structure, reliable work and wide application prospects.

Description

Technical field [0001] The invention relates to a drilling tool that utilizes a high-pressure jet to efficiently and quickly break rocks, in particular to a self-advancing high-pressure jet nozzle for radial horizontal well drilling. Background technique [0002] With the continuous deepening of petroleum exploration and development, most of the domestic oil fields have entered the middle and late stages of production. The productivity of oil wells has declined, the extraction is difficult, the recovery rate is low, and the development cost is high. At present, the conventional sidetracking horizontal well technology is used in the development of old oilfields: firstly, a windowing tool such as a milling cone is used to open a window on the side of the casing through a whipstock, and then a sidetracking tool such as a single cone bit or a PDC bit is used to drive through the hole. Window conducts mechanical drilling of horizontal wells to restore the productivity of old wells. H...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a radial horizontal well technology using high-pressure hydraulic jet as the main driving force for rock breaking in order to solve the problems of high cost and poor economy of the existing sidetracking horizontal well technology, especially a self-propelled high-pressure water jet drill

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