Auxiliary rock breaking drilling tool for coiled tubing operation
A technology for rock breaking and operation, which is applied in the fields of drilling with liquid/gas jet drilling, drilling equipment, and earth-moving drilling, etc., and can solve problems such as restricting the development of coiled tubing drilling technology.
Active Publication Date: 2021-09-14
YANGTZE UNIVERSITY
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Problems solved by technology
However, because the coiled tubing itself cannot rotate, and the deeper the formation, the greater the mechanical speed required, it is difficult to be widely used in deep and ultra-deep formations with poor drillability, which restricts the development of coiled tubing drilling technology. develop
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[0036] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] The invention provides an auxiliary rock-breaking drilling tool for coiled tubing operations, the structure of which is as follows: figure 1 As shown, it includes a housing 1, a drill bit 2, a hydraulic drive 3 and a jet generating mechanism 4, wherein the top of the housing 1 is fixedly connected to the drill pipe, and the bottom of the housing 1 is provided with a water outlet 10; the drill bit 2 is rotatably installed on the The bottom of the casing 1; the hydraulic drive 3 is fixedly installed on the bottom of the casing 1, and its output end is fixedly connected with the drill bit 2,...
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The invention discloses an auxiliary rock breaking drilling tool for coiled tubing operation. The auxiliary rock breaking drilling tool comprises a shell, a drill bit, a hydraulic driving part and a jet flow generation mechanism, wherein the top of the shell is fixedly connected with a drill rod, and a water outlet is formed in the bottom of the shell; the drill bit is rotationally installed at the bottom of the shell; the hydraulic driving part is fixedly installed at the bottom of the shell, and the output end of the hydraulic driving part is fixedly connected with the drill bit; and the jet flow generation mechanism is fixedly installed in the shell and communicated with the water outlet and a water inlet of the hydraulic driving part. The jet flow generation mechanism can generate high-pressure jet flow to impact rock so as to assist in rock breaking, the torque needed by the drill bit during rock breaking is reduced, the drilling speed is greatly increased, and the mechanical drilling speed in deep layers and ultra-deep layers can be effectively increased; and the jet flow generation mechanism can also generate part of hydraulic energy to drive the hydraulic driving part to work and drive the drill bit to rotate to break rock, and therefore the problem that a coiled tubing cannot rotate, and consequently efficient drilling cannot be achieved is solved.
Description
technical field [0001] The invention relates to the technical field of oil and gas drilling equipment, in particular to an auxiliary rock-breaking drilling tool for coiled tubing operations. Background technique [0002] Coiled tubing drilling is an emerging oil drilling technology. Compared with conventional methods, it has the advantages of low cost, short cycle, simple equipment, and reliable operation. It is widely used in various occasions of oil drilling. However, because the coiled tubing itself cannot rotate, and the deeper the formation, the greater the mechanical speed required, it is difficult to be widely used in deep and ultra-deep formations with poor drillability, which restricts the development of coiled tubing drilling technology. develop. Therefore, how to find auxiliary drilling tools to improve the applicability of coiled tubing in deep and ultra-deep formations with poor drillability is an urgent problem to be solved. Contents of the invention [000...
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IPC IPC(8): E21B7/18E21B4/02E21B21/00
CPCE21B7/18E21B4/02E21B21/00Y02E10/20
Inventor 刘旭辉余明浩
Owner YANGTZE UNIVERSITY