Double gas circular gas supply device applied to laser directional drilling in coal seam
A technology of directional drilling and gas supply device, which is applied in directional drilling, drilling equipment, earthwork drilling and production, etc., which can solve the problems of increased cost of gas supply system, large demand for circulating gas, and complicated air production, so as to ensure safety, The effect of simple control process and cost reduction
Pending Publication Date: 2020-01-14
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology
Simply using inert gas or non-combustible gas circulation can achieve flame retardancy and chip removal effects, but their production is more complicated than air, and the demand for circulating gas in laser drilling is large, and the cost of the gas supply system is greatly increased
Method used
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Embodiment Construction
[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0025] Please refer to figure 1 and figure 2 , the embodiment of the present invention provides a dual gas circulation gas supply device for coal seam laser directional drilling, including a ground gas supply device, a gas transmission device, a recovery processing device, a detection device and a control device; the gas supply device is used for Provide nitrogen and air; the gas transmission device is used to provide a gas circulation loop; the recovery treatment device is used to recover the gas; the detection device is used to detect drilling data and gas concentration; the control device is used to for controlling the switching of the gas circulation loop;
[0026] The gas supply device includes a surface air compressor 1, a nitrogen generator 2; ...
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The invention provides a double gas circular gas supply device applied to laser directional drilling in a coal seam. The double gas circular gas supply device comprises a gas supply device including air compressors and a nitrogen maker, a gas transmission device including a gas delivery vertical pipe, a drill pipe, a blowout preventer, a drill bit and an annulus, a gas recovery device including adust fall chip removal pipeline, samplers, a filter device and an automatic ignition device, a detection device including an in-situ monitoring module and a temperature sensor and a control device including an optical fiber, gas circuit valves and a state receiving and remote console. The double gas circular gas supply device has the beneficial effects that a drilling process is monitored, and circulating gas is switched by closing the valves, so that the double gas circular gas supply device is simple in control process; the laser drilling cost is also lowered greatly while the safety is guaranteed; and returned gas is treated and recovered, so that an effects of being green, economical and environment-friendly are achieved.
Description
technical field [0001] The invention relates to the technical field of gas supply for laser directional drilling, in particular to a dual-gas circulation gas supply device and method for laser directional drilling in coal seams. Background technique [0002] When the laser drills in coalbed methane, it needs auxiliary gas medium circulation to take away the cuttings generated during drilling in a timely and sufficient manner. In view of the fact that laser drilling technology is affected by the development of high-power lasers, the specific technical means for its application in practice are relatively lacking. When performing laser directional drilling in coalbed methane, considering the unique properties of coal rocks, the circulating medium must not only be able to discharge cuttings in time during the drilling process, but also prevent the combustion and explosion of combustible gases generated during drilling and the formation of coal rocks. of burning. Simply using i...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21B7/00E21B7/04E21B21/16E21B47/00E21B47/07
CPCE21B7/00E21B7/04E21B21/16E21B47/00
Inventor 文国军吴玲玲王玉丹官东林罗耀坤
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)