Coring Drill Rods and Coring Devices
A technology for core drilling and sampling devices, which is applied to drill pipes, undisturbed core extraction devices, drill pipes, etc., can solve the problems of large gas loss, poor originality of coal samples, and inaccurate gas content data in coal seams, and achieve gas content accurate effect
Active Publication Date: 2017-10-31
PINGAN KAICHENG INTELLIGENT SAFETY EQUIP +1
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Problems solved by technology
[0005] The present invention provides a coring drill rod and a coring device, which are used to solve the problem of coal core sampling in the prior art, where the obtained coal samples are poor in originality and have a large amount of gas loss, resulting in the The technical problem that the gas content data of the coal seam obtained is inaccurate
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Embodiment Construction
[0032] The coring drill rod involved in the present invention can be applied to the scene of fixed-point sampling of coal cores in the field of coal mines to measure the gas content of coal seams.
[0033] The traditional methods of sampling coal core include drilling sampling and double-deck drill pipe sampling; among them, drilling sampling is to drill the coal seam to a certain depth, and take out coal samples under the action of wind or water; using double-deck drilling Rod sampling is to send air or water to the center hole of the drill pipe from an external air supply or water supply device. Bring out under the action of wind (or water) under pressure. The above two kinds of coal samples are taken from shallow holes to deep holes. Due to the long drilling length, the powder discharge method is wind powder discharge or hydraulic powder discharge. The coal samples taken out have loose coal body and large gas loss. It cannot truly reflect the authenticity of the gas conten...
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The present invention provides a coring drill rod and a coring device. The coring drill rod comprises: a drill rod body, a spacer sleeve, a positioning pin and an elastic device located inside the drill rod body; the first end of the drill rod body and the coal The coring inner drill bit in the core sampling device is connected, and the second end of the drill pipe body is connected with the geological drill pipe; a positioning hole is opened on the first side wall of the drill pipe body, the elastic device is located in the limit sleeve, and the positioning pin is fixed. It is arranged on the first end of the elastic device, and the second end of the elastic device is fixed on the inner side of the second side wall of the drill pipe body and the first side wall; the limit sleeve is used for Limit the positioning pin and the height of the positioning pin protruding from the positioning hole. The coring drill rod provided by the present invention can make the coal core obtained by the outer core bit fall into the coring space without being carried out with the wind or water, which can truly reflect the authenticity of the gas content at the place where the coal sample is taken , and then the gas content measured according to the original coal core is more accurate.
Description
technical field [0001] The invention relates to coal mining technology, in particular to a coring drill rod and a coring device. Background technique [0002] Before the coal seam is mined, it is necessary to pre-treat the coal seam in a large area to achieve the purpose of pressure relief of the coal seam, gas discharge and change of the physical and mechanical properties of the coal seam, so as to eliminate the outburst danger of the coal seam in a large area. The coal and gas outburst risk prediction is divided into regional outburst risk prediction and working face outburst risk prediction. When selecting outburst prevention measures, the design and construction management should be carried out according to the principle of regional outburst prevention measures first and local outburst prevention measures supplemented, and the determination of coal seam gas content is the main index to test whether the regional outburst prevention measures are effective. [0003] In the...
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IPC IPC(8): E21B17/00E21B25/00
Inventor 李拥军吴传祥薛鸿渐陈涛王冲卞士军张成
Owner PINGAN KAICHENG INTELLIGENT SAFETY EQUIP