While-drilling testing method and device for coal seam gas parameters

A technology for coal seam gas and testing device, which is applied in drilling equipment and methods, gas discharge, safety devices and other directions, can solve the problems of difficult drilling, inability to adjust the length of the drill bit, cumbersome and other problems, and achieves the effect of good and stable support.

CN109403865AActive Publication Date: 2019-03-01NORTH CHINA INST OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-03-01

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Abstract

The invention provides a while-drilling testing method and device for coal seam gas parameters. The while-drilling testingdevice comprises a hand-holdingsleeve, a hand-holdingrod, a connecting casing,a butting shaft, a connecting pipe, fastening bolts, a strip-shaped port iron pin, a removable hard coal seam assisted drilling bit structure, fixed hexagon socket bolts, a drilling extension rod structure with the adjustable length, an auxiliary moving supporting transport frame, a during-drilling dust auxiliary adsorptionsplash-preventing shield structure, a heat dissipating shield structure capable of conducting remote data transmission, a connecting plate and a fixing casing. According to thewhile-drilling testing method and device for the coal seam gas parameters, drilling teeth, a flow-guiding groove, a connection liner pipe and a drill bit body are arranged, coal slag produced during drilling through a cone-shaped bit can be discharged in time through the flow-guiding groove, and the problem of drilled hole blocking is avoided; through the drilling teeth, good auxiliary drilling work can be achieved, and influence of a hard coal seam on deep drilling is avoided; and final reaming operation can be conducted through the drill bit body, and it is ensured that drilling work is conducted smoothly.
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Description

technical field

[0001] The invention belongs to the technical fields of coal field gas geology, gas / coal bed gas extraction and coal mine safety, and in particular relates to a coal seam gas parameter testing method and device while drilling. Background technique

[0002] CBM occurrence, CBM resource assessment, CBM drainage, CBM development, coal seam outburst risk prediction, gas disaster control and effect evaluation all involve coal seam gas parameter testing. At present, parameters such as coal seam gas content are mainly tested by sampling tests. The initial velocity of borehole gas emission is mainly tested in shallow holes on the working face. At present, the method of fixed-point sampling and rapid determination of gas content in coal seams is more accurate, and the sampling process is complicated. Accuracy is greatly affected. At present, the rapid test of coal seam gas content by drilling chip extraction method, which is widely used, has poorer sampling fixed po...

Examples

Embodiment Construction

[0050] The present invention will be further described below in conjunction with accompanying drawing:

[0051] In the picture:

[0052] as attached figure 2 to attach Figure 8 Shown:

[0053] Coal seam gas parameter testing device while drilling, including hand sleeve 1, hand rod 2, connecting sleeve 3, docking shaft 4, connecting pipe 5, fastening bolt 6, in-line iron pin 7, detachable hard coal seam Auxiliary drilling drill bit structure 8, fixed hex socket socket bolt 9, adjustable length drilling extension rod structure 10, auxiliary mobile support transfer frame 11, dust auxiliary adsorption anti-splash shield structure 12 during drilling, remote data transmission and heat dissipation The cover structure 13, the connecting plate 14 and the fixed sleeve 15, the hand sleeves 1 are longitudinally socketed in the middle of the outer wall of the hand bar 2; the longitudinal inner ends of the hand bar 2 are respectively welded to the connecting sleeve The upper and lower...