Drilling gas flow measuring device and method for coal seam rich in water and high in gas pressure

• Main Authors: LIU JUN, WANG JIANWEI, LIN FUJIN, NIE HAIYANG, SUN BINGXING, ZHU ZHENGLI, LI DAYONG, XU TENGFEI, XIANG YANBIN, HE YUNWEN, RAN QINGLEI, HUANG GUANGLI, ZHANG FENG, CHENG JIANSHENG, MA ZHIYONG, LI ZHIHENG, YANG LEILEI
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2021
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention belongs to the field of coal seam drilling gas flow measuring devices, and relates to a drilling gas flow measuring device and method for a coal seam rich in water and high in gas pressure. The drilling gas flow measuring device comprises a gas collecting buffer device communicating with a drilling hole, a water collector arranged outside the gas collecting buffer device, and a flow measuring instrument meter communicating with the gas collecting buffer device, a drain hole communicating with the water collector is formed in the outer wall above a water storage chamber, and a liquid meter is mounted on the drain hole. According to the device, accumulated water in the drilling hole can be effectively prevented from being instantly released to damage a flow measuring instrument, the effect of protecting the flow measuring instrument is achieved, the influence of the accumulated water in the drilling hole on the flow measuring instrument is eliminated through the device when the gas flow in the dri