公开(公告)号：US20180209259A1

公开(公告)日：2018-07-26

申请号：US15321891

申请日：2015-12-22

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY

发明人： Baiquan LIN ,  Quanle Zou ,  Ting Liu ,  Chang Guo ,  Chuanjie Zhu ,  Jia Kong ,  Fazhi Yan ,  Hao Yao ,  Yidou Hong

IPC分类号： E21B43/267 ,  E21B43/24 ,  E21F7/00 ,  E21B36/00

CPC分类号： E21B43/267 ,  E21B36/006 ,  E21B43/114 ,  E21B43/2405 ,  E21F7/00

摘要： A gas extraction method in which high energy gas fracturing technology is used to form a fracture network in a thermal injection borehole. Then high-pressure, cyclically temperature-changing steam is injected into the borehole using a spinning oscillating-pulse jet nozzle to form oscillating superheated steam, alternatingly impacting and heating the coal body. The high energy gas forms a fracture network that provides channels for passage of the superheated steam, while oscillating changes in steam temperature and pressure also promote crack propagation and perforation of the coal body; the combined effect of alternation of the two enhances gas desorption and extraction efficiency.

公开(公告)号：US10378327B2

公开(公告)日：2019-08-13

申请号：US15321891

申请日：2015-12-22

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY

发明人： Baiquan Lin ,  Quanle Zou ,  Ting Liu ,  Chang Guo ,  Chuanjie Zhu ,  Jia Kong ,  Fazhi Yan ,  Hao Yao ,  Yidou Hong

IPC分类号： E21B36/00 ,  E21B43/24 ,  E21B43/267 ,  E21F7/00 ,  E21B43/114

摘要： A gas extraction method in which high energy gas fracturing technology is used to form a fracture network in a thermal injection borehole. Then high-pressure, cyclically temperature-changing steam is injected into the borehole using a spinning oscillating-pulse jet nozzle to form oscillating superheated steam, alternatingly impacting and heating the coal body. The high energy gas forms a fracture network that provides channels for passage of the superheated steam, while oscillating changes in steam temperature and pressure also promote crack propagation and perforation of the coal body; the combined effect of alternation of the two enhances gas desorption and extraction efficiency.

公开(公告)号：US09869168B2

公开(公告)日：2018-01-16

申请号：US15323272

申请日：2015-12-09

申请人： China University of Mining and Technology

发明人： Baiquan Lin ,  Yidou Hong ,  Chuanjie Zhu ,  Hao Yao

IPC分类号： E21B43/24 ,  E21B33/14 ,  E21B43/30

CPC分类号： E21B43/24 ,  E21B33/14 ,  E21B43/30 ,  E21F7/00

摘要： A method for thermal-displacement-type strengthened extraction in a drill hole, suitable for efficient gas extraction in a coal mine, the method comprising the following steps: arranging an extraction drill hole and a thermal displacement drill hole at intervals in a coal seam; continuously heating coal in the drill hole to form a stable temperature field by using a heat pipe; and significantly reducing gas adsorption potential by utilizing a heat effect, prompting gas desorption, and strengthening gas extraction. The method enlarges a range of effective pressure relief influence of a single hole, increases an extraction efficiency of gas in a coal seam by more than 40%, is safe, reliable and low-cost, and is easy to operate, saving both time and labor.