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公开(公告)号：US11131172B2
公开(公告)日：2021-09-28
申请号：US16759733
申请日：2018-10-29
申请人： China University of Mining and Technology , XUZHOU BOAN SCIENCE & TECHNOLOGY DEVELOPMENT CO., LTD
发明人： Baiquan Lin , Yang Zhao , Wei Yang , Qingzhao Li
IPC分类号： E21B43/26 , E21B43/247 , E21B43/00 , E21B43/16
摘要： A method for extracting gas by fracturing a coal seam through a combination of hydraulic slotting and multi-stage combustion impact wave comprises cutting slots in an impact borehole using a hydraulic slotting equipment to perform pressure relief and permeability enhancement on a coal seam and enlarge a N2 (nitrogen gas) or CO2 (carbon dioxide gas) storage space, injecting a large amount of N2 or CO2 into the borehole by means of a high pressure gas cylinder and a pressure reducing valve through a gas injection and extraction pipe, then injecting a certain amount of methane and dry air into a high-temperature and high-pressure combustion chamber by means of the high pressure gas cylinder and the pressure reducing valve, so that the gases are mixed and combusted to form high-temperature and high-pressure impact wave to push a piston to compress the N2 or CO2, thereby generating a large number of factures on the coal seam around the impact borehole under guiding action of the slots. The impact wave is repeatedly generated to form a multi-stage impact, and the impact of the next stage is based on the impact of the previous stage, so that the fractures on the coal seam around the borehole are further expanded and run through. After the N2 or CO2 is compressed by means of the multi-stage impact, more fracture networks are formed on the coal seam around the borehole under the guiding action of the slots and the fractures, thereby enhancing the borehole-based efficient gas extraction.
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2.发明授权公开(公告)号：US10816312B2
公开(公告)日：2020-10-27
申请号：US16632883
申请日：2018-10-29
申请人： China University of Mining and Technology , XUZHOU BOAN SCIENCE & TECHNOLOGY DEVELOPMENT CO., LTD
发明人： Wei Yang , Baiquan Lin , Changzheng Lu , Ru Jia , Minghua Lin
IPC分类号： F42D1/18 , E21B33/127 , E21B34/06 , E21C37/00
摘要： An integrated hole sealing, device includes a capsule plug, an outer capsule having a first hole site, an inner capsule having a second hole site, a capsule water injection pipe, a borehole water injection pipe and a tapered plug. Two ends of the outer capsule and the inner capsule are respectively fixed on the capsule plug and the tapered plug. The capsule plug, the tapered plug, the outer capsule and the inner capsule form a closed hollow cylindrical cavity. A middle part of the inner capsule is a hollow pipeline, and two ends thereof respectively correspond to the first and second hole sites. The borehole water injection pipe passes through the hollow cylindrical cavity. A part, located in the hollow cylindrical cavity, of the borehole water injection pipe is telescopically wound outside the inner capsule. The capsule water injection pipe passes through the capsule plug and extends into the hollow cylindrical cavity.
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公开(公告)号：US10808514B2
公开(公告)日：2020-10-20
申请号：US16632885
申请日：2018-10-29
申请人： China University of Mining and Technology , XUZHOU BOAN SCIENCE & TECHNOLOGY DEVELOPMENT CO., LTD
发明人： Baiquan Lin , Yang Zhao , Wei Yang
摘要： A multi-stage combustion impact wave coal mass cracking and heat injection alternating intensified gas extracting method is provided. A large amount of N2 or CO2 is injected into a drill hole by a heat injection and gas injection extracting pipe and by a high-pressure gas cylinder and a reducing valve, then a certain amount of methane and dry air are injected into a high-temperature and high-pressure combustion chamber by the high-pressure gas cylinder and the reducing valve, to be mixed and combusted to form high-temperature and high-pressure impact wave. High-temperature vapour is injected into the drill holes by the heat injection and gas injection extracting pipe to promote desorption of the coal masses.
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公开(公告)号：US10895120B2
公开(公告)日：2021-01-19
申请号：US16642378
申请日：2018-10-29
申请人： China University of Mining and Technology , XUZHOU BOAN SCIENCE & TECHNOLOGY DEVELOPMENT CO., LTD
发明人： Wei Yang , Baiquan Lin , Minghua Lin , Ru Jia , Changzheng Lu
IPC分类号： E21B21/015 , E21F5/20 , E21B21/01
摘要： A dust suction hood includes a tapered outer cover, a cylindrical outer cover, a tapered inner baffle plate disposed in the tapered outer cover, and a first blocking member matched with an opening in the other end of the cylindrical outer cover. A top opening of the tapered outer cover is matched with an opening in one end of the cylindrical outer cover. A side wall opening of the cylindrical outer cover serves as a dust outlet. A first gap is formed in the tapered outer cover. A first dust suction port is formed between bottom openings of the tapered inner baffle plate and the tapered outer cover. A first drill pipe connecting port is formed in the first blocking member. A drill pipe of the mine drill passes through the first drill pipe connecting port to penetrate the dust suction hood on the drill pipe.
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公开(公告)号：US11060384B2
公开(公告)日：2021-07-13
申请号：US16090080
申请日：2017-12-04
发明人： Chuanjie Zhu , Baiquan Lin , Zishan Gao , Ximiao Lu
摘要： In a method, a gyroscope and an endoscopic camera are first used to investigate coal-seam strike trend, coal-seam dip trend, and coal-seam thickness data of a to-be-extracted area. According to gas extraction standard requirements of a to-be-extracted area, boreholes are then designed and constructed, and trajectories of boreholes are tracked to obtain a correspondence relationship between designed borehole parameters and actual borehole trajectory parameters. Next, drilling parameters are adjusted according to the correspondence relationship between the designed borehole parameters and the actual borehole parameters to construct boreholes at predetermined borehole locations. Subsequently, the boreholes are connected to an extraction pipeline, and gas extraction flow rates and gas extraction amounts per meter of the boreholes are observed. Eventually, other boreholes are designed and constructed according to the adjusted borehole construction parameters and extraction data. After being constructed, the boreholes are connected to perform gas extraction.
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6.发明授权公开(公告)号：US10370942B2
公开(公告)日：2019-08-06
申请号：US15325506
申请日：2015-12-21
发明人： Baiquan Lin , Ting Liu , Quanle Zou , Chang Guo , Chuanjie Zhu , Hao Yao , Fazhi Yan , Jia Kong , Yidu Hong
摘要： A method for combining integrated drilling, flushing and slotting with thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coalbed areas. A gas extraction borehole is drilled within a certain distance of a predetermined drilling, flushing and slotting borehole, and, once sealed, is used for gas extraction. An integrated drilling, flushing and slotting drill bit is used to sink the borehole, which is then sealed. Concentration variation in the gas extraction borehole is monitored in real time, and when concentration is below 30%, borehole is opened and high-temperature steam is injected by means of a steam generator, after which the borehole is again closed. Drilling a drilling, flushing and slotting borehole increases pressure relief space and the surface of exposed coal, relieves stress on the coal body, and increases gas permeability of the coalbed, while the injection of high-temperature steam promotes gas desorption in the coal body, promotes crack propagation around the borehole, and increases channels for gas flow, thus achieving highly efficient extraction of gas from the coalbed.
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7.发明申请公开(公告)号：US20170145794A1
公开(公告)日：2017-05-25
申请号：US15325506
申请日：2015-12-21
发明人： Baiquan Lin , Ting Liu , Quanle Zou , Chang Guo , Chuanjie Zhu , Hao Yao , Fazhi Yan , Jia Kong , Yidu Hong
CPC分类号： E21B43/006 , E21B7/00 , E21B43/24 , E21B43/30 , E21F7/00
摘要： A method for combining integrated drilling, flushing and slotting with thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coalbed areas. A gas extraction borehole is drilled within a certain distance of a predetermined drilling, flushing and slotting borehole, and, once sealed, is used for gas extraction. An integrated drilling, flushing and slotting drill bit is used to sink the borehole, which is then sealed. Concentration variation in the gas extraction borehole is monitored in real time, and when concentration is below 30%, borehole is opened and high-temperature steam is injected by means of a steam generator, after which the borehole is again closed. Drilling a drilling, flushing and slotting borehole increases pressure relief space and the surface of exposed coal, relieves stress on the coal body, and increases gas permeability of the coalbed, while the injection of high-temperature steam promotes gas desorption in the coal body, promotes crack propagation around the borehole, and increases channels for gas flow, thus achieving highly efficient extraction of gas from the coalbed.
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8.发明授权公开(公告)号：US10472963B2
公开(公告)日：2019-11-12
申请号：US16097828
申请日：2017-12-01
发明人： Baiquan Lin , Tong Liu , Ting Liu , Wei Yang , He Li , Zhanbo Huang , Rui Wang , Yihan Wang
IPC分类号： E21F7/00
摘要： A method for stepwise construction of a preferential gas migration pathway at a stope in a coal seam. First, a gas migration pathway is preliminarily formed at a stope depending on a mining effect of mining in a first mined seam. construction and stabilization method of gob-side entry retaining in deep strata, and a method of manual-guided pre-fracturing boreholes are then used to perform active construction respectively in external space and the outside of coal-rock mass to form preferential gas migration pathways. Eventually, under the effect of mining-induced stress, a system of preferential gas migration pathways connected to each other at the stope is further formed.
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公开(公告)号：US10060238B2
公开(公告)日：2018-08-28
申请号：US15322457
申请日：2015-12-22
发明人： Baiquan Lin , Chang Guo , Quanle Zou , Ting Liu , Chuanjie Zhu , Jia Kong , Fazhi Yan , Hao Yao , Yidu Hong
CPC分类号： E21B43/24 , E21B7/18 , E21B41/0078 , E21B43/26 , E21F7/00
摘要： A method for combining integrated drilling and slotting with oscillating thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coal seam areas. A number of slots are formed within a thermal injection/extraction borehole by means of integrated drilling and slotting technology; a steam generator, is then used to three high-pressure, cyclically temperature-changing steam into said borehole; the steam passing through a spinning, oscillating-pulse jet nozzle forms an oscillating superheated steam, heating the coal body. The present method overcomes the limitations of simple permeability-increasing techniques, the slotting by means of hydraulic. pressure significantly increasing the pressure relief range of a single borehole and forming a fracture network that provides channels for passage of the superheated steam, while oscillating variation in steam temperature and pressure also promote crack propagation and perforation of the coal body; the combined effect of the two enhances the efficiency of gas desorption and extraction.
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10.发明授权公开(公告)号：US09605512B2
公开(公告)日：2017-03-28
申请号：US14416004
申请日：2014-01-27
发明人： Baiquan Lin , Qingzhao Li
CPC分类号： E21B36/00 , E21B36/006 , E21B41/0085 , E21B43/122 , E21F3/00 , E21F7/00 , Y02P80/156
摘要： A distributed combined cooling, heating and power energy system for gas extraction in a coal mining area, which belongs to an energy system for gas production. A gas extraction pump station, a gas storage tank, a water-sealing flame arrester, a wire mesh filter, a first pipeline flame arrester, a wet-type bleeding valve and a cyclone dehydrator are sequentially connected; an outlet of the cyclone dehydrator is divided into two branches, one branch sequentially connected with a second pipeline flame arrester, a proportioning mixer, a gas power machine, a waste heat boiler and a waste heat-type double-effect lithium bromide absorption water chiller/heater unit, and the other connected with a gas-type double-effect lithium bromide absorption water chiller/heater unit; a first power generator is connected with the gas power machine, a water storage tank outlet is connected with a pressurizing pump, a second power generator is connected with a steam turbine and driven by the steam power machine to generate power, and cold/hot water of the waste heat-type water chiller/heater unit and the gas-type water chiller/heater unit is delivered through an energy supply pipeline after collection and mixing. With the power energy system mining area, clean production and utilization of coal-mine gas and economic development of coal mine areas are realized.
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