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公开(公告)号：US10830018B1
公开(公告)日：2020-11-10
申请号：US16960024
申请日：2018-10-18
发明人： Shuxun Sang , Shiqi Liu , Liwen Cao , Xiaozhi Zhou , Haiwen Wang , Huihu Liu , Zicheng Li , Huazhou Huang , Changjiang Liu , Hongjie Xu , Ran Wang , Jinlong Jia , Shuyun Zhu
IPC分类号： E21B43/12 , E21B41/00 , E21B47/00 , E21B10/32 , E21B43/34 , E21B7/28 , E21B43/20 , E21B43/29 , E21B7/04
摘要： A method of extracting gas from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity is provided. A horizontal well drilling and reaming subsystem constructs a U-shaped well in which a horizontal well adjoins a vertical well, and performs a reaming process on a horizontal section of the horizontal well to enlarge a hole diameter. A horizontal well hole-collapse cavity-construction depressurization excitation subsystem performs pressure-pulse excitation and stress release on the horizontal well of tectonically-deformed coal bed methane, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section along a depressurizing space. A product lifting subsystem pulverizes the coal and lifts the mixture towards a wellhead of a vertical well. A gas-liquid-solid separation subsystem separates the coal, liquid and gas. A monitoring and control subsystem detects and controls the operation conditions and the execution processes of technical equipment in real time.
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公开(公告)号：US10934817B2
公开(公告)日：2021-03-02
申请号：US16960023
申请日：2018-10-18
发明人： Shuxun Sang , Shiqi Liu , Liwen Cao , Xiaozhi Zhou , Haiwen Wang , Huihu Liu , Zicheng Li , Huazhou Huang , Changjiang Liu , Hongjie Xu , Ran Wang , Jinlong Jia , Shuyun Zhu
摘要： A system for extracting gas from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity is provided. A horizontal well is constructed by a horizontal well drilling and reaming subsystem and adjoins a vertical well to form a U-shaped well, and a horizontal section of the horizontal well is reamed to enlarge hole diameter. A horizontal well hole-collapse cavity-construction depressurization excitation subsystem performs pressure-pulse excitation and stress release on the horizontal well of tectonically-deformed coal bed methane, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section along a depressurizing space. A product lifting subsystem further pulverizes the coal and lifts the mixture towards a wellhead of a vertical well. A gas-liquid-solid separation subsystem separates the coal, liquid and gas. A monitoring and control subsystem detects and controls the operation conditions and the execution processes of technical equipment in real time.
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公开(公告)号：US11035228B2
公开(公告)日：2021-06-15
申请号：US16757771
申请日：2018-11-12
申请人： China University of Mining and Technology , XUZHOU OLIVINE GEOSCIENCE & GEOTECH CO., LTD , CHINA UNIVERSITY OF PETROLEUM, EAST CHINA , ANHUI UNIVERSITY OF SCIENCE AND TECHNOLOGY , WUHAN INSTITUTE OF TECHNOLOGY
发明人： Shuxun Sang , Haiwen Wang , Xiaozhi Zhou , Liwen Cao , Shiqi Liu , Huihu Liu , Zicheng Li , Jinlong Jia , Huazhou Huang , Changjiang Liu , Hongjie Xu , Ran Wang , Shuyun Zhu
摘要： A simulation test system for gas extraction from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity. A coal series stratum structure reconstruction and similar material simulation subsystem simulates a tectonically-deformed coal reservoir. A horizontal well drilling and reaming simulation subsystem constructs a U-shaped well in which a horizontal well adjoins a vertical well, and performs a reaming process on a horizontal section thereof. A horizontal well hole-collapse cavity-construction depressurization excitation simulation subsystem performs pressure-pulse excitation and stress release on the horizontal well, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section. A product lifting simulation subsystem further pulverizes the coal and lifts the mixture. A gas-liquid-solid separation simulation subsystem separates the coal, liquid and gas. A monitoring and control subsystem detects and controls the operation and the execution processes of equipment in real time.
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公开(公告)号：US10995572B2
公开(公告)日：2021-05-04
申请号：US16761497
申请日：2018-11-12
申请人： China University of Mining and Technology , XUZHOU OLIVINE GEOSCIENCE & GEOTECH CO., LTD , CHINA UNIVERSITY OF PETROLEUM, EAST CHINA , ANHUI UNIVERSITY OF SCIENCE AND TECHNOLOGY , WUHAN INSTITUTE OF TECHNOLOGY
发明人： Shuxun Sang , Xiaozhi Zhou , Liweng Cao , Shiqi Liu , Haiwen Wang , Huihu Liu , Zicheng Li , Jinlong Jia , Huazhou Huang , Changjiang Liu , Hongjie Xu , Ran Wang , Shuyun Zhu
摘要： A simulation test method for gas extraction from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity. A coal series stratum structure reconstruction and similar material simulation subsystem simulates a tectonically-deformed coal reservoir. A horizontal well drilling and reaming simulation subsystem constructs a U-shaped well in which a horizontal well adjoins a vertical well, and performs a reaming process on a horizontal section thereof. A horizontal well hole-collapse cavity-construction depressurization excitation simulation subsystem performs pressure-pulse excitation and stress release on the horizontal well, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section. A product lifting simulation subsystem further pulverizes the coal and lifts the mixture. A gas-liquid-solid separation simulation subsystem separates the coal, liquid and gas. A monitoring and control subsystem detects and controls the operation and the execution processes of equipment in real time.
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