JCIPRNET
System for extracting gas from tectonically-deformed coal seam in-situ by depressurizing horizontal well cavity
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.
XUZHOU OLIVINE GEOSCIENCE & GEOTECH CO., LTD China University of Mining and Technology
E E E E E E E E E E E E
E21B E21F E21B E21F E21B E21C E21B E21B E21F E21B E21B E21C
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Shiqi Zicheng Shuyun Changjiang Jinlong Haiwen Ran Xiaozhi Huihu Liwen Huazhou Shuxun Hongjie
Liu Li Zhu Liu Jia Wang Wang Zhou Liu Cao Huang Sang Xu