The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2020
Filed:
Oct. 18, 2018
China University of Mining and Technology, Jiangsu, CN;
Xuzhou Olivine Geoscience & Geotech Co., Ltd, Jiangsu, CN;
Shuxun Sang, Jiangsu, CN;
Shiqi Liu, Jiangsu, CN;
Liwen Cao, Jiangsu, CN;
Xiaozhi Zhou, Jiangsu, CN;
Haiwen Wang, Shandong, CN;
Huihu Liu, Anhui, CN;
Zicheng Li, Hubei, CN;
Huazhou Huang, Jiangsu, CN;
Changjiang Liu, Shandong, CN;
Hongjie Xu, Anhui, CN;
Ran Wang, Jiangsu, CN;
Jinlong Jia, Hubei, CN;
Shuyun Zhu, Jiangsu, CN;
China University of Mining and Technology, Jiangsu, CN;
XUZHOU OLIVINE GEOSCIENCE & GEOTECH CO., LTD, Jiangsu, CN;
Abstract
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.