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:
Aug. 13, 2019
Filed:
Dec. 22, 2015
China University of Mining and Technology, Jiangsu, CN;
Baiquan Lin, Jiangsu, CN;
Quanle Zou, Jiangsu, CN;
Ting Liu, Jiangsu, CN;
Chang Guo, Jiangsu, CN;
Chuanjie Zhu, Jiangsu, CN;
Jia Kong, Jiangsu, CN;
Fazhi Yan, Jiangsu, CN;
Hao Yao, Jiangsu, CN;
Yidou Hong, Jiangsu, CN;
Abstract
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.