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. 16, 2021
Filed:
Oct. 12, 2019
China University of Mining and Technology, Jiangsu, CN;
Xuzhou Fuan Technology Co., Ltd., Xuzhou, CN;
Enyuan Wang, Jiangsu, CN;
Hao Wang, Jiangsu, CN;
Jianchun Ou, Jiangsu, CN;
Rongxi Shen, Jiangsu, CN;
Xiyuan Wang, Jiangsu, CN;
Baolin Li, Jiangsu, CN;
Zhonghui Li, Jiangsu, CN;
Xiaofei Liu, Jiangsu, CN;
China University of Mining and Technology, Jiangsu, CN;
XUZHOU FUAN TECHNOLOGY CO., LTD., Xuzhou, CN;
Abstract
The present invention provides an inversion calculation method of coal-bed gas parameters of fast test while-drilling. The technical solution is that an inversion calculation method of coal-bed gas parameters of fast test while-drilling includes: during drilling in a coal bed, testing a gas flow and a gas concentration of an orifice in real time while-drilling, calculating drilling gas discharge amounts of the orifice, inversely calculating a coal-bed gas pressure at a drill bit based on borehole and coal-bed permeability parameters, and calculating a coal-bed gas content according to a gas content and gas pressure relational expression. The present invention has the beneficial effects that the present invention does not occupy the drilling and drill rod replacement time, is accurate, convenient, real-time and fast, and can test and calculate the coal-bed gas parameters of each section along the whole borehole length.