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:
Apr. 02, 2024
Filed:
May. 25, 2021
China National Petroleum Corporation, Beijing, CN;
Cnpc Chuanqing Drilling Engineering Company Limited, Sichuan, CN;
Jing Bai, Sichuan, CN;
Jichuan Zhang, Sichuan, CN;
Dengyun Lu, Sichuan, CN;
Lei Li, Sichuan, CN;
Chongjun Huang, Sichuan, CN;
Lichun Jia, Sichuan, CN;
Chong Liao, Sichuan, CN;
Liexiang Han, Sichuan, CN;
Dejun Zhang, Sichuan, CN;
Gui Tang, Sichuan, CN;
CHINA NATIONAL PETROLEUM CORPORATION, Beijing, CN;
CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED, Sichuan, CN;
Abstract
A method for remotely shutting down a downhole unit of a rotary steering system from ground includes steps of: a: calculating a pressure difference Pbetween a front end and a rear end of the drill water hole; b: calculating an extension loss ΔP; c: calculating a pressure Pat the riser after turning on the downlink device; d: calculating an opening area Sof the throttle valve of the downlink device; and e: adjusting the throttle valve to a calculated opening degree; automatically targeting the function block that needs to be cut off according to a flow change detected downhole, and shutting down the downhole unit. The method can realize self-protection and continuous operation of the entire rotary steering system, reduce frequency of inspection that needs to pull back the drill when the rotary steering system is abnormal, improve drilling efficiency, and reduce costs.