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. 11, 2023
Filed:
Aug. 15, 2022
China University of Petroleum (East China), Shandong, CN;
Wensheng Xiao, Shandong, CN;
Lianpeng Mei, Shandong, CN;
Junguo Cui, Shandong, CN;
Qingxue Zhang, Shandong, CN;
Hongyan Wang, Shandong, CN;
Lei Wu, Shandong, CN;
Changjiang Li, Shandong, CN;
Liping Tan, Shandong, CN;
Chao Liu, Shandong, CN;
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Shandong, CN;
Abstract
A deepwater subsea coiled tubing drilling rig includes a lifting rack having an upper rack and a lower rack which are sleeved with each other and connected by a lifting device. A working space is enclosed by the upper rack and the lower rack, and an underwater connecting and disconnecting tool is installed in the working space; the working space is transformed between a high-position large-space state for connecting and disconnecting through the tool and a low-position small-space state for the drilling process, along with the up-down movement of the upper rack. The upper rack is provided with an underwater coiled tubing system used for lowering and lifting a downhole tool combination, and the lower rack is provided with a wellhead device.