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:
Oct. 19, 2021
Filed:
Jan. 24, 2018
China National Petroleum Corporation, Beijing, CN;
Xinjiang Petroleum Administration Engineering Technology Company, Kelamayi, CN;
Dexin Pang, Beijing, CN;
Abulimiti Aibaibu, Beijing, CN;
Xinwei Guo, Beijing, CN;
Qian Zhao, Beijing, CN;
Jianlei Wang, Beijing, CN;
Wenxin Yang, Beijing, CN;
Yajing Wang, Beijing, CN;
CHINA NATIONAL PETROLEUM CORPORATION, Beijing, CN;
XINJIANG PETROLEUM ADMINISTRATION ENGINEERING TECHNOLOGY COMPANY, Kelamayi, CN;
Abstract
A coupling apparatus for coiled tubings of different diameters includes a bottom joint, a top joint, and a back cap, where a gapped slip sleeve is provided on a fitting ring groove on an outer side of an upper portion of the bottom joint, and the gapped slip sleeve is coupled with the bottom joint via a rotation preventing element capable of preventing radial rotation of the gapped slip sleeve.