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:
Mar. 19, 2024
Filed:
Jun. 10, 2021
China Petroleum & Chemical Corporation, Beijing, CN;
Sinopec Southwest Oil & Gas Company, Sichuan, CN;
Zhimin Hou, Sichuan, CN;
Dan Hu, Sichuan, CN;
Qiang Wang, Sichuan, CN;
Yijun Zhou, Sichuan, CN;
Jiang Qian, Sichuan, CN;
Chen Chen, Sichuan, CN;
Tao Liu, Sichuan, CN;
Jianfa Ci, Sichuan, CN;
Wenfeng Pang, Sichuan, CN;
Wenjiang Teng, Sichuan, CN;
CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing, CN;
SINOPEC SOUTHWEST OIL & GAS COMPANY, Sichuan, CN;
Abstract
A sliding sleeve device has an outer cylinder, a circulation hole being provided in the wall of the outer cylinder; and an inner cylinder provided in an inner cavity of the outer cylinder. In an initial state, the inner cylinder and the outer cylinder are fixed to each other to seal the circulation hole. In a first state, the inner cylinder is movable relative to the outer cylinder, thereby unsealing the circulation hole. A protection mechanism is provided in the circulation hole, which has an inner member located on the radially inner side and an outer member located on the radially outer side.