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:
Feb. 04, 2025
Filed:
Jun. 10, 2021
Differential pressure sliding sleeve, and oil and gas well fracturing construction method using same
China Petroleum & Chemical Corporation, Beijing, CN;
Sinopec Southwest Oil & Gas Company, Sichuan, CN;
Shunqu Hu, Sichuan, CN;
Yongmao Lin, Sichuan, CN;
Wei Zhao, Sichuan, CN;
Wei Lei, Sichuan, CN;
Zhi Xie, Sichuan, CN;
Zhimin Hou, Sichuan, CN;
Chen Chen, Sichuan, CN;
Qiang Wang, Sichuan, CN;
Dan Hu, Sichuan, CN;
Jingyu Cui, Sichuan, CN;
CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing, CN;
SINOPEC SOUTHWEST OIL & GAS COMPANY, Sichuan, CN;
Abstract
A differential-pressure sliding sleeve has an outer cylinder with a flow guiding hole being provided in a wall of the outer cylinder, an inner cylinder arranged in an inner cavity of the outer cylinder, an upper joint extending into the outer cylinder and fixedly connected to an upper end of the outer cylinder, a lower joint extending into the outer cylinder and fixedly connected to a lower end of the outer cylinder, and a dissolvable carrier ring arranged between the lower joint and the inner cylinder. An area of the axial upper end surface of the inner cylinder is greater than that of an axial lower end surface thereof, so that the working fluid generates a pressure difference to provide downward pressure for the inner cylinder, which moves downward under the pressure after the carrier ring is dissolved to open the flow guiding hole.