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. 09, 2024
Filed:
Feb. 01, 2021
China Petroleum & Chemical Corporation, Beijing, CN;
Sinopec Petroleum Engineering Technology Research Institute Co., Ltd., Beijing, CN;
Jinli Qin, Beijing, CN;
Yang Liu, Beijing, CN;
Wujun Chen, Beijing, CN;
Ben Liu, Beijing, CN;
Zhaohui Guo, Beijing, CN;
Yanjun Zeng, Beijing, CN;
Ming Liu, Beijing, CN;
Dekai Yang, Beijing, CN;
Yujie Zhu, Beijing, CN;
Hongqian Liao, Beijing, CN;
China Petroleum & Chemical Corporation, Beijing, CN;
Sinopec Petroleum Engineering Technology Research Institute Co., Ltd., Beijing, CN;
Abstract
A staged cementing device includes a cylindrical body having an inner chamber. A circulating opening and a liquid inlet recess open to the inner chamber are arranged on a wall of the body. An opening assembly is arranged in the body, which has an opening sleeve and an opening seat located in the opening sleeve. Initially the opening sleeve is connected with the body through a first shear pin and covers the circulating opening, and the opening seat is connected with the opening sleeve through a second shear pin and covers the liquid inlet recess. A packer includes a packing valve body and a packer rubber. The packing valve body includes a flow channel in communication with the liquid inlet recess, and the packer rubber includes a liquid reservoir in communication with the flow channel. The second shear pin is sheared off in response to primary cementing procedure.