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:
May. 06, 2025
Filed:
Feb. 04, 2021
China Petroleum & Chemical Corporation, Beijing, CN;
Sinopec Oilfield Service Corporation, Beijing, CN;
Sinopec Shengli Petroleum Engineering Co., Ltd, Shandong, CN;
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd., Shandong, CN;
Gongrang Li, Shandong, CN;
Wenbo Li, Beijing, CN;
Bingxiang Sun, Beijing, CN;
Hui Tian, Shandong, CN;
Xizhou Wang, Beijing, CN;
Ke Li, Shandong, CN;
Jianghong Jia, Shandong, CN;
Lei Yu, Shandong, CN;
Jie Sun, Shandong, CN;
Xudong Wang, Shandong, CN;
Chengjun Wang, Shandong, CN;
Bingtai Li, Shandong, CN;
Haibin Li, Shandong, CN;
Zhendong Liu, Shandong, CN;
Kai Gao, Shandong, CN;
Chunguang Li, Dongying Shandong, CN;
Hui Li, Shandong, CN;
CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing, CN;
SINOPEC OILFIELD SERVICE CORPORATION, Beijing, CN;
SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD, Shandong, CN;
DRILLING TECHNOLOGY RESEARCH INSTITUTE OF SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD, Shandong, CN;
Abstract
Disclosed is a coated rubber particle, preparation thereof and its application as a plugging material in drilling fluids. The coated rubber particle comprises a rubber core and a coating layer, wherein the core has a fluorine content (at %) of 0-15%, the coating layer has a fluorine content (at %) of 30-80%, and the coated rubber particle has a 24-hour oil absorption rate of 4% or less. The coated rubber particle has good oil resistance, and is particularly suitable for use as a plugging material in drilling fluids, particularly oil-based drilling fluids.