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:
Jul. 02, 2019
Filed:
Jan. 18, 2018
China University of Petroleum (Beijing), Beijing, CN;
Guancheng Jiang, Beijing, CN;
Deli Gao, Beijing, CN;
Guangchang Ma, Beijing, CN;
Jinsheng Sun, Beijing, CN;
Xi Wang, Beijing, CN;
Xiaolin Pu, Beijing, CN;
Xianzhu Wu, Beijing, CN;
Xiaoxiao Ni, Beijing, CN;
Xianmin Zhang, Beijing, CN;
Le Wang, Beijing, CN;
Yinbo He, Beijing, CN;
Fan Liu, Beijing, CN;
Lili Yang, Beijing, CN;
Tengfei Dong, Beijing, CN;
Abstract
The present invention relates to the well drilling field in petrochemical industry, in particular to use of dual-cation fluorocarbon surfactant as amphiphobic wettability reversal agent in drilling fluid. The dual-cation fluorocarbon surfactant is a dual-cation fluorocarbon surfactant of which the cation part is represented by the following formula (1). The dual-cation fluorocarbon surfactant of the present invention can serve as wettability reversal agent when it is used for oil-gas drilling to enable rock amphiphobic, and is an amphiphobic wettability reversal agent which can cause rock surface to be non-hydrophilic and non-lipophilic. Using of dual-cation fluorocarbon surfactant, especially when drilling highly hydrous mud shale, can avoid permeation of water and oil into the rock effectively and thereby a capillary phenomenon can be prevented, and an effect of stabilizing the well wall and protecting the reservoir is attained.