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:
Oct. 05, 2021
Filed:
Apr. 12, 2021
China University of Petroleum (Beijing), Beijing, CN;
Guancheng Jiang, Beijing, CN;
He Shi, Beijing, CN;
Kaixiao Cui, Beijing, CN;
Yinbo He, Beijing, CN;
Lili Yang, Beijing, CN;
Tengfei Dong, Beijing, CN;
Chunyao Peng, Beijing, CN;
Xuwu Luo, Karamay, CN;
Bin Tan, Beijing, CN;
Jun Cai, Beijing, CN;
Xing Liang, Beijing, CN;
Zhiliang You, Beijing, CN;
Yong Wang, Beijing, CN;
CHINA UNIVERSITY OF GEOSCIENCES (BEIJING), Beijing, CN;
Abstract
The present invention relates to the technical field of oil and gas drilling, and discloses a biodiesel-based constant rheological property drilling fluid containing intelligent temperature responsive polymer, which contains two or more of the following components which are stored in admixture or separately: base oil biodiesel, aqueous phase, emulsifier, organic soil, constant rheological property flow pattern modifier, hydrolysis inhibitor, filtrate reducer and weighting material; the constant rheological property flow pattern modifier is an intelligent temperature responsive polymer, and the polymer contains structural units provided by bis-hydroxyethyl bis-hydroxypropyl stearyl ammonium chloride, ethylene bis-stearamide and dimerized fatty acid. The drilling fluid provided by the present invention has excellent environmental protection property and degradability, and has conventional rheological property, weak gel structure and fluid loss property which are equivalent to those of the conventional oil-based drilling fluid, and also has excellent temperature resistance, CaO compatibility and constant rheological property.