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:
Mar. 19, 2019
Filed:
Apr. 13, 2018
Southwest Petroleum University, Chengdu, CN;
Abstract
The present invention relates to the field of drilling fluids, and discloses a drilling fluid that can inhibit surface hydration of clay and a preparation method of the drilling fluid. The drilling fluid contains water, bentonite, an intercalation inhibitor, a tackifier, a flow pattern regulator, a filtrate reducer, a lubricant, and a weighting agent, wherein, based on 100 parts by weight of water, the content of the bentonite is 2-9 parts by weight, the content of the intercalation inhibitor is 0.3-4 parts by weight, the content of the tackifier is 1-10 parts by weight, the content of the flow pattern regulator is 0.8-7 parts by weight, the content of the filtrate reducer is 1-8 parts by weight, the content of the lubricant is 0.5-4 parts by weight, and the content of the weighting agent is 12-60 parts by weight; the intercalation inhibitor prepared in the present invention can effectively control the degree of surface hydration of clay and thereby greatly improve the inhibition performance of the drilling fluid system by virtue of adsorption, intercalation, and ion exchange effects, etc. attained by the adsorptive groups that have specific functions in the intercalation inhibitor, when the intercalation inhibitor is intercalated in a form of a single spread layer between grain layers of clay minerals.