Substituted saccharides or glycosides and use thereof in a drilling fluid composition

US11713409B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• SINOPEC PETROLEUM ENGINEERING TECHNOLOGY SERVICE CO., LTD · CN
• Drilling Engineering Technology Research Institute of Sinopec Zhongyuan Petroleum Engineering Co., LTD · CN

Inventors

• Zhonghua Wang · Shijiazhuang, CN
• Xiqiang Si · Baofeng County, CN

Key dates

• Filing date: Jul 5, 2019
• Grant date: Aug 1, 2023
• Expiry date: Sep 9, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/55
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to substituted saccharides or glycosides and their use in drilling fluid compositions. The substituted saccharide or glycoside bears a substituent A, a substituent B and a substituent C, wherein the substituent A comprises in its structure a group the substituent B comprises in its structure a group and the substituent C comprises in its structure a unit —NH—R7—. The definition of each group is described in the description. The drilling fluid composition can show good temperature resistance, filtration loss reducing reduction property, pollution resistance, inhibition property, lubricating property or reservoir protection property, and has no biotoxicity.