Comb polymer, method of preparing the same, and use thereof

US9938445B2 · kind B2 · utility

Assignees

• SINOPEC OILFIELD SERVICE CORPORATION · CN
• Drilling Technology Research Institute of Sinopec · CN

Inventors

• Gongrang Li · Shandong, CN
• Qiang Lan · Diemelstraße, US
• Peng Zhang · Nanhu, CN
• Chengsheng Zheng · Dongying, CN
• Yunbo Xu · Dongying, CN
• Xueqin Wu · Dongying, CN
• Zuohui Li · Dongying, CN
• Yanjun Zhou · Dongying, CN
• Hong Zhang · Schwieberdingen, DE

Key dates

• Filing date: Dec 24, 2014
• Grant date: Apr 10, 2018
• Expiry date: Feb 2, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K8/5083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present disclosure discloses a comb polymer or a salt thereof, wherein the structural formula of the comb polymer containing the following constitutional units.When the comb polymer provided in the present disclosure is used in a water-based drilling fluid as a filtration control agent, it can eliminate the defects of conventional filtration control agents which would be subject to ineffectiveness under high temperature and high salinity conditions. The comb polymer has high temperature and salt resistance, and can be produced through simple processes at comparatively low costs. When the comb polymer provided by the present disclosure is used as a filtration control agent, even being added into the drilling fluid at a comparatively low amount, it can still present rather good effects in lowering the amount of filter loss.