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:
Apr. 10, 2018
Filed:
Dec. 24, 2014
Sinopec Oilfield Service Corporation, Beijing, CN;
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd, Dongying, CN;
Gongrang Li, Dongying, CN;
Qiang Lan, Dongying, CN;
Peng Zhang, Dongying, CN;
Chengsheng Zheng, Dongying, CN;
Yunbo Xu, Dongying, CN;
Xueqin Wu, Dongying, CN;
Zuohui Li, Dongying, CN;
Yanjun Zhou, Dongying, CN;
Hong Zhang, Dongying, CN;
Sinopec Oilfield Service Corporation, Beijing, CN;
Drilling Technology Research Institute of Sinopec, Dongying, CN;
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.