发明公开
- 专利标题： SUBSTITUTED CELLULOSE ACETATES AND USES THEREOF
- 专利标题（中）： 取代纤维素及其用途
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申请号： EP13741471.0申请日： 2013-01-23
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公开(公告)号： EP2838971A1公开(公告)日： 2015-02-25
- 发明人: COMBS, Michael, T. , GARRETT, Thomas, S.
- 申请人： Celanese Acetate LLC
- 申请人地址： 222 West Las Colinas Blvd. Suite 900n Irving, TX 75039 US
- 专利权人： Celanese Acetate LLC
- 当前专利权人： Celanese Acetate LLC
- 当前专利权人地址： 222 West Las Colinas Blvd. Suite 900n Irving, TX 75039 US
- 代理机构： Hupfer, Bernd
- 优先权： US201213359568 20120127
- 国际公布： WO2013112495 20130801
- 主分类号： C09K8/10
- IPC分类号： C09K8/10 ; C09K8/588 ; E21B43/22
摘要：
The present invention relates to substituted cellulose acetates and methods of use thereof. One embodiment of the present invention provides a drilling fluid having a base fluid and a viscosifier having a substituted cellulose acetate having a polar substituent that comprises an oxygen atom covalently bonded to a nonmetal selected from the group of sulfur, phosphorus, boron, and chlorine; where the nonmetal is present in at least about 0.01% by weight of the substituted cellulose acetate.
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