发明授权
US4608182A Vinyl sulfonate amide copolymer and terpolymer combinations for control
of filtration in water-based drilling fluids at high temperature
失效
乙烯基磺酸酰胺共聚物和三元共聚物组合，用于控制高温水基钻井液中的过滤
- 专利标题： Vinyl sulfonate amide copolymer and terpolymer combinations for control of filtration in water-based drilling fluids at high temperature
- 专利标题（中）： 乙烯基磺酸酰胺共聚物和三元共聚物组合，用于控制高温水基钻井液中的过滤
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申请号： US690066申请日： 1985-01-09
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公开(公告)号： US4608182A公开(公告)日： 1986-08-26
- 发明人: Joseph J. Dickert, Jr. , Israel J. Heilweil
- 申请人： Joseph J. Dickert, Jr. , Israel J. Heilweil
- 申请人地址： NY New York
- 专利权人： Mobil Oil Corporation
- 当前专利权人： Mobil Oil Corporation
- 当前专利权人地址： NY New York
- 主分类号： C08F220/58
- IPC分类号： C08F220/58 ; C09K8/22 ; C09K7/02
摘要：
A water-based clay drilling fluid or mud suitable for drilling at temperatures up to 200.degree. C. and pressures up to 100 psig at pH levels from 8 to 11.5, said mud or fluid containing additives which are two separate and distinct water-soluble vinyl sulfonate amide polymers. One polymer consists of a random distribution of units of the formulae ##STR1## The other polymer consists of a random distribution of units of the formula (a) and (b) as described above. In each polymer, R.sub.1 and R.sub.2 are the same or different and each is hydrogen, methyl, or ethyl, and X.sup.+ is a cation.Drilling while using this improved fluid or mud results in a reduced fluid loss rate.
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