发明名称 |
DRILLING FLUID COMPOSITIONS COMPRISING DIBLOCK COPOLYMERS |
摘要 |
The invention relates to a selectively hydrogenated isoprene-styrene diblock copolymer having a polystyrene content of at least 40 wt.%, which when added to an oil-based mud composition, substantially reduces fluid loss. The polystyrene in the diblock has a true molecular weight greater than 60 kg/mole and the total apparent molecular weight of the diblock copolymer is at least 160 kg/mole. The drilling mud that contains about 0.5 pounds per barrel to about 10 pounds per barrel of a selectively hydrogenated isoprene-styrene diblock copolymer and a weighting agent, resulting in a drilling fluid composition exhibiting good suspension of the weighting agent and improved fluid loss performance. |
申请公布号 |
WO2015148948(A1) |
申请公布日期 |
2015.10.01 |
申请号 |
WO2015US23036 |
申请日期 |
2015.03.27 |
申请人 |
KRATON POLYMERS U.S. LLC |
发明人 |
MURPHY, ERIN;BENING, ROBERT |
分类号 |
C08L9/06;C08L25/16;C09K8/32 |
主分类号 |
C08L9/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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