| 发明名称 |
DRILLING FLUID AND METHOD FOR DRILLING IN COAL-CONTAINING FORMATIONS |
| 摘要 |
A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 0.05% calcium sulfate; circulating the drilling fluid through the well; and drilling into a coal seam.
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| 申请公布号 |
US2013206479(A1) |
申请公布日期 |
2013.08.15 |
| 申请号 |
US201113817635 |
申请日期 |
2011.08.26 |
| 申请人 |
SMITH CARL KEITH;TECH-STAR FLUID SYSTEMS INC. |
发明人 |
SMITH CARL KEITH |
| 分类号 |
C09K8/16;E21B21/00 |
主分类号 |
C09K8/16 |
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