发明名称 |
Variable density drilling mud |
摘要 |
One embodiment of the invention is a variable density drilling mud comprising compressible particulate material in the drilling mud wherein the density of the drilling mud changes in response to pressure changes at depth. A second embodiment is a method for varying drilling mud density. The method comprises estimating the pore pressure and fracture gradient, and choosing a drilling mud with compressible materials wherein the effective mud weight of the drilling mud remains between the pore pressure and the fracture gradient in at least one interval of the well bore. A third embodiment is an apparatus for drilling a wellbore. |
申请公布号 |
GB2431678(A) |
申请公布日期 |
2007.05.02 |
申请号 |
GB20070000811 |
申请日期 |
2005.06.09 |
申请人 |
EXXONMOBIL UPSTREAM RESEARCH COMPANY |
发明人 |
RICHARD S POLIZZOTTI;MEHMET D ERTAS;NORMAN M POKUTYLOWICZ;SCOTT T MILNER;JAMES R RIGBY;JOHN MONTGOMERY;PAVLIN B ENTCHEV;STUART R KELLER;VISHWAS GUPTA;WILLIAM J SISAK |
分类号 |
C09K8/02;C09K8/14;C09K8/16 |
主分类号 |
C09K8/02 |
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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