发明名称 |
Method of drilling a stable borehole |
摘要 |
A method of drilling a stable borehole in a formation containing a stress field having a direction of maximal stress, whereby the borehole is drilled with an elongated non-circular cross sectional contour along an axis of elongation and whereby a directional component of the axis of elongation is kept oriented substantially parallel to the direction of maximal stress. |
申请公布号 |
GB2440084(A) |
申请公布日期 |
2008.01.16 |
申请号 |
GB20070021751 |
申请日期 |
2007.11.06 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
MICHAEL ANTHONY ADDIS;MOHAMAD F KHODAVERDIAN |
分类号 |
E21B7/00;E21B7/18;E21B43/00;E21B49/00 |
主分类号 |
E21B7/00 |
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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