发明名称 |
METHOD OF DRILLING A BORE HOLE |
摘要 |
A method is disclosed for drilling a borehole through a production zone underlying an overburden of various earth formations. The method includes drilling the borehole through the overburden with at least one drill bit adapted to optimize at least one drilling performance parameter, and then drilling the borehole through at least part of the production zone with at least one drill bit adapted to optimize at least one production performance parameter.
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申请公布号 |
CA2396291(A1) |
申请公布日期 |
2003.02.01 |
申请号 |
CA20022396291 |
申请日期 |
2002.07.31 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
ROCK, DOUGLAS LAWRENCE |
分类号 |
E21B43/30;E21B44/00;(IPC1-7):E21B7/00;E21B7/08 |
主分类号 |
E21B43/30 |
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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