发明名称 |
Core bit having features for controlling flow split |
摘要 |
A core bit for cutting core samples in subterranean formations. The core bit has interior geometric features configured to control the quantity of drilling fluid, or flow split, flowing into a narrow annulus defined by an inside diameter of the core bit and an outside diameter of a core shoe. Reducing the flow split minimizes fluid invasion of a core being cut; thus, the core bit provides increased core quality and recoverability. The core bit is also adaptable for use with conventional core barrel assemblies and conventional coring techniques.
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申请公布号 |
US7055626(B2) |
申请公布日期 |
2006.06.06 |
申请号 |
US20020099873 |
申请日期 |
2002.03.15 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
WELLS MICHAEL R.;PUYMBROECK LUC VAN;STIBBE HOLGER |
分类号 |
E21B49/02;E21B10/02;E21B10/48;E21B10/61 |
主分类号 |
E21B49/02 |
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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