发明名称 |
Flow pulsing apparatus for use in drill string |
摘要 |
A simple and economical device is placed in a drill string to provide a pulsating flow of the pressurized drilling fluid to the jets of the drill bit to enhance chip removal and provide a vibrating action in the drill bit itself thereby to provide a more efficient and effective drilling operation.
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申请公布号 |
US4819745(A) |
申请公布日期 |
1989.04.11 |
申请号 |
US19870008963 |
申请日期 |
1987.01.30 |
申请人 |
INTECH OIL TOOLS LTD |
发明人 |
WALTER, BRUNO H. |
分类号 |
E21B10/60;E21B7/18;E21B7/24;E21B21/00;(IPC1-7):E21B4/02 |
主分类号 |
E21B10/60 |
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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