发明名称 |
Drill bit stabilizer |
摘要 |
<p>A stabilizer for a drill sting and drill bit is mounted behind the drill bit in the drilling assembly. The stabilizer comprises a tubular body having one or more stabilizer blades mounted thereon. The stabilizer blades extend radially outwardly from the stabilizer body. In a first position, the stabilizer blades are in vertical axial alignment behind the drill bit. Drill string pressure is utilized to release a locking mechanism permitting relative rotation between the stabilizer blades and the stabilizer body thereby rotating the stabilizer blades to a second position providing stabilization for the drill string and drill bit.</p> |
申请公布号 |
GB2378201(A) |
申请公布日期 |
2003.02.05 |
申请号 |
GB20020022519 |
申请日期 |
2001.03.19 |
申请人 |
* ROTARY DRILLING TECHNOLOGY LLC |
发明人 |
PETER R * HARVEY;MICHAEL J * WOODS;STEVEN J * KRASE |
分类号 |
E21B17/10;E21B23/04;E21B47/01;(IPC1-7):E21B17/10 |
主分类号 |
E21B17/10 |
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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