发明公开
EP0904478A1 DRILLING APPARATUS 失效
钻探设备

  • 专利标题: DRILLING APPARATUS
  • 专利标题(中): 钻探设备
  • 申请号: EP97926112.0
    申请日: 1997-06-13
  • 公开(公告)号: EP0904478A1
    公开(公告)日: 1999-03-31
  • 发明人: EDDISON, Alan, Martyn
  • 申请人: ANDERGAUGE LIMITED
  • 申请人地址: Badentoy Industrial Park, Badentoy Avenue Aberdeen AB1 4YB GB
  • 专利权人: ANDERGAUGE LIMITED
  • 当前专利权人: ANDERGAUGE LIMITED
  • 当前专利权人地址: Badentoy Industrial Park, Badentoy Avenue Aberdeen AB1 4YB GB
  • 代理机构: Shanks, Andrew, et al
  • 优先权: GB19960012524 19960614
  • 国际公布: WO1997047848 19971218
  • 主分类号: E21B7
  • IPC分类号: E21B7 E21B17
DRILLING APPARATUS
摘要:
Directional drilling apparatus (26) for location on a drill string (20) comprises a stabiliser (32) having a mandrel (38) for connection to the drill string (20) and an eccentric non-rotating element (46) mounted on the mandrel (38) for offsetting the string (20) in the bore (22) and a non-rotating offset mass (34) for maintaining the element (46) at a selected orientation relative to the bore (22) as the drill string (20) rotates.
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