发明授权
- 专利标题： Device for guiding a drilling string during underwater drilling
- 专利标题（中）： 用于在水下钻井期间引导钻杆的装置
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申请号： US590100申请日： 1975-06-25
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公开(公告)号： US4053022A公开(公告)日： 1977-10-11
- 发明人: Georges Mercier
- 申请人： Georges Mercier
- 申请人地址： FR Paris
- 专利权人： Entreprise de Recherches et d'Activites Petrolieres (E.R.A.P.)
- 当前专利权人： Entreprise de Recherches et d'Activites Petrolieres (E.R.A.P.)
- 当前专利权人地址： FR Paris
- 优先权： FR74.22257 19740626
- 主分类号： E21B7/128
- IPC分类号： E21B7/128 ; E21B19/00 ; E21B7/12
摘要：
Device for guiding a drilling string from a floating drilling rig comprises a flexible guide tube having an inner diameter which is constant and an outer diameter which decreases progressively from its median zone toward each end, the median zone being connected by swivel means to lateral and longitudinal members connected to the floating drilling rig.This device is especially adapted for floating drilling rigs having a well through which the string descends.
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