Rotating control device for drilling wells |
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| 申请号 | EP10171045.7 | 申请日 | 2010-07-28 | 公开(公告)号 | EP2295712A3 | 公开(公告)日 | 2014-08-13 |
| 申请人 | WEATHERFORD LAMB, INC.; | 发明人 | Hoyer, Carel W; Hannegan, Don M.; Bailey, Thomas F.; Jacobs, Melvin T.; White, Nicky; | ||||
| 摘要 | A rotating control apparatus, comprising: an outer member; an inner member having a first sealing element and a second sealing element; said inner member, said first sealing element and said second sealing element rotatable relative to said outer member; a first cavity defined by said inner member, said first sealing element and said second sealing element; and said inner member having a port to said first cavity. Disclosed is also a method for drilling a wellbore in a formation with a fluid, comprising the steps of: casing a portion of the wellbore using a casing having a casing shoe; determining a casing shoe pressure; determining a formation fracture pressure; positioning a rotating control device with said casing; and drilling the wellbore at a fluid pressure calculated using the lesser of the casing shoe pressure and the formation fracture pressure. |
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