| 摘要 |
The invention relates to methods and apparatus to place a conductor pipe and a casing in a subsea environment. The method comprises positioning a first casing in a wellbore, providing a drilling assembly having a second casing, a conveying member having a diameter less than the second casing. A tubular adapter for coupling the conveying member to the second casing, wherein the tubular adapter is adapted to transfer torque from the conveying member to the second casing, a drilling member disposed at a lower end of the second casing, lowering the drilling assembly into the first casing and coupling the second casing to the first casing. A later embodiment relates to a method for lining a portion of a wellbore comprising rotating a casing assembly into the wellbore. |
