Invention Grant
US08276689B2 Methods and apparatus for drilling with casing 有权
套管钻孔方法及装置

Methods and apparatus for drilling with casing
Abstract:
In one embodiment, a method of forming a wellbore includes running a liner drilling assembly into the wellbore, the liner drilling assembly having a liner, a conveying member, one or more connection members, and a drilling member. The method includes temporarily suspending the liner at a location below the rig floor; releasing the conveying member and the drilling member from the liner; re-connecting the conveying member to the liner; releasing the liner from its location of temporary suspension; and advancing the liner drilling assembly.
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