| 摘要 |
Methods of drilling open hole and apparatus for achieving same are described. One apparatus comprises a pressure control component strategically positionable in or above a wellbore to isolate downhole pressure while drilling open hole, the pressure control component comprising a rotational drive member effective to rotate a tubular member while drilling open hole. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims.
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