DRILLING SYSTEMS AND METHODS UTILIZING INDEPENDENTLY DEPLOYABLE MULTIPLE TUBULAR STRINGS

摘要

A novel well bore drilling system and method utilizes independently deployable multiple tubular strings to drill, line and cement multiple hole sections without intervening trips to the surface. In one embodiment, the drilling system includes two or more independent, telescoping, tubular members that form a nested tubular assembly and one or more sensors disposed on the nested tubular assembly. The nested tubular string (10) is deployed in the wellbore in conjunction with a Bottom Hole Assembly (BHA) (100) . In some embodiments, a drilling motor (1020, 1120, 1220) for rotating a drill bit is also positioned in the tubular assembly. The sensors can be disposed in a stator of the drilling motor or adjacent the motor. Also, in embodiments, the sensors (1130) can be positioned on extensible members (1140) that can position the sensor or sensors adjacent the wellbore wall (1154) .