Drilling with casing promises major benefits

Bob Tessari, Garret Madell Tesco Drilling Technology Calgary Tommy Warren Tesco Drilling Technology Tulsa A wire line winch is used to run and retrieve the BHA through the casing. It is driven by a high-torque motor attached directly to the winch axle (Fig. 3). This fully hydraulic powered drilling rig with a telescoping mast was utilized for Tesco's first casing drilling tests (Fig. 4). A casing drilling system developed by Tesco Drilling Technology aims to reduce costs, improve drilling efficiency, and minimize hole problems by casing the well as it is drilled. The system has been under development fo...

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