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Follow on Google News | Underwater Conductor Pinning SolutionThis new drilling and pinning technology offers real advantages for recovering conductors with integrity or corrosion issues.
Claxton quelled the uncertainty with a proposal to drill and pin the conductor and the various casing strings just above the severance point. This is normal practice at the top of the conductor and provides safe lifting of the conductor and the casings together. By drilling and pinning them at the bottom, the internal casings effectively bear the weight of the conductor. In a normal drilling and pinning operation, (http://www.claxtonengineering.com/ Another question was how the bit could be easily detached from the machine’s drill carriage once it had penetrated the tubulars. This uses a motorised, threaded draw bar that passes through the body of the carriage and screws into the back of the bit. Activating the motor retracts the drilling carriage to leave the bit in place. Screwing the carriage back from the bit also causes sprung gripper pins set in the side of the bit to emerge from behind the conductor wall and lock the bit in place. Jay Miller, the Claxton project bespoke engineer (http://www.claxtonengineering.com/ # # # Claxton, (http://www.claxtonengineering.com/ End
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