Kazem Javanmardi, Debbie Gaspard Shell Offshore Inc. New Orleans The use of the soft torque system has significantly reduced torque fluctuations (up to 80%), torsional drillstring vibrations, and bit slip-stick conditions to help reduce drillstring failures and improve penetration rates in deep directional wells. Shell Offshore Inc. (SOI) successfully installed and operated the soft torque rotary system on two rigs drilling in Mobile Bay. The system was instrumental in eliminating expensive ($5-10 million) drillstring failures on Well SL 531 No. 3, a complex directional well in Mobile Bay. The soft torque rotary system atte...

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