Penetration rates optimized by aligning torque and rotary speed

Troy Whittington Unocal USA Lafayette, La. Arno Op De Weegh Noble Engineering & Development Ltd. Houston Noble Drilling Corp.'s Tom Jobe, on location for Spirit 76 (a business unit of Unocal Corp.) in Mobile Bay, used a unique method for optimizing penetration rates and reducing drillstring failures by balancing rotary speed and torque parameters. Photo by Arno Op De Weegh The relationship between rotary speed and drilling torque can be used to optimize penetration rates while reducing drillstring failures. An in-house software program, used to graph drilling data on a second-by-second basis, can recognize conflicts or disharmonies b...

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