This paper describes case histories of wells drilled primarily in two fields in Southern Oklahoma, Southwest Davis and Cottonwood Creek, which are located in an area of known deviation problems. Past operations in this "crooked hole country" have employed conventional means of drilling these problem wells, including running relatively light weights and stiff, packed hole assemblies. Ordinarily, conventional directional tools are used to direct the hole to a specified location.

In an attempt to control deviation problems and increase penetration rates, a steerable system was incorporated into the drilling program for the 8-3/4″ hole size, at depths that ranged from 2000 to more than 8000 feet. While directional tools were used to direct the hole to a specified location, use of the steerable system resulted in a drastic reduction in the number of days required to drill the interval.

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