Abstract A "J"-shaped directional well was successfully drilled in record time without problems to total depth (TD) in the Cusiana Field in Colombia. The drilling conditions in this field have historically proven to be very difficult because the basin is heavily faulted and tectonically stressed. Previous wells in the area have encountered major drilling problems that have been primarily related to wellbore stability and directional drilling. The Buenos Aires Well B-6 was drilled using only rotary bottomhole assemblies (BHA); no motor runs were planned or were made. Significant improvements in directional drilling practices were made as. a result of careful planning, close teamwork, and careful execution. The paper describes the keys to success in planning and drilling this 3500-ft step out well in a heavily faulted and tectonically active basin.