TWA Article Drilling Optimization: The Essential Role of Drill Bit Selection

Winston Kosasih

SPE.org 

Drilling procedures, drilling fluids program, cementing program, drilling hazards—These are some of the most common considerations for a drilling engineer when designing a drilling program. As boreholes have gotten deeper and lithologies harder and more complex, however, controlling the costs of these operations has become increasingly challenging. The often-sidelined drilling optimization process plays a vital role in helping companies minimize the cost of complex operations and mitigating certain risks that cannot be overlooked. At its core, drilling optimization is about drilling in the most efficient way possible; to meet all drilling objectives while minimizing overall drilling costs. With rig rates running upwards of a million dollars a day for some operations, shaving even a few minutes off the drilling time can result in tens of thousands of dollars in savings.