Application of Innovative Strategies and PDC Bit Technology in the Cook Inlet Basin

Abstract

Abstract The paper describes recent advances in techniques for rotary drilling interbedded formations of Alaska's Cook Inlet using PDC drill bits. Until recently, use of PDC drill bits in the Hemlock formations in Cook Inlet was inconsistently successful at best. The advent of new drill bit technology that incorporates natural diamond impregnated cylinders to back up the conventional PDC cutting structure has resulted in consistent, best-in-class performance in these punishing drilling environments, as documented by case histories. In addition, this new PDC bit technology was combined with an innovative dual penetration directional strategy which allowed the operator to maximize exposure to the target Hemlock formations. Developed by the operator in combination with the drilling crew and contractors, the U-shaped dual penetration trajectory has allowed economic commercial development of applications previously not considered PDC-drillable.