Request Rejected Specializing in drilling, completion, workover, concentric consulting, project management, and production operations, Stokes & Spiehler has a long history of working with both large and small operato Specializing in drilling, completion, workover, concentric consulting, project management, and production operations, Stokes & Spiehler has a long history of working with both large and small operators in many of the major oil and gas producing regions.