Deviated wellbore drilling system and apparatus (US Patent 4828053)

Patent number: 4828053 Granted: 1989-05-09 Filed: 1988-01-12 Inventors: William C. Maurer (Houston, TX, US); William J. McDonald (Houston, TX, US) Assignees: Maurer Engineering, Inc. (Houston, TX, US)

Abstract

A deviated wellbore drilling system suitable for drilling curved wellbores which have a radius of curvature of approximately 200 to 1,000 feet relative to a vertical or near vertical wellbore comprises a drill string, a drill bit, and a fluid-operated drill motor having a curved or bent housing section for