Drilling an oil or gas well is a complex operation. Though similar methods and equipment can be used in many wells, literally each well is different. Consequently, oil and gas well drilling has little in common with typical industrial production-line operations. This overview of the common techniques, equipment, and some of the problems involved in drilling oil and gas wells is designed to familiarize those persons not directly involved in drilling operations with the industry and its capability. It explains some common industry terms and relationships and offers perspective on the tremendous cost of oil and gas well drilling. The book also indicates the diverse skills that must be combined to drill a single well