Patent ID: 8579049
Filing Date: 2013-11-12
Classification: E21B

Abstract:
1. An assembly operable for use in drilling a seven and seven-eighths to eight inch borehole at depths greater than 7000 feet, said assembly comprising: a drill pipe tubular, said drill pipe tubular comprising a tube with a tubular outer diameter; a pin connector and a box connector positioned on opposite ends of said tube, said pin connector comprising a threaded pin and said box connector comprising a threaded box; said pin connector comprising an upset portion which comprises an upset outer diameter equal to or greater than six and one-quarter inches and less than or equal to six and three-quarter inches, said upset portion comprising an inner diameter of at least four and three-eighths inches, and wherein said threaded pin connection comprises a taper per foot of between one inch per foot and one and one-half inches per foot.