A special grade of extra strong steel pipe threaded on both ends that comes in lengths of about 30 feet and diameters from about 6½ to 2½ inches.
Steel pipe, in approximately 30-foot (9-meter) lengths, screwed together to form a continuous pipe extending from the drilling rig to the drilling bit at the bottom of the hole. Rotation of the drill pipe and bit causes the bit to bore through the rock.
Pipe, usually of 3.5 in. to 5 in. outside diameter, which is supplied in "joints" normally of around 33 ft./10m. in length, each being fitted with thicker, or "up-set" reinforced threaded couplings at each end, "male and female" or "pin and box" respectively. To save time, drill pipe in use but not in the well is stacked in stands.
n: the heavy seamless tubing used to rotate the bit and circulate the drilling fluid. Joints of pipe are generally approximately 30 feet long are coupled together by means of tool joints.
steel pipe screwed together and used to carry and rotate the drilling tools in a well and to permit the circulation of drilling fluid.
Heavy, thick-walled, seamless steel pipe used in rotary drilling to turn the drill bit and to provide a conduit for the drilling mud. Joints of drill pipe are about 30 feet long.
