Drill pipe, is hollow, thin-walled, steel or aluminium alloy piping that is used on drilling rigs. It is hollow to allow drilling fluid to be pumped down the hole through the bit and back up the annulus. It comes in a variety of sizes, strengths, and wall thicknesses, but is typically 27 to 32 feet in length (Range 2). Longer lengths, up to 45 feet, exist (Range 3).
Drill pipe is used to transmit power by rotary motion from ground level to a drilling bit at the bottom of the hole and to convey flushing media to the cutting face of the tool. Thus it plays a vital part in the successful drilling of oil and gas wells.
Standard:API 5DP,API SPEC 7-1
API 5DP Grade DZ50,E75,R780,X95XG105,S135
OD Range in mm:603.mm,73mm,88.9mm,101.6mm,114.3mm,127,139.7mm
Range of Thickness:6.5mm to 12.7mm,or cutomized
Connection threads:NC26,NC31,NC38,NC46,NC50,5 1/2FH,6 5/8FH