--Oil drill pipe of API 5DP --API standerd (alloy steel E.X.G.S) --OD :2-3/8,2-7/8,3-1/2,4,4-1/2,5(inch) --Upset:IU,EU,IEU Drill joints play a connecting role in oil and gas drilling and geological work, it is one of the main tools to connect the upper and lower part of the drill hole. Drill pipe joint specifications: ø68, 78,105,121 Produces drill pipe joints with different specifications. Can ...