Casing, tubing and drill pipe are necessary during the drilling and producing process in the oilfield. Specifications Of Tubing And Casing(Including Couplings):No ... .30.1904.83NUE,EUEJ55,N80,L80,P110,N80Q,L80-1Seamless22 7/873.00.2175.51NUE,EUEJ55,N80,L80,P110,N80Q,L80 ... ,L80-1Seamless170.41510.54LTC,BTCN80,L80,P110,N80Q,L80-1Seamless Casing pipe, tubing pipe and drill ...