These Casing/Oil Well Pipes are a general designation of bushing, oil pipe, drill pipe, rectangle drill pipe, drill collar.
Bushing is a kind of steel pipe to support the wall of oil and gas well. which can be classified as surface layer coated pipe, technical coat pipe and oillayer coated pipe.
Standard:API SPEC 5CT, API SPEC 5B
Application: oil pipe is used for draw off the oil or gas from the oil well.
Bushing is used for supporting the wall of oil and gas well
Steel Grade: J55,K55, L80-1,N80.C90,C95,T95,P110,M65
Dimension: 4 1/2",5",5 1/2",6 5/8",7",7 5/8",8 5/8"
Connection: Non-connection, SC, LC, BTC