Description:

1)Casing is the pipe as wall lining surface into the drilling inside by the ground, Between two pipes are connected by coupling.

2)Tubing is used to extracting petroleum and natural gas from a well casing serves as walls of a well.

Specification:

Standard:  API SPEC 5CT PSL1/PSL2, API SPEC Q1, ISO 13679, API RP 5C5.

Outside Diameter:  33.40-508mm (1.315-20inch)

Wall Thickness:  3.18-16.13mm

Unite Length:

1)Casing pipe: R1 (4.88-7.62m); R2 (7.62-10.36m); R3 (10.36-14.63m)

2)Tubing pipe: R1 (6.1-7.32m); R2 (8.53-9.75m); R3 (11.58-12.8m)

Steel Grade:

Group 1: All casing and tubing in  Grades H40,J55,K55,N80-1,N80-Q and R95

Group 2: All casing and tubing in  Grades C90,C110,L80-1,L80-9Cr,L80-13Cr,M65 and T95

Group 3: All casing and tubing in  Grades P110

Group 4: All casing  in  Grades Q125