OCTG Casing and Tubing

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OCTG Tubing

OCTG Casing

Drilling Pipe

1. OCTG Tubing
N-STEEL supplies all kind of OCTG tubing pipes used for transporting crude oil and natural gas from the hydrocarbon reservoir up to earth’s surface after drilling has been completed.

Specifications of OCTG tubing
Standards: API SPEC 5CT
Steel grade: J55/ L80-1/N80/C90/P110
Outside diameter: 2 3/8"- 4 1/2" (60mm-114.3mm)
Type of end finish: P-flush end; N-non-upset; U-external upset; T&C-lathe thread coupling

2. OCTG Casing
Aside from tubing pipes, N-STEEL also provides casing pipes that are mainly used for the pipes on the wall of a well.

Specifications of OCTG Casing
Standard: API SPEC 5CT
Grade: J55/K55/M65/L80/C95/N80-1/N80Q/C90/T95/P110
Outside diameter: 4 1/2 "- 20" (114.3mm - 508mm)
Type of end finish: P-flush end; N-non-upset; U-external upset; T&C-lathe thread coupling

OD, W.T. and Weight Tolerances of OCTG Casing and Tubing

Item		Tolerances
Outside Diameter	Pipe Body	D ≤ 101.6mm ± 0.79mm
	Pipe Body	D ≥ 114.3mm (-0.5 %D~ 1.0%D)
	Coupling	± 1%D
Wall Thickness		-12.5%
Weight	Single Lengths	6.5%~ -3.5%
Weight	Carload Lots≥18144kg Carload Lots＜18144kg	-1.75% -3.5%

3. Drilling Pipe
Standard: API SPEC 5CT

Specifications of Drilling Pipe

OD		Nominal Weight	Calculated Weight		Grade	Wall Thickness		Upset End, for Weld-on Tool Joints (see Note)
in	mm	Nominal Weight	lb/ft	kg/m	Grade	in	mm	Upset End, for Weld-on Tool Joints (see Note)
2 3/8 "	60.3	6.65	6.26	9.32	E.X.G.S	0.280	7.11	EU
2 7/8 "	73.0	10.40	9.72	14.48	E.X.G.S	0.362	9.19	EU
3 1/2 "	88.9	13.30	12.31	18.34	E.X.G.S	0.368	9.35	EU
3 1/2 "	88.9	15.50	14.63	21.79	E.X.G.S	0.449	11.40	EU
4 "	101.6	14.00	12.93	19.26	E.X.G.S	0.330	8.38	EU
4 1/2 "	114.3	16.60	14.98	22.31	E.X.G.S	0.337	8.56	EU
4 1/2 "	114.3	20.00	18.69	27.84	E.X.G.S	0.430	10.92	EU
5 "	127	19.50	17.93	26.71	E.X.G.S	0.362	9.19	IEU
5 "	127	25.60	24.03	35.79	E.X.G.S	0.500	12.70	IEU
5 1/2 "	139.7	21.90	19.81	29.51	E.X.G.S	0.361	9.17	IEU
5 1/2 "	139.7	24.70	22.54	33.57	E.X.G.S	0.415	10.54	IEU

Size Deviation of Drilling Pipe

Item		Tolerances
Pipe Body	Outside Diameter	D ≤ 101.6mm ± 0.79mm D ≥ 114.3mm (-0.50%D~ 1.00% D)
Pipe Body	Wall Thickness	-12.5%
Weight	Single Lengths	-3.5%~ 6.5%

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