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Casing

Category : Oilfiled Tubulars(OCTG)

Pipe type:Casing

Size :

OD: 4 1/2"- 20" (114.3mm-508mm) WT: 0. 205"- 0.635"

Length: R1(4.88mtr-7.62mtr), R2(7.62mtr-10.36mtr), R3(10.36mtr - 14.63mtr)

Connection: LTC, STC, BTC or as customer's requirement.

Standard & Grade:API 5CT, SY/T 6194, BS EN ISO 11960, NF M87-207, JIS G3439, IS:4270, H-40, J55, K-55, N-80, N80Q, C-75, L-80, C-90, T-95, P110, Q-125

Surface:Black Painting, Corrosion proofing water based paint;

Packing:Bundled or bulk , seaworthy packing or for the client's requirement

Usage:Tube for conveying gas, water, and oil in both and natural gas industries etc.

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Description
Specification
Standard
Process
Packing

Casing is used for lining the complete borehole which has been dug into the ground to procure olil Similar to the drill pipe, the oil well casing pipe is also subjected to axial tension, therefore they are required to be made from high-quality strong steel material. OCTG casing is large diameter pipe which are held in place in the borehole using cement.

CASING AND TUBING

API 5CT

Casing:OD 4 1/2"- 20" (114.3mm-508mm) Tubing:OD 2 3/8" - 4 1/2" (60.3mm-114.30mm)

WT: 0. 205"- 0.635"

H-40, J55, K-55, N-80, C-75, L-80, C-90, T-95,P110,Q-125

Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells

SY/T 6194 /

BS EN ISO 11960/

NF M87-207

Casing:OD 4 1/2"- 20" (114.3mm-508mm) Tubing:OD 2 3/8" - 4 1/2" (60.3mm-114.30mm)

WT: 0. 205"- 0.635"

H-40, J55, K-55, N-80,N80Q,C-75, L-80, C-90, T-95,P110,Q-125

API 5CT Well Casing Length:

API 5CT Casing	Range 1	Range 2	Range 3
API 5CT Casing	4.88~7.62	7.62~10.36	10.36~14.63

Dimension

Labels		OD(mm)	WT(mm)	J55/K55	N80	L80	C90/T95	P110	Q125
4 1/2	9.5	114.3	5.21	PS	-	-	-	-	-
	10.5	114.3	5.69	PSB	-	-	-	-	-
	11.6	114.3	6.36	PSLB	PLB	PLB	PLB	PLB	-
	13.5	114.3	7.37	-	PLB	PLB	PLB	PLB	-
	15.1	114.3	8.56	-	-	-	-	PLB	PLB
5	11.5	127	5.59	PS	-	-	-	-	-
	13		6.43	PSLB	-	-	-	-	-
	15		7.52	PSLBE	PLBE	PLBE	PLBE	PLBE	-
	18		9.19	-	PLBE	PLBE	PLBE	PLBE	PLBE
	21.4		11.10	-	PLB	PLB	PLB	PLB	PLB
	23.2		12.14	-	PLB	PLB	PLB	PLB	PLB
	24.1		12.7	-	PLB	PLB	PLB	PLB	PLB
5 1/2	14	139.7	6.20	PS	-	-	-	-	-
	15.5		6.98	PSLBE	-	-	-	-	-
	17		7.72	PSLBE	PLBE	PLBE	PLBE	PLBE	-
	20		9.17	-	PLBE	PLBE	PLBE	PLBE	-
	23		10.54	-	PLBE	PLBE	PLBE	PLBE	PLBE
	26.8		12.7	-	-	-	P	-	-
	29.7		14.27	-	-	-	P	-	-
	32.6		15.88	-	-	-	P	-	-
	35.3		17.45	-	-	-	P	-	-
	38		19.05	-	-	-	P	-	-
	40.5		20.62	-	-	-	P	-	-
	43.1		64.14	-	-	-	P	-	-
6 5/8	20	168.28	7.32	PSLB
	24		8.94	PSLBE	PLBE	PLBE	PLBE	PLBE	-
	28		10.59	-	PLBE	PLBE	PLBE	PLBE	-
	32		12.06	-	PLBE	PLBE	PLBE	PLBE	PLBE
7	20	177.8	6.91	PS
	23		8.05	PSLBE	PLBE	PLBE	PLBE	-	-
	26		9.19	PSLBE	PLBE	PLBE	PLBE	PLBE	-
	29		10.6		PLBE	PLBE	PLBE	PLBE
	32		11.51		PLBE	PLBE	PLBE	PLBE
	35		12.65		PLBE	PLBE	PLBE	PLBE	PLBE
	38		13.72		PLBE	PLBE	PLBE	PLBE	PLBE
7 5/8	26.4	193.67	8.33	PSLBE	PLBE	PLBE	PLBE	-	-
	29.7		9.52	-	PLBE	PLBE	PLBE	PLBE	-
	33.7		10.92	-	PLBE	PLBE	PLBE	PLBE	-
	39		12.7	-	PLBE	PLBE	PLBE	PLBE	PLBE
	42.8		14.27	-	PLB	PLB	PLB	PLB	PLB
	45.3		15.11	-	PLB	PLB	PLB	PLB	PLB
	47.1		15.88	-	PLB	PLB	PLB	PLB	PLB
8 5/8	24	219.08	6.71	PS	-	-	-	-	-
	28		7.72	-	-	-	-	-	-
	32		8.94	PSLBE	-	-	-	-	-
	36		10.16	PSLBE	PLBE	PLBE	PLBE	-	-
	40		11.43	-	PLBE	PLBE	PLBE	PLBE	-
	44		12.70	-	PLBE	PLBE	PLBE	PLBE	-
	49		14.15	-	PLBE	PLBE	PLBE	PLBE	PLBE
9 5/8	36	244.48	8.94	PSLB	-	-	-	-	-
	40		10.03	PSLBE	PLBE	PLBE	PLBE	-	-
	43.5		11.05	-	PLBE	PLBE	PLBE	PLBE
	47		11.99	-	PLBE	PLBE	PLBE	PLBE	PLBE
	53.5		13.84	-	PLBE	PLBE	PLBE	PLBE	PLBE
	58.4		15.11	-	PLB	PLB	PLB	PLB	PLB
10 3/4	40.5	273.05	8.89	PSB	-	-	-	-	-
	45.5		10.16	PSBE	-	-	-	-	-
	51		11.43	PSBE	PSBE	PSBE	PSBE	PSBE	-
	55		12.57	-	PSBE	PSBE	PSBE	PSBE	-
	60.7		13.84	-	-	-	PSBE	PSBE	PSBE
	65.7		15.11	-	-	-	PSB	PSB	PSB
113/4	47	298.45	9.53	PSB	-	-	-	-	-
	54		11.05	PSB	-	-	-	-	-
	60		12.42	PSB	PSB	PSB	PSB	PSB	PSB
13 3/8	48	339.72	8.38	-	-	-	-	-	-
	54.5		9.65	PSB	-	-	-	-	-
	61		10.92	PSB	-	-	-	-
	68		12.19	PSB	PSB	PSB	PSB	PSB	-
	72		13.06	-	PSB	PSB	PSB	PSB	PSB
16	75	406	11.13	PSB	-	-	-	-	-
	84		12.57	PSB	-	-	-	-	-
	109		16.66	P	P	P	-	P	P
20	94	508	11.13	PSLB	-	-	-	-	-
30	96	762	16.13	PSLB	-	-	-	-	-
P-Plain end; S-Short round thread; L-Long round thread; B-Buttress thread; E-Extreme line;

Dimension Tolerances

		Tolerance
Outside Diameter	Pipe Body	D≤101.60mm，±0.79mm
		D≥114.30mm，+1.0%, -0.5%D
	Coupling	±1%D
t Wall Thickness		0, -12.5%t
Weight	Single Lengths	+6.5%,-3.5%
	Carload Lots or Order Quantity	≥18144 kg(40000ib)，0,-1.75%
		＜18144 kg(40000ib)，0,-3.5%

Tensile and Hardness Requirements

steel grade	type	total elongation under load (%)	yield strength (Mpa)		tensile strength (Mpa) min	hardness max
steel grade	type	total elongation under load (%)	min	max	HRC	HBW
H40	-	0.5	276	552	414	-	-
J55	-	0.5	379	552	517	-	-
K55	-	0.5	379	552	655	-	-
N80	1	0.5	552	758	689	-	-
N80	Q	0.5	552	758	689	-	-
M65	-	0.5	448	586	586	22	235
L80	1	0.5	552	655	655	23	241
L80	9 Cr	0.5	552	655	655	23	241
L80	13 Cr	0.5	552	655	655	23	241
C90	1	0.5	621	724	689	25.4	255
P110	-	0.6	758	965	862	-	-

API 5CT Well Casing Length:

API 5CT Casing	Range 1	Range 2	Range 3
API 5CT Casing	4.88~7.62	7.62~10.36	10.36~14.63

Dimension

Labels		OD(mm)	WT(mm)	J55/K55	N80	L80	C90/T95	P110	Q125
4 1/2	9.5	114.3	5.21	PS	-	-	-	-	-
	10.5	114.3	5.69	PSB	-	-	-	-	-
	11.6	114.3	6.36	PSLB	PLB	PLB	PLB	PLB	-
	13.5	114.3	7.37	-	PLB	PLB	PLB	PLB	-
	15.1	114.3	8.56	-	-	-	-	PLB	PLB
5	11.5	127	5.59	PS	-	-	-	-	-
	13		6.43	PSLB	-	-	-	-	-
	15		7.52	PSLBE	PLBE	PLBE	PLBE	PLBE	-
	18		9.19	-	PLBE	PLBE	PLBE	PLBE	PLBE
	21.4		11.10	-	PLB	PLB	PLB	PLB	PLB
	23.2		12.14	-	PLB	PLB	PLB	PLB	PLB
	24.1		12.7	-	PLB	PLB	PLB	PLB	PLB
5 1/2	14	139.7	6.20	PS	-	-	-	-	-
	15.5		6.98	PSLBE	-	-	-	-	-
	17		7.72	PSLBE	PLBE	PLBE	PLBE	PLBE	-
	20		9.17	-	PLBE	PLBE	PLBE	PLBE	-
	23		10.54	-	PLBE	PLBE	PLBE	PLBE	PLBE
	26.8		12.7	-	-	-	P	-	-
	29.7		14.27	-	-	-	P	-	-
	32.6		15.88	-	-	-	P	-	-
	35.3		17.45	-	-	-	P	-	-
	38		19.05	-	-	-	P	-	-
	40.5		20.62	-	-	-	P	-	-
	43.1		64.14	-	-	-	P	-	-
6 5/8	20	168.28	7.32	PSLB
	24		8.94	PSLBE	PLBE	PLBE	PLBE	PLBE	-
	28		10.59	-	PLBE	PLBE	PLBE	PLBE	-
	32		12.06	-	PLBE	PLBE	PLBE	PLBE	PLBE
7	20	177.8	6.91	PS
	23		8.05	PSLBE	PLBE	PLBE	PLBE	-	-
	26		9.19	PSLBE	PLBE	PLBE	PLBE	PLBE	-
	29		10.6		PLBE	PLBE	PLBE	PLBE
	32		11.51		PLBE	PLBE	PLBE	PLBE
	35		12.65		PLBE	PLBE	PLBE	PLBE	PLBE
	38		13.72		PLBE	PLBE	PLBE	PLBE	PLBE
7 5/8	26.4	193.67	8.33	PSLBE	PLBE	PLBE	PLBE	-	-
	29.7		9.52	-	PLBE	PLBE	PLBE	PLBE	-
	33.7		10.92	-	PLBE	PLBE	PLBE	PLBE	-
	39		12.7	-	PLBE	PLBE	PLBE	PLBE	PLBE
	42.8		14.27	-	PLB	PLB	PLB	PLB	PLB
	45.3		15.11	-	PLB	PLB	PLB	PLB	PLB
	47.1		15.88	-	PLB	PLB	PLB	PLB	PLB
8 5/8	24	219.08	6.71	PS	-	-	-	-	-
	28		7.72	-	-	-	-	-	-
	32		8.94	PSLBE	-	-	-	-	-
	36		10.16	PSLBE	PLBE	PLBE	PLBE	-	-
	40		11.43	-	PLBE	PLBE	PLBE	PLBE	-
	44		12.70	-	PLBE	PLBE	PLBE	PLBE	-
	49		14.15	-	PLBE	PLBE	PLBE	PLBE	PLBE
9 5/8	36	244.48	8.94	PSLB	-	-	-	-	-
	40		10.03	PSLBE	PLBE	PLBE	PLBE	-	-
	43.5		11.05	-	PLBE	PLBE	PLBE	PLBE
	47		11.99	-	PLBE	PLBE	PLBE	PLBE	PLBE
	53.5		13.84	-	PLBE	PLBE	PLBE	PLBE	PLBE
	58.4		15.11	-	PLB	PLB	PLB	PLB	PLB
10 3/4	40.5	273.05	8.89	PSB	-	-	-	-	-
	45.5		10.16	PSBE	-	-	-	-	-
	51		11.43	PSBE	PSBE	PSBE	PSBE	PSBE	-
	55		12.57	-	PSBE	PSBE	PSBE	PSBE	-
	60.7		13.84	-	-	-	PSBE	PSBE	PSBE
	65.7		15.11	-	-	-	PSB	PSB	PSB
113/4	47	298.45	9.53	PSB	-	-	-	-	-
	54		11.05	PSB	-	-	-	-	-
	60		12.42	PSB	PSB	PSB	PSB	PSB	PSB
13 3/8	48	339.72	8.38	-	-	-	-	-	-
	54.5		9.65	PSB	-	-	-	-	-
	61		10.92	PSB	-	-	-	-
	68		12.19	PSB	PSB	PSB	PSB	PSB	-
	72		13.06	-	PSB	PSB	PSB	PSB	PSB
16	75	406	11.13	PSB	-	-	-	-	-
	84		12.57	PSB	-	-	-	-	-
	109		16.66	P	P	P	-	P	P
20	94	508	11.13	PSLB	-	-	-	-	-
30	96	762	16.13	PSLB	-	-	-	-	-
P-Plain end; S-Short round thread; L-Long round thread; B-Buttress thread; E-Extreme line;

Dimension Tolerances

		Tolerance
Outside Diameter	Pipe Body	D≤101.60mm，±0.79mm
		D≥114.30mm，+1.0%, -0.5%D
	Coupling	±1%D
t Wall Thickness		0, -12.5%t
Weight	Single Lengths	+6.5%,-3.5%
	Carload Lots or Order Quantity	≥18144 kg(40000ib)，0,-1.75%
		＜18144 kg(40000ib)，0,-3.5%

Tensile and Hardness Requirements

steel grade	type	total elongation under load (%)	yield strength (Mpa)		tensile strength (Mpa) min	hardness max
steel grade	type	total elongation under load (%)	min	max	HRC	HBW
H40	-	0.5	276	552	414	-	-
J55	-	0.5	379	552	517	-	-
K55	-	0.5	379	552	655	-	-
N80	1	0.5	552	758	689	-	-
N80	Q	0.5	552	758	689	-	-
M65	-	0.5	448	586	586	22	235
L80	1	0.5	552	655	655	23	241
L80	9 Cr	0.5	552	655	655	23	241
L80	13 Cr	0.5	552	655	655	23	241
C90	1	0.5	621	724	689	25.4	255
P110	-	0.6	758	965	862	-	-

API Spec 5CT – Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells

Chemical Composition, Mass Fraction(%)

steel grade	type	C		Mn		Mo		Cr		Ni Max	Cu Max	P Max	S Max	Si Max
steel grade	type	Min	Max	Min	Max	Min	Max		Max					Si Max
H40	-	-	-	-	-	-	-	-	-	-	-	0.030	0.030	-
J55	-	-	-	-	-	-	-	-	-	-	-	0.030	0.030	-
K55	-	-	-	-	-	-	-	-	-	-	-	0.030	0.030	-
N80	1	-	-	-	-	-	-	-	-	-	-	0.030	0.030	-
N80	Q	-	-	-	-	-	-	-	-	-	-	0.030	0.030	-
M65	-	-	-	-	-	-	-	-	-	-	-	0.030	0.030	-
L80	1	-	0.43	-	1.90	-	-	-	-	0.25	0.35	0.030	0.030	0.45
L80	9 Cr	-	0.15	0.30	0.60	0.90	1.10	8.00	10.0	0.50	0.25	0.020	0.010	1.00
L80	13 Cr	0.15	0.22	0.25	1.00	-	-	12.0	14.0	0.50	0.25	0.020	0.010	1.00
C90	1	-	0.35	-	1.20	0.25	0.85	-	1.50	0.99	-	0.020	0.010	-
P110	-	-	-	-	-	-	-	-	-	-	-	0.030	0.030	-
Q125	1	-	0.35	-	1.35	-	0.85	-	1.50	0.99	-	0.020	0.010	-

Note： If the wall thickness is less than 17.78mm, the molybdenum content of the C90-1 steel grade has no lower limit.

Mechanical properties of casing pipe

Grade	Type	Total elongation under load (%)	Yield strength (min)	Yield strength (max)	Tensile strength min Mpa	Hardness Max (HRC)	Hardness Max(HBW)
J55	-	0.5	379	552	517	-	-
K55	-	0.5	379	552	655	-	-
N80	1	0.5	552	758	689	-	-
N80	Q	0.5	552	758	689	-	-
L80	1	0.5	552	655	655	23	241
L80	9Cr	0.5	552	655	655	23	241
L80	13Cr	0.5	552	655	655	23	241
C90	-	0.5	621	724	689	25.4	255
C95	-	0.5	655	758	724	-	-
T95	-	0.5	655	758	724	25.4	255
P110	-	0.6	758	965	862	-	-
Q125	All	0.65	862	1034	931	-	-

Round Pipe → pipe inspection → NDT inspection MPI → End Threading → Thread Inspection → Coupling Threading lnspection → NDT inspection MPI ( coupling) → Phosphating (for coupling) → Coupling power Make up → Hydrostatic test → Drift test → Doping and Protectors Application → Coating → Measurement of Length and Weight → Colour Identification → Marking → Packing → Warehousing

Bundled package

Wooden box package

Energy Steel Industrial

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Phone : 86-731-84625800
Email : info@steel-industrial.com

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