API 5CT well casing steel pipes, J55 K55 N80 L80 oil casing pipes

ASTM A53 ERW Pipes, GR.B, OD 660mm STD oil line pipes

December 12, 2016

API 5L carbon steel pipes, X60, SCH30,RDL line pipe

December 14, 2016

API 5CT well casing steel pipes, J55 K55 N80 L80 oil casing pipes

api 5ct casing and tubing

API 5ct Tubing: Tubings are used as pipe to transport crude oil or natural gas from layer of the oil to surface, can bear better pressure during oil or gas production, and have smaller diameters.

API 5ct Well Casing pipe: Casings are used for fixing the well wall or down hole, which have wide diameters, can be divided into conductor casings, technical casings and Oil casings.

dimensions of API 5CT casing

1. Steel grade：J55, K55, L80, N80, P110
2. outside diameters:4 1/2″, 5″, 5 1/2″, 6 5/8″, 7″, 7 5/8″, 9 5/8″, 10 3/4″, 13 3/8″, 16″, 18 5/8″, 20″
3. Wall thickness:5.21 – 16.13 mm
4. Thread type: SC( Short round string), LC( Long round thread), BC( Buttress string).
5. Length：R1( 4.88-7.62 m), R2( 7.62-10.36 m), R3( 10.36-14.63 m).

API 5CT K55 CASING PIPE

The API J55 casing and tubing have wide applications used in the shallow wells, geothermal wells, and water wells in the oil and natural gas fields. WLD steel is a leading API 5CT casing and tubing manufacturer and supplier, we provide not only a broad range of API 5CT K55 oilfield casing and API 5CT K55 tubing but also casing coupling, perforated pipe and more.

API 5CT K55 Chemical Composition

Grade	C≤	Si≤	Mn≤	P≤	S≤	Cr≤	Ni≤	Cu≤	Mo≤	V≤
API 5CT K55	0.34-0.39	0.20-0.35	1.25-1.50	0.020	0.015	0.15	0.20	0.20	/	/

API 5CT K55 Mechanical Property

Steel Grade	Yield Strength (Mpa)	Tensile Strength (Mpa)	Total elongation under load %
API 5CT K55	379-552	≥655	0.5

API 5CT K55 Tolerance

Item		Allowable tolerance
Outer diameter	Pipe body	D≤101.60mm±0.79mm
		D≥114.30mm+1.0%
		-0.5%

API 5CT K55 Size Chart

Outer Diameter		Wall Thickness	Weight	Grade	Threaded	Length
in	mm	kg/m	lb/ft	Grade	Threaded	Length
4 1/2″	114.3	14.14-22.47	9.50-11.50	K55	LTC/STC/BTC	R1/R2/R3
5″	127	17.11-35.86	11.50-24.10	K55	LTC/STC/BTC	R1/R2/R3
5 1/2″	139.7	20.83-34.23	14.00-23.00	K55	LTC/STC/BTC	R1/R2/R3
6 5/8″	168.28	29.76-35.72	20.00-24.00	K55	LTC/STC/BTC	R1/R2/R3
7″	177.8	25.30-56.55	17.00-38.00	K55	LTC/STC/BTC	R1/R2/R3
7 5/8″	193.68	35.72-63.69	24.00-42.80	K55	LTC/STC/BTC	R1/R2/R3
8 5/8″	219.08	35.72-72.92	24.00-49.00	K55	LTC/STC/BTC	R1/R2/R3
9 5/8″	244.48	48.07-86.91	32.30-58.40	K55	LTC/STC/BTC	R1/R2/R3
10 3/4″	273.05	48.73-97.77	32.75-65.70	K55	LTC/STC/BTC	R1/R2/R3
11 3/4″	298.45	62.50-89.29	42.00-60.00	K55	LTC/STC/BTC	R1/R2/R3
13 3/8″	339.72	71.43-107.15	48.00-72.00	K55	LTC/STC/BTC	R1/R2/R3

API 5CT J55 CASING PIPE

The API J55 casing and tubing have wide application used in the shallow wells, geothermal wells, and water wells in the natural gas and coalbed methane due to its lower price relatively. WLD steel is a leading API 5CT casing and tubing manufacturer and supplier, we provide not only a broad range of API 5CT J55 oilfield casing pipe and API 5CT J55 tubing but also casing coupling, perforated pipe and more.

API 5CT J55 Chemical Composition

Grade	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
API 5CT J55	0.34-0.39	0.20-0.35	1.25-1.50	0.020	0.015	0.15	0.20	0.20	/

API 5CT J55 Mechanical Property

Steel Grade	Yield Strength (Mpa)	Tensile Strength (Mpa)	Total elongation under load %
API 5CT J55	379-552	≥517	0.5

API 5CT J55 Tolerance

Item		Allowable tolerance
Outer diameter	Pipe body	D≤101.60mm±0.79mm
		D≥114.30mm+1.0%
		-0.5%
Wall thickness		-12.5%
Wight	Single piece	+6.5%+3.5%
	Total weight	-1.75

API 5CT J55 Size Chart

Outer Diameter		Wall Thickness	Weight	Grade	Threaded	Length
in	mm	kg/m	lb/ft	Grade	Threaded	Length
4 1/2″	114.3	14.14-22.47	9.50-11.50	J55	LTC/STC/BTC	R1/R2/R3
5″	127	17.11-35.86	11.50-24.10	J55	LTC/STC/BTC	R1/R2/R3
5 1/2″	139.7	20.83-34.23	14.00-23.00	J55	LTC/STC/BTC	R1/R2/R3
6 5/8″	168.28	29.76-35.72	20.00-24.00	J55	LTC/STC/BTC	R1/R2/R3
7″	177.8	25.30-56.55	17.00-38.00	J55	LTC/STC/BTC	R1/R2/R3
7 5/8″	193.68	35.72-63.69	24.00-42.80	J55	LTC/STC/BTC	R1/R2/R3
8 5/8″	219.08	35.72-72.92	24.00-49.00	J55	LTC/STC/BTC	R1/R2/R3
9 5/8″	244.48	48.07-86.91	32.30-58.40	J55	LTC/STC/BTC	R1/R2/R3
10 3/4″	273.05	48.73-97.77	32.75-65.70	J55	LTC/STC/BTC	R1/R2/R3
11 3/4″	298.45	62.50-89.29	42.00-60.00	J55	LTC/STC/BTC	R1/R2/R3
13 3/8″	339.72	71.43-107.15	48.00-72.00	J55	LTC/STC/BTC	R1/R2/R3

API 5CT N80 CASING PIPE

There is two types for API 5CT N80 oilfield casing pipes: N80-1 and N80-Q types, which have the same chemical composition and mechanical attributes while just various in the heat treatment. N801 steel pipe is treated by normalizing and tempering and N80Q is treated by quenching and tempering. The collapsing strength and internal pressure strength of N80Q are higher than that of N801 correspondingly.

API 5CT N80 Casing Tubing Color Code

Name	Casing	Coupling
N80-1	a bright red band	entire red coupling
N80-Q	a bright red band + a green band	entire red coupling + a green band

API 5CT N80 Chemical Composition

Grade	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
N80 type1/Q	0.34-0.38	0.20-0.35	1.45-1.70	0.020	0.015	0.15	/	/	/

API 5CT N80 Mechanical Property

Grades	Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation under load, %
N80 type 1	552-758	689	0.5
N80 type Q	552-758	689	0.5

API 5CT N80 Tolerance

Item		Allowable tolerance
Outer diameter	Pipe body	D≤101.60mm±0.79mm
		D≥114.30mm+1.0%
		-0.5%
Wall thickness		-12.5%
Wight	Single piece	+6.5%+3.5%
	Total weight	-1.75

API 5CT N80 Size Chart

Outer Diameter		Wall Thickness	Weight	Grade	Threaded	Length
in	mm	kg/m	lb/ft	Grade	Threaded	Length
4 1/2″	114.3	14.14-22.47	9.50-11.50	N80	LTC/STC/BTC	R1/R2/R3
5″	127	17.11-35.86	11.50-24.10	N80	LTC/STC/BTC	R1/R2/R3
5 1/2″	139.7	20.83-34.23	14.00-23.00	N80	LTC/STC/BTC	R1/R2/R3
6 5/8″	168.28	29.76-35.72	20.00-24.00	N80	LTC/STC/BTC	R1/R2/R3
7″	177.8	25.30-56.55	17.00-38.00	N80	LTC/STC/BTC	R1/R2/R3
7 5/8″	193.68	35.72-63.69	24.00-42.80	N80	LTC/STC/BTC	R1/R2/R3
8 5/8″	219.08	35.72-72.92	24.00-49.00	N80	LTC/STC/BTC	R1/R2/R3
9 5/8″	244.48	48.07-86.91	32.30-58.40	N80	LTC/STC/BTC	R1/R2/R3
10 3/4″	273.05	48.73-97.77	32.75-65.70	N80	LTC/STC/BTC	R1/R2/R3
11 3/4″	298.45	62.50-89.29	42.00-60.00	N80	LTC/STC/BTC	R1/R2/R3
13 3/8″	339.72	71.43-107.15	48.00-72.00	N80	LTC/STC/BTC	R1/R2/R3

API 5CT L80 CASING PIPE

There are three types for API 5CT L80 oilfield casing pipes: L80 type 1, L80 type 9Cr, and L80 type 13Cr. L80 type 1 is utilized during the H2S condition, while L80 type 9Cr and 13Cr are used for the CO2 application. WLD steel is a leading API 5CT casing and tubing manufacturer and supplier, we provide not only a broad range of API 5CT L80 oilfield casing pipe and API 5CT L80 tubing but also casing coupling, perforated pipe and more.

API 5CT Grade L80 Casing Tubing Color Codes

Name	Casing	Coupling
L80-1	A red band + a brown band	Entire red coupling + a brown band

API 5CT L80 Chemical Composition

Grade	C	Si	Mn	P	S	Cr	Ni	Cu
API 5CT L80	0.15-0.22	1.00	0.25-1.00	≤0.020	≤0.010	12.0-14.0	0.20	0.20

API 5CT L80 Mechanical Property

Grades	Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation under load, %	Hardness, HRC
L80 type 1	552-655	655	0.5	23
L80 type 9Cr	552-655	655	0.5	23
L80 type 13Cr	552-655	655	0.5	23

API 5CT L80 Tolerance

Item		Allowable tolerance
Outer diameter	Pipe body	D≤101.60mm±0.79mm
		D≥114.30mm+1.0%
		-0.5%
Wall thickness		-12.5%
Wight	Single piece	+6.5%+3.5%
	Total weight	-1.75

API 5CT L80 Size Chart

Outer Diameter		Wall Thickness	Weight	Grade	Threaded	Length
in	mm	kg/m	lb/ft	Grade	Threaded	Length
4 1/2″	114.3	14.14-22.47	9.50-11.50	L80	LTC/STC/BTC	R1/R2/R3
5″	127	17.11-35.86	11.50-24.10	L80	LTC/STC/BTC	R1/R2/R3
5 1/2″	139.7	20.83-34.23	14.00-23.00	L80	LTC/STC/BTC	R1/R2/R3
6 5/8″	168.28	29.76-35.72	20.00-24.00	L80	LTC/STC/BTC	R1/R2/R3
7″	177.8	25.30-56.55	17.00-38.00	L80	LTC/STC/BTC	R1/R2/R3
7 5/8″	193.68	35.72-63.69	24.00-42.80	L80	LTC/STC/BTC	R1/R2/R3
8 5/8″	219.08	35.72-72.92	24.00-49.00	L80	LTC/STC/BTC	R1/R2/R3
9 5/8″	244.48	48.07-86.91	32.30-58.40	L80	LTC/STC/BTC	R1/R2/R3
10 3/4″	273.05	48.73-97.77	32.75-65.70	L80	LTC/STC/BTC	R1/R2/R3
11 3/4″	298.45	62.50-89.29	42.00-60.00	L80	LTC/STC/BTC	R1/R2/R3
13 3/8″	339.72	71.43-107.15	48.00-72.00	L80	LTC/STC/BTC	R1/R2/R3