differences between N-80 and L-80 Casing Pipe

ASTM A335 alloy seamless steel pipe Gr. P22, 3 inch SCH 120

November 3, 2016

API 5DP drill pipe, Grade E75, OD 127mm , wall thickness 12.7mm

November 10, 2016

casing pipe, tubing pipe

API 5CT N-80 and L-80 CASING PIPE SPECIFICATIONS:

Readily available Sizes: 2 3/8 ″, 2 7/8 ″ and 3 1/2″ Outer Diameter
Macaroni Tubing: 1 1/4″– 2 1/16″ Nom.
Grades: J55, K55, N80, L80, P110
Specializeds:.
Threading.
Heat treating.
External upset.
Wandering (Full-length, or simply ends).
Hydrostatic Testing.
Full third-party examination capabilities (EMI, SEA, and Weld Line).
Couplings– EUE, AB Modified, denied, unique clearance couplings.
Finishing to client specifications.

End Finishing: External Upset Ends (EUE), PH6 (and equivalent connections), Flush Joint, Integral Joint (IJ).

N80 Casing Pipe Description

N80 steel casing pipe is a crucial tool utilized in oil well drilling (Other important tools consist of drill pipe, core barrel, casing, drill collar, little size steel tube used in drilling, etc.). This casing tube is made from steel of N80 grade. It is used for reinforcing the well wall. It is likewise a tunnel that provides petroleum from underground to surface area. This item is a completion tool used after the drilling procedure and in the past well cementation.

API N80 (or N80 Q&T)

Minimum Yield Strength: 80,000 psi

Maximum Yield Strength: 110,000 psi

Minimum Tensile Strength: 100,000 psi

Hardness Requirement: None

Notes: General purpose pipe manufactured to API specification 5CT.

Functions:
1. The thread and coupling of this steel casing pipe are specially processed which have smooth surface area without any burr, tear or other flaws. These defects might have a bad influence on the products’ strength and connection.

2. The mechanical homes of this product are greater than that of the J55 and K55 types. This steel casing pipe can be used to some more complicated development in much deeper holes. It can be used for the exploitation of middle-level oil and gas.

3. Due to the great efficiency of N80 material, this casing tube is extensively utilized in natural gas and coal bed methane extraction along with in geothermal wells.

4. The sizes of this pipes vary from 41/2″ to 20″. All pipes are produced strictly in accordance with API requirements.

N80 steel casing pipe is an essential tool used in oil well drilling (Other crucial tools consist of drill pipe, core barrel, casing, drill collar, little size steel tube utilized in drilling, and so on). The thread and coupling of this steel casing pipe are specially processed which have smooth surface area without any burr, tear or other problems.

API Normalized N80

Minimum Yield Strength: 80,000 psi

Maximum Yield Strength: 110,000 psi

Minimum Tensile Strength: 100,000 psi

Hardness Requirement: None

Notes: A lower cost alternative to standard Quench and Tempered API N80 (walls less than 0.500 inch). Inspection, testing, and dimensions are in accordance with API 5CT for grade N80. Charpy v-notch impact test absorbed energy results meet API SR16 and are lower than Quench and Tempered N80.

API-5CT N80 casing pipe contains N80-1 and N80-Q types. Those 2 products are definitely consistent concerning the chemical structure and mechanical attributes, they are simply different in the heat treatment.

Throughout heat treatment, N80-1 steel is treated by stabilizing and tempering, while N80Q steel is treated by quenching and tempering. For that reason, the collapsing strength and internal pressure strength of N80Q are greater than that of N80-1. When N80 casing is picked, n80-1 or N80Q ought to be clearly shown by the designer.

As its mechanical properties are higher than J55 and K55 types, it might really well be made use of to certain a little bit more challenging developments. With deeper downhole depth than J55 and K55 types, it can be requested the exploitation of middle-level oil and gas.

Due to the high ability of N80 product, those API-5CT casing pipes are broadly used in gas as well as coal bed methane extraction, and geothermal wells.

API 5CT L80 casing pipe

API 5CT L80 petroleum casing pipe refer to the second group of steel grade in accordance with the API 5CT requirement. It is divided into 3 designs, L80-13CR, l80-1 and l80-9cr. In the group last two undergo air quenching procedure.

API L80

Minimum Yield Strength: 80,000 psi

Maximum Yield Strength: 95,000 psi

Minimum Tensile Strength: 95,000 psi

Hardness Requirement: 23 HRC maximum

Specifications

Material:	L80, steel grade
Outer Diameter:	4 1/2″-20″, (114.3-508mm)
Wall Thickness:	5.12-16.13mm
Thread Type:	Buttress thread casing, Long round thread casing, Short round thread casing
Function:	It is used to protect the tubing pipe.

Parameters

Group	Steel Grade	Type	Carbon		Manganese		Molybdenum		Chromium		Nickel Max.	Copper Max.	Phosphorus Max.	Sulfur Max.	Silicon Max.
Group	Steel Grade	Type	Min.	Max.	Min.	Max.	Min.	Max.	Min.	Max.	Nickel Max.	Copper Max.	Phosphorus Max.	Sulfur Max.	Silicon Max.
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
2	L80	1	–	0.43	–	1.9	–	–	–	–	0.25	0.35	0.03	0.03	0.45
	L80	9Cr	–	0.15	0.3	0.6	0.9	1.1	8	10	0.5	0.25	0.02	0.01	1
	L80	13Cr	0.15	0.22	0.25	1	–	–	12	14	0.5	0.25	0.02	0.01	1
Any product is subject oil quenching process above, the upper limit of the carbon content of L80 steel grade can be increased to 0.50%.

Notes: Manufactured to API specification 5CT. This is a controlled yield strength material with a hardness testing requirement. L80 is usually used in wells with sour (H2S)environments.

API 5CT L80 petroleum casing pipe is the lifeline to preserve the operation of the oil well. The geological conditions are various in addition to the underground dynamics are complicated and disorderly. Pipes undergo be dictated under numerous forces, such as tensile force, pressure, flexing force, and torsional tension. Under such scenarios the need for remarkable quality for the casing pipe is must. In case of any failure, devastating results such as production disturbance or well termination are inescapable.