OCTG Casing and Tubing (with API 5CT Specification)
Usage:
Tube for conveying gas, water, and oil in both and natural gas industries etc.
Casing:
Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore. It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow drilling fluid to circulate and extraction to take place. Steel Casing Pipes have smooth wall & minimum yield strength of 35,000 PSI.
Tubing:
Tubing is pipe used for the transportation of crude oil and natural gas from an oil or gas layer to the surface after drilling is complete. It is made to withstand the pressure generated from the extraction process. Tubing is manufactured in the same way as casing, except that an additional process known as "upsetting" is applied to thicken the pipes.
Quality Standard:
SY/T 6194 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells
API 5CT CASING AND TUBING
BS EN ISO 11960 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells NF M87-207 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells
JIS G3439 SEAMLESS STEEL OIL WELL CASING, TUBING AND DRILL PIPE
IS: 4270 Steel tubes for well spainend casing pipes
Steel Grade: H-40, J55, K-55, N-80, C-75, L-80, C-90, T-95, Q-125
Process: ERW and Seamless
Size:
1) Tubing
OD: 2 3/8" -- 4 1/2"
WT: 0.167" -- 0.630"
Note: P: Plain end, N: Non upset, U: External upset, T&C: Threaded and coupled.
2) Casing
OD: 2 3/8” -- 20"
WT: 0.205"-- 0.5"
Note: P: Plain end, S: Short round thread, L: Long round thread
Length:
| R1 | R2 | R3 | |
| Tubing | 6.10-7.32m | 8.53-9.75m | 11.58-12.80m |
| Casing | 4.8 -7.62m | 7.62-10.36m | 10.36-14.63m |
OD: 2 3/8" - 5 1/2"
WT: 0.280" - 0.449"
Note: EU: External upset, IEU: Internal & External upset
Thread of tool joint is right-hand or left hand
Thread is copper- plated or phoshphated
Connection: Casing: LTC, STC, BTC, VAM. Tubing: NUE, EUE.
End: Beveled, Square cut. And pipe protection cap specially for casing and tubing.
Surface: Corrosion proofing water based paint
Heat treatment: Normalized, Quencher Temper
Packing:
The casing pipe will be packed into bundles as 3*3, 3*4, 4*4 etc. and loading into containers after black painting and thread protectors installation.
Test:
Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield
strength, Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc), Exterior Size Inspection, Nondestructive Test (Ultrasonic flaw detector, Eddy current flaw detector), Hydrostatic Test.
