Petroleum casing pipe standard: API SPEC 5CT
Length range: R1(6.10m~7.32m), R2(8.53~9.75m), R3(11.58m-12.80m)
Petroleum casing steel grades: H40, J55, K55, N80, L80, C90, T95, P110, Q125, V150.
Thread Type: LTC,STC,BTC,VAM,EUE,NUE
Different types of casing used in oil production: Surface oil casing protects the well from contamination by shallow water and shallow gas layers, supports wellhead equipment and maintains the weight of other layers of casing.
Technical oil casing separates pressure at different levels so that drilling fluid flows properly and protects production casing. In order to install anti-burst device, anti-leakage device and tail pipe in the well.
Reservoir oil casings conduct oil and gas from subsurface reservoirs. Used to protect drilling and layer drilling mud. When oil casing is produced, the outer diameter is usually 114.3 mm to 508 mm.
Chemical Composition:
Mechanical Properties:
Length Range:
Tips: ERW welded pipe is formed by rolling strip and welding the seam, with tighter dimensional tolerances and less weight. The weld seam is heat treated after welding that no untempered martensite remains, and the weld flash can be removed from both inner and outer surfaces.
ASTM A53 ERW steel pipe is a typical carbon steel pipe. It is largely used to convey fluids at low / medium pressures such as oil, gas, steam, water, air and also for mechanical applications.
Go here if you are looking for the "Seamless Casing vs. ERW Casing".
