Standards For Oil Casing

Purpose:
Oil pipes are pipes that are lowered into wells and used to produce fluids or inject fluids. Casings are steel pipes used on the walls of oil and gas wells in oil production to fix the wellhead and protect the oil pipes.
technical standard:
API 5CT: Specification for Casing and Tubing
API Spec 5B: Specification for Machining, Measurement, and Inspection of Casing, Tubing, and Line Pipe Threads
API TP 5C3: Casing, tubing and line pipe used as casing or tubing formulas and calculations and technical report on performance tables of casing and tubing
ISO 13678: Oil and gas - Evaluation and testing of thread greases for casing, tubing and line pipe
Brand:
ASTM steel pipes and casings can be divided into different steel grades according to the strength of the steel itself, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Different well conditions and well depths require different levels. In corrosive environments, the casing itself is also required to have corrosion resistance. API seamless steel pipes also require impact-resistant casings in places with complex geological conditions.
Oil pipe specifications:
OD×WT 1.900〞~4.500〞×0.125〞~0.630〞
Casing specifications:
OD×WT 4.500〞~16.00〞×0.205〞~0.660〞

chemical composition

Mechanical behavior