API: It is the abbreviation of American Petroleum Institute in English, and Chinese means American Petroleum Institute.
OCTG: It is the abbreviation of Oil Country Tubular Goods in English, which means special oil pipes in Chinese, including product oil casing, drill pipe, drill collar, coupling, short joint, etc. According to statistics, for every one meter drilled, about 62kg of oil well pipe is required, including 48kg of casing, 10kg of tubing, 3kg of drill pipe, and 0.5kg of drill collar.
Tubing: The tubing used in oil wells for oil production, gas production, water injection and acid fracturing.
Casing: A pipe used to line the borehole from the ground surface to prevent the well wall from collapsing.
Drill pipe: A pipe used in a wellbore.
Line pipe: a pipe used to transport oil and gas.
Coupling: Used to connect two threaded pipes and a cylindrical body with internal threads.
Coupling material: the pipe used to make the coupling.
API thread: the pipe thread specified in the API 5B standard, including tubing round thread, casing short round thread, casing long round thread, casing buttress thread, line pipe thread, etc.
Special buckle: non-API thread buckle type with special sealing performance, connection performance and other properties.
Failure: Deformation, fracture, surface damage and loss of original functions under specific service conditions. The main forms of tubing and casing failure are: collapse, slippage, rupture, leakage, corrosion, adhesion, wear and so on.
Petroleum pipe related standards
API 5CT: Specification for Casing and Tubing
API 5D: Drill Pipe Specification
API 5L: Specification for line pipe
API 5B: Specification for processing, measurement and inspection of casing, tubing and line pipe threads
GB/T 9711.1: Technical delivery conditions of steel pipes for oil and natural gas industry Part 1: Grade A steel pipes
GB/T 9711.2: Technical delivery conditions of steel pipes for oil and natural gas industry Part 2: Grade B steel pipes
GB/T 9711.3: Technical delivery conditions of steel pipes for oil and natural gas industry Part 3: Grade C steel pipes.
Post time: Jan-13-2022