Petroleum tubing: pipes used for oil production, gas production, water injection and acid fracturing in oil wells. API: It is the abbreviation of American Petroleum Institute in English, Chinese meaning is American Petroleum Institute.
Petroleum casing: a pipe that has been drilled from the ground surface as a lining to prevent the collapse of the well wall.
Line pipe: a pipe used to transport oil and gas.
OCTG: It is the abbreviation of Oil Country Tubular Goods in English, and the Chinese meaning is special pipe for petroleum, including product oil casing pipe
, drill pipe, drill collar, coupling, short connection, etc.
API thread: Pipe thread specified by API 5B standard, including tubing round thread, casing short round thread, casing long round thread, casing trapezoidal thread, pipeline pipe thread, etc.
Special buckle: Non-API thread buckle type with special sealing performance, connection performance and other properties.
Failure: Phenomenon of deformation, fracture, surface damage and loss of original function under specific service conditions. The main forms of tubing failure are: crushing, slipping, rupture, leakage, corrosion, adhesion, wear, etc.
Drill pipe: a pipe used for drilling holes.
Coupling: It is used to connect two threaded pipes with internal thread cylinder.
Coupling material: used to make pipes for couplings.