What is an API coupling?
API Coupling refers to the steel couplings that used in connecting casing pipe and tubing. Also known by OCTG coupling, it is usually manufactured in seamless type, material grade same with the pipe body (API 5CT K55/J55, N80, L80, P110 etc), same PSL or providing higher grades than requested.
What is casing coupling?
A short length of pipe used to connect two joints of casing. A casing coupling has internal threads (female threadform) machined to match the external threads (male threadform) of the long joints of casing. The two joints of casing are threaded into opposite ends of the casing coupling.
What is API casing?
Oil pipes are mainly used for oil and gas well drilling and oil and gas transportation. It includes an oil drilling pipe, oil casing, and oil extraction pipe. Oil drill pipe is mainly used to connect drill collars and drill bits and transmit drilling power.
What is the API tolerance for casing?
Tolerance for casing and tubing wall thickness is -12.5%.
What are the three types of coupling?
Types of Couplings
Rigid coupling.
Flexible coupling.
Sleeve or muff coupling.
Split muff coupling.
Flange coupling.
Gear coupling.
Universal joint
Oldham coupling.
