Tubing is a relatively small-diameter pipe
that is run into a well to serve as a conduit for the passage of oil and gas to
the field surface facilities for processing. Tubing must be adequately strong
to resist loads and deformations associated with production and work overs.
Further, tubing must be sized to support the expected rates of production of
oil and gas.
API Spec 5CT – Specification 5CT/ISO
11960,GB/T 19830-2011 Specification for Casing and Tubing, Eighth Edition,
Petroleum and natural gas industries-Steel pipes for use as casing or tubing