IPSCO CONNECTIONS
RUNNING MANUAL
3
Interchangeability
ULTRA™ SF and SFII are neither compatible between both connections nor interchangeable between different
weights of the same connection and nominal OD. A crossover is needed if running a mixed weight string or
accessories.
Features
ULTRA™ SF and SFII connections have unique run-in and run-out threads on the pin and box:
A run-in thread is an imperfect thread, in the first few starting threads, formed as an insert cuts on a
cylindrical path into a previously blanked cone. The threads start from zero thread height and become
taller with each thread until they become full in height.
A run-out thread (e.g. Buttress pin) is an imperfect thread, in the back-end threads, formed as an insert
cuts on a taper path and intersects a cylinder. The threads start full in height and shorten with each thread
until they disappear.
A fully ULTRA™ SF and SFII shouldered connection will have a machined area on the pin OD that
extends 0.250” from the box face.
