The purpose of pre-loading a shouldered connection is to lock
the total length of the threaded helix load flank surfaces together
so that it will not loosen and cause premature fatigue failure.
Actual pin stretch measurement has proven to be much more reliable
than circumferential displacement in achieving proper connection
make-up and extended work cycle life. A precision linear
measurement device is used to directly measure pin advancement into
the coupling with absolute accuracy. This ensures proper pin
shoulder to coupling end face contact pressure and proper pin neck
With our system, your rods are delivered to location with precision-installed
couplings. This ensures the torsional forces of the field
end makeup are induced into one pin shoulder and one thread helix
eliminating the shared-torque phenomenon of double-ended makeups.
This provides a much better opportunity for a proper single-ended
rig site makeup. An additional benefit is the reduction of crew
labor saving valuable rig time, typically two to three hours running
time on a 6500 ft. string.
Feel free to give us a call and we would be more than happy to
give you a demonstration at our facility.