Robust tractoring for efficient conveyance
The force and distance requirements to move the plug were modeled with a
tool planner to determine the optimal configuration of the modular TuffTRAC
cased hole services tractor incorporating three drive sections. Although the
TuffTRAC tractor provides reverse tractoring and traction control capability in
highly deviated wells, it has low power requirements and does not have to be
stopped to cool down, even in dry gas wells.
Plug tractored and production resumed
The TuffTRAC tractor was rigged in and run to the plug at 2,754 m. The
tractor was then engaged and began to push the plug to the required plugback
depth. The initial tractoring speed of 1,800 ft/h was soon increased to 2,100
ft/h for the remainder of the descent to 3,553 m. Because the TuffTRAC tractor
was able to move and install the plug where it belonged in the
high-H2S and -CO2 well, Talisman saved USD 300,000 by not
having to deploy a coiled tubing rig to conduct an intervention.