String Book - Logan Oil Tools

Snub
Line
proper pLacement of torQUe inDicatorS
Step : Look up the minimum recommended
torque required.
Step : Divide this torque value by the effective
tong length.
Step : Divide this by 3 and multiply by 2. This
will be the pounds pull reading for the line-pull
indicator when in this position.
Snub
Line
90°
90°
Torque Indicator
Torque Indicator
Snub Line
The amount of cathead
pull will be 1/2 of the
line-pull reading on
the Torque Indicator.
Snub Line
The amount of cathead
pull will be 1/2 of the
line-pull reading on
the Torque Indicator.
Step : Look up the minimum recommended
torque required.
Step : Divide this torque value by the effective
tong length.
Step : Divide this by 5 and multiply by 4. This
will be the pounds pull reading for the line-pull
indicator when in this position.
Snub Line
Torque Indicator
The amount of cathead
pull will be 1/5 of the
line-pull reading on
the Torque Indicator.
Step : Look up the minimum recommended
torque required.
Step : Divide this torque value by the effective
tong length.
The answer is pounds pull reading for the linepull
indicator when in this position.
Multiple line hookups can provide many times
the normal make-up line-pull. Great care should
be taken to see that the lines do not become
crossed, twisted, or fouled. When it comes time
for the “big pull,” be sure everyone is in the clear.
Caution: Know the tong’s rating before the
pull is attempted.
The slack in the tong snub line should be sufficient
for the tongs to obtain full benefit of the pull
from the cathead, but short enough to pre-vent
complete rotation of the tongs.
NOTE: The rotary must be unlocked when the Torque Indicator is in the snub line.
90°
Snub Line
5