User Manual
Tool Catcher
OPS-4428 Rev A
6
3.3 Withdrawal of Tool String (Catching)
Tool string withdrawn from well
As tool approaches iris fingers they
automatically open allowing tool to
pass
Once wider part of tool passes
through iris the fingers close to the
size of the tool neck
Upper set of fingers act as a buffer to
prevent tool from being totally
withdrawn from the catcher
With tension released on the tool
string the tool drops and rests on the
iris fingers
Note:
if a longer fish neck is used the upper set of fingers are not fitted and
therefore the tool can be withdrawn from the top catcher when rigging down.