LKz Threading Die Collar

Application

LKz threading die collar externally engages and retrieves a fish in the wellbore.

Design

Being a tube section made out of forged alloy steel, the die collar has box thread at its upper end and carburized V-shaped internal fishing thread with ¾”TPF(1:16) and flutes, designed to flush out the cuttings while engaging the fish, at its lower end.
The tool has a watercourse to maintain circulation.
The die collar is available in right- and left-hand configuration. The right-hand die collar is used to retrieve all remaining tubes at once; the left-hand one is used for fragmentary retrieval of the fish, by breaking out fish string.
The die collars are typically furnished with a cutlip guide in order to pick up the fish pressed against the wall. If fishing in cavern of an open-hole section, use a wall hook.
Reliable engagement of the die collar on the fish allows for reciprocation at higher loads and easy disengagement after fishing operations are completed.
All sizes are for reference only.