User Manual
Greasehead
145-2884-HV0
OPS-2884 Rev E
6
3.2.4 Tension Pack off
The pack off assembly allows a rubber seal to be made against static wire in
order to prevent the escape of well fluids if the grease seal is lost. In some
greaseheads the packing can become energised by the flow of the grease
and can cause it to grip down on the wire and prevent or restrict the running of
the wire. The Phuel pack off element is located at both ends and is held in
tension to prevent this kind of problem from occurring.
3.2.5 Lower Pack off Option
As an option there is a lower pack off assembly that can be attached below
the lower flow tube to provide a lower pack off assembly. This can be used to
quickly re-establish the grease seal during operations rather than circulating
the grease all the way to the BOP.
The lower pack off would be closed with the upper one and grease circulated
through only the greasehead length without any losses in to well below. This
will provide a smaller volume for circulation and may eliminate the need to
close BOP on the wire – thus saving valuable operational time.