Snap Latch Seal Unit

The Snap Latch Seal Unit is designed for use with the Wireline Set D Cement Retainer. It provides positive control of the Cement Retainer Valve, while effectively anchoring and sealing the tubing in the retainer.

The top sub of the Snap Latch Seal Unit acts as a centralizer to ensure the Snap Latch will locate into the retainer bore - even in deviated wells.

This Snap Latch Seal Unit normally comes with API EUE Box connections, and other connections are available on request.

Operation

When the Snap Latch Seal Unit enters the retainer, the bottom Shifter Sub pushes the Retainer Valve open. At the same time the Snap Latch Collet collapses into and engages the latch threads in the top of the retainer, thereby anchoring the tubing to the retainer.

The Snap Latch Collet on the Seal Unit is free to move up or down 76mm (3") on the mandrel, allowing the Retainer Valve to be opened or closed while the Snap Latch Seal Unit is still locked and sealed into the retainer. This feature also allows for pressure testing the tubing string before squeezing. Picking up will close the valve and moving down opens it.

To release the Seal Unit from the retainer it is necessary to pull approximately 4,500 daN (10,000 lbs.) over string weight. The force required to do this will decrease after repeated useage until it stabilizes at approximately 2,000 daN (5,000 lbs.) force over string weight.

Address

Suite 7
4351 – 104 Avenue S. E.
Calgary, Alberta, T2C 5C6, Canada

Telephone / Fax

1.403.252.9230 (T)
1.403.252.9350 (F)

Email

info@protexcis.com