The DTIN Standing Valve is a wireline retrievable pack-off device designed to land onto no-go seating type nipples. Whilst in situ, the DTI Standing Valve will hold pressure from above but can also allow the well to flow.

The DTIN Standing Valve is designed to withstand prolonged flow wear and is simple to redress; kits comprise a Ball, Seat, V-packings, and three O-rings. A shear sleeve pressure equalisation feature permits easy retrieval from the well.

The DTIN Standing Valve is commonly used for testing completion tubing. It may also be used for packer setting, or in gas wells where fluid retention is required in the tubing string.