Cutting & Grinding

TMT Tree Cap Drill

The TMT Tree Cap Drill Tool was originally designed to suit subsea trees.



Easy to install and remove

Corrosion resistant materials

ROV deliverable

ROV handle suits T4 Parallel Jaw

Can be modified to customer requirements

The drill is used to drill 50mm diameter holes underneath an actuating ring of the tree cap (t-cap). It provides a means to access the ring with lifting hooks, to release the t-cap in the event that the hydraulic release mechanism fails.

When deployed, the drill is used to drill three holes in the underside of the t-cap, spaced at approximately 120° apart. Once the three holes are drilled, then the drill is recovered to the surface so that the ROV can handle the large t-cap hooks.

The t-cap hooks are then used to remove the t-cap using the top drive.


TMT can customise the tool to suit your requirements.


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