The Subdrill DSV™ Test Stand provides a quick, easy, pre-defined and safe method of testing Drill Stem Valves prior to installation in the string, without requiring the Rotary Table, Rig Tongs or Iron Roughneck.

Now standard protocol with a number of drilling contractors, the Subdrill DSV Test Stand has been designed with speed, efficiency and safety in mind. By utilising the DSV™ Test Stand, Drill Stem Valve testing can be carried out quickly and safely off-line in parallel with BOP testing or drilling. In addition, it is estimated that the operator will save approximately 2-3 hours during a routine rig BOP test.


Drill-Stem Test Tool / Valves
The drill-stem tool has four compulsory components, the pressure recorders, the test valves, the hydraulic by-pass or equalising valves, and the packers. In particular, the valves have a major role to play in the operation of the drill-stem. Making sure that the valves are tested correctly and function properly under pressure is vital to the operational integrity of the drill-Stem. The Subdrill DSV™ Test Stand has the following features and benefits:

15,000 psi Maximum Working Pressure

Requires only a Chain Tong for make-up and break-out of X-Overs and Valves

Avoids the use of the Rotary Table, Rig Tongs or Iron Roughneck

Compact design

Interchangeable X-Overs available for Drilling & Tubing Rotary Threads

Non-Rotate feature

Tests off-line in parallel with BOP testing or drilling

Saves 2-3 hours during a routine rig BOP test


DSV Test Stand, Sub drill

DNV design Sub-Drill / DNV Design Verification

DSV Test Stand components