Reservoir Group’s TazTM Multiple Activation Circulating Sub delivers in BHA’s with large volumes of drilling fluid, ensuring that a through bore clearance is maintained through the tool at all times.
Taz outperforms standard circulating subs when pumping large volumes of drilling fluid due it’s unlimited number of activations downhole. The Taz circulation sub remains dormant in the BHA until opened by dropping an activation ball, which then disappears completely. The resulting pressure drop allows the j-slot mechanism to engage, opening multiple ports to the annulus. The TFA of the nozzles within the ports can be selected to suit the application, with the percentage of diverted flow being a function of their size and the pressure drop below the tool.
The central feature of the Taz system is the proprietary drop ball mechanism – the ball ‘disappears’ upon activation, ensuring that a through bore clearance is maintained through the tool at all times. Closing the ports is achieved by pumping down an identical ball, which also ‘disappears’ upon de-activation, leaving the tool dormant and ready to be activated again in a truly endless cycle.
Download the full Circulating Sub Taz™ datasheet.