Dual Circulating Sub
- Designed as a circulating safety component within the BHA
- Design features include a shear out ball seat coupled with a burst disc
- Field redressable
- Simple drop ball design to activate
The Dual Circulating Sub is designed as a circulating safety component within the BHA. The design features a Shear-Out Ball Seat coupled with a Burst Disc.
In the event that circulation is lost during a coiled tubing operation, an increase in applied pressure to the tubing will burst the disc, which will regain a sufficient circulation rate to pump a ball.
Pressure can then be applied to the tubing to shear the shear screws and shift the piston to regain maximum circulation.