DSI – PBL

In combating losses, DSI-PBL Circulating Sub is used in the bottom hole assembly to have an additional option for circulating large amount of LCM.Not only for combating losses, DSI-PBL Circulating Sub is also substantial for Hole Cleaning and BOP Cleaning. The PBL tool has proven to be a financially beneficial incentive for operators, by substantially reducing loss rig time and circulating hours. A special safety feature of the tool is, that whenever pumps are turned off, the sleeve shifts to the closed position and isolates the ports, which eliminates the u-tube effect and assures full well integrity.

The vinyl ball will shear through the seat at a predetermined pressure. 100% of the flow will be reestablished to the drill bit. All balls will fall into the ball catcher cage which is designed to hold up to 5 sets of balls. Extended catcher cages to accommodate up to 10 sets of balls are available on request. High temperature applications – up to 450°F (232°C).