PBL Multiple Activation Bypass System

The tool has proven itself for decades and offers the perfect solution for many drilling problems.
PBL Booster Tool
PBL Booster Tool
With its robust and proven design, the PBL Multiple Activation Bypass System offers a simple, cost-effective technical solution to common drilling problems, such as lost circulation and limited circulating rates. As it helps to reduce the number of trips and limit non-productive time when circulating, the PBL Tool has a positive financial impact to lowering drilling costs.

PBL Tool

The Tool

DSI PBL Multiple Activation Bypass System is the leading multi-cycle circulating tool in the Oil & Gas industry today. Simple and robust, PBL Tool consists of a “Main Body” which houses all the major components required to enable activation, deactivation and proper functioning of the tool. A “Catcher Sub” located below the Main Body contains the “Catcher Cage” enabling the spent balls / darts to be captured within it.

Activation mechanisms

Choose a method to experience the tool:

Standard Ball

Fast Ball

Fast Dart

Split Flow Dart

Choose your activation
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Standard Ball

Fast Ball

Fast Dart

Split Flow Dart

The Standard Ball is the most commonly used activation medium for DSI PBL tools. To activate The Tool, a vinyl ball is pumped down to the ball seat. Once on seat, a slight backpressure is created, which forces the sliding sleeve to move to the ports-open position. In this position, sleeve and main body ports are perfectly lined up and 100 % of the drilling fluid exits The Tool through the ports to the annulus. To deactivate the tool, depending on the number of ports in the tool, two or three steel de-activation balls are dropped and pumped down. Theses steel balls, once reached the ports, will create flow restriction as all ports are now plugged. Pressure will build up quickly until a predetermined pressure is reached forcing the vinyl activation ball to extrude through the seat followed by all steel balls. PBL tool is subsequently cycled to ports-closed position and 100% flow is re-established through the Tool and all balls are captured in the Catcher Cage positioned below the Main Body.

  • Temperature: Up to 230°C or 450°F
  • Density: 1.34sg or 11.2 ppg
  • Fast Ball is a much denser activation ball in comparison to the standard ball and, is used in applications where high mud weights and high temperatures occur. This feature allows for a quicker activation of the PBL tool which is especially helpful in situations where there is limited or no circulation.

  • Temperature: up to 260°C or 500°F
  • Density: 2.50sg or 20.9 ppg
  • Fast / Hollow Dart, is a heavy dart, which can be used in the highest mud weights, or where mud cannot be circulated e.g. packed-off situation whereby it facilitates activation by gravity drop. It is much faster than a standard ball, hence it reduces activation time significantly. “Descent by gravity only” can be used in wells with a maximum inclination of up to 55° whereas, “Descent by being pumped down” can be used in wells with a maximum inclination of up to 90°.

    Split Flow Dart allows drilling fluid to be split partially through the BHA and partially to the annulus. Depending on whether the requirement for split flow is for hole cleaning while drilling ahead or just for cooling MWD tools and motors during a back-reaming operation, the percentage split to BHA and annulus can be customized to suit customers’ specific needs. The percentage split can be pre-set by means of installing suitably sized jet nozzles in the Split Flow Dart and Side Ports subsequent to performing necessary hydraulics calculations. Three steel balls are used to deactivate the tool.

    Specialised leadership

    The PBL Multiple Activation Bypass System is our core solution. The patented technology is simple yet ingenious. As the original fluid bypass solution, it offers significant technical and safety advantages, especially in terms of functionality, flexibility and reliability.

    PBL by DSI

    Innovation news

    News

    ANOTHER MYTH BUSTED!

    “DSI PBL Tools are capable of offering Constant Split Flow as well as On-demand Split Flow features, True or False?”
    News

    DSI HydraFlow©

    DSI launches HydraFlow© Unlimited Cylce, Full Bore Bypass Sub
    News

    Using PBL for Vibration Mitigation

    If off bottom high speed string rotation during clean up cycle is a concern (vibrations, tool failures, etc.), a PBL tool can be used as an alternative for achieving the hole cleaning objective. Activating the tool to bypass flow above the BHA will allow for higher flow rate by eliminating the BHA and bit pressure losses. Depending on the hydraulics and ECD limitations, if high flowrate can achieve a turbulent regime across the drill pipe annulus, this can be effectively used to achieve the hole cleaning objective without subjecting the BHA to high speed off bottom rotation, thus preventing any further risk of damage/ failure to the BHA.