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DDT Underreamers (Drilling Drag Type) are built to utilize either ADD Cutters or PDC Cutters where circulation is required through the tool. Designed with the piston and actuator combined as a single component, the tool operates with only one moving internal part.

The relatively short overall length of the tool allows for easier steerability when drilling and underreaming simultaneously. The three bladed design, assisted with the reverse jetting action assures a full gauge hole and increased cutter life.

Below are Parameter for this series

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