Reliable and simple borehole enlargement


Paradigm’s Extreamer® is a hydraulically activated expandable reaming tool that can be used to increase hole size while drilling ahead or after a pilot hole has been drilled. The tool can withstand high side loads often seen in highly deviated wells, however, the three blocks close when pumps are stopped to ensure clean retrieval from the wellbore.

The Extreamer®is designed to provide top quality hole opening from a robust and versatile tool design. Float equipment can be drilled out prior to activating the tool or it can drill a pre-existing hole. Once activated, the cutter blocks are held open geometrically when weight on bit is applied. Due to the nature of our opening mechanism, the cutter blocks are not susceptible to side load closure in highly deviated or horizontal applications.

When circulation pressure is reduced and the Extreamer® is pulled back (WOB is removed) the internal return spring pushes the blocks into the tool body.

The tool assembly is integral within the body of the tool and all hard metal components are retained via an API service connection rated above the end connections.


  • Blades will retract on retrieval
  • Blocks held open using hydraulics and/or set down weight
  • Can support assembly weight without collapsing blocks
  • PDC cutting structure, series of nozzles to cool and clean the cutter blocks
  • Integral assembly locked by service connection

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