Ensuring gauge while eliminating doglegs & ledges
Paradigm Drilling's Reamer™ tools have been designed to offer all the performance benefits of a Roller Reamer – (Low torque “point stabilisation”) 75-80% less contact area compared to conventional stabilisers, capability to remove micro dog legs / ledges and torque reduction with the use of Domed Diamond Inserts (DDI) technology. The BDR achieves all of these objectives whilst avoiding the historic risks associated with Roller Reamers including, bearing failures, lost pins, rollers and flex due to wear. This has made Operators reluctant to adopt Roller Reamers.
The Reamer™ utilises Domed Diamond Inserts designed specifically for this application and are supplied by the world’s leading supplier of Diamond drilling and cutting technology. The Domed Diamond Inserts are similar to Impregnated Diamond drill bit material and designed to maximise cutting efficiency while greatly increasing tool life while maintaining gauge.
Due to the proprietary blend of Diamond and binder composition the Domed Diamond Inserts are more durable and resistant to chipping and breakage than conventional PDC or Tungsten Carbide inserts, likened to an Impregnated Diamond Drill Bit. The Domed Diamond Inserts are non-magnetic and can be installed in steel or non-magnetic bodies.
Features & Benefits
Paradigm’s Reamer™ tools are typically provided as a string based configuration, however, Near-Bit and At-Bit versions are also available providing radial and linear reaming support helping ensure gauge at the bit.
The Reaming contact area is at least 50% greater and therefore more efficient than that offered by the market leading Roller Reamers, ensuring a more efficient removal of ledges and micro dog-legs while dramatically improving stabilisation. This provides an optimised borehole quality and shape due to the geometry of the near-bit and At-Bit tools, enhancing maximum steering accuracy.
The String Reamer™ tools can be placed at the top of the BHA to provide reaming and back-reaming capability if required when pulling out of hole as well as reducing hole damage while reducing string torque.
The fluid by-pass channels are designed to provide maximum flow by areas and active hole cleaning. Supported through the use of geometric modifications that enhance the fluid velocity and turbulent flow throughout the length of the run ensuring consistent hole.