- Well Miller Reverse Circulating Bit Hero
- Well Miller Reverse Circulating Bit Hero

Well Miller® RCB

Reverse Circulating Bit


The Well Miller RCB (Reverse Circulating Bit) integrates both a rotary bit with a suction system to provide the combined benefits of both in one powerful tool.

This design breaks through obstacles, such as composite plugs, and recovers the generated cuttings with suction into the integrated bailers. In one and the same run you can mill such obstacles as composite plugs and remove them from the well to prevent further associated problems.


Case highlight

A water injection well was undergoing a start-up procedure when a build-up in wellhead pressure was observed indicating a possible blockage by a hydrate...

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The Well Miller RCB (Reverse Circulating Bit) incorporates both a rotary system and a suction system that are combined for maximum efficiency.

This design breaks down hard debris and recovers the cuttings to the surface in the same run. Alternately a nozzle brush can be used instead of a bit to remove hard deposits from the walls of the tubular and retrieve them simultaneously.

Well Miller Reverse Circulating Bit hori


  • Milling of composite plugs
  • Removal of ball seats
  • Milling of isolation valves
  • Clearing of obstructions


  • Passive fail-safe system
  • Modular
  • Variable heads based on objective
  • Wide range of sizes
  • Universal
  • NACE compliant


  • No additional fluids required
  • Removes wide range of debris
  • Recovers the debris from the well
  • Large range of ID’s accessible
  • Accurate depth control
  • Operates on any e-line via DC

Specification range*

Tool OD 2 1/8” 3 1/8”
Length 26.7 ft 28.9 ft
Weight in air 200 lbs 249 lbs
Bit sizes 2.35" 7.0”
Available bailer sizes 2.125” 3.125”
Volume / three bailer 1.08 gals 3.4 gals
Max. well pressure 20,000 psi 25,000 psi
Max. well temperature 302°F 338°F
Tensile strength 24,000 lbs 42,000 lbs
Compressive strength 29,000 lbs 50,000 lbs
* Dependent upon configuration