Well Miller RCB 00000 JPG

Welltec® RCB

For milling solutions


The Welltec® RCB (Reverse Circulating Bit) for Milling Solutions integrates both a rotary bit with a suction system to provide the combined benefits of both in one powerful tool. This design breaks through hard packed debris and recovers the generated cuttings with suction into the integrated bailers. In one run you can crush mineral deposits like cement and remove them from the well to prevent further associated problems.

  • Challenge
    Downhole hardware
    Downhole access
  • Applications
    Removal of composite plugs, consolidated debris, ball seats and isolation valves
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Case highlight

Downhole access

In Kazakhstan an operator completing multi-stage, horizontal wells has historically accomplished this using drop balls and baffles which were subsequently milled out afterwards with coiled tubing...

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The Welltec® RCB (Reverse Circulating Bit) for Milling Solutions 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 RCB Vert 00000
Well Miller RCB Hori 00000


  • Removal of composite plugs
  • Removal of ball seats
  • Removal of isolation valves


  • Passive fail-safe system
  • Modular
  • Surface read-out
  • 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 (DE)
  • Large range of ID’s accessible
  • Accurate depth control
  • Operates on any e-line via DC


Body 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 25,000 lbs 42,000 lbs
Compressive strength 38,000 lbs 50,000 lbs