Well Miller RCB 00000 JPG

Welltec® RCB (Reverse Circulating Bit)

for Clean-Out Solutions


The Welltec® 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 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 access
    Downhole hardware
  • Applications
    Removal of scale, high viscosity deposits and consolidated debris
Well Miller 360 00000
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Case highlight

Unconventional wells

An operator in South Eastern Saskatchewan was looking for methods to optimize their completion procedures. They were running 4½ cemented liners with ~25 frac sleeves and a burst...

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The Welltec® RCB (Reverse Circulating Bit) for Clean-Out 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 consolidated deposits or debris
  • Cleaning SSSV seats
  • Clearing obstructions
  • Accessing isolation valves
  • Removal of asphaltines and wax
  • Removal of scale


  • 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
Maxi. 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