Reverse Circulating Bit
Well Cleaner 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.
Featured case
A well located in Bakken shale in North Dakota was drilled to over 26,000 ft with an extreme-length, three-mile lateral. These wells had been drilled with the objective of increasing production, but the operator was having difficulty achieving enough flow rate to initiate the toe stage of the lateral. The well was dirty and needed to be cleaned and gauged prior to perforation.
Well Cleaner 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.
| Applications |
| Milling of composite plugs |
| Clearing of obstructions |
| Milling of isolation valves |
| Features |
| Passive fail-safe system |
| Modular and configurable |
| Surface read-out SRO |
| Variable heads based on objective |
| Universal: operates on any e-line via DC |
| NACE compliant |
| Benefits |
| No additional fluids required |
| Removes wide range of debris |
| Recovers the debris from the well |
| Large range of ID’s accessible |
| Specifications* | |
| Length (with 3 bailers)* | 26.5 ft → 28.9 ft* |
| Running OD nominal | 2 1/8'' → 3 1/8'' |
| Weight in air* | 200 lbs → 220 lbs* |
| Bit sizes | 2.35" → 7.0” |
| Empty bailer section length / weight | 5.5 ft / 35 lbs → 5.5 ft / 41.4 lbs |
| 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 |
Talk to your local expert
At Welltec, our team of specialists is experienced in resolving the unique challenges of well drilling and operations across diverse terrain. Whatever your need, we can help you find a solution.