Jet Air Journal Bearing Bits
For Underbalanced Drilling
Varel's jet air journal bearing bits are specially designed for underbalanced drilling conditions where air, water mist or foam circulation is used. These tungsten carbide insert (TCI) cutting structures are specifically engineered for very efficient drilling of the formation, thorough hole cleaning and the most economical drilling solution available.
Download new Challenger Jet Air Journal Bearing bit brochure (PDF, 1.6 Mb)
Jet Air Nozzles
Replaceable jet air nozzles, retained by a nail lock system, can be sized to optimze hole cleaning.
An optional central jet (premium option) is available on 8 3/4" and larger bits. This optional feature improves cutting structure and hole-bottom cleaning, resulting in increased ROP and reduced drilling costs
Features
| Feature Name |
Feature Code |
TCI Bit |
| Steel Center Air Jet Nozzle |
H
|
Optional Feature** |
| Mud Motor Shirttail Hardfacing |
M
|
Standard Feature |
| Additional Leg Protection |
R
|
Optional Feature* |
| Leading Edge Shirttail Inserts |
S
|
Optional Feature* |
*Optional feature available at extra cost
**Optional features on Air Bits only (available in 8 3/4" and larger only)are available at extra cost.
Download new Challenger Jet Air Journal Bearing bit brochure (PDF, 1.6 Mb)
