Challenger™ TCI Bits

HET^TM Inserts

Varel's patented High Energy Tumbling (HET) technology improves the toughness and fracture resistance of tungsten carbide inserts. Challenger bits with HET inserts have less breakage, which means increased ROP and extended cutting structure life, resulting in lower drilling costs.

Advanced Cutting Structures

Challenger tungsten carbide insert (TCI) cutting structures are designed to be durable, while maintaining the highest efficiency in rock destruction. Insert row placement and insert spacing are determined using Varel's proprietary algorithms designed to reduce wear, promote efficient drilling and ensure uniform loading across the bit face. It also prevents tracking in a wide range of formations and conditions.

Gage Protection

Advanced gage protection is standard on all Challenger TCI bits. Semi-round top (SRT) tungsten carbide inserts on the back row aid in cutting the wall of the hole. These resist wear better than flat-topped inserts.

Shirttail Protection Feature
To enhance gage holding and seal protection, Varel roller cone bits provide value with a variety of shirttail protection packages for high-angle drilling, abrasive formations and steerable applications. These shirttail protection packages can be used to tailor bits to meet your drilling needs.

                                    Download Shirttail Protection Features

Optional Diamond Enhancement Features 
 

• Diamond Enhanced Back Row (D Feature)
• Diamond Enhanced Gage and Back Row (DD Feature) 
• Fully Diamond Enhanced Cutting Structure (D3DD Feature)   

Tungsten Carbide Coated Cones
(E Feature) - optional*

All exposed portions of the TCI cones are coated with tungsten carbide to provide maximum resistance in applications where cone shell erosion limits bit life.

*optional features available at extra cost