Roller Cone Bits - Oil & Gas Products 2006-2007 - Varel International

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C h a l l e n g e r S t e e l T o o t h - S e a l e d R o l l e r B e a r i n g B i t s Advanced Cutting Structures Premium Hardfacing Advanced Shirttail Contouring Advanced Shirttail Protection (see page 7) Semi-Round Top Gage Protection Replaceable Center Jet Nozzle (J Feature)** Replaceable Jet Nozzle PREMIUM OPTIONS* • Diamond Enhanced Back Row (D Feature) • Gage Protection (G Feature) • Center Jet Nozzle (J Feature)** STANDARD FEATURES • Mud Motor Shirttail Hardfacing (M Feature) Shown: 17 1/2” CR1GJMRS 18 * optional features available at extra cost ** optional feature (on 8 3/8” & larger bits only) available at extra cost
A v a i l a b i l i t y C h a r t Advanced Cutting Structures Challenger steel tooth cutting structures are engineered to provide the lowest possible drilling costs. Each design has the row placement, tooth spacing and cutter geometry determined to provide high drilling efficiency, minimize tooth wear and prevent tracking in a wide variety of formations and conditions. Advanced Shirttail Contouring Extensive shirttail contouring and clearance from the wall of the hole ensures that fine cuttings are carried away from the seal area, providing longer seal life. Gage protection Challenger steel tooth bits feature superior gage protection. Semi-round top inserts are strategically placed between gage teeth, and work in unison with full tooth gage hardfacing to provide additional gage and seal protection. Premium Hardfacing The tooth surfaces are fortified with premium, high-density tungsten carbide hardfacing applied by oxy-acetylene welding for superior wear resistance. Steel tooth - Sealed <strong>Roller</strong> Bearing Bit Availability BIT TYPE IADC Inches (in) Millimeters (mm) CR1G 115 16, 17 ½ 406.4, 444.5 L115 115 26, 28 660.4, 711.2 ETR1G 115 22, 23 558.8, 584.2 CR3G 135 16, 17 ½ 406.4, 444.5 ETR3G 135 16, 17 ½, 23, 26 406.4, 444.5, 584.2, 660.4 Center Jet Nozzle (J Feature)** A fourth interchangeable jet is installed in the center of the bit to reduce bit balling or provide extra flow capacity. (Available in 8 3/8” and larger bits only) Shale Diverting Insert/Shale Groove — Standard Challenger bits feature an innovative, stepped shale burn insert. This stepped design is more effective in diverting cuttings away from the seal, prolonging seal life. Diamond Enhanced Back Row (D Feature)* One third of the carbide, back-row inserts are replaced with polycrystalline diamond (PCD)-capped inserts to increase gage holding in abrasive applications. 19 * optional features available at extra cost ** optional feature (on 8 3/8” & larger bits only) available at extra cost
Page 2 and 3: T a b l e o f C o n t e n t s About
Page 4 and 5: V a r e l R o l l e r C o n e D r i
Page 6 and 7: F e a t u r e s Cutting Structures
Page 8 and 9: P r e m i u m O p t i o n s Diamond
Page 10 and 11: J o u r n a l B e a r i n g F e a t
Page 12 and 13: C h a l l e n g e r T C I - S e a l
Page 16 and 17: C h a l l e n g e r S t e e l T o o
Page 22 and 23: S t e e l T o o t h - O p e n B e a
Page 24 and 25: R o l l e r C o n e R e f e r e n c
Page 26 and 27: B i t S h i p p i n g W e i g h t s
Page 28: World Headquarters Dallas, Texas US

Roller Cone Bits - Oil & Gas Products 2006-2007 - Varel International

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