Download Workover Bit Brochure - Varel International

L2IADC Code 211Compressive Strengths:All Regular Circulation:Gage Types:4,000 to 10,000 (psi)2-15/16" and larger“A” ToothFormations: Wide range of medium formations such as altered limestones,shales, anhydrite and other formations with medium compressive strengths.Features: Moderately skewed cone design. Teeth hardfaced on one flankto resist abrasion. Vented “A” type gage gives high rates of penetration.L1IADC Code 321Compressive Strengths:All Regular Circulation:Gage Types:8,000 – 18,000 (psi)3-1/2" and larger“A” ToothFormations: Specifically designed for fast penetration in formations thatare hard, but not particularly abrasive.Features: Designed to conform to latest drilling techniques requiringheavier weights. Similar in design to the LH1, but does not havewebbed heel row.LH1IADC Code 331Compressive Strengths:All Regular Circulation:Gage Types:9,000 – 20,000 (psi)2-7/8" and larger“U” ToothFormations: Hard formations, such as pyrite, chert, dolomites, graniteporphyry and other formations which have high compressive strengthsand are abrasive.Features: Closely spaced, strong short teeth for maximum crushingand chipping.www.varelintl.com