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> Tricone drill bit, 3-3/4" steel tooth, open bearing
Tricone drill bit, 3-3/4" steel tooth, open bearing
The 1-2-1 is the fastest drilling bit produced by LSB. This bit
model is designed with long "A" shaped teeth, widely spaced
and fully hardfaced from crest to root for maximum penetration
rates in formations that range from moderately soft to
medium soft. This design is most effective in formations with
compressive strengths under 5,000, such as shale, clay, red
bed, medium limestone and unconsolidated formations. The
1-2-1 also features the absence of deletions on the gage side of
teeth on the heel row of the number two cone. This insures
maximum gage life along with tooth life in more abrasive
formations. Effective operating weights are from 1,000 to
3,000 pounds per inch of bit diameter with corresponding
rotary speeds of 200 to 50 RPM
