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Tricone Drillbits

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Tricone Drillbits

Drilling Project Services was the exclusive distributor of Walker McDonald tricone drillbits, until the purchase of Walker McDonald by Varel International.  We now stock the full range of Varel and Walker McDonald tricone rockbits, in particular the new Varel Ridgeback drillbits which represents the successful merger of the products of the two companies.

The Ridgeback drillbit has patented features which improve drilling penetration rates, and reduce total drilling cost.

WALKER McDONALD HDP SERIES

Diameter

SOFT

 MEDIUM HARD Pin Size Approx. Wt.
Inches mm 1 2 3 1 2 3 1 2 3 lbs kgs
6 3/4 171 HDP50 HDP60 HDP70 3 1/2 43 19.6
7 7/8 200 HDP50 HDP60 4 1/2 78 35.5
9 229 HDP50 HDP60 4 1/2 98 44.5
9 7/8 251 HDP50 HDP60 HDP70 HDP80 6 5/8 143 65.0
10 5/8 270 HDP50 HDP60 6 5/8 170 77.3
11 280 HDP60 6 5/8 173 78.6
11 3/8 290 HDP43 6 5/8 185 84.0
12 1/4 311 HDP50 HDP60 HDP70 HDP80 6 5/8 230 104.7

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