GEOLOGICAL BORING L.L.C.


Duro Bore
all soils bit

dbore100.jpg (22221 bytes)

Designed for adverse geologies: cobbles, fractured shales,
cobbles, caliche and compacted soils

  11-18 degree steering angles.

  Designed for long life in production drilling application.

  Replaceable fluid nozzles.

  Heat treated tool steel body - Resists abrasion!

  Solid tungsten carbide cutting edges.

  Available in 4", 5", 6" & 8" diameters.


  Part Number   Diameter (Inches)   Steering Flat   Threads
  D279   4.0"   12 Degrees   2 API  I.F. Pin
  D208   4.0"   12 Degrees   2-3/8 API Reg Pin
  D271   5.0"   14 Degrees   2-3/8 API Reg Pin
  D211   6.0"   11 Degrees   2-3/8 API Reg Pin
  D309   6.0"   11 Degrees   2-7/8 API Reg Pin
  D206   6.0"   11 Degrees   3-1/2 API Reg Pin
  D270   8.0"   21 Degrees   3-1/2 API Reg Pin
  D257   8.0"   18 Degrees   4-1/2 API Reg Pin

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"When the others can't make the cut!"    newlogo.jpg (26691 bytes)

Copyright 1999 Geological Boring L.L.C.  All rights reserved.
Revised: March 15, 1999.