Blade drilling bits for drilling with washing d = 112 - 295.3 mm

Blade drilling bits for noncore well drilling with washing in grounds of the I-V categories on drilling capacity with inclusions of detrital material of stronger rocks. Bits are equipped with cutters, reinforced by hard-alloy inserts for drilling in grounds of various categories:

  • cutters of "M" type - for grounds of the I-III categories on drilling capacity;
  • cutters of "MС" type - for grounds of the II-IV categories on drilling capacity;
  • cutters of "С" type - for grounds of the III-V categories on drilling capacity.

Bits are equipped with calibrating tools in the form of hard-alloy inserts for prevention of wellbore narrowing.
Working surfaces of blades are protected from abrasive wear by building up of a hard alloy.
Blade bits provide mechanical drilling speeds exceeding by 2.5 times of drilling speeds with rolling drilling bits at more than 10 times decrease of necessary axial stress on the rock cutting tool; have the increased wear resistance thanks to strengthening by hard-alloy inserts and building up; have the increased maintainability thanks to possibility of replacement of cutters directly in field conditions.

Name Diameter of the bit, mm Torgue, max., kgf*m Recommended axial stress, kN
Three- blade drilling bit DL-112 112 2000 10 Order
Three- blade drilling bit DL-132 132 2000 8.5 Order
Three- blade drilling bit DL-146 146 2000 10 Order
Three- blade drilling bit DL-190, 5 190.5 2000 10 Order
Three- blade drilling bit DL-215,9 215.9 1200 22 Order
Blade drilling bit DL-215,9 244.5 2000 12 Order
Blade drilling bit DL-295,3 295.3 2000 15 Order

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