Course Scope

This short course provides participants with the advanced knowledge on the current industry practices on drill bit design, optimization, and selection for enhanced drilling performance. It is aimed at developing the required skills of the participants needed for the understanding of the differences among the various drill bits available and the selection of the best bit during rotary drilling operation in the oil and gas industry.



At the end of the course, participants will be able to:

  1. Identify different bit types
  2. Select the most suitable drill bit for certain applications
  3. Identify the applications that are not suitable to other bit types
  4. Describe a proper dull grading which will benefit the operations


  Introduction to Drill Bits: (1 day)

  • PDC terminology
  • PDC cutters
  • PDC design criteria: cutter size, back rake, blade count, bit profile
  • Roller cone terminology
  • IADC
  • Krevs
  • Journal angle and offset
  • Inserts
  • PDC depth of cut control
  • PDC gauge pad
  • PDC updrill
  • Multi-level force balancing

  Dull Grading PDC & Roller Cone Bits: (1 day)

  • Purpose of the system
  • 8-digit system structure
  • Guidelines for consistency
  • Dull characteristics
  • Potential causes
  • Dull grading exercise

  Bit Hydraulics: (1 day)

  • Critical hydraulics functions for PDC & roller cone bits
  • Horsepower per square inch (H.S.I)
  • Total flow area (TFA)
  • Nozzle configuration
  • Hydraulics optimization goals
  • Circulation system requirements & limitation
  • Flow rate & standpipe pressure limitations
  • Drillstring/BHA component requirements
  • Annulus pressure requirements
  • Hydraulics calculations
  • Computational fluid dyamics

  Bit Selection: (1 day)

  • Offset bit records
  • Mud log (lithology)
  • Formation hardness
  • Dull bit photos
  • Proposing bit solution