Diamond drilling bits [slaid]/

Míreanna comhchosúla

• The bit
  de réir: University of Texas. Petroleum Extension Service
  Foilsithe / Cruthaithe: (1976)
• The bit /
  de réir: Leecraft, Jodie, et al.
  Foilsithe / Cruthaithe: (1981)
• Roller-cone bits [slaid]
  Foilsithe / Cruthaithe: (1977)
• Rotary, kelly and swivel
  de réir: University of Texas. Petroleum Extension Service
  Foilsithe / Cruthaithe: (1966)
• An investigation into the percussive drill bit penetration of rock /
  de réir: 322463 Mustapha Kamal Shahrom