A disc cutter
A disconnect device
A down-the hole hammer
A downhole activation tool using reacting hydrogen peroxide
A downhole actuator including a sealing bellows
A downhole assembly
A downhole bearing assembly
A downhole bearing assembly
A downhole device
A downhole drift indicator
A downhole modulator apparatus
A downhole positioning system
A downhole system and an immersion hydraulic machine for...
A downhole tool for assisting in separating and reconnecting...
A downhole tool for use in a wellbore
A downhole tool including an electrically steerable antenna...
A downhole-drilling tool with high-pressure and...
A drawworks device on a drill floor
A drill bit
A drill bit assembly for fluid-operated percussion drill tools