Drill bit instrumentation and method for controlling drilling or
Drill pipe monitoring system
Drill pipes and casings utilizing multi-conduit tubulars
Drill rate calculator
Drill string shutoff valve
Drill with motor drive and feed
Drilling components and systems to dynamically control...
Drilling enhancement tool
Drilling equipment and a method for regulating its penetration
Drilling fluid flow diverter
Drilling fluid flow monitoring system
Drilling method and apparatus
Drilling optimization searching and control apparatus
Drilling optimization searching and control method
Drilling process and apparatus
Drilling process monitor
Drilling system
Drilling system
Drilling system and flow control apparatus for downhole drilling
Drilling system and method