Impactor excavation system having a drill bit discharging in a cross-over pattern
US2010155063A1
Particle Drilling System Having Equivalent Circulating Density
US2009205871A1
Shot blocking using drilling mud
US2009218098A1
Methods of using a particle impact drilling system for removing near-borehole damage, milling objects in a wellbore, under reaming, coring, perforating, assisting annular flow, and associated methods
US2009126994A1
Method and system for controlling force in a down-hole drilling operation
US2009090557A1
Injection system and method comprising an impactor motive device
US2009200084A1
Apparatus for injecting impactors into a fluid stream using a screw extruder
US2008017417A1
Impact excavation system and method with suspension flow control
US2006191718A1
Impact excavation system and method with injection system
