135186 ⎘
Special methods or apparatus for drilling Applying separate balls or pellets by the pressure of the drill, so-called shot-drilling
Projectile Drilling Systems and Methods
#2Projectile drilling system
#3Boring assembly and associated boring method
#4Projectile drilling systems and methods
#5Particle drilling method
#6Augmented drilling system
#7Projectile drilling system
#8Ram accelerator system with rail tube
#9Impactor excavation system having a drill bit discharging in a cross-over pattern
#10Particle Drilling System Having Equivalent Circulating Density
#11Impact excavation system and method with particle separation
#12Injection system and method comprising an impactor motive device
#13Drill bit
#14Impact excavation system and method with improved nozzle
#15System for generation of thermal energy