135345 ⎘
Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables; Apparatus for feeding the rods or cables ; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods Screw-and-nut feed mechanisms
HYDROGEOLOGICAL DRILLING-TYPE DETECTION EQUIPMENT
#2Automated pipe tripping apparatus and methods
#3Automated pipe tripping apparatus and methods
#4Automated pipe tripping apparatus and methods
#5Modular compaction boring machine system
#6Feed mechanism for drilling systems
#7Movable rotary well drilling rig
#8Right angle driving tool
#9Worm and collar drive drill rig
#10Drilling device for coal mining
#11Jointed pipe injector