Multi-part energizer for mechanical seal assembly
Multi-piece rotary cone drill bit seal
Multiple grade carbide for diamond capped insert
Non-circular gauge reaming row inserts
Novel cutter elements for drill bits
Nozzle assembly for an earth boring drill bit
Nozzle bore for high flow rates
Nozzle means for rotary drill bits
Nozzle orientation for roller cone rock bit
Nozzle placement in large diameter earth boring bits
Nozzle retention method for rock bits
Nozzle retention system for a drill bit
Nozzle retention system for rock bits
Nutating drill bit
O-ring seal for rock bit bearings
O-ring seal for rock bit bearings
Oil well drilling bit
One cone rotary drill bit featuring enhanced grooves
Optimal material pair for metal face seal in earth-boring bits
Optimized central PDC cutter and method