O-ring seal for rock bit bearings
O-ring seal for rock bit bearings
O-ring seal with lubricant additives for rock bit bearings
Object manoeuvring apparatus
Oblong-shape ventilator for mine drift
Obtaining and evaluating downhole samples with a coring tool
Offset joint for downhole tools
Offset mandrel for small diameter tubing
Offset retrievable valve and apparatus
Offset stochastic control
Offshore accumulation development facility and riser pipe...
Offshore apparatus including tensioning means for a marine...
Offshore coiled tubing heave compensation control system
Offshore counterbalancing crane
Offshore drilling and/or production system
Offshore drilling rig with enclosed work area
Offshore drilling system
Offshore exploration or production operation
Offshore hydrocarbon production system
Offshore installation and method of locating on a sea- bed base