Valve with integral closure and seat carrier unit
Valve with secondary load bearing surface
Valve within a control line
Valve within a control line
Valve-controlled downhole motor
Valved percussion-type drill bit
Valved plug for packer
Valveless pneumatic hammer
Valves
Valves
Valves
Valves for use in wells
Valves for use on a telescopic rock drill mounting
Valving system for inflatable packers
Vapor collection and barrier systems for encapsulated...
Vapor process system
Vapour extraction of hydrocarbon deposits
Variable angle bent sub for directional drilling
Variable angle elbow fitting for deviated well drilling
Variable bore packer for a ram type blowout preventer