Dual pump floating layer recovery apparatus
Electro hydraulic downhole control device
Electro-hydraulic surface controlled subsurface safety valve...
Electronically controlled electric wireline setting tool
Engine speed control for hoist and tongs
Fire-safe surface-controlled subsurface safety valve control lin
Fluid spill catching, containing, collection and recovery system
Full automatic machine for oil extraction
Gas and oil well controller
Gas well controller system
High pressure automatic kelly valve
High pressure automatic mud saver valve
Ignition system for an automatic burner for in situ combustion f
Intermittent well controller
Leak detection system and control using non-rigid bladder
Level sensor
Level sensor
Liquid skimmer apparatus
Material sensitive downhole flow control device
Method and apparatus for recovering and transporting methane...