Apparatus and method for radio frequency heating of hydrocarbona

Apparatus and methods for improved fluid displacement in...

Apparatus for dispensing chemicals into oil and gas wells

Apparatus for operating a gas and oil producing well

Apparatus for operating a gas and oil producing well

Apparatus for production of liquid from wells

Apparatus for pumping subterranean fluids

Apparatus for treating oil and gas wells

Automatic choke

Casing vacuum system

Check/relief valve for an inflatable packer system

Chemical stick storage and delivery system

Chemical treatment for liquid systems

Chemical treatment for oil wells

Cleaning and pumping apparatus for oil well production

Combination gas producing and waste-water disposal well

Compressor lift system for gas well produced liquids

Computer controlled downhole tools for production well control

Computer controlled gas lift system

Control cartridge for controlling a safety valve in an operating