Annular shaped power charge for subsurface well devices

Apparatus for connecting jars to a downhole tool

Apparatus for plugging a wellbore in high impulse fracturing

Apparatus for producing fractures and gaps in geological formati

Apparatus for retrieving drill collars

Chemical cutting apparatus having selective pressure bleed-off

Device for stimulating a subterranean formation

Downhole mobility and propulsion apparatus

Emergency release tool

Gas generator with improved ignition assembly

Gas lift apparatus for a well

High-energy gas fracture apparatus for through-tubing...

Igniter for detonating an explosive gas mixture within a well

Inflatable gas bag for use as a borehole plug

Method and apparatus for downhole safety valve remediation

Non-explosive power charge ignition

Oil well stimulation apparatus

Packer

Perforating gun brake

Propellant cartridge with restrictor plugs for fracturing wells