Energy source for use in seismic acquisitions

Exciting method for logging by S wave

Expanding detonation chamber multi-shot gas exploder

External air release control in seismic air gun

External bubble-suppression method and apparatus

Fail-safe circuit mechanism for generating a pulse indicating th

Fail-safe mechanism for generating a pulse indicating the precis

Fail-safe methods for generating a pulse indicating the precise

Fast cycle seismic gas exploder and method

Finding distance to blowout using wellbore acoustic measurements

Firing device, explosive charge, method, and system, for seismic

Flexcompressional acoustic transducer

Flexible marine seismic source

Fluid actuated acoustic pulse generator

Fluid driven torsional dipole seismic source

Fluid operated seismic generator

Fluidic repeater

Focused planar transducer

Fracture detection using circumferential offset acoustic paths

Full flow solenoid valve for air gun operation