Vacuum thumper

Valve means for compressed air-powered acoustic pulse generator

Variable frequency induction well logging method and apparatus

Variable induced field compensator

Variable induced field compensator

Variable mode microwave water cut monitor and method

Variable timing zenseis

Variflux vibration transducer

Vector 3-component 3-dimensional kirchhoff prestack migration

Vector magnetic data processing

Vector migration of 1st order free-surface related downgoing...

Vehicle classification system using a passive audio input to...

Vehicle detector system with periodic source filtering

Vehicle-type discriminator

Velocity analysis on seismic data

Velocity determination of the near-surface layers in the...

Velocity model for well time-depth conversion

Velocity models for a single well and for a set of wells

Velocity selective array

Velocity stack processing of seismic data