Sonic well logging for characterizing earth formations

Sonic well logging methods and apparatus for processing flexural

Sonic well logging methods and apparatus utilizing dispersive wa

Stoneley radial profiling of formation shear slowness

Subsurface borehole evaluation and downhole tool position...

Subterranean surveying apparatus

Superheterodyne seismic vibrator and method

System and method for acquiring seismic and micro-seismic...

System and method for monitoring drill string characteristics du

System and method for processing acoustic signals to image behin

System and method for providing dual distance transducers to ima

System for acoustic caliper measurements

System for acoustically determining the quality of the cement bo

System for acquiring and recording signals delivered by a set of

System for detecting substructure microfractures and method ther

System for measuring shear wave travel times

System for measuring stress in downhole tubulars

System for plotting subsoil structure and method therefor

System for reducing drill string multiples in field signals