Imaging near-borehole structure using directional...

Indirect shearwave determination

Integrated well logging system and method

Interferometric means and method for accurate determination of f

Lithologic studies utilizing acoustic wave attenuation

Lithology identification using sonic data

Logging system depth recorder

Low frequency sonic logging

Machine method for determining the presence and location of hydr

Magnetic motion coupling for well logging instruments

Mapping subsurface fractures using nonlinearity measurements

Means for obtaining shear wave velocities

Measurement of corrosion with curved ultrasonic transducer, rule

Measurement of formation characteristics using acoustic borehole

Measurement of nonlinear formation parameters using sonic boreho

Measurement of nonlinear properties of formation using sonic bor

Measurement of porosity and formation factor using slow compress

Memory cement bond logging apparatus and method

Method and apparatus for acoustic cement bond logging

Method and apparatus for acoustic dipole direct shear wave well