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

Method and apparatus for acoustic dipole shear wave well logging

Method and apparatus for acoustic logging

Method and apparatus for acoustic logging

Method and apparatus for acoustic well logging

Method and apparatus for acoustic well logging

Method and apparatus for acoustic well logging

Method and apparatus for acoustic well logging

Method and apparatus for acoustically investigating a borehole c