Marine surveys

Marine time-lapse seismic surveying

Marine vibrator tuneable array

Marine walkaway vertical seismic profiling

Mass memory system addressing circuit

Matching P wave and shear wave sections in seismic exploration

Maximum likelihood estimation of the ratio of the velocities of

Means and method for dynamically locating positions on a marine

Means for maintaining a fixed relative orientation of two sensor

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

Measuring and modifying directionality of seismic...

Memory cement bond logging apparatus and method

Method and a device for stabilizing sources of seismic energy

Method and apparatus associated with a microcomputer system for

Method and apparatus for acoustic cement bond logging