Metalliferous objects detector having a pair of angularly positi

Methd of logging an earth formation penetrated by a borehole to

Method and a tool for electrically investigating a wall of a...

Method and apparatus employing phase cycling for reducing...

Method and apparatus for a downhole antenna

Method and apparatus for a multi-component induction...

Method and apparatus for a multi-component induction...

Method and apparatus for a quadrupole transmitter for...

Method and apparatus for a quadrupole transmitter for...

Method and apparatus for accurately measuring properties of...

Method and apparatus for avoiding mutual coupling between receiv

Method and apparatus for azimuthal electromagnetic well...

Method and apparatus for azimuthal resistivity measurements...

Method and apparatus for balancing the electrical output of the

Method and apparatus for borehole wall resistivity imaging...

Method and apparatus for broadband measurement of dielectric pro

Method and apparatus for calibrating the output measurement of a

Method and apparatus for cancellation of borehole effects...

Method and apparatus for cancellation of borehole effects...

Method and apparatus for cancelling powerline noise in geophysic