Formation imaging while drilling in non-conductive fluids

Formation resistivity measurement sensor contained onboard a...

Formation resistivity measurements from within a cased well used

Formation resistivity measurements from within a cased well used

Frequency dependent pulsed gain modulated concealed structure lo

Frequency dependent pulsed gain modulated metallic object detect

Frequency domain electromagnetic geophysical mapping...

Galvanic method of measuring electrical anisotropy

Geomagnetic prospecting method with measurements obtained during

Geophysical methods and apparatus for determining the hydraulic

Geophysical prospecting apparatus utilizing pulsed electromagnet

Geophysical prospecting with collimated magnetotelluric fields

Ground control unit for cable locating

Ground global tomography (CGT) using modulation of the ionospher

Ground mineralization rejecting metal detector (power saving)

Ground mineralization rejecting metal detector (receive...

Ground mineralization rejecting metal detector (transmit...

Ground piercing metal detector having range, bearing and...

Ground piercing metal detector method for detecting the...

Ground prospecting method utilizing electrical resistivity measu