Antenna construction for well logging of subsurface earth format

Antenna structures for electromagnetic well logging tools

Antennas for deep induction array tools with increased...

Anti-falsing and zero nulling search head for a metal detector

Apparatus accurately measuring properties of a formation

Apparatus adapted for single pulse electromagnetic measurements

Apparatus allowing continuous radio detection of underground...

Apparatus and method employing extraneous field compensation for

Apparatus and method for combined acoustic and seismoelectric lo

Apparatus and method for detecting a weak induced magnetic field

Apparatus and method for detecting an underground cable...

Apparatus and method for detecting magnetically detectable plast

Apparatus and method for detecting the location of metallic obje

Apparatus and method for detecting underground liquids

Apparatus and method for determination of bound water in subsurf

Apparatus and method for determination of subsurface permittivit

Apparatus and method for determination of subsurface permittivit

Apparatus and method for determining dip and/or anisotropy of fo

Apparatus and method for determining directional characteristics

Apparatus and method for determining parameters of formations su