Method and apparatus for determining distance for magnetic and e

Method and apparatus for determining the azimuth of a borehole b

Method and apparatus for determining the direction to a metal-ca

Method and apparatus for exploration using GMR sensors

Method and apparatus for geophysical exploration using GMR senso

Method and apparatus for locating well casings from an...

Method and apparatus for measuring distance and direction by mov

Method and apparatus for measuring distance and direction by mov

Method and apparatus for metal detection employing digital...

Method and apparatus for predicting the occurrence of an earthqu

Method and device for determining the location of a rod...

Method and equipment for noise-reduction when detecting a target

Method and system for measuring displacement of buried fluid tra

Method for compensating drill pipe and near-borehole effect...

Method for detecting a magnetic source by measuring the magnetic

Method for determining the location of a deep-well casing by mag

Method for drilling a borehole from one cased borehole to anothe

Method for locating underground fluid sources

Method for magnetically detecting a localized disturbance of the

Method for obtaining magnetic dipole density image data of subte