Apparatus and method for measuring buried ferromagnetic objects

Apparatus for detecting a magnetic anomaly contiguous to remote

Apparatus for predicting earthquakes and other terrestrial...

Bobbin for a magnetic sensor

Borehole fracture detection using magnetic powder

Determining beacon location using magnetic field ratios

Device for automatically compensating the magnetism of drill str

Earthquake detecting magnetometer with movable magnetic compass

Electromagnetic homing system using MWD and current having a fun

Electromagnetic induction coil sensor

Enhanced passive ranging methodology for well twinning

Ferrous target identification system with magnetic field polarit

Geomagnetic prospecting method with measurements obtained during

Hole displacement measuring system and method using a...

Installation and process for measuring remanent magnetization of

Locating system for finding magnetic objects in the ground inclu

Magnetic anomaly detection buoy for detecting submarines

Magnetic anomaly homing system and method using magnetic...

Magnetic anomaly homing system and method using rotationally...

Magnetic anomaly sensing system and methods for maneuverable...