The Rotating Magnet Ranging System (RMRS) is a stand-alone active magnetic ranging tool providing independent proximity measurements free from the inaccuracies inherent in standard magnetic and gyro surveying methods.
A compact magnetic sub located directly behind the drill bit generates an AC magnetic wave form when rig pumps are activated and mud is flowing. This signal is detected by sensors in an adjacent well or HDD pilot bore, at a range of >300 ft. By verifying target location early, the driller is given adequate time to make even significant changes in trajectory. Thus, the intersection of casing as small as 4 inches in diameter is possible, without the need for a costly passby and sidetrack, saving rig time and controlling project costs.