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E-Field MWD uses Electromagnetic Wave Propogation to
transmit downhole data to the surface. Transmission of the data is at least four
times faster than conventional MWD mud pulse systems. Data rates are such that a survey can be taken during pipe connections in less than 30 seconds. toolface updates are up to 4 second intervals. The raw magnetic vector components are transmitted when required to enable RANGING to be performed using a proprietary method, already fully tested on SAGD (Steam Assisted Gravity Drainage) well pairs.... |
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