Electromagnetic MWD telemetry system sets depth record offshore

Shell UK Exploration & Production, an operating unit of Royal Dutch/Shell Group, used an electromagnetic measurement-while-drilling (EM-MWD) tool to transmit downhole-measured data during drilling operations from more than 14,500 ft MD (6,400 ft TVD) in a southern North Sea well.Calgary-based Precision Drilling Corp. deployed the tool, which it calls the Precision EMpulse EM-MWD system. The companies said, in a press release, that the job sets a new world record for depth range of downhole data transmission using the electromagnetic technology offshore.The EM-MWD tool transmitted the toolface, inclination, azimuth, gamma ray, and annulus-pressure data while drilling a 6-in. horizontal-hol...

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