First use of extended-range EM MWD in offshore, underbalanced drilling ///

For underbalanced drilling (UBD) to become more frequently used offshore, the difficulty for measuring while drilling (MWD) systems to transmit real-time pressure, directional and formation data must be overcome: A case study of how this was accomplished offshore Indonesia. The use of EM MWD in offshore applications has been limited, primarily due to the difficulty of seabed deployment of the receiving antenna.

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