Measurement while drilling
The following are general facts about MWD:
- MWD allows the driller to 'Steer' the BHA to follow a planned trajectory.
- The instruments in the BHA tell him direction, inclination and toolface.
- The instruments are powered by batteries or a mud turbine
- The data is converted to binary and transmitted up a hole by shutting and opening a mud valve.
- The pressure shocks represent 1s and 0s and are measured at surface for conversion to data.
Prof. Angus Jamieson: Measurement while drilling
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Prof. Angus Jamieson: Measurement while drilling
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