Measurement-While-Drilling (or MWD) is a type of well logging that incorporates the measurement tools into the drillstring and provides real-time information to help with steering the drill.

What is the difference between LWD and MWD?

The key difference between LWD and measurement while drilling (MWD) is that whereas LWD data are recorded in memory and downloaded when the tools reach the surface, MWD data are transmitted up the pipe by means of a pressure wave (mud pulsing) at 3 bits/s and monitored in real time.

What is the full form of MWD?

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