6.3K views · 92 reactions | ☆☆ NEW VIDEO ☆☆ How MWD data is being transmitted to surface! . The core idea : MWD telemetry system is responsible for transmitting MWD & LWD data from BHA downhole to surface using pulsar system ... which causes restrictions in fluid flow path which in turn create pressure pulses that travel all the way thru mud (inside the drill pipe) to the surface where it can be detected and translated into useful data. | Drilling Foreman | Facebook