terms:measurements_while_drilling
MWD. A wireless system for making downhole measurements of azimuth, inclination, and tool facing from sensors mounted inside of a nonmagnetic drill collar located near the drill bit. Formation properties can be measured, such as: natural radioactivity, resistivity, and temperature. These measurements are sent to the surface by means of pressure pulses induced in the drilling mud by a mud-pulse transmitter, or stored downhole and brought to the surface when the bit and MWD collar are brought out of the hole.
terms/measurements_while_drilling.txt · Last modified: 2023/11/22 08:41 by 127.0.0.1