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→Data acquisition
==Data acquisition==
==Data acquisition==
[[file:measurement-while-drilling_fig1.png|left|thumb|{{figure number|1}}Location of MWD hardware (not drawn to scale). (From <ref name=pt03r5>Anadrill,, 1988, Measurement While Drilling-Formation Logging System service brochure, 2000(A-4/89).</ref>.)]]
[[file:measurement-while-drilling_fig1.png|300px|thumb|{{figure number|1}}Location of MWD hardware (not drawn to scale). (From <ref name=pt03r5>Anadrill,, 1988, Measurement While Drilling-Formation Logging System service brochure, 2000(A-4/89).</ref>.)]]
Downhole MWD hardware consists of sensors built into a drill collar positioned near the bit ([[:file:measurement-while-drilling_fig1.png|Figure 1]]). Electrical energy for the system is provided by a battery pack or generated by a small turbine.
Downhole MWD hardware consists of sensors built into a drill collar positioned near the bit ([[:file:measurement-while-drilling_fig1.png|Figure 1]]). Electrical energy for the system is provided by a battery pack or generated by a small turbine.