A Study of the Statistical Properties of the Communications Channel in Acoustic Telemetry
نویسنده
چکیده
• Oil, gas, and geothermal exploration benefit from drill bit monitoring • Bits are expensive and may be damaged by high temperature or pressure • Bit orientation can be monitored to help guide bore hole • State of the art: mud modulation • Mud used to cool and lubricate drill bit • Collar near bit chokes flow to relay signal • Pressure sensor at surface decodes • Effective but slow, unidirectional, and range-limited • $3Billion/year service industry
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