Servo-driven mud pulser
作者： Terrence G. Frith
DOI:
关键词: Electrical engineering 、 Automotive engineering 、 Drill bit 、 Pilot valve 、 Battery (vacuum tube) 、 Pulse (physics) 、 Measurement while drilling 、 Normalization property 、 Electric motor 、 Engineering 、 Servo
摘要: An improved servo-driven pulser is disclosed, for use in measurement while drilling applications. In the pulser, a battery powered on-board DC electric motor used to operate servo-valve, which turn adjusts internal tool fluid pressures cause operation of main valve substantially reduce mud flow drill bit, thereby creating positive pressure pulse detectable at surface. De-energizing driving pilot results re-adjustment pressures, causing reopen, terminating pulse.
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