NDLI: A high-temperature low-cost rotational speed transducer for oil-well telemetry

Content Provider	IEEE Xplore Digital Library
Author	Ambrus, D. Bilas, V. Vasic, D.
Copyright Year	2004
Description	Author affiliation: Brodarski Inst., Zagreb, Croatia (Ambrus, D.)
Abstract	The high-temperature environment of an oil-well requires reliable downhole instrumentation, typically based on simple and robust circuits, low power consumption and smart measurement algorithms. In this paper, we present an electronic design and measurement methodology for a simple, low-cost rotational speed transducer, optimized for downhole spinner-flowmeter applications and multichannel telemetry. We have developed and experimentally evaluated an effective algorithm for direction-sensitive rotational speed measurement, which combines quadrature pulse decoding with a dependant count method. The algorithm employs temperature compensation techniques, making it suitable for low-cost high-temperature circuit designs. Our preliminary results confirm reliable operation of the transducer, targeted at high-temperature, short-term oil-well logging applications.
Sponsorship	IEEE Instrumentation and Measurement Soc
Starting Page	1071
Ending Page	1074
File Size	287387
Page Count	4
File Format	PDF
ISBN	078038248X
ISSN	10915281
DOI	10.1109/IMTC.2004.1351248
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-05-18
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transducers Telemetry Velocity measurement Instruments Robustness Circuits Energy consumption Power measurement Design methodology Rotation measurement
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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