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Proceedings Paper

Fiber optic pressure and temperature sensors for oil down hole application
Author(s): Bing Qi; Gary R. Pickrell; Po Zhang; Yuhong Duan; Wei Peng; JunCheng Xu; ZhengYu Huang; Jiangdong Deng; Hai Xiao; Zhiyong Wang; Wei Huo; Russell G. May; Anbo Wang
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Paper Abstract

Detailed studies on fiber optic pressure and temperature sensors for oil down-hole applications are described in this paper. The sensor head is an interferometric based fiber optic senor in which the air-gap will change with the pressure or temperature. For high-speed applications, a novel self-calibrating interferometric/intensity-based (SCIIB) scheme, which realizes compensations for both the light source drift and the fiber loss variation, was used to demodulate the pressure (or temperature) signals. An improved white light system was developed for sensor fabrication. This system is also used as the signal demodulation system providing very high resolution. Experiment results show that the SCIIB system achieves 0.1% accuracy with a 0-8000psi working range for the pressure sensor and a 0-600 degree(s)C working range for the temperature sensor. The resolution of the white light system is about +/- 0.5 nm with a dynamic range up to 10 micrometers. The long -term testing results in the oil site are also presented in this paper.

Paper Details

Date Published: 14 February 2002
PDF: 9 pages
Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); doi: 10.1117/12.456071
Show Author Affiliations
Bing Qi, Virginia Polytechnic Institute and State Univ. (United States)
Gary R. Pickrell, Virginia Polytechnic Institute and State Univ. (United States)
Po Zhang, Virginia Polytechnic Institute and State Univ. (United States)
Yuhong Duan, Virginia Polytechnic Institute and State Univ. (United States)
Wei Peng, Virginia Polytechnic Institute and State Univ. (United States)
JunCheng Xu, Virginia Polytechnic Institute and State Univ. (United States)
ZhengYu Huang, Virginia Polytechnic Institute and State Univ. (United States)
Jiangdong Deng, Virginia Polytechnic Institute and State Univ. (United States)
Hai Xiao, Virginia Polytechnic Institute and State Univ. (United States)
Zhiyong Wang, Virginia Polytechnic Institute and State Univ. (United States)
Wei Huo, Virginia Polytechnic Institute and State Univ. (United States)
Russell G. May, Virginia Polytechnic Institute and State Univ. (United States)
Anbo Wang, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 4578:
Fiber Optic Sensor Technology and Applications 2001
Michael A. Marcus; Brian Culshaw, Editor(s)

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