06588266 is referenced by 206 patents and cites 4 patents.

The present invention provides systems utilizing fiber optics for monitoring downhole parameters and the operation and conditions of downhole tools. In one system fiber optics sensors are placed in the wellbore to make distributed measurements for determining the fluid parameters including temperature, pressure, fluid flow, fluid constituents and chemical properties. Optical spectrometric sensors are employed for monitoring chemical properties in the wellbore and at the surface for chemical injection systems. Fiber optic sensors are utilized to determine formation properties including resistivity and acoustic properties compensated for temperature effects. Fiber optic sensors are used to monitor the operation and condition of downhole devices including electrical submersible pumps and flow control devices. In one embodiment, a common fluid line is used to monitor downhole parameters and to operate hydraulically-operated devices. Fiber optic sensors are also deployed to monitor the physical condition of power lines supplying high electric power to downhole equipment. A light cell disposed downhole is used to generate electric power in the wellbore, which is used to charge batteries.

Title
Monitoring of downhole parameters and tools utilizing fiber optics
Application Number
9/872591
Publication Number
6588266 (B2)
Application Date
June 1, 2001
Publication Date
July 8, 2003
Inventor
Benn Voll
Houston
TX, US
John Harrell
Waxahachie
TX, US
Michael Johnson
Flower Mound
TX, US
Brian Bidigare
Kingwood
TX, US
Paulo Tubel
The Woodlands
TX, US
Agent
Madan Mossman & Sriram P C
US
Assignee
Baker Hughes Incorporated
TX, US
IPC
E21B 47/10
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