公开(公告)号：US20170336248A1

公开(公告)日：2017-11-23

申请号：US15538764

申请日：2015-12-23

Applicant: Eni S.p.A.

Inventor： Andrea GALTAROSSA ,  Luca PALMIERI ,  Massimo ZAMPATO

IPC: G01H9/00 ,  G01D5/353 ,  G01F1/66 ,  G01V11/00

CPC classification number: G01H9/004 ,  G01D5/35361 ,  G01F1/661 ,  G01V8/24 ,  G01V11/002

Abstract: A vibration measurement system and relative method to monitor multiphase flows in extraction wells or conduits, by analysis of backscattered multimode fiber light comprising: • a sensing multimode optical fiber; • an optical source, containing a high coherence laser that emits optical pulses to be sent in said sensing fiber; • a photonic lantern with 3 or more single-mode optical fiber ports and one multimode fiber port that is connected to the sensing multimode fiber; • an optical receiver, comprising a number of photodetectors equal to the number of the single-mode optical fiber ports of said photonic lantern minus 1, wherein each photodetector is connected to each of said single-mode ports; • a system for processing output signals from the optical receiver, the optical source being connected to one of the single-mode optical fiber ports and the other single-mode fibers being connected to the optical receiver. A process is also described for reconfiguring an optical reflectometry system already installed at a facility to be monitored.

公开(公告)号：US20180136036A1

公开(公告)日：2018-05-17

申请号：US15538832

申请日：2015-12-23

Applicant: Eni S.p.A.

Inventor： Andrea GALTAROSSA ,  Luca PALMIERI ,  Massimo ZAMPATO

IPC: G01H9/00 ,  G01K11/32 ,  G01D5/26 ,  G01M11/00 ,  G02B6/02

CPC classification number: G01H9/004 ,  G01D5/268 ,  G01K11/32 ,  G01K2011/324 ,  G01M11/3154 ,  G01M11/319 ,  G02B6/02319

Abstract: Reflectometric vibration measurement system to monitor multiphase flows in production wells or pipelines using multimode fibers comprising: a sensing multimode optical fiber; an optical source with at least one fiber output port, which generates optical pulses which are to be sent to the sensing fiber; an optical receiver with at least one multimode fiber input port; an optical device with at least 3 multimode fiber ports, in which one port is connected to the optical source, one port to the optical receiver, and one port to the sensing multimode fiber; a system for processing the output signals from the optical receiver, further comprising more than one spatial mode filter. A process for reconfiguring an optical reflectometry system which has already been installed in a monitoring structure is also described.