Downhole sensing with fiber in exterior annulus
September 9, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesApparatus for enhancing strain in intrinsic fiber optic sensors and packaging same for harsh environments Multi-parameter fiber optic sensor for use in harsh environments Oil and gas well packer having fiber optic Bragg Grating sensors for downhole insitu inflation monitoring Washer having fiber optic Bragg Grating sensors for sensing a shoulder load between components in a drill string Fiber optic sensing system Apparatus for the remote measurement of physical parameters High sensitivity fiber optic pressure sensor for use in harsh environments Disposable telemetry cable deployment system Select trigger and detonation system using an optical fiber Multiplexed fiber optic transducer for use in a well and method InventorsAssigneeApplicationNo. 10237470 filed on 09/09/2002US Classes:250/269.1, With source and detector250/227.14, Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell)250/227.27, With coherent interferrometric light250/256, Well testing apparatus and methods166/250.01, With indicating, testing, measuring or locating166/254.2, Well logging73/705, Photoelectric385/12, OPTICAL WAVEGUIDE SENSOR356/73.1, FOR OPTICAL FIBER OR WAVEGUIDE INSPECTION175/40, WITH SIGNALING, INDICATING, TESTING OR MEASURING102/201, Laser or light initiated340/853.1WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.)ExaminersPrimary: Lee, John D.Assistant: Gurzo, Paul M. Attorney, Agent or FirmForeign Patent References
International ClassesG01V 800E21B 4700 AbstractA portion of at least one fiber is moved into an exterior annulus of a well between a tubular structure in the well and the wall of the borehole of the well such that the portion is placed to conduct a signal responsive to at least one parameter in the exterior annulus. One particular implementation uses fiber optic cable with a cementing process whereby flowing cementing fluid pulls the portion of the cable into the exterior annulus.Field of SearchWith source and detectorCondition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell) With coherent interferrometric light Well testing apparatus and methods With indicating, testing, measuring or locating OPTICAL WAVEGUIDE SENSOR | |
