| Patent application number | Description | Published |
|---|
| 20120206718 | Stimulated Brillouin System with Multiple FBG's - A Brillouin system for monitoring both temperature and strain includes either a single or double-ended fiber with multiple fiber Bragg gratings (FBG's) at different wavelengths and a pumped seed laser system tunable over a range substantially larger than a Brillouin shift. The FBG's are distributed along the length of the deployed fiber and serve as wavelength selectable reflectors that enable maintaining system operation even in the case of a fiber break. | 08-16-2012 |
| 20120250722 | Calibrated Fire Detection Cable - A system and method for providing greatly improved linear heat detection using fiber optic distributed temperature systems (DTS). The invention makes use of correction algorithms based on proportional-integral-derivative notions that anticipate exterior temperature increases based on the rate of measured temperature changes. | 10-04-2012 |
| 20130003777 | Multi Wavelength DTS Fiber Window with PSC Fiber - A DTS system resistant to hydrogen induced attenuation losses during the service life of an installation at both low and high temperatures using matched multi-wavelength DTS automatic calibration technology in combination with designed hydrogen tolerant Pure Silica Core (PSC) optical fibers. | 01-03-2013 |
| 20130042415 | Mitigation of Radiation Induced Attenuation - A DTS system resistant to radiation induced attenuation losses during the service life of an installation at both low and high temperatures using matched multi-wavelength distributed temperature sensing automatic calibration technology in combination with designed Pure Silica Core (PSC) optical fibers and an in process photo bleaching method provided by the light sources of the distributed temperature sensing system. | 02-21-2013 |
| 20130209029 | Spectral Broadening for DTS Application - An apparatus and method for use in distributed temperature sensing (DTS) systems to reduce coherent Rayleigh scattering in fiber optic cables by using photonic crystal fibers. | 08-15-2013 |
| 20130315552 | Attachment Method to Keep Optical Fiber in Tension - A method using a capstan device and different bonding methods for minimizing undesirable time-dependent effects that occur in sensing devices that use optical fibers placed in tension. | 11-28-2013 |
| 20140105533 | Method to Install Sensing Cables in Monitoring Wells - A tubular seismic sensing cable for use in wells and a method of deployment into wells to provide higher seismic sensitivity. | 04-17-2014 |
| 20140139226 | OPTICAL PUSH-PULL INTERFEROMETRIC SENSORS FOR ELECTROMAGNETIC SENSING - A method of measuring an electromagnetic field in a formation can include installing an electromagnetic sensor with improved sensitivity, the sensor including multiple optical waveguides and respective multiple materials, and in response to exposure to the electromagnetic field, the materials changing shape in opposite directions. A well system can include an optical electromagnetic sensor which measures an electromagnetic field in a formation, and wherein optical path lengths or phases in optical waveguides of the sensor change both positively and negatively in response to exposure to the electromagnetic field. A method of monitoring a formation can include installing an optical electromagnetic sensor in a wellbore which penetrates the formation, and an optical path length/phase in an optical waveguide of the sensor increasing in response to exposure to the electromagnetic field, and an optical path length/phase in another optical waveguide of the sensor decreasing in response to exposure to the electromagnetic field. | 05-22-2014 |
| 20140208821 | In-Situ System Calibration - A method for re-calibrating installed downhole sensors used in hydrocarbon wells by the application of a calibration string inserted in the wells and deployed in close proximity to the installed downhole sensor. | 07-31-2014 |
| 20140219620 | Fiber Splice Housing with Temperature Compensation - A method and device for relieving thermal stresses on the optical fibers in fiber optic splice housings used in hostile thermal environments. | 08-07-2014 |
| 20140230229 | Coiled Tubing Servicing Tool - A coiled tubing servicing system comprising a servicing cart comprising two or more support frames, a length of coiled tubing supported by the servicing cart, a servicing fixture disposed about a portion of the length of coiled tubing adjacent the servicing cart, wherein the servicing fixture is movable along a longitudinal axis of the length of coiled tubing and radially about the longitudinal axis of the length of coiled tubing; and a servicing tool coupled to the servicing fixture. | 08-21-2014 |
| 20140230232 | Method and Device for Installing Multiple Fiber Optic Cables in Coiled Tubing - A method for installing multiple fiber optic cables in coiled tubing in oil and gas operations. | 08-21-2014 |
| 20140230233 | Method for Installing Multiple Sensors in Coiled Tubing - A method for installing multiple fiber optic cables in coiled tubing in oil and gas operations. | 08-21-2014 |
| 20140231066 | Coiled Tubing System with Multiple Integral Pressure Sensors and DTS - A multiple integral pressure transducer system for installation in oil field downhole coiled tubing systems. | 08-21-2014 |
| 20140260588 | Flow Sensing Fiber Optic Cable and System - A system and method for monitoring oil flow rates at multiple points in production wells using a flow sensing fiber optic cable. An illustrative system embodiment includes: a fiber optic sensing system housed within a tube suitable for a downhole environment; and a flow to signal conversion device attached to the tube and deployed in the oil flow. | 09-18-2014 |
| 20140285793 | DISTRIBUTED STRAIN AND TEMPERATURE SENSING SYSTEM - A downhole optical sensing system can include an optical fiber positioned in the well, the optical fiber including multiple cores, and one of the cores having a Brillouin scattering coefficient which is different from another one of the cores. A method of sensing strain and temperature as distributed along an optical fiber can include measuring Brillouin scattering in a core of the optical fiber disposed in a well, and measuring Brillouin scattering in another core of the optical fiber disposed in the well, the optical fiber cores being exposed to a same strain and temperature distribution in the well. | 09-25-2014 |
| 20140285795 | DOWNHOLE MULTIPLE CORE OPTICAL SENSING SYSTEM - A downhole optical sensing system can include an optical fiber positioned in the well, the optical fiber including multiple cores, and at least one well parameter being sensed in response to light being transmitted via at least one of the multiple cores in the well. The multiple cores can include a single mode core surrounded by a multiple mode core. A method of sensing at least one well parameter in a subterranean well can include transmitting light via at least one of multiple cores of an optical fiber in the well, the at least one of the multiple cores being optically coupled to a sensor in the well, and/or the at least one of the multiple cores comprising a sensor in the well, and determining the at least one well parameter based on the transmitted light. | 09-25-2014 |
| 20140285875 | REMOTE PUMPED DUAL CORE OPTICAL FIBER SYSTEM FOR USE IN SUBTERRANEAN WELLS - A downhole optical system can include an optical fiber disposed in a subterranean well, and an optical fiber amplifier which amplifies optical power in a core of the optical fiber in the well, the amplifier being optically pumped with optical power in another core of the optical fiber in the well. Another downhole optical system can include an optical fiber disposed in a subterranean well, the optical fiber comprising multiple cores, and an optical fiber amplifier comprising multiple cores optically coupled respectively to the optical fiber multiple cores in the well. | 09-25-2014 |
| 20140327919 | Remote Seal for Pressure Sensor - A system for sensing downhole pressure in in a hydrocarbon well using a Fabry-Perot (F-P) sensor in series with a Fiber Bragg Grating and maintaining the back pressure on the sensor system with a surface sealing system and a surface pressure control system. | 11-06-2014 |
| 20140362431 | Generating Broadband Light Downhole For Wellbore Application - Generating broadband light downhole for wellbore application. A laser source is configured to reside outside a wellbore and produce a seed light pulse at a first wavelength spectrum. A converter is configured to be received inside the wellbore, remote from the laser source. The converter receives the seed light pulse at the first wavelength spectrum through one or more fiber optic cables, and generates light at a second wavelength spectrum that has a broader range than the first wavelength spectrum. | 12-11-2014 |
| 20140363117 | Fiber Optic Sensing System with Hydrogen Flush - A system and method for controlling hydrogen concentration in optical sensing systems in subsurface wells. In an exemplary system the downhole optical fiber sensors are positioned within nested conduits and a controlled concentration hydrogen gas is flowed in a first direction through the first conduit, and flowed in a second direction through the annulus, wherein the second direction is opposite to the first direction. | 12-11-2014 |
| 20150013970 | Sand Control Screen Assembly with Internal Control Lines - Disclosed are sand control screens and completion assemblies that receive, retain, and protect control lines during installation and operation thereof. One disclosed completion assembly includes a base pipe, at least one screen jacket positioned around the base pipe and operable to prevent an influx of particulate matter of a predetermined size therethrough, a control line housing arranged uphole from the at least one screen jacket and having a fiber optic splicing block disposed therein, the at least one fiber optic splicing block being communicably coupled to a control line that extends uphole from the control line housing, and one or more hydraulic conduits arranged longitudinally between the at least one screen jacket and the base pipe and extending from the control line housing. | 01-15-2015 |
