| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 340854700 | Optical link (e.g., waveguide, etc.) | 21 |
| 20080272931 | Method and Apparatus for Measuring a Parameter within the Well with a Plug - The invention provides a system for measuring a parameter within a well comprising: a first apparatus comprising a first reel of first wound optic fiber line (or fiber) able to be unwound from the first reel, at least a first sensor able to measure the parameter of the well, wherein information on said parameter can be transmitted trough the first optic fiber; a second apparatus comprising a second reel of second wound optic fiber line able to be unwound from the second reel, an extremity of the second optic fiber being fixed to a reference point; a light transmitter or receiver device linked to the reference point and able to generate or detect a light pulse through the second optic fiber line; and means to exchange said light pulse between first and second optic fiber line. | 11-06-2008 |
| 20100194586 | Methods and systems for borehole telemetry - Methods and systems for borehole telemetry utilizing a tool configured or designed for deployment in a borehole traversing a subterranean formation. The tool includes a downhole telemetry module; a surface telemetry module; and a datalink between the downhole and surface modules configured or designed for transferring data over one or more data communication channels utilizing at least one telemetry scheme selected from a plurality of telemetry schemes based on at least one downhole parameter. | 08-05-2010 |
| 20110181436 | COMMUNICATIONS CONNECTION IN A SUBSEA WELL - A communication connection in a subsea well for converting an optical signal from an optical fiber to an electrical signal, comprising a small form factor pluggable device. | 07-28-2011 |
| 20120154168 | PHOTONIC CRYSTAL WAVEGUIDE DOWNHOLE COMMUNICATION SYSTEM AND METHOD - A downhole component includes a body portion and a photonic crystal waveguide coupled to the body portion that is configured to receive a signal from a device. | 06-21-2012 |
| 20120200422 | Use of Digital Transport Delay to Improve Measurement Fidelity in Swept-Wavelength Systems - A method and apparatus for obtaining a parameter of interest from an optical device placed along a fiber optic cable in a wellbore is disclosed. Light is propagated a light through the fiber optic cable from a light source. A first detector receives a first signal responsive to interaction of the propagated light and the optical device, wherein the first signal has a delay. A second detector receives a second signal and a digital delay device delays the received second signal. A sampling device obtains a selected signal from the first signal using the delayed second signal, and a processor determines the parameter of interest using the selected signal. | 08-09-2012 |
| 20120218119 | Downhole Telemetry System Using an Optically Transmissive Fluid Media and Method for Use of Same - A multi-channel downhole telemetry system for enabling communication in a wellbore. The system includes a downhole transmitter operable to optically transmit a first data stream on a first optical channel and a second data stream on a second optical channel. A downhole receiver is operable to receive the first data stream and the second data stream. An optically transmissive fluid disposed in the wellbore provides a medium for the optical transmission of the first data stream and the second data stream between the downhole transmitter and the downhole receiver. The optically transmissive fluid contains suspended solids having refraction surfaces that scatter the optically transmitted data streams in the wellbore. | 08-30-2012 |
| 20120268288 | ARCNET USE IN DOWNHOLE EQUIPMENT - An apparatus and method for delivering communication and/or power downhole. The apparatus may include an information network configured to use a multi-drop deterministic protocol. The method may include delivering information over the information network. The method may include delivering power over the information network. | 10-25-2012 |
| 20130093598 | ENHANCING FUNCTIONALITY OF REFLECTOMETRY BASED SYSTEMS USING PARALLEL MIXING OPERATIONS - A method for estimating a parameter includes: generating an optical signal, the optical signal modulated via a modulation signal; transmitting the modulated optical signal from a light source into an optical fiber, the optical fiber including a plurality of sensing locations disposed along the optical fiber and configured to reflect light; receiving a reflected signal including light reflected from the plurality of sensing locations; and combining, in parallel, each of a plurality of reference signals with the reflected signal to estimate a value of the parameter. | 04-18-2013 |
| 20130093599 | INCOHERENT REFLECTOMETRY UTILIZING CHAOTIC EXCITATION OF LIGHT SOURCES - A method for estimating a parameter includes: transmitting a control signal to a coherent optical source, the control signal configured to chaotically vary an output of the optical source and generate a chaotically excited optical signal; transmitting the optical signal from the optical source into an optical fiber, the optical fiber including at least one sensing location; receiving a reflected signal including light reflected from the at least one sensing location; and estimating a value of the parameter using the reflected signal. | 04-18-2013 |
| 20130099935 | Light Based Communication Port For Use On Downhole Tools - A wellbore measurement instrument includes a housing configured to move along an interior of a wellbore. At least one sensor configured to measure a wellbore parameter is disposed in the housing. A controller disposed in the housing. The controller including at least one of a data storage device and a device to control operation of the at least one sensor. A first optical communications port is disposed in a first aperture in the housing. The first optical communications port includes an electrically operated light source. The first aperture in the housing is sealingly closed by a port plug having an optically transparent window therein. The port plug is configured to resist entry of wellbore fluid into an interior of the housing. | 04-25-2013 |
| 20130249705 | CASING COLLAR LOCATOR WITH WIRELESS TELEMETRY SUPPORT - Disclosed are wireline tool systems including a casing collar locator tool and one or more logging tool(s). The logging tool(s) collects information regarding a formation property or a physical condition downhole, and produces a modulated magnetic field to communicate at least some of the collected information. The casing collar locator tool includes a light source and a sensor. The light source transmits light along an optical fiber in accordance with a sensor signal. The sensor produces the sensor signal in response to magnetic field changes attributable to passing collars in a casing string, and to the modulated magnetic field produced by the logging tool(s). Related telemetry methods are also described. | 09-26-2013 |
| 20140111348 | Downhole Time Domain Reflectometry with Optical Components - A disclosed system for downhole time domain reflectometry (TDR) includes a surface electro-optical interface, a downhole electro-optical interface, a fiber-optic cable that couples the surface electro-optical interface and the downhole electro-optical interface, and an electrical transmission line that extends from the downhole electro-optical interface into a wellbore environment to enable TDR operations. A described method for downhole TDR includes transmitting an optical signal to a downhole environment, converting the optical signal to an electrical signal in the downhole environment, reflecting the electrical signal using an electrical transmission line in the downhole environment, analyzing data corresponding to the reflected electrical signal, and displaying a result of the analysis. | 04-24-2014 |
| 20140167972 | ACOUSTICALLY-RESPONSIVE OPTICAL DATA ACQUISITION SYSTEM FOR SENSOR DATA - A sensing and data acquisition system may provide a sensing assembly including a signal conditioner to receive an electrical signal from a sensor affixed onto an asset and supply an encoded digital representation of a sensed parameter. An acoustic modem may be connected to the signal conditioner to receive the encoded digital representation of the sensed parameter and transmit an acoustic signal based on the encoded digital representation of the sensed parameter. A data acquisition line may be proximate to the asset and may be non-contactively coupled to the sensing assembly. The data acquisition line may include an optical fiber acoustically coupled to the acoustic modem and responsive to the encoded digital representation of the sensed parameter transmitted by the modem to effect an optical change in an acoustically-responsive portion of the fiber. The optical change may be measurable to detect the encoded digital representation of the sensed asset parameter. | 06-19-2014 |
| 20140203946 | OPTICAL WELL LOGGING - A method of logging a well can include conveying an optical waveguide and at least one signal generator with a conveyance into the well, causing the signal generator to generate at least one signal in the well, and receiving the signal as distributed along the optical waveguide. A well logging system can include a conveyance with an optical waveguide, and at least one signal generator which is conveyed by the conveyance into a well with the optical waveguide, whereby the signal generator generates at least one signal received with the optical waveguide. | 07-24-2014 |
| 20140292530 | Systems and Methods for Hybrid Cable Telemetry - Systems, apparatuses, and methods for hybrid cable telemetry. The methods can include positioning a toolstring in a wellbore. The toolstring can include an uphole telemetry cartridge and a downhole telemetry cartridge respectively adapted to send and receive telemetry data. The toolstring can also include a hybrid logging cable having optical fibers and copper conductors that can operatively couple the uphole telemetry cartridge to the downhole telemetry cartridge. The method can also include transferring data between the uphole telemetry cartridge and the downhole telemetry cartridge across the optical fibers and the copper conductors. The method can further include measuring a data transmission rate on the optical fibers and the copper conductors. The method can also include comparing the data transmission rate to a predetermined threshold. The method can further include detecting a data transmission failure when the data transmission rate falls below the predetermined threshold. | 10-02-2014 |
| 20140347192 | Connecting Fiber Optic Cables - Mitigating back reflection in fiber optic cables when coupling two fiber optic cables, for example, for implementing in harsh environments including wellbores. As described below, light from a source can travel toward a target through a first fiber optic cable and a second fiber optic cable coupled to the first fiber optic cable using a coupling system. The two fiber optic cables can be coupled such that all or a portion of back reflection at the coupling part is absorbed rather than permitted to travel back toward the source through the first fiber optic cable. | 11-27-2014 |
| 20140354445 | Optical Device for use with Downhole Equipment - An optical device ( | 12-04-2014 |
| 20160024912 | BOTTOM HOLE ASSEMBLY FIBER OPTIC SHAPE SENSING - One or more of these thermomechanical properties of an underground formation can be monitored using a monitoring system. An example monitoring system includes a signal processing module, a visualization module, a signal source module, a signal detection module, and one or more optical fibers. Each fiber includes one or more sensors. The signal source module emits an optical signal into one or more optical fibers. The one or more sensors along the fiber interact with the optical signal, and alter the optical signal in response to one or more detected thermomechanical properties. The resulting optical signal is detected by the signal detection module. Based on the detected optical signal, the signal processing module determines the one or more thermomechanical properties that were detected by the sensors. An operator can view and monitor the detected thermomechanical properties using the visualization module. | 01-28-2016 |
| 20160097275 | Optical Interface System For Communicating With A Downhole Tool - An optical interface system is disclosed. In accordance with an embodiment, such a system includes an optical interface. A surface control system is coupled to a first end of the optical interface, and a logging tool coupled to an opposite second end of the optical interface. Data and/or power can be exchanged between the logging tool and the optical interface by converting electrical signals into corresponding optical signals which can be transmitted over the optical interface. Corresponding methods are also disclosed herein. | 04-07-2016 |
| 20160138389 | SUBSURFACE FIBER OPTIC STIMULATION-FLOW METER - A system is provided that includes a fiber optic cable and a fiber optic interrogator. The fiber optic cable contains acoustical sensors that can be positioned in stimulation fluid in a wellbore. The fiber optic interrogator can determine flow rate of the stimulation fluid based on signals from the fiber optic cable. | 05-19-2016 |
| 20160153277 | MONITORING A WELL FLOW DEVICE BY FIBER OPTIC SENSING | 06-02-2016 |
