Abstract: A carrier rod having at least one recess extending along at least part of the length of the rod, in which recess a optical fiber assembly for monitoring strain, temperature and/or other physical parameters is arranged, which optical fiber assembly is along at least part of its length bonded within the recess. The carrier rod can be used in a system or a method of monitoring deformation and other characteristics of a casing or other tubular or cylindrical well equipment in a well traversing an underground formation.

Abstract: 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.

Abstract: An example device in accordance with an aspect of the present disclosure includes a splice housing body comprising a raceway within which optical fibers and electrical cables can be positioned, at least one port through the splice housing body to which a pressure fitting for optical fiber or electrical cable can be mounted, a base to which the splice housing body may be removably attached, and a port in one of the splice housing body or base for inserting fluid in the splice housing body.

Abstract: An example device in accordance with an aspect of the present disclosure includes a splice housing body comprising a raceway within which optical fibers can be positioned, at least one port through the splice housing body to which a pressure fitting for optical fiber can be mounted, a base to which the splice housing body may be removably attached, and a port in one of the splice housing body or base for inserting fluid in the splice housing body.

Abstract: The use of a distributed fiber optic strain sensor system in horizontal hydraulic fracturing wells to determine several measurements of hydraulic fracture system geometry including number of farfield fractures, hydraulic and propped fracture length, fracture azimuth, and multi-planar fracture complexity.

Abstract: A method of monitoring deformation and other characteristics of a casing or other tubular or cylindrical well equipment in a well traversing an underground formation. The method includes providing a carrier rod having at least one recess extending along at least part of the length of the rod, in which recess an optical fiber assembly for monitoring strain, temperature and/or other physical parameters is arranged, which assembly is along at least part of the assembly's length bonded within the recess; lowering the carrier rod and well equipment simultaneously into the well such that the rod is arranged in an annular space between the well equipment and the wellbore; securing the rod at a plurality of locations distributed along the rod's length to the well equipment; and connecting the optical fiber assembly to an optical signal transmission and reception assembly for monitoring physical parameters of the well equipment.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Aspects of the disclosure include an optical fiber sensing system and apparatus that provide for free rotation of fiber optic cables containing multiple cores. For example, the disclosure presents a fiber optic rotary joint, comprising a stator housing a non-rotating portion of a dual-core fiber optic cable and a rotor housing a rotating portion of the dual-core fiber optic cable. In such an example, the rotor is mounted to the stator to allow rotation of at least a portion of the rotor about at least a portion of the stator. Further provided is an optical fiber sensing system, comprising one or more multiplexor/demultiplexors configured to multiplex and demultiplex one or more signals, a dual-core fiber optic cable communicatively coupled to the multiplexor/demultiplexor and configured to carry one or more signals on an inner core and an outer core disposed about the inner core, and a dual-core fiber optic rotary joint.

Abstract: A method and apparatus for seismic sensing is described. The apparatus includes an outer cable coupled to a formation and an outer fiber component proximate to the outer cable. When seismic P- and S-waves propagate from the formation to the outer cable, strain is placed on the outer fiber cable, which may be measured by a distributed acoustic sensing system coupled to the outer fiber cable. An inner cable positioned within the outer cable includes a corresponding inner fiber component. The innerduct between the outer and inner cables is filled with a gas or fluid which allows only P-waves to propagate to the inner cable. Those P-waves induce strain on the inner fiber component, which may be measured by the distributed acoustic sensing system. By measuring the seismic P- and S-waves at the outer fiber component, and the isolated seismic P-wave at the inner fiber component, it is possible to calculate an isolated seismic S-wave measurement. Methods for deploying the seismic sensing apparatus are also described.

Abstract: A method of mitigating deposit build-up in a conduit can include an optical distributed acoustic sensing system detecting a substance as the substance flows through the conduit, and determining a location and volume of the deposit build-up along the conduit, based on the detecting. A conduit monitoring system can include a chemical treatment supply and an optical distributed acoustic sensing system, the chemical treatment supply automatically delivering a chemical treatment into a conduit in response to detection by the optical distributed acoustic sensing system of a deposit build-up in the conduit. Another method of mitigating deposit build-up can include an optical distributed acoustic sensing system detecting a substance as it flows through a conduit, determining a location and volume of the deposit build-up along the conduit, based on the detecting, and automatically controlling a chemical treatment supply, based on the determining, thereby optimizing mitigation of the deposit build-up.

Abstract: A fiber optic sensor interrogation system with inbuilt passive power limiting capability that provides improved safety performance for use in explosive atmospheres.

Abstract: 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.

Abstract: Systems and methods for distributed acoustic sensing based on coherent Rayleigh scattering are disclosed herein. A system comprises a pulse generator, an optical fiber coupled to the pulse generator, an interferometer coupled to the optical fiber, a photodetector assembly coupled to the interferometer, and an information handling system, which activates two optical gain elements so as to vary the optical path length of the interferometer. A method comprises sending an optical pulse down an optical fiber, splitting backscattered light from the optical pulse into a first backscattered pulse and a second backscattered pulse, activating a first optical gain element and a second optical gain element, sending the first backscattered pulse into a first arm of an interferometer, sending the second backscattered pulse into a second arm of an interferometer, combining the first and second backscattered pulses to form an interferometric signal, and receiving the interferometric signal at a photodetector assembly.

Abstract: Systems and methods for distributed acoustic sensing based on coherent Rayleigh scattering are disclosed herein. A system comprises a pulse generator, optical fibers coupled to the pulse generator, an interferometer coupled to the optical fibers, a photodetector assembly coupled to the interferometer, and an information handling system configured to detect a difference in backscattered light from the optical fibers. A method comprises sending an optical pulses down optical fibers, receiving backscattered light from the optical pulses, combining the backscattered light from the optical pulses to form an interferometric signal, receiving the interferometric signal at a photodetector assembly, and determining a difference in the interferometric signal at an information handling system.

Abstract: A method for installing multiple fiber optic cables in coiled tubing in oil and gas operations.

Abstract: A method for installing multiple fiber optic cables in coiled tubing in oil and gas operations.

Abstract: Monitoring a well flow device by fiber optic sensing. A system includes processing circuitry configured to be disposed downhole in a wellbore. The processing circuitry is configured to receive a downhole parameter signal that represents an operational parameter of a well flow device in the wellbore, and perturb a fiber optic cable, based on the downhole parameter signal, to transmit the downhole parameter signal over the fiber optic cable. A fiber optic sensing system is coupled to the processing circuitry via the fiber optic cable. The fiber optic sensing system is configured to be disposed outside of the wellbore to extract, from the fiber optic cable, the downhole parameter signal.

Abstract: A multifunctional end cap assembly for use in terminating the toe end of subsurface coiled tubing strings that include multiple sensors. The assembly includes provisions for turnarounds for DTS or DAS systems as well as provisions for connecting formation pressures with a pressure transducer within the coiled tubing string.