Abstract: Various embodiments include methods and apparatus structured to install an optical fiber cable into a well at a well site. In a from-bottom-to-top embodiment, an anchor deployed at a selected location in a hole of the well can be used and the optical fiber cable can be pulled up to a surface of the well from the selected location. In a from-top-to-bottom embodiment, an optical fiber cable can be moved down from the surface until an end of the optical fiber cable is locked at a selected location by a catcher disposed at the selected location. With the optical fiber cable in the well, a portion of the optical fiber cable can be coupled to surface instrumentation. Additional apparatus, systems, and methods can be implemented in a variety of applications.

Abstract: Various embodiments include methods and apparatus structured to install an optical fiber cable into a well at a well site. In a from-bottom-to-top embodiment, an anchor deployed at a selected location in a hole of the well can be used and the optical fiber cable can be pulled up to a surface of the well from the selected location. In a from-top-to-bottom embodiment, an optical fiber cable can be moved down from the surface until an end of the optical fiber cable is locked at a selected location by a catcher disposed at the selected location. With the optical fiber cable in the well, a portion of the optical fiber cable can be coupled to surface instrumentation. Additional apparatus, systems, and methods can be implemented in a variety of applications.

Abstract: Various embodiments include methods and apparatus structured to install an optical fiber cable into a well at a well site. In a from-bottom-to-top embodiment, an anchor deployed at a selected location in a hole of the well can be used and the optical fiber cable can be pulled up to a surface of the well from the selected location. In a from-top-to-bottom embodiment, an optical fiber cable can be moved down from the surface until an end of the optical fiber cable is locked at a selected location by a catcher disposed at the selected location. With the optical fiber cable in the well, a portion of the optical fiber cable can be coupled to surface instrumentation. Additional apparatus, systems, and methods can be implemented in a variety of applications.

Abstract: A method is described for enabling Raman Based Distributed Temperature Sensing (DTS) systems to operate over larger environmental temperature ranges than any systems available today.

Abstract: Disclosed is a system and method for improving the performance of downhole Distributed Acoustic Sensing (DAS) systems by simultaneous use of co-propagating and counter-propagating Distributed Raman Amplification (DRA). It uses a surface DRA system with a surface DAS system to combine their laser sources where the distal end of the downhole sensing fiber use uses a Wavelength Division Multiplexer (WDM) to optically split the DRA and DAS signals onto two optical fibers. The DAS fiber/signal is terminated with a low reflectance termination to minimize a potential back reflection whereas the DRA fiber is terminated with a high reflectance termination causing all the light to reflect back up the sensing fiber. This arrangement allows for simultaneous co and counter-propagating DRA of the DAS signals, both the transmitted pulse and the back scattered light, thus creating the maximum amount of gain possible.

Abstract: Various embodiments include methods and apparatus structured to install an optical fiber cable into a well at a well site. In a from-bottom-to-top embodiment, an anchor deployed at a selected location in a hole of the well can be used and the optical fiber cable can be pulled up to a surface of the well from the selected location. In a from-top-to-bottom embodiment, an optical fiber cable can be moved down from the surface until an end of the optical fiber cable is locked at a selected location by a catcher disposed at the selected location. With the optical fiber cable in the well, a portion of the optical fiber cable can be coupled to surface instrumentation. Additional apparatus, systems, and methods can be implemented in a variety of applications.

Abstract: A system of translatable electro acoustic technology (EAT) modules for deployment along an oil or gas wellbore casing includes: a wireline/slickline optical distributed acoustic sensing (DAS) cable deployed from the surface into the casing and connected to a surface interrogator; a tractor attached to the downhole end of the wireline/slickline optical distributed acoustic sensing (DAS) cable; and one or more EAT sensing modules that can be coupled to or decoupled from the wireline/slickline optical distributed acoustic sensing (DAS) cable at pre-selected locations and can either be coupled to or decoupled from the casing of the wellbore or be allowed to reposition along the wellborn casing, wherein the one or more EAT sensing modules can conduct multiple measurements and communicate the results via the wireline/slickline optical distributed acoustic sensing (DAS) cable to the surface interrogator.

Abstract: A system for continuous determination of annulus pressure in subsurface wells comprises one or more electro acoustic technology sensor assemblies permanently installed in each annulus surrounding a subsurface well; and a fiber optic cable in close proximity to the electro acoustic technology sensor assemblies and in communication with a surface distributed acoustic fiber optic interrogator.

Abstract: A method is described for enabling Raman Based Distributed Temperature Sensing (DTS) systems to operate over larger environmental temperature ranges than any systems available today.

Abstract: A system of translatable electro acoustic technology (EAT) modules for deployment along an oil or gas wellbore casing comprises: a wireline/slickline optical distributed acoustic sensing (DAS) cable deployed from the surface into the casing and connected to a surface interrogator; a tractor attached to the downhole end of the wireline/slickline optical distributed acoustic sensing (DAS) cable; and one or more EAT sensing modules that can be coupled to or decoupled from the wireline/slickline optical distributed acoustic sensing (DAS) cable at pre-selected locations and can either be coupled to or decoupled from the casing of the wellbore or be allowed to reposition along the wellborn casing, wherein the one or more EAT sensing modules can conduct multiple measurements and communicate the results via the wireline/slickline optical distributed acoustic sensing (DAS) cable to the surface interrogator.

Abstract: A cable introduction assembly that can include: a spool assembly including a spool having a first axis, the spool configured to retain a cable wound around the first axis in an undeployed mode; and a spool mount assembly configured to retain the spool and introduce the cable in a deployed mode into a conduit configured for a downhole environment, the conduit having a proximal end and a distal end, the cable in the deployed mode extending from the proximal end towards the distal end, wherein the spool assembly is configured to provide a handedness to the cable in the deployed mode.

Abstract: Disclosed is a system and method for improving the performance of downhole Distributed Acoustic Sensing (DAS) systems by simultaneous use of co-propagating and counter-propagating Distributed Raman Amplification (DRA). It uses a surface DRA system with a surface DAS system to combine their laser sources where the distal end of the downhole sensing fiber use a Wavelength Division Multiplexer (WDM) to optically split the DRA and DAS signals onto two optical fibers. The DAS fiber/signal is terminated with a low reflectance termination to minimize a potential back reflection whereas the DRA fiber is terminated with a high reflectance termination causing all the light to reflect back up the sensing fiber. This arrangement allows for simultaneous co and counter-propagating DRA of the DAS signals, both the transmitted pulse and the back scattered light, thus creating the maximum amount of gain possible.

Abstract: Various embodiments include methods and apparatus structured to increase efficiencies of a drilling operation. These efficiencies may be realized with a fiber cable located in a wellbore at a well site, where the fiber cable can include an optical fiber disposed as a single handed helix in the fiber cable, where the optical fiber is disposed in the cable without having helix hand reversal. Construction of such fiber cables may include applying a twist to the optical fiber during insertion of the optical fiber into the fiber cable in a tubing process in which control of an amount of the twist to form a portion of the optical fiber can control excess fiber length in the tube. Additional apparatus, systems, and methods can be implemented in a variety of applications.

Abstract: A cable for use in a wellbore can include an outer housing and a chamber disposed coaxially within the outer housing. The chamber can have a cross-sectional end length that is substantially the same as an inner diameter of the outer housing. The cable can also include a fiber optic cable disposed in a nonlinear arrangement within the chamber. The cable can also include a conductor disposed adjacent to the chamber within the outer housing. The conductor can be usable for transmitting power to a well tool.

Abstract: A system and method for enabling inductive charging through downhole casings for electro acoustic technology devices.

Abstract: Various embodiments include methods and apparatus structured to increase efficiencies of a drilling operation. These efficiencies may be realized with a fiber cable located in a wellbore at a well site, where the fiber cable can include an optical fiber disposed as a single handed helix in the fiber cable, where the optical fiber is disposed in the cable without having helix hand reversal. Construction of such fiber cables may include applying a twist to the optical fiber during insertion of the optical fiber into the fiber cable in a tubing process in which control of an amount of the twist to form a portion of the optical fiber can control excess fiber length in the tube. Additional apparatus, systems, and methods can be implemented in a variety of applications.

Abstract: Disclosed is a fiber optic interrogation system unit with one or more controllable laser sources that are electrically tuned to fit the laser source requirements for different sensing principles. Such an interrogation unit would employ a designed optical configuration at the distal end of the optical fiber to enable DAS, DTS and stimulated Brillouin DSS to operate on the same optical fiber. It would provide a single fiber optic interrogation system with integrated DTS, DAS and DSS systems that is cost effective and simple in design.

Abstract: A cable introduction assembly that can include: a spool assembly including a spool having a first axis, the spool configured to retain a cable wound around the first axis in an undeployed mode; and a spool mount assembly configured to retain the spool and introduce the cable in a deployed mode into a conduit configured for a downhole environment, the conduit having a proximal end and a distal end, the cable in the deployed mode extending from the proximal end towards the distal end, wherein the spool assembly is configured to provide a handedness to the cable in the deployed mode.

Abstract: The present invention is directed to an optical fiber that includes a glass core region that has nano-sized structures configured to scatter light propagating in the glass core region. The glass core region has an average refractive index navg. The fiber includes an interior glass cladding region that has an interior cladding refractive index n2 that is less than navg. The fiber includes an outer cladding region that has an outer cladding refractive index n3 that is less than n2. A refractive index difference of n2?n3 corresponds to a bend uniformity diameter; the light exiting the outer cladding at a fiber bending location is substantially non-uniform when a bending diameter of the fiber bending location is less than the bend uniformity diameter.

Abstract: A multicore optical fiber with a reference section having a material defining a marked multicore glass optical fiber. The multicore fibers can be in groupings, for example, the groupings can be in the form of one of an optical fiber ribbon covered by a matrix, and a tight buffered cable. Fiber optic connectors can be assembled to the multicore optical fiber at either or both ends, and the colored portion can be associated with the optical fiber connector aligning the optical core elements with the optical connectors. The assembly can have at least one transceiver device with a transmit port and a receive port defining a two-way communication channel. Further aspects describe methods of manufacturing multicore fibers including application of curable coatings and reference sections.