Baker Hughes Corporation

Baker Hughes, a Ge Compnay, LLC

Baker Huges Incorporated

Baker Hughes Holdings LLC

Christopher H Lambert

Paul Francis Wysocki

Daniel Scott Homa

Robert M Harman

Carl W Stoesz

Brooks A Childers

Roger Glen Duncan

Juan P Franco

Ajit Balagopal

Ashwin Chandran

Malcolm S Laing

Matthew Thomas Raum

Jonas Ivasauskas

Charles A Giebner

A sensing apparatus includes a sheath, a central member disposed in the sheath, at least one optical fiber disposed with the central member, and a film adhesive disposed between the central member and the sheath, the film adhesive provided in one or more sheets or strips and disposed in one or more layers between the central member and the sheath, and the film adhesive attached to the sheath.

Distributed sensing system employing a film adhesive

Disclosed herein is a method for sensing one or more selected parameters related to a structure of interest, for example, the shape of an isolated structure. A cable is attached to the structure of interest at one or more attachment points. The cable contains one or more optical fibers. One or more light signals are transmitted into the one or more optical fibers and then detected to form a data set. The data set is compared with information known about the one or more attachment points to determine error values. The error values are then combined with the data set to determine the selected parameters associated with the structure.

Fiber optic shape sensing system using anchoring points

An apparatus for estimating a parameter includes: an optical fiber sensor including at least one optical fiber configured to be disposed in a downhole location and including at least one sensing location configured to generate measurement signals; at least one light source configured to transmit a measurement signal having a wavelength to interrogate a sensing location and cause the sensing location to return a reflected measurement signal indicative of a measured parameter, and configured to transmit a reference signal and cause a reflected reference signal to be returned from a location associated with the sensing location, the reflected reference signal having a known relationship to hydrogen concentration; and a processor configured to receive the reflected measurement signal and the reflected reference signal, estimate the hydrogen concentration based on the reflected reference signal, and calibrate the first reflected signal based on the estimated hydrogen concentration.

Loss compensation for distributed sensing in downhole environments

A fiber optic cable arrangement includes a core, a sheath surrounding the core and being strain locked to the core, and at least one optical fiber positioned within the sheath being strain locked to the core.

Fiber optic cable arrangement

A strain sensing cable including one or more strain sensing elements and a strain transfer medium extruded directly onto the one or more strain sensing elements disposed within the strain transfer medium. The strain transfer medium is operatively arranged to transfer strain experienced by the cable to the one or more strain sensing elements. A method of making a strain sensing cable is also included.

Strain sensing cable

A sensing assembly including a fiber for monitoring at least one condition or parameter and a strip formed from a pair of laminae disposed with the fiber. The laminae are arranged parallel to each other and engaged longitudinally along the fiber for enabling the strip to secure the fiber in place. A method of monitoring a parameter or condition with a sensing assembly is also included.

Sensing assembly

A fiber optic cable for use in a downhole environment is disclosed. The fiber optic cable includes a tube having an interior region; an optical fiber disposed in the interior region of the tube; a gas in the interior region; and a gel in the interior region, wherein the gel is configured to reduce stress on the optical fiber in the presence of the gas at a temperature substantially near the flashpoint of the gel. One or more seals can be used to seal the gel and the inert gas in the interior region. In various aspects, the fiber optic cable can be used in a downhole environment.

Extended temperature fiber optic cable design

A sensing cable, including an outer cladding; and at least one sensing bundle contained within the cladding, each sensing bundle having a sensing fiber wrapped strain-transmissively by at least one strand. A method of sensing strain is also included.

A method of removing a polymer material from an optical fiber assembly includes: disposing a liquid metallic material proximate to the polymer material, the polymer material being bonded to the optical fiber; heating the liquid metallic material to a temperature sufficient to burn the polymer material and de-bond the polymer material from a surface of the optical fiber; and removing the polymer material and liquid metal from the surface of the optical fiber.

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Blacksburg, VA, United States of America

Christopher H Lambert