Patents by Inventor Edward M. Dowd

Edward M. Dowd has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200026020
    Abstract: Certain aspects of the present disclosure provide techniques for making armored cables. An example method for making an armored cable includes forming a strip stock into an armor tubing; welding a seam of the armor tubing in a welding zone; inserting at least one of a first optical fiber or a first wire into a first end of a first guide tube, wherein: the first guide tube extends through the welding zone; the first guide tube protects the at least one of the first optical fiber or the first wire during the welding of the seam; and the first guide tube is not part of the armored cable after the making of the armored cable; and supporting the first guide tube within the armor tubing by a plurality of support legs such that the first guide tube does not contact the armor tubing.
    Type: Application
    Filed: July 15, 2019
    Publication date: January 23, 2020
    Inventors: Edward M. DOWD, Domino TAVERNER, John J. GRUNBECK
  • Patent number: 10173286
    Abstract: Certain aspects of the present disclosure provide techniques and corresponding apparatus for making armored cables with one or more optical fibers contained therein. The techniques may be utilized to control an amount of excess fiber length (EFL) in the armored cables. The techniques may also allow introduction of one or more optical fibers directly into a welding process without using an inner tube in the final armored cable. The techniques may also be utilized to reduce friction and static charge on the optical fiber(s) as the fiber(s) are pushed through one or more guide tubes that protect the fiber(s) during the welding process.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: January 8, 2019
    Assignee: Weatherford Technology Holdings, LLC
    Inventors: Edward M. Dowd, Jason Scott Kiddy, Mary Margaret Sequino
  • Patent number: 9841315
    Abstract: Methods and apparatus for performing Distributed Acoustic Sensing (DAS) using fiber optics with increased acoustic sensitivity are provided. Acoustic sensing of a wellbore, pipeline, or other conduit/tube based on DAS may have increased acoustic sensitivity through fiber optic cable design and/or increasing the Rayleigh backscatter property of a fiber's optical core. Some embodiments may utilize a resonant sensor mechanism with a high Q coupled to the DAS device for increased acoustic sensitivity.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: December 12, 2017
    Assignee: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
    Inventors: Domino Taverner, John J. Grunbeck, James R. Dunphy, Edward M. Dowd, David LaBella, Mark Baker, Andrew S. Kuczma, Francis X. Bostick, III
  • Patent number: 9435973
    Abstract: Embodiments of the present invention provide methods and apparatus for cables having one or more fibers that may function as a sensing device within a wellbore, wherein the fibers do not adhere to each other or to an inner wall of the cable during a high temperature operation, such as in a thermal recovery operation that may last over 30 days.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: September 6, 2016
    Assignee: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
    Inventors: Edward M. Dowd, Domino Taverner, John J. Grunbeck
  • Patent number: 9377598
    Abstract: Purging interior regions of a cable reduces or prevents hydrogen darkening of an optical fiber located in the cable. While hydrogen may permeate through an outer surface of the cable, fluid circulating through the cable purges the hydrogen from within the cable. This circulation of the fluid occurs between an inner tube containing the fiber and an outer tube surrounding the inner tube.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: June 28, 2016
    Assignee: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
    Inventors: Edward M. Dowd, John J. Grunbeck
  • Publication number: 20160116331
    Abstract: Methods and apparatus for performing Distributed Acoustic Sensing (DAS) using fiber optics with increased acoustic sensitivity are provided. Acoustic sensing of a wellbore, pipeline, or other conduit/tube based on DAS may have increased acoustic sensitivity through fiber optic cable design and/or increasing the Rayleigh backscatter property of a fiber's optical core. Some embodiments may utilize a resonant sensor mechanism with a high Q coupled to the DAS device for increased acoustic sensitivity.
    Type: Application
    Filed: December 30, 2015
    Publication date: April 28, 2016
    Inventors: Domino TAVERNER, John J. GRUNBECK, James R. DUNPHY, Edward M. DOWD, David ABELLA, Mark BAKER, Andrew S. KUCZMA, Francis X. BOSTICK, III
  • Publication number: 20160085023
    Abstract: Certain aspects of the present disclosure provide techniques and corresponding apparatus for making armored cables with one or more optical fibers contained therein. The techniques may be utilized to control an amount of excess fiber length (EFL) in the armored cables. The techniques may also allow introduction of one or more optical fibers directly into a welding process without using an inner tube in the final armored cable. The techniques may also be utilized to reduce friction and static charge on the optical fiber(s) as the fiber(s) are pushed through one or more guide tubes that protect the fiber(s) during the welding process.
    Type: Application
    Filed: September 2, 2015
    Publication date: March 24, 2016
    Inventors: Edward M. DOWD, Jason Scott KIDDY, Mary Margaret SEQUINO
  • Patent number: 9255836
    Abstract: Methods and apparatus for performing Distributed Acoustic Sensing (DAS) using fiber optics with increased acoustic sensitivity are provided. Acoustic sensing of a wellbore, pipeline, or other conduit/tube based on DAS may have increased acoustic sensitivity through fiber optic cable design and/or increasing the Rayleigh backscatter property of a fiber's optical core. Some embodiments may utilize a resonant sensor mechanism with a high Q coupled to the DAS device for increased acoustic sensitivity.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: February 9, 2016
    Assignee: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
    Inventors: Domino Taverner, John J. Grunbeck, James R. Dunphy, Edward M. Dowd, Andrew S. Kuczma, Francis X. Bostick, III, David Labella, Mark Baker
  • Publication number: 20160004024
    Abstract: Embodiments of the present invention provide methods and apparatus for cables having one or more fibers that may function as a sensing device within a wellbore, wherein the fibers do not adhere to each other or to an inner wall of the cable during a high temperature operation, such as in a thermal recovery operation that may last over 30 days.
    Type: Application
    Filed: July 8, 2015
    Publication date: January 7, 2016
    Inventors: Edward M. DOWD, Domino TAVERNER, John J. GRUNBECK
  • Patent number: 9104008
    Abstract: Embodiments of the present invention provide methods and apparatus for cables having one or more fibers that may function as a sensing device within a wellbore, wherein the fibers do not adhere to each other or to an inner wall of the cable during a high temperature operation, such as in a thermal recovery operation that may last over 30 days.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: August 11, 2015
    Assignee: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
    Inventors: Edward M. Dowd, John J. Grunbeck, Domino Tavemer
  • Publication number: 20150160075
    Abstract: Large diameter optical waveguides (cane) may stiffen as diameter increases. The minimum bend radius may become larger than is practical for many applications. Standard-sized optical fibers may be fusion spliced to the ends of a cane segment where the fusion splice area is protected with a high temperature coating such as polyimide. The cane segment is then heated (e.g., using a hot flame torch or arc) and bent to form a U-bend, or other angle, that is free of bending stress. The heated glass may be shaped, while maintaining the waveguide properties of the cane. Once cooled, the cane maintains the new shape. Therefore, light may be propagated around the bend or angle. Thus, many configurations of cane devices may be fabricated. Some examples of cane configurations include coils, U-turns (U-bends), angled inputs/outputs, etc. Bent cane may be useful for loop-back operations, such as double-ended Raman distributed temperate sensing (DTS).
    Type: Application
    Filed: October 17, 2014
    Publication date: June 11, 2015
    Inventors: Domino TAVERNER, Edward M. DOWD, David LABELLA
  • Patent number: 8769995
    Abstract: The present invention provides a method for making a multicore large diameter optical waveguide having a cross-section of at least about 0.3 millimeters, two or more inner cores, a cladding surrounding the two or more inner cores, and one or more side holes for reducing the bulk modulus of compressibility and maintaining the anti-buckling strength of the large diameter optical waveguide. The method features the steps of: assembling a preform for drawing a multicore large diameter optical waveguide having a cross-section of at least about 0.3 millimeters, by providing an outer tube having a cross-section of at least about 0.3 millimeters and arranging two or more preform elements in relation to the outer tube; heating the preform; and drawing the large diameter optical waveguide from the heated preform. In one embodiment, the method also includes the step of arranging at least one inner tube inside the outer tube.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: July 8, 2014
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Edward M. Dowd, Joseph J. Baraglia, Andrew S. Kuczma, Brian J. Pike, Thomas W. Engel, Martin A. Putnam
  • Patent number: 8712202
    Abstract: Methods and apparatus relate to optical fibers suitable for use in sensing applications exposed to radiation environments. The fibers include a core of pure silica or chlorine doped silica surrounded by a fluorinated silica cladding. These glasses for the core and cladding utilize dopants that resist radiation-induced attenuation. A two step process for forming the cladding can achieve necessary concentrations of the fluorine by performing a soot deposition process in a different environment from a consolidation process where the soot is sintered into a glass. Concentration of fluorine doped into the cladding layer enables obtaining a numerical aperture that confines a mono-mode of the fiber to resist bend-induced attenuation. Dimensions of the fiber further facilitate bending ability of the fiber.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: April 29, 2014
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Paul E. Sanders, Edward M. Dowd, Brian J. Pike
  • Patent number: 8689587
    Abstract: Methods to fabricate an optical preform for draw into Polarization Maintaining (PM) or Polarizing (PZ) optical fiber are provided. The methods involve assembly of pre-shaped and pieced together bulk glass elements into preforms (“assembled preforms”) for simultaneous fusing and drawing into optical fiber. These preforms form a stress-induced birefringent optical core when drawn to fiber.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: April 8, 2014
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Edward M. Dowd, Paul E. Sanders
  • Publication number: 20130167594
    Abstract: Methods to fabricate an optical preform for draw into Polarization Maintaining (PM) or Polarizing (PZ) optical fiber are provided. The methods involve assembly of pre-shaped and pieced together bulk glass elements into preforms (“assembled preforms”) for simultaneous fusing and drawing into optical fiber. These preforms form a stress-induced birefringent optical core when drawn to fiber.
    Type: Application
    Filed: September 12, 2012
    Publication date: July 4, 2013
    Inventors: Edward M. Dowd, Paul E. Sanders
  • Patent number: 8331742
    Abstract: Method and apparatus enable optical evanescent sensing utilizing a waveguide with an annular core. The annular core can provide detectable sensitivity to a measurand due to optical interactions with contents along an inside surface of the annular core since optical properties of the contents vary with changes in the measurand.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: December 11, 2012
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Domino Taverner, Edward M. Dowd
  • Patent number: 8301005
    Abstract: Apparatus and methods provide for cables with secured terminations. For some embodiments, a cable includes an inner tube surrounding an optical fiber, an aluminum tube surrounding the inner tube, and armor tubing surrounding the aluminum tube. The aluminum tube resists collapse of the inner tube at bends in the cable, inhibits or prevents hydrogen from reaching the fiber, and facilitates termination of the cable. For example, terminating the cable may include crimping the armor tubing to deform the aluminum tube into gripping engagement with an outside of the inner tube and an inside of the armor tubing. In some embodiments, a retention assembly secures the fiber relative to the inner tube and includes a retention tube secured to the inner tube and a packing sleeve squeezed into gripping engagement with the fiber by radial inward deformation of the retention tube where the packing sleeve is disposed in the retention tube.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: October 30, 2012
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Edward M. Dowd
  • Patent number: 8286450
    Abstract: Methods to fabricate an optical preform for draw into Polarization Maintaining (PM) or Polarizing (PZ) optical fiber are provided. The methods involve assembly of pre-shaped and pieced together bulk glass elements into preforms (“assembled preforms”) for simultaneous fusing and drawing into optical fiber. These preforms form a stress-induced birefringent optical core when drawn to fiber.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: October 16, 2012
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Edward M. Dowd, Paul E. Sanders
  • Publication number: 20120111104
    Abstract: Methods and apparatus for performing Distributed Acoustic Sensing (DAS) using fiber optics with increased acoustic sensitivity are provided. Acoustic sensing of a wellbore, pipeline, or other conduit/tube based on DAS may have increased acoustic sensitivity through fiber optic cable design and/or increasing the Rayleigh backscatter property of a fiber's optical core. Some embodiments may utilize a resonant sensor mechanism with a high Q coupled to the DAS device for increased acoustic sensitivity.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 10, 2012
    Inventors: Domino Taverner, John J. Grunbeck, James R. Dunphy, Edward M. Dowd, Andrew S. Kuczma, Francis X. Bostick, III, David Labella, Mark Baker
  • Publication number: 20120076464
    Abstract: Purging interior regions of a cable reduces or prevents hydrogen darkening of an optical fiber located in the cable. While hydrogen may permeate through an outer surface of the cable, fluid circulating through the cable purges the hydrogen from within the cable. This circulation of the fluid occurs between an inner tube containing the fiber and an outer tube surrounding the inner tube.
    Type: Application
    Filed: December 12, 2011
    Publication date: March 29, 2012
    Inventors: Edward M. Dowd, John J. Grunbeck