Weatherford/lamb, Inc.

Cidra Corporation

United Technologies Corporation

Weatherford Technology Holdings, LLC

Other

Finmeccanica S.p.a. - Ramo Aziendale Alenia

Cidra Corporate Services Inc.

James R Dunphy

John J Grunbeck

Alan D Kersey

Michael A Davis

James M Sullivan

Mark R Fernald

Domino Taverner

Guy A Daigle

Martin A Putnam

John A Moon

Joseph Francis Pinto

Robert N Brucato

Timothy J Bailey

Trevor Wayne MacDougall

Robert J Maron

Christopher J Wright

Paul Eric Sanders

Richard Todd Jones

James S Sirkis

Matthew B Miller

George J Talmadge

Arne Berg

Gerald Meltz

Sverre Knudsen

Paul S Szczepanek

Robert F Robinson

John J Sgambelluri

Joseph F Robbins

Thomas Wolfgang Engel

Daniel M Woo

Robert M Rukus

Matthew J Patterson

Trevor Macdougall

Milton E Ives

David Labella

Jay Walter Dawson

Edward Michael Dowd

Charles Winston

Christian Victor O'Keefe

Arthur D Hay

Paul Lefebvre

Francis X Bostick, Iii

Mark William Baker

Andrew S Kuczma

Andre R Vincelette

Pietro Ferraro

Milton E Ives, Jr

Christopher S Baldwin

Mauro Varasi

Ralph W Jones

Christopher Chestnut

Antonello Vannucci

Hongbo Li

David LaBella

Bryan Boemmels

Kenneth P Falkowich

Mario Signorazzi

Claudio Voto

Jong-Min Ha

James J Ryan

Francis X Bostick

Daniel L Gysling

Zaffir A Chaudhry

Roddie Robert Smith

Leon A Newman

Robin Mihekun Miller

Elias Snitzer

Jian-Qun Wu

Paul F Croteau

David Fournier

Thomas Gregory Tillman

Khai Tran

Robert A Rubino, Jr

Tuo Li

Thomas A Wynosky

Phillip E Pruett

David D Pearson

Constantino V Loffredo

David R Fournier

John L Kettle

Nancy Mary Rey

Charles W Helm

F Kevin Didden

Daniel Ming Kwong Woo

Martin C Foster

Kenneth C Dreitlein

Sabato I Imparato

Sabato Inserra Imparato

Geir Bjarte Havsgard

Francis X,iii Bostick

Iii Francis X Bostick

Francis X Bostick Iii

Methods and apparatus to control the acoustic properties of optical cables used as in-well oil and gas probes for acoustic monitoring, such as distributed acoustic sensing (DAS). One example aspect provides a solid path for the acoustic wave to propagate from an outside armor layer of the cable to the sensing optical waveguide embedded therein. Another example aspect offers ways to spatially dispose the optical sensing elements to create response delays indicative of the propagation speed and/or direction of an acoustic wave. Yet another example aspect provides ways to utilize additional spectral interrogation to increase ultimate spatial resolution. Yet another example aspect provides ways to locally vary the acoustic properties along the length of the cable.

Acoustically enhanced optical cables

An optical waveguide feedthrough assembly passes at least one optical waveguide through a bulk head, a sensor wall, or other feedthrough member. The optical waveguide feedthrough assembly comprises a cane-based optical waveguide that forms a glass plug sealingly disposed in a feedthrough housing. For some embodiments, the optical waveguide includes a tapered surface biased against a seal seat formed in the housing. The feedthrough assembly can include an annular gold gasket member disposed between the tapered surface and the seal seat. The feedthrough assembly can further include a backup seal. The backup seal comprises an elastomeric annular member disposed between the glass plug and the housing. The backup seal may be energized by a fluid pressure in the housing. The feedthrough assembly is operable in high temperature and high pressure environments.

Optical waveguide feedthrough assembly

Small profile apparatus for pressure and/or temperature sensing within a wellbore are provided. The apparatus may include optical sensing assemblies designed for inclusion in traditional or coiled production tubing deployments and suitable for use in high pressure, high temperature environments. One example assembly generally includes an outer housing, an inner housing at least partially disposed in the outer housing, a port for fluid communication between an internal volume of the inner housing and a volume external to the outer housing, and a large diameter optical waveguide disposed in the internal volume of the inner housing. The waveguide includes a first portion with a first grating and a second portion with a second grating, wherein the outer diameter of the large diameter optical waveguide is at least 300 &#x3bc;m.

Small profile pressure and temperature gauges

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.

Fiber optic cable for distributed acoustic sensing with increased acoustic sensitivity

Small profile apparatus for pressure and/or temperature sensing within a wellbore are provided. The apparatus may include optical sensing assemblies designed for inclusion in traditional or coiled production tubing deployments and suitable for use in high pressure, high temperature environments. One example assembly generally includes a housing having a divider for separating a first volume from a second volume inside the housing, a compressible element disposed in the first volume, wherein a first end of the compressible element is coupled to the divider and a second of the compressible element is sealed, and a large diameter optical waveguide disposed in an internal volume of the compressible element. The waveguide typically includes a first portion with a first grating and a second portion with a second grating, wherein the first portion has a greater outer diameter than the second portion.

An optical transducer is provided. A 'measuring' portion of the transducer may be exposed to a high pressure and fluids when the optical transducer is deployed (e.g., in a wellbore or other industrial setting). The transducer may include an optical waveguide with a first portion that forms a first seal that isolates an 'instrumentation' portion of the transducer from exposure to the high pressure and fluids to which the measuring portion may be exposed. The transducer may also include a second seal with a &#x201c;stack&#x201d; of material elements that contact a second portion of the optical waveguide to also isolate the instrumentation portion of the transducer from exposure to the high pressure and fluids to which the measuring portion may be exposed.

Optical transducer with integrated feedthrough

Methods and apparatus enable monitoring conditions in a well-bore using multiple cane-based sensors. The apparatus includes an array of cane-based Bragg grating sensors located in a single conduit for use in the well-bore. For some embodiments, each sensor is located at a different linear location along the conduit allowing for increased monitoring locations along the conduit.

Array temperature sensing method and system

An optical fiber feedthrough assembly includes a glass plug disposed in a recess of a feedthrough housing. The glass plug may define a large-diameter, cane-based, waveguide sealed within the recess in the housing and providing optical communication through the housing. Sealing occurs with respect to the housing at or around the glass plug of an optical waveguide element passing through the housing by braze sealing to the glass plug and/or embedding the glass plug in a polymer bonded with the plug to form a molded body that is sealed in the housing by, for example, compression mounting of the molded body or providing a sealing element around the molded body.

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Glastonbury, CT, United States of America

James R Dunphy