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公开(公告)号：US10451807B2
公开(公告)日：2019-10-22
申请号：US14497573
申请日：2014-09-26
发明人： Domino Taverner , John J. Grunbeck
摘要： A sensing device is used for measuring physical characteristics. The sensing device may include an optical fiber disposed in a tube. The optical fiber may have a section containing a fiber Bragg grating (FBG) sensor. A support member may be coupled to the ends of the section, such that the section includes a length greater than a length of the portion of the support member disposed between the ends of the section. The support member is configured to isolate the FBG sensor from strain in the optical fiber.
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公开(公告)号：US09677963B2
公开(公告)日：2017-06-13
申请号：US14330338
申请日：2014-07-14
发明人： Domino Taverner , John J. Grunbeck , James Dunphy
CPC分类号： G01L11/025 , E21B47/01 , E21B47/011 , E21B47/06 , G01K11/32 , G02B6/02057 , G02B6/02076 , G02B6/02209 , G02B6/34
摘要： 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.
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公开(公告)号：US12111510B2
公开(公告)日：2024-10-08
申请号：US18383605
申请日：2023-10-25
CPC分类号： G02B6/4488 , B23K26/24 , G02B6/443 , G02B6/4438 , G02B6/4485
摘要： 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.
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公开(公告)号：US10527812B2
公开(公告)日：2020-01-07
申请号：US16230488
申请日：2018-12-21
摘要： Fiber optic cables suitable for use in downhole applications, with one or more features for inhibiting flow of any fluid breaching an armor layer of the optical cable are provided. By preventing, or at least impeding, fluid flow along the cable length, any breaching fluid may be confined to a small region of the cable, which may significantly reduce the deleterious effects (e.g., hydrogen darkening) of an armor layer breach. One example optical cable generally includes one or more optical fibers, an inner tube surrounding the one or more optical fibers, an outer tube surrounding the inner tube, and one or more polymer sealing features disposed in an annulus between the outer tube and the inner tube and bonded to at least one of the inner tube or the outer tube to prevent fluid flow in the annulus along at least a portion of a length of the optical cable.
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公开(公告)号：US09841315B2
公开(公告)日：2017-12-12
申请号：US14983994
申请日：2015-12-30
发明人： Domino Taverner , John J. Grunbeck , James R. Dunphy , Edward M. Dowd , David LaBella , Mark Baker , Andrew S. Kuczma , Francis X. Bostick, III
CPC分类号： G01H9/004 , E21B47/123 , G01V2210/1429 , G02B6/02342 , G02B6/02395 , G02B6/4433
摘要： 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.
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公开(公告)号：US11880084B2
公开(公告)日：2024-01-23
申请号：US18106013
申请日：2023-02-06
CPC分类号： G02B6/4488 , B23K26/24 , G02B6/443 , G02B6/4438 , G02B6/4485
摘要： 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.
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公开(公告)号：US10606000B2
公开(公告)日：2020-03-31
申请号：US15185311
申请日：2016-06-17
发明人： James R. Dunphy , John J. Sgambelluri , John J. Grunbeck , George J. Talmadge , Robert F. Robinson , James M. Sullivan , Joseph F. Robbins
摘要： 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.
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公开(公告)号：US10338336B1
公开(公告)日：2019-07-02
申请号：US15864205
申请日：2018-01-08
摘要： Fiber optic cables suitable for use in downhole applications, with one or more features for inhibiting flow of any fluid breaching an armor layer of the optical cable are provided. By preventing, or at least impeding, fluid flow along the cable length, any breaching fluid may be confined to a small region of the cable, which may significantly reduce the deleterious effects (e.g., hydrogen darkening) of an armor layer breach. One example optical cable generally includes one or more optical fibers, an inner tube surrounding the one or more optical fibers, an outer tube surrounding the inner tube, and one or more polymer sealing features disposed in an annulus between the outer tube and the inner tube and bonded to at least one of the inner tube or the outer tube to prevent fluid flow in the annulus along at least a portion of a length of the optical cable.
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公开(公告)号：US10175131B2
公开(公告)日：2019-01-08
申请号：US15478781
申请日：2017-04-04
摘要： 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 μm.
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公开(公告)号：US09588314B2
公开(公告)日：2017-03-07
申请号：US14941836
申请日：2015-11-16
CPC分类号： G02B6/4428 , G01D5/35316 , G02B6/022 , G02B6/02204 , G02B6/4248 , G02B6/4251 , G02B6/4416 , G02B6/4477
摘要： 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 “stack” 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.
摘要翻译： 提供光学换能器。 换能器的“测量”部分可以暴露于高压和流体，当光学换能器被展开时（例如，在井眼或其他工业环境中）。 换能器可以包括具有第一部分的光波导，第一部分形成第一密封，其将换能器的“仪器”部分与暴露于测量部分可能暴露的高压和流体隔离。 传感器还可以包括具有接触光波导的第二部分的材料元件的“堆叠”的第二密封，以将换能器的仪器部分与暴露于测量部分可能暴露于的高压和流体 。
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