Fiber optic sensing system with hydrogen flush
US-9074988-B2 · Jul 7, 2015 · US
Downhole cable with reduced diameter
US9915798B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9915798-B2 |
| Application number | US-201514980218-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 28, 2015 |
| Priority date | Dec 28, 2015 |
| Publication date | Mar 13, 2018 |
| Grant date | Mar 13, 2018 |
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- Title
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- Abstract
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- Assignees and inventors
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- Key dates
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
An optical/electrical cable for downhole environments includes a plurality of optical fibers disposed within an interior metal tube. An electrically conducting layer surrounds the interior metal tube, an insulation layer surrounds and contacts the electrically conducting layer, and an exterior metal tube surrounds and contacts the insulation layer.
First claim
Opening claim text (preview).
What is claimed is: 1. An optical/electrical cable for downhole environments, comprising a plurality of optical fibers disposed within an interior metal tube; an electrically conducting layer surrounding the interior metal tube; an insulation layer surrounding and contacting the electrically conducting layer; and an exterior metal tube surrounding and contacting the insulation layer, wherein the interior metal tube is coaxial with the exterior metal tube and wherein the exterior metal tube has an outer diameter of less than or equal to 4.0 mm. 2. The cable according to claim 1 , wherein the interior metal tube comprises stainless steel. 3. The cable according to claim 1 , wherein the exterior metal tube comprises a steel alloy. 4. The cable according to claim 1 , wherein the electrically conducting layer includes copper. 5. The cable according to claim 1 , wherein a separating layer is provided between the electrically conducting layer and the interior metal tube. 6. The cable according to claim 1 , wherein the optical fibers are embedded in a gel. 7. The cable according to claim 1 , wherein the optical fibers perform as optical sensor or as communication optical fiber, and the interior metal tube houses together optical fibers performing as optical sensor and optical fibers performing as communication optical fiber. 8. A hybrid cable with a coaxial construction, comprising: an exterior metal tube; a layered tubular conductor positioned coaxially within the exterior metal tube, comprising an electrically conducting layer surrounding and in direct contact with an interior metal tube, where the electrically conducting layer has an electrical conductivity higher than the interior metal tube; an insulator separating the layered tubular conductor from the exterior metal tube; and optical fibers housed within the interior metal tube, wherein the interior metal tube is coaxial with the exterior metal tube and wherein the exterior metal tube has an outer diameter of less than or equal to 4.0 mm.
Assignees
Inventors
Classifications
- H01B1/02Primary
mainly consisting of metals or alloys · CPC title
- H01B11/22Primary
Cables including at least one electrical conductor together with optical fibres · CPC title
attached to objects sunk in bore holes, e.g. well drilling means, well pumps · CPC title
Construction of the insulation between the conductors · CPC title
Protective covering · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9915798B2 cover?
- An optical/electrical cable for downhole environments includes a plurality of optical fibers disposed within an interior metal tube. An electrically conducting layer surrounds the interior metal tube, an insulation layer surrounds and contacts the electrically conducting layer, and an exterior metal tube surrounds and contacts the insulation layer.
- Who is the assignee on this patent?
- Prysmian Spa
- What technology area does this patent fall under?
- Primary CPC classification H01B1/02. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 13 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).