Fiber optic cable for use in harsh environments
First Claim
Patent Images
1. An optic cable suitable for down hole oil field applications, comprising:
- an inner tube comprising a polymer sheath disposed over a metal tube;
one or more optical fibers disposed in the inner tube; and
a corrosion resistant metal outer tube disposed over the inner tube and making intermittent contact therewith, wherein the intermittent contact mechanically retains the inner tube relative to the outer tube due to frictional contact.
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Abstract
Fiber optic cables suitable for use in harsh environments such as down hole oil and gas well applications and methods for fabricating the same have been provided. In one embodiment, an optic cable suitable for down hole oil field applications comprises one or more optical fibers disposed in an inner tube and a corrosion resistant metal outer tube disposed over the inner tube, where the inner and outer tubes make intermittent contact. In another embodiment, an optic cable suitable for down hole oil field applications comprise one or more optical fibers disposed in a polymer tube having fins extending therefrom.
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Citations
21 Claims
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1. An optic cable suitable for down hole oil field applications, comprising:
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an inner tube comprising a polymer sheath disposed over a metal tube; one or more optical fibers disposed in the inner tube; and a corrosion resistant metal outer tube disposed over the inner tube and making intermittent contact therewith, wherein the intermittent contact mechanically retains the inner tube relative to the outer tube due to frictional contact. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An optic cable suitable for down hole oil field applications, comprising:
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a metal outer tube; a polymer tube disposed within the outer tube and having a plurality of fins extending outwardly therefrom and mechanically coupling with the metal outer tube to substantially prevent movement of the polymer tube within the metal outer tube; and one or more optical fibers disposed in the polymer tube, wherein the cable includes a greater length of optical fibers per unit length of polymer tube. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. An optic cable suitable for down hole oil field applications, comprising:
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a metal outer tube; a polymer tube disposed within the outer tube and having a different shape than an inner diameter of the metal outer tube, wherein a perimeter of the polymer tube lying in a cross sectional plane of the polymer tube intermittently contacts the inner diameter of the metal outer tube to mechanically engage the metal outer tube and secure the polymer tube and the outer tube relative to one another; one or more optical fibers disposed in the polymer tube, wherein the cable includes a greater length of optical fibers per unit length of polymer tube; and a viscous filler material disposed between the one or more optical fibers and the inner tube, wherein a hydrogen absorbing material is intermixed in the filler material.
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Specification