System and method for deploying an optical fiber in a well

Details System and method for deploying an optical fiber in a well System and method for deploying an optical fiber in a well

G - Physics

02

B

G02B 6/44 (2006.01) E21B 23/08 (2006.01) E21B 47/12 (2006.01)

Patent

CA 2509810

A fiber optic sensor assembly capable of deployment down an instrumentation tube (6) located in a well bore (12), including a flexible protective tube (28) having a lumen encasing an optical fiber having a core portion and a claddingportion disposed within the flexible tube. The flexible protective tube protects the optical fiber from the oil, water or hydrogen gas within the well bore. A method of deploying the optical fiber down the well bore, is also provided. An optical fiber having a core and a cladding surrounded by the flexible protective tubing is deployed into the lumen of a tube disposed within the well bore by pumping a high pressure fluid into the lumen of the tube, thereby causing the deployment of the optical fiber down the well bore. The protective tubing is impermeable of hydrogen and other corrosive materials.

L'invention concerne un ensemble de capteurs à fibres optiques pouvant être déployé dans un tube d'instrumentation situé dans un trou de forage, comprenant un tube protecteur flexible dans lequel est ménagée une lumière renfermant une fibre optique, cette fibre optique comportant un coeur et une gaine disposés à l'intérieur du tube flexible. Ledit tube protecteur flexible protège la fibre optique vis-à-vis de l'huile, de l'eau ou du gaz hydrogène présents à l'intérieur du trou de forage. L'invention concerne en outre un procédé pour déployer la fibre optique dans le trou de forage. Ce procédé consiste à déployer une fibre optique, comportant un coeur et une gaine entourés par le tube protecteur flexible, dans la lumière d'un tube disposé à l'intérieur du trou de forage par pompage d'un fluide haute pression dans ladite lumière de façon à entraîner le déploiement de la fibre optique dans le trou de forage. Le tube protecteur est imperméable à l'hydrogène et à d'autres matières corrosives.

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