Carrier rod for an optical fiber assembly and system for monitoring deformation of well equipment
AssigneeShell Oil Company
InventorKari-Mikko Jääskeläinen
Life of this patent
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Abstract
A carrier rod having at least one recess extending along at least part of the length of the rod, in which recess a optical fiber assembly for monitoring strain, temperature and/or other physical parameters is arranged, which optical fiber assembly is along at least part of its length bonded within the recess. The carrier rod can be used in a system or a method of monitoring deformation and other characteristics of a casing or other tubular or cylindrical well equipment in a well traversing an underground formation.
Claims20
A carrier rod for lowering an optical fiber assembly into a well, said carrier rod having at least one recess extending along at least part of the length of the rod, the recess having an outer width, in which recess an optical fiber assembly for monitoring strain, temperature or other physical parameters is arranged, which optical fiber assembly is along at least part of the optical fiber assembly's length bonded within the recess with a filler, whereby the filler surrounding the optical fiber assembly and the carrier rod is surrounded by two layers of protective coatings of which an inner layer is in contact with the filler across the full recess outer width.
A system for monitoring deformation, strain, temperature or other physical characteristics of a casing, sandscreen, electrical heater or other tubular or cylindrical well equipment in a well traversing an underground formation, comprising:
- a carrier rod for lowering an optical fiber assembly into the well, said carrier rod having at least one recess extending along at least part of the length of the rod, the recess having an outer width, in which recess an optical fiber assembly for monitoring strain, temperature or other physical parameters is arranged, which optical fiber assembly is along at least part of the optical fiber assembly's length bonded within the recess with a filler, whereby the filler surrounding the optical fiber assembly and the carrier rod is surrounded by two layers of protective coatings of which an inner layer is in contact with the filler across the full recess outer width;
- and
- an optical signal transmission and reception assembly connected to the optical fiber assembly.
Dependencies are inferred from the claim text.