It took a while for this to happen and the right prototype to be created, it may still take a few more months, perhaps years, to explore in detail what all this has to offer to the well intervention industry, but the most important thing is that it’s already here and it’s a good fit for a geothermal project!

New fully metallic multipurpose MultiSense is a DFOS cable for standard and elevated temperature ranges (180°C or 356°F) and has a size of a standard slickline of 4.60 mm (3/16 in).

It is designed to support different measurement configurations and scenarios and can be produced in several versions to fit application requirements.

For example, in a standard version it is a perfect solution for permanent installation attached to the production tubing or embedded into cement casing. In a version with a strength wire member (i.e. replacing one tube) added to internal stranding layer it can be used for well intervention just like a standard slickline. In another slightly different configuration it can be injected inside Coiled Tubing (CT).

All this is to exploit its main benefits – simultaneous and combined use of coupled fibers and loose fibers as an integrated means for acquisition of independent data. Since the design inherits all the benefits of metallic MultiSense initially designed for Structural Health Monitoring applications, and now being applied in a well intervention industry, different measurement principles are supported and can be combined and conducted together in a single slickline size of 4.60 mm. Good overview of different data types can contribute significantly to a better and easier event and data interpretation. These include Raman – DTS, DAS, BOTDA/R and Fiber Bragg Grating (FBG) types. Since all sensing elements are helically stranded inside the cable, the design is flexible enough to be spooled onto standard slickline or wirelines units. In general, the flexibility in design and production opens possibilities to support other customer-born proprietary measurement concepts that are yet to be proposed and realized.