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Source: isol8 he’s “convinced of the superior capabilities of bismuth as a cost-effective alternative for sealing well abandonments and resealing failed abandonments that were previously plugged using cement. Thanks to the extensive system integration tri- als that have taken place through the Wellstrøm consortium, there is now also the means to deploy bismuth alloy seals in a totally controllable way.”

Next for WellStrøm is a program, supported by Demo 2000 funding from the Research Council of Norway, which will lead to a ?eld applicable tool system.

Interwell Cannseal too

Operating in a similar space and also subject to corporate activity is Interwell. Also based in Norway, Interwell, which has been developing thermite tools to burn through well sections, recently acquired Cannseal, a Norwegian tech- nology company that has developed a proprietary annular isolation technology based on a tailored epoxy recipe. This is to provide a sealant into the annulus at pre-de?ned loca- tions, to help seal off micro annuli, or also leaking produc- tion packers, for example, to re-establish well integrity. A form of its CannSeal epoxy is currently being developed for permanent P&A operations when injected into the cement micro/macro annulus.

january/february 2021 OFFSHORE ENGINEER 31