Rawwater Bismuth Plugs
The Bismuth Alternative
Recognising the need for a specialist alternative oil well plugging medium to cement, we have been investigating the use of bismuth alloys as a plugging medium for almost twenty years.
Eliminating common bismuth alloys, we have produced a suite of proprietary expanding metal alloys for use as high integrity seals in oil well abandonment. The alloy properties of low melting point and expansion upon solidification enable these high integrity seals to be cast in-situ, without the inherent creep issues typical of bismuth tin.
Operating envelopes to 320°F (160°C)
The result of our research is a suite of alloys for onshore, offshore and subsea plugging and abandonment. Operating envelopes cover downhole geothermal temperature conditions from 158 - 194°F (70 - 90°C) and 284 - 320°F (140 - 160°C). Each alloy has been subjected to a strict technical qualification programme overseen by Bureau Veritas, with stringent adherence to the qualification processes stipulated by DNV-RP-203 - Jul 2013, ISO 14310 (V0) and Oil & Gas UK. The application includes both casing plugs and plugs/seals in undefined and/or rough walled geometries.
Rawwater Bismuth Plugs have been certified to ISO 14310 V0 rating (no gas leak), with a differential pressure resistance of 6,000psi (>400bar).
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The standard industry test is an inadequate indication of the extreme sealing capabilities of our bismuth plugs. We therefore test to 2000x the required 'no bubble' period of 15 minutes.