Well sealing material and method of producing a plug
US12000237B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Jun 21, 2019 |
| Grant date | Jun 4, 2024 |
| Priority date | — |
| Expiry date | Sep 4, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C12/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Bismuth-based alloys comprising at least about 50% by weight bismuth, about 30 to about 35% by weight tin, and about 1.8 to about 2.8% by weight antimony; and an alloy of bismuth and silver comprising about 90 to about 97% by weight bismuth and about 3 to about 9% by weight silver. A plug comprising an alloy of bismuth, tin, and antimony; and a plug comprising an alloy of bismuth and silver. A method of using a plug made from a bismuth-based alloy to seal a well, wherein a length of a well is filled with the molten alloy and the molten alloy is allowed to solidify.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.