Eutectic alloy system for casing-casing annulus cement repair
US12228010B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2024 |
| Grant date | Feb 18, 2025 |
| Priority date | — |
| Expiry date | Jan 5, 2044 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B36/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method includes running a eutectic alloy system downhole in a wellbore including a first casing string and a second casing string therein, activating a differential valve tool within the second casing to generate a primary annular seal within a casing-casing annulus defined between the first casing string and second casing string, pumping a flushing fluid into the casing-casing annulus above the primary annular seal via a first ported collar, melting a eutectic alloy blanket into a molten alloy within the flushing fluid in the casing-casing annulus via a heater, solidifying the molten alloy to establish a supplemental seal above the primary annular seal in the casing-casing annulus between the first casing string and second casing string, and pumping cement into the casing-casing annulus above the supplemental seal to form a cement column in the casing-casing annulus via a second ported collar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.