Sulfate scale inhibition in high pressure and high temperature applications
US11434412B2 · kind B2 · utility
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11References
20Claims
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Key dates
| Filing date | Feb 27, 2017 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Nov 30, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods are provided to inhibit scale formation in oil or gas production systems. In one embodiment, the scale inhibiting treatment comprises: A) an AAA terpolymer and B) a phosphonate. The treatment can be added to these systems in the well area itself, to the well annulus and its associated tubes, casings, etc., to the oil or gas bearing subterranean formation, to injection conduits for injecting steam or fracking fluid to the subterranean formation, to the produced water or to equipment in fluid flow contact with the produced water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.