Crystallization suppressant combinations for high density clear brine fluids

US11525080B2 · kind B2 · utility

Assignee

• LANXESS Corporation · CA

Inventors

• Thomas G. Ray · Camden, US
• Colin H. Keene · Stephens, US
• David J. Sikora · Middlebury, US
• David W. Bartley · Camden, US
• John Warner · Houston, US
• Justin Whitfield · Billerica, US
• Dwight Tshudy · Salem, US
• Joni P. Williams · Medway, US

Key dates

• Filing date: Jul 30, 2020
• Grant date: Dec 13, 2022
• Expiry date: Jul 30, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/12
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compounds are identified that act as crystallization suppressants when added to clear brine fluids, significantly lowering the true crystallization temperatures of the brines, and allowing for higher salt content in clear brine fluids. The crystallization suppressants of the invention also allow for the preparation of higher density zinc free brines. Crystallization suppressant blends are also identified that allow for the preparation of high density clear brine fluids with lower viscosities.