Dissolving barium sulfate scale with aqueous solutions of salts of phosphomethyl and amino-substituted macrocyclic polyethers

Patent · Tue Sep 08 04:00:00 EDT 1981

OSTI ID:5777946

Van Zon, A

Barium sulfate scale can be removed from remote locations such as those in or around the borehole of a well extending into a subterranean earth formation by contacting the scale with an aqueous solution consisting essentially of water, a monovalent cation salt of a macrocyclic polyether containing at least two nitrogen-linked phosphomethyl groups and enough monovalent basic compound to provide a solution ph of about 8.

• Assignee: Shell Oil Co
• Patent Number(s): US 4288333
• OSTI ID: 5777946
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150903* -- Geothermal Engineering-- Corrosion
Scaling & Materials Development
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AMMONIUM COMPOUNDS
AQUEOUS SOLUTIONS
BARIUM COMPOUNDS
BARIUM SULFATES
BOREHOLES
CAVITIES
CONTROL
DISPERSIONS
GLYCOLS
HYDROXY COMPOUNDS
LITHIUM COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PH VALUE
POLYETHYLENE GLYCOLS
POLYMERS
POTASSIUM COMPOUNDS
REMOVAL
SCALE CONTROL
SCALING
SODIUM COMPOUNDS
SOLUTIONS
SULFATES
SULFUR COMPOUNDS
WELLS