OXYGEN SCAVENGING METHODS AND ADDITIVES

摘要

This invention relates to methods and additives for scavenging oxygen dissolved and entrained in liquids which are particularly suitable for removing dissolved and entrained oxygen from polymer-containing fluids used in drilling and completing well bores as well as water flood and other procedures carried out in the oil field. The oxygen scavenging additive is sodium dithionite or a mixture thereof with sodium dithionate dispersed in a liquid carrier having the property of insulating the oxygen reactive materials from the atmosphere, such as a hydrocarbon.