Corrosion and scale inhibition compositions and methods of use thereof

Abstract

Improved multi-component compositions are provided for treating metallic surfaces subjected to contact with hydrocarbons, such as producing well casings and downhole equipment, and transmission lines. The compositions include an epoxy, a cross-linking or curing agent for the epoxy (e.g., ethoxylated tallow amine), and a scale inhibitor including phosphonic acid or phosphonate moieties (e.g., an organic phosphonate such as DETA phosphonate). The compositions may be added to a well or transmission line as a unitary, three-component mixture, or the epoxy may be initially added, followed by the cross-linking or curing agent, and the scale inhibitor. The compositions provide long-term scale inhibition without the need for continuous metered addition of scale inhibitor

Dependencies are inferred from the claim text.