High temperature coating resistant to damage from decompression

摘要

A coating for use in protecting surfaces susceptible to environmental degradation. The coating may be applied to metallic surfaces for providing a barrier against elements and/or ambient conditions that would otherwise degrade the surface material. The coating includes multiple layers, where a thermoplastic polymer is included, wholly or partly, within one or more of the layers. Example applications of the coating are for protecting valve seat seals and valve stem seals of a valve assembly used in conjunction with handling of fluids produced from a subterranean formation.

主权项

1. A method of coating a surface of a valve component comprising:
a. applying a base layer of a mixture of a primer and a thermoplastic to the surface; b. applying a thermoplastic layer on a side of the base layer opposite the side on the surface; c. applying an outer layer of thermoplastic and lubricant disposed on a side of the thermoplastic layer opposite the base layer; and d. actuating the valve so that the outer layer is in sliding contact with a metal surface.