METHOD FOR REDUCING EROSION AND CORROSION OF METAL SURFACES DURING GAS DRILLING

摘要

Erosion and corrosion of metal surfaces exposed to a flowing stream of hot gases containing dispersed particles of solid material is reduced by introducing into the flowing stream an additive that decomposes at the temperature and pressure of the gas to release ammonia or a vaporous amine and form a resinous residue. The additive is preferably introduced into the gas in an inert carrier liquid. The method is especially useful in reducing erosion and corrosion of metal drill pipe used in the gas drilling of wells into high temperature earth formations, such as are encountered in gas drilling wells into subterranean steam-bearing formations.