Severe Service Metallic Clad Casing and Wellhead Components

Abstract

Recent advances in powder metallurgy have made possible the development of large diameter, high strength, severe service product, as a cost effective alternative to those produced by conventional cast, wrought or mechanical bonding processes. The methods are reviewed for producing these metallurgically bonded products with excellent corrosion resistance, and the property data from several specific examples is presented. Also discussed are the size and shape flexibility of items produced via powder metallurgy, and the ease of changing alloys to meet specific well conditions. These products are ideally applied to areas with inherently corrosive environments, or those areas requiring the use of corrosive inhibitors to control the buildup of solids such as salt and silica. Whether small or large, these products have adequate strength to withstand the tensile stresses created by string weight, as well as the compressive stresses created by temperature changes, even under cemented in conditions.