This paper presents results from comparative laboratory tests of seven internal plastic coatings evaluated by an integrated oil company for corrosion control in sweet oil well tubing. Tests were performed on products that had been recommended for the company’s typical South Louisiana and Gulf of Mexico oil production by coating applicators. The
coatings evaluation program included autoclave, rocker arm, acid resistance, wireline abrasion, impact resistance, external deformation and surface roughness tests. Tests were designed to compare coating performance under harsh conditions such as high water production, temperatures up to 300°F ( 149°C), and high carbon dioxide gas concentration. Test results showed substantial performance differences between the internal coatings, and no single coating performed best in all tests. Keywords: internal plastic coatings, carbon dioxide, sweet production, autoclave test, acid resistance, wire line abrasion resistance, impact resistance, external deformation, surface roughness, oil well tubulars