Our company needs to select and incorporate internal protective coating materials and systems for corrosion control in tubular goods. The aim is to transport water and crude oil under harsh corrosive condition. These conditions include high salinity/high solids content "formation water", crude oil, carbon dioxide, hydrogen sulfide associated to erosion, high temperature and high pressure. For the selection we have also taken into account the coating application process, the transport, handling, storage and installation requirements, and the expected service life of the these tubular goods.
This paper describes the problems faced in the development of an internal coating system qualification program for tubular goods in onshore petroleum exploration and production fields, using available standardized testing methods, applied to high performance coatings available in the market. In addition
the paper describes the criteria adopted for the design of a testing plan.
In the qualification program we had to deal with two restrictions: a limited budget for the qualification tests and some of the available applicable standard tests which we consider do not fit completely forthe evaluation of our conditions. In this way, we have proposed a "design philosophy" for the testing and evaluation of the high performance coating systems, using a suitable minimal quantity of modified and non modified standard tests and non standard tests.
Key words: Coating qualification system, tubular, Internal protective coating, stress factor, standard, autoclave, flow loop, EIS, abrasion, thermal analysis, pull off strength, IR, wireline resistance, coating life.