Design of an Internal Onshore Coating System Qualification Program for Tubular Goods

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 conditions.  These conditions include high salinity/high solids content "formation water" , erosion, high temperature, high pressure, carbon dioxide, hydrogen sulfide and crude oil.    For the selection we have also take into account the coating application process, transport , handling, storage and installation requirements and the expected life of these tubulars under service.

This paper describes the problems faced in the development of internal coating systems qualification for tubular goods in onshore petroleum exploration and production fields, using available standardized testing methods, and employing high performance coatings available in the market.  In addition describes the criteria adopted to design 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 to evaluate our conditions.   In this way we proposed a "design philosophy" for high performance coating systems testing and evaluation using a suitable minimal quantity of modified and non modified standard tests.