PRODUCTION • PROCESSING • HANDLING
Surface Technology offers a range of coatings to inhibit corrosion
of satellite wells and subsea manifolds, all of which require specific attention to corrosion prevention. Any surface deterioration on the metal
products used in key applications can lead to premature and often sudden failure. In addition to corrosion, wear is another factor, typically from abrasion and impact, and while each is damaging enough on their own, they can combine to cause aggressive damage – pitting, roughening, grooves, dents, cavitation and cracking to name but a few. Individually, corrosion and wear are problematic; combined, the sum can be greater than the parts. In offshore oilfields, metal structures and components are under constant attack from a variety of sources from
drilling muds to water and carbon dioxide to acid. Much metal loss in oilfield casings is caused by crevice corrosion. Although corrosion will initially be uniform across the surface area of the metal, in time it will accelerate in any small crevice in the metal. Crevice corrosion often starts at drill-point joints, tubing or casing collars. Pitting equally causes vulnerability when a small scratch, impurity or deformity in the metal can start the corrosion process. Corrosion that starts with pitting can ultimately progress into cracks in the metal, which can be accelerated by tensile stress, resulting in stress corrosion. Corrosion fatigue, when metals are subjected to alternating stresses in a
Other benefits of deploying coatings include improved wear resistance and lower friction
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