CORROSION PROBLEMS IN BELOW-GRADE WELLHEAD EQUIPMENT AND SURFACE CASINGS

inspection of the below-grade wellhead equipment has shown corrosion d amage to the buried landing base, casing spools, and surface casing, e specially in water injection and supply wells in onshore fields in Sau di Arabia. In this paper, we describe the problem and examine possible reasons for the occurrence of corrosion. Procedures and standards tha t have been developed to regularly inspect all wens, perform the requi red repair work, and provide durable protection with field-applied cor rosion-resistant coating are also discussed in detail.