Addressing downhole metal oxidation issues
Oilfield well tubulars must cope with corrosive liquids and salted water. Metal oxidation can appear as from 6 months, due to the casing exposure to corrosive fluids. If not treated, a corroded casing or tubing might be a real danger for the environment. The casing corrosion causes leaks and migrations into the formation, that present serious risks of groundwater contamination. It also means drastic drops in production. An underestimated case of corroded casing may certainly lead to well workover operations or to a well plug and abandonment decision.
Solution – Corroded casing repair
Casing repair techniques with Saltel Xpandable steel Patch. Saltel’s expandable steel casing patch allows restoring casing integrity*, optimizes the well’s production, and prevents fluid or gas migrations in the annulus. The Patch, once set, leaves large ID access to the well for most standard downhole tools. Saltel Patch is a pressure-resistant inner lining that allows the end-user to avoid plug and abandonment decisions which helps in corroded casing repair.
Case Study : Corroded casing repair in a mature (1947) gas well – Texas, USA
Corroded casing repair in a mature (1947) gas well – Texas, USA Context Gas flowing wells in the Texas Hugoton field have a very low bottom-hole pressure. A casing leak…
*See also damaged casing