Expandable liners protect permeable zones in Russian oil wells

Expandable-profile liners have successfully isolated and protected permeable hydrocarbon zones in Russian oil wells, minimizing formation damage from invasion of drilling fluids and cement slurries.By minimizing formation damage with expandable liners, the operating company OAO Tatneft has improved production rates by as much as 1.4-2 times the flow from wells completed with conventional cemented liners.Protecting possible producing formations from cement slurry and drilling fluid invasion is one of the most important well-construction objectives. Expandable-liner installations, without behind-the-liner cementing, have proven effective in improving well performance.Shallow zonesWells in m...

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