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A casing patch is a downhole assembly or tool system used in the remedial repair of casing damage, corrosion or leaks.
Casing patches are most frequently used as short-to medium-term repairs that enable production to be resumed until a major workover operation is scheduled.
In some cases, such as in depleted wells nearing the end of viable production, a casing patch may be the only economic means of safely returning the well to production.
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