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Title: Casing Repair At A Cavern Gas Storage Field
Author: Brad Hollenbaugh
Source: American Gas Association 1991
Year Published: 1991
Abstract: Damaged casing was repaired at two wells in the Leyden Gas Storage Field. Logging technology was instrumental in locating the casing damage, identifying the extent of the damage, and assuring a successful repair. Repair was made by installing a liner between two packers with one packer set above the damage and one set below it. The Leyden field is different than a typical underground storage field in that it was once an underground coal mine. The storage depth is between 800 and 1100 feet below the surface. Special equipment and procedures are required for workover and drilling operations because of the complications associated with cavern storage.

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