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The Guide to Oilwell Fishing Operations, 2nd Edition by Joe P. DeGeare

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Chapter 18

Repair of Casing Failures and Leaks

Abstract

Leaks in casing have many causes. Among them are bursting or collapse from excessive pressure, thread leaks from improper makeup, corrosion holes, erosion from tubing leaks, and perforations that are longer than needed or desired.

Keywords

Collapsed casing

Lead-seal casing patch

Mechanical internal casing cutter

Squeeze cementing

Swage mandrels

Tieback alignment bushing

Leaks in casing have many causes. Among them are bursting or collapse from excessive pressure, thread leaks from improper makeup, corrosion holes, erosion from tubing leaks, and perforations that are longer than needed or desired.

The type of leak and its severity dictate the method of repair. The exact location of the ...

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