Alternative Approach to Liner Top Repairs

Abstract

Leaking and compromised liner tops have been a common ongoing problem in the oilfield. A poor cement job around the liner top can not only lead to gas or fluid migration from non-productive zones during the lifecycle of the well but can also severely limit remediation abilities by resulting in lower than desired frac pressures if the leak is substantial. The existing solution which involves squeezing cement is not only notoriously difficult but is also unreliable, time consuming, equipment heavy and fails to provide a gas tight seal if needed. This has over the years resulted in a very high number of leaking liner tops, a problem which needs a quick and reliable solution.