ESeal™ Liner Restores Wellbore Integrity in Canadian Gas Plant Well; Saves Replacement Well Costs

Summary:

Challenge

A cavern well in Fort Saskatchewan, Alberta needed to be remediated due to a leaking casing connection as well as another connection showing signs of fatigue that could result in a leak if not addressed. The Operator needed a quick solution to isolate the leaking connection as well as the fatigued section that would provide a gas tight isolation for the Nitrogen MIT test, restoring integrity to the well and save the cost of drilling a replacement well.

Solution and Results

SubTerra Engineering worked carefully with the Operator to determine the best, most cost-effective solution to restore integrity to the well. A 50m (164 ft) 11-3/4 in.ESeal Solid Expandable Liner was installed in the well located within a gas plant and expanded to cover the entire section.  The ESeal Liner was fitted with three Viton Elastomer seals above and below each liner connection to cover both leaking casing connections in the 13-3/8 in. casing to provide a gas tight solution for the Nitrogen MIT test.  A proper MIT test with nitrogen was successfully completed to the desired pressure rating and confirmed isolation and restored well integrity.

By deploying an expandable liner system, the Operator saved the high cost of drilling a new well or sidetracking.

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Overview
Document Type
Case History
Date Published
Region
North America, Canada, Alberta

Additional Document Information

Environment:
Land
System Plan:
Planned
System Type:
ESeal, ESeal Liner
Values Added:
Maximize ID and TD, Avoid replacement well/sidetrack
Casing Size:
13 3/8"
Expandable Size:
11 3/4"
Liner Length:
251-1000'