a spring-actuated metal band or ring(ferrule) used to expand a liner patch when making casing repairs. See liner patch.

A remedial cementing operation designed to force cement into leak paths in wellbore tubulars. The required squeeze pressure is achieved by carefully controlling pump pressure. Squeeze cementing operations may be performed to repair poor primary cement jobs, isolate perforations or repair damaged casing or liner.

a cementing repair technique involving injecting cementing under pressure to fill channels in the primary cementing treatment.

a smaller well. Thought to be cheaper to drill, but much more expensive to repair or workover and often limited on fluid flow rate potential.

the maintenance work performed on an oil or gas well to improve or maintain the production from a formation already producing. It usually involves repairs to the pump, rods, gas lift valves, tubing, packers, and so forth

any equipment designed to be pumped down a completed well to effect a repair, modify the well’s flow, or for other reasons.

after the initial completion of a well, the action and techniques of reentering the well and redoing or repairing the original completion to restore the well’s productivity.

to make repairs or modifications on a tank, pipeline, or installation without shutting down operations.