Patent ID: 11920440
Assignee: RENEWELL ENERGY
Field: Civil engineering (Other fields)
Classification: CPC E  F  H  Y | IPC E  F  H

Claim 0:
1. A method for retrofitting a well, comprising:
installing a potential energy conversion system into an interval of a non-producing well having a wellhead located at the earth's surface, the potential energy conversion system comprising a movable mass suspended by a line in the non-producing well, and the line being coupled to a motor operable to lift the movable mass and a generator operable to produce electricity when lowering the movable mass within the interval;
introducing a fluid into the interval of the non-producing well;
wherein the fluid comprises an additive, and the additive is selected to minimize corrosion, modify rheological properties, reduce friction, convey biocidal activity, or inhibit scale; and

capping the non-producing well after installing the potential energy conversion system therein.