TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The system also comprises a motor driven by the fluid flowing through the conduit. The system provides mechanical motion output, electrical power storage device coupled to the generator for strong electricity produced by the generator, and controller, receiver, flow control valves coupled to conduit and controller, operative device(s) coupled to and powered by electricity stored in the power storage device, and casing lining the well. The motor is hydraulically driven turbine. The controller is coupled to power storage device and electrical generator. The electrical generator controls the flow of fluid through the conduit to maintain a minimum level of power in the power storage device. The electrical generator is mechanically coupled to and is driven by the motor. The packer comprises seal (16). The conduit passes through the seal. The conduit comprises sleeve around the production tubing and between packer and production tubing. The packer is sealed between production tubing and casing. The casing has a first port above packer and a second port below the packer. The conduit is positioned outside the case and connected between first and second ports. The well is uncased. The system can also comprise conduit and hydraulically driven actuator coupled to the conduit. The control valve permits or stops fluid flow through the conduit in response to signals from the controller. The receiver is coupled to the controller receiving control signals transmitted from the surface location of the well. The receiver provides signals to the controller receiving control signals transmitted from the surface location of the well. The receiver provides signals to the controller causing it to permit or stop fluid flow through the conduit. The hydraulically driven device is a motor or actuator.Preferred Process: The process also comprises flowing fluid from above the packer to hydraulically driven device located in the well below the packer, flowing fluid from above the packer to a hydraulically driven device located in the well below the packer, and coupling mechanical motion from the actuator to mechanically operated device in the well.