US Patent 10190394 Energy harvesting from a downhole jar

A system for harvesting energy from the operation of a downhole jar is disclosed. The system converts the kinetic energy associated with the operation of the jar to electrical energy by associating the relative movement between a magnet and a coil to the relative movement between a movable member and a stationary member in the jar. Electrical energy is generated in the coil as a result of the relative motion between the magnets and the coil. This electrical energy may be stored in an electrical energy storage subsystem and provided to a downhole tool for use in the wellbore. The downhole tool may be used to power other tools, to take measurements, to communicate with other devices, to actuate other devices, and to otherwise control such other devices.