Downhole power generation using pressure differential

An apparatus for generating electrical power, the apparatus comprising:

• at least one power generation assembly including:
• a housing including a fluid chamber configured to exchange or receive a fluid;
• one or more conductive coils surrounding the fluid chamber;
• and
• a reciprocating magnetic shuttle disposed in the fluid chamber and dividing the fluid chamber into a first volume and a second volume;
• a first conduit connected to the first volume, and a second conduit connected to the second volume, the first conduit and the second conduit in fluid communication with a tubular conduit through which a borehole fluid is circulated, the tubular conduit configured to receive an object deployed with the borehole fluid at a location in the tubular conduit, the object causing a pressure differential between a section upstream of the object and a section downstream of the object;
• and
• at least one switching assembly configured to alternate between a first operating state and a second operating state, wherein the first conduit is in fluid communication with a first fluid pressure source including fluid having a first pressure, and the second conduit is in fluid communication with a second fluid pressure source including fluid having a second pressure when the apparatus is in the first operating state, and the first conduit is in fluid communication with the second fluid pressure source and the second conduit is in fluid communication with the first fluid pressure source when the apparatus is in the second operating state, wherein the first fluid pressure source includes the section upstream of the object and the second fluid pressure source includes the section downstream of the object;
• wherein the switching assembly is configured to alternate between the first operating state and the second operating state to alternate a direction of a differential pressure between the first volume and the second volume and cause the magnetic shuttle to move in a reciprocating motion and generate an electric current in the one or more conductive coils.