Abstract: A rotation converter configured to convert an alternative clockwise-counterclockwise rotation to a single rotation direction, including: a hex shaft including an input hex, an output hex, and a gear contact, wherein the input hex and output hex are separated by the gear contact; a hex mover coupled to the input hex, wherein the hex mover includes following teeth and driving teeth; a following ring gear in contact with the following teeth; a driving ring gear in contact with the driving teeth; one or more gear pinions in contact with the following ring gear and the driving ring gear; one or more gear rods configured to support the one or more gear pinions; and a gear holder coupled to the one or more gear rods.

Abstract: A motor system including: a cylindrical body; a converter configured to convert a two-directional rotation into a one-directional rotation; a rotatable shaft configured to be (a) disposed inside of the cylindrical body, (b) rotatable in both a counterclockwise direction and a clockwise direction, and (c) coupled to a drill bit through the converter; a driving piston configured to be coupled to the rotatable shaft and configured to divide the cylindrical body into a first chamber and a second chamber; and a flow piston configured to change flow direction of the fluid within the cylindrical body to drive the driving piston, wherein the driving piston is configured to be driven by the fluid via a pressure difference to move in a forward direction and in a reverse direction.