a tool body having a flow path for a flow of liquid through the tool body, and at least an upper inner mandrel, a scraper body, and a scraper mandrel;

and

at least one scraper blade positioned on the scraper body, the scraper blade movable between a retracted position and a radially expanded position outward toward a wall of the wellbore, wherein the scraper blade moves in response to axial movement of the upper inner mandrel and the scraper mandrel relative to the scraper body in response to the flow of liquid through the flow path flowing in a direction from a surface of the wellbore to a bottom of the wellbore;

a first magnet; and

a second magnet, wherein the at least one scraper blade is movable between the retracted position and the radially expanded position based on movement of the second magnet relative to the first magnet;

wherein the tool body includes a bypass opening and the upper inner mandrel includes an internal bypass positioned uphole of the scraper body, wherein the bypass opening and the internal bypass align when the at least one scraper blade is in the radially expanded position, enabling fluid flow between the wellbore annulus and the flow path uphole of the at least one scraper blade.