WELL TOOLS OPERABLE VIA THERMAL EXPANSION RESULTING FROM REACTIVE MATERIALS

摘要

Methods of actuating a well tool can include releasing chemical energy from at least one portion of a reactive material, thermally expanding a substance in response to the 5 released chemical energy, and applying pressure to a piston as a result of thermally expanding the substance, thereby actuating the well tool, with these steps being repeated for each of multiple actuations of the well tool. A well tool actuator can include a substance contained in a chamber, one 10 or more portions of a reactive material from which chemical energy is released, and a piston to which pressure is applied due to thermal expansion of the substance in response to each release of chemical energy. A well tool actuator which can be actuated multiple times may include 15 multiple portions of a gas generating reactive material, and a piston to which pressure is applied due to generation of the gas. - - 12 30-- - A - 40 -- -- 14