Patent ID: 8844635
Filing Date: 2014-09-30
Classification: B22F,B28B,C22C,E21B

Abstract:
1. An expandable apparatus for use in a subterranean borehole, comprising: a tubular body having a longitudinal bore and at least one opening in a wall of the tubular body; at least one member positioned within the at least one opening in the wall of the tubular body, the at least one member configured to move between a retracted position and an extended position; and a triggering element comprising a composite material, the composite material comprising a discontinuous metallic phase dispersed within a corrodible matrix phase, the metallic phase comprising a metal or metal alloy, a majority of the corrodible matrix phase comprising at least one of a ceramic and an intermetallic compound, a majority of the at least one of the ceramic and the intermetallic compound comprising magnesium and at least one of aluminum and nickel.