Patent ID: 9677355
Date: 2017-06-13
CPC Classifications: B22F,B28B,C22C,E21B

Claim:
1. A method of operating an expandable apparatus for use in a subterranean borehole, comprising: disposing a triggering element comprising an at least partially corrodible composite material in a fluid flow path passing through a longitudinal bore of a tubular body of the expandable apparatus; seating the triggering element in a seat defined in the tubular body of the expandable apparatus; triggering the expandable apparatus responsive to the seating of the triggering element comprising moving at least one member of the expandable apparatus from a retracted position to an extended position; at least partially corroding a portion of the triggering element to at least partially remove the triggering element from the seat; moving the at least one member of the expandable apparatus from the extended position to the retracted position responsive at least in part to the at least partial removal of the triggering element; and after moving the at least one member of the expandable apparatus from the extended position to the retracted position: