Patent ID: 8657039

Claim:
A downhole apparatus for engaging a borehole in a subterranean formation, comprising: a tubular body having a longitudinal axis and defining a first bore; an actuation element defining a second bore, the actuation element slidably positioned within the first bore of the tubular body and configured to selectively retain an operable component of the downhole apparatus in an initial position; and a restriction element trap fixedly retained within the second bore of the actuation element for retentively receiving a restriction element, the restriction element trap comprising: a ball trap sleeve; and a tubular plug positioned in a downhole direction from the ball trap sleeve and having a portion thereof positioned adjacent to a portion of the ball trap sleeve to permanently prohibit movement of the ball trap sleeve in a downhole direction relative to the actuation element, wherein at least a majority of the ball trap sleeve and at least a majority of the tubular plug are positioned in the actuation element, and wherein the actuation element comprises an enlarged bore exhibiting an inner diameter proximate to the restriction element trap that is greater than an outer diameter of a portion of the restriction element trap to enable the portion of the restriction element trap to yield outwardly toward the actuation element upon receiving a restriction element.