Patent ID: 8783363

Claim:
A wellbore sealing assembly, the wellbore sealing assembly comprising; a sealing ring having an axis; an energizing ring concentric with the sealing ring and moveable between an upper and a lower position, the sealing ring and the energizing ring having mating cylindrical surfaces that slide against one another while moving from the upper to the lower position; an axially extending guide slot on one of the cylindrical surfaces; a recess in the guide slot of defining an upward facing shoulder; and a key extending from the other cylindrical surface, the key having a guide member and having a retainer stud portion extending through the guide slot into the recess, the key having a weak point, within the guide slot and at an entrance of the recess between the guide member and the retainer stud, so that a downward force on the energizing ring shears the retainer stud portion at the weak point to allow downward movement of the energizing ring relative to the sealing ring, and a portion of the key remains within the guide slot to prevent rotation of the energizing ring and sealing ring relative to each other as the energizing ring moves to the lower position.