Patent ID: 7513977

Claim:
A drill stem guide assembly for insertion of a drill stem into a coke drum for coke cutting operations, comprising: a plurality of covers moveable between an open position and a folded closed position, each of the plurality of covers comprising: a guide section elongate to extend along a segment of the drill stem when the covers are in the folded closed position; a mounting frame configured to pivotally attach the plurality of covers, the covers being pivotally attached to the mounting frame with each cover pivoting between the open and folded closed positions, the pivoting being about pivot axes that are transverse to the elongation of the guide section and the drill stem when the covers are in the folded closed position; and a plurality of actuators disposed on the mounting frame to move the plurality of covers between the open position and the folded closed position, wherein, when the plurality of covers is in the folded closed position, the guide sections of the plurality of covers form a passageway for guiding the drill stem as the drill stem is moved within the coke drum.