METHOD AND APPARATUS FOR INJECTING PACKING INTO STUFFING BOXES FOR RECIPROCATING RODS

摘要

A stuffing box for a polished rod used with a downhole pump uses injectable packing to provide a seal around the polished rod. The stuffing box has a chamber for receiving the packing. The chamber has an opening to allow the addition of packing to the chamber. The packing is maintained in a compacted condition by either injecting additional packing through the opening or adjusting the volume of the chamber.