Harbison-Fischer, Inc.

Ian Douglas Rimmer

Benny J Williams

Mark William Mahoney

Bradley Craig Rogers

Justin Conyers

A downhole pump has a barrel and plunger. The barrel has a first one-way valve and the plunger has a second done-way valve. The plunger reciprocates with respect to the barrel. The plunger has a first end which has a tapered leading edge. Ports are adjacent to the leading edge. The ports communicate with a passage in the plunger. A sucker rod string coupling is located at the plunger first end. The sucker rod string coupling is coupled to walls located between the ports. The end of the sucker rod string coupling that is coupled to the plunger is tapered so that fluid can flow out of the ports. The sucker rod string coupling and the plunger first end form an integral member that couples to the remainder of the plunger.

Sand plunger for downhole pump

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.

Method and apparatus for injecting packing into stuffing boxes for reciprocating rods

A guide to support a shaft such as a pump pull rod ( ) which is capable of both rotary and reciprocal motion. The guide prevents any misalignment of rod ( ) damaging a seal, e.g. a stuffing box, held in space ( ). Guide element ( ) has central portion ( ) and annular flange ( ). Element ( ) can move laterally with respect to housing ( ) and can also pivot, along with the cap ( ) of the housing ( ), with respect to the lower portion ( ) thereof. The latter is achieved via movements of part-spherical bearing element ( ) and similarly shaped faces ( ) of housing . Further seals ( ) prevents entry of pumped fluid into chamber ( ).

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Woodvale, Australia

Ian Douglas Rimmer