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AssigneeSPM Oil & Gas Inc.
InventorsChandu Kumar, Joe Allen Sutton, Wesley P. Clark, John McCrady, Richard David Peer, Bryan Wagner
Estimating the term…
An intermittent flushing plunger packing assembly is described herein. The packing assembly includes a plurality of annular seals disposed about the plunger configured to reciprocate along a linear axis within the fluid bore of the pump, and an annular packing nut disposed circumferentially about the plunger and configured to retain the plurality of annular seals and adjust a combined height of the plurality of annular seals. A selected one of the plurality of annular seals proximate to the fluid cylinder of the pump has a flushing fluid chamber in fluid communication with a flushing fluid port coupled to a first one-way check valve allowing a pressurized flushing fluid to be introduced and retained within the flushing fluid chamber and creating a fluid barrier to prevent frac fluid in the fluid cylinder from bypassing the annular seals.
A packing assembly for a plunger in a fluid bore of a reciprocating pump, the packing assembly comprising:
A method of operating a reciprocating plunger in a pump, comprising injecting a pressurized flushing fluid into a flushing chamber defined within a selected one of a plurality of annular seals disposed about the plunger in a fluid bore of the pump during at least a retraction portion of a stroke performed by the plunger, wherein injecting the pressurized flushing fluid into the flushing chamber defined within a selected one of a plurality of annular seals comprises injecting the flushing fluid into the flushing chamber of an annular seal that is closest to a fluid cylinder of the pump.
A method of operating a reciprocating plunger in a pump, comprising injecting a pressurized flushing fluid into a flushing chamber defined within a selected one of a plurality of annular seals disposed about the plunger in a fluid bore of the pump so that a pressure of the flushing fluid in the flushing chamber is greater than a pressure in a fluid cylinder of the pump during a retraction portion of the stroke performed by the plunger, wherein injecting the pressurized flushing fluid into the flushing chamber defined within a selected one of a plurality of annular seals comprises injecting the flushing fluid into the flushing chamber of a flushing cavity ring disposed adjacent to the fluid cylinder of the pump.
A reciprocating pump having a fluid end having at least one plunger configured to reciprocate along a linear axis within a fluid bore, the pump comprising:
Dependencies are inferred from the claim text.