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US 7,118,349 B2Granted
High pressure slurry piston pump
OwnerKenneth Doyle Oglesbyinventor
Life of this patent
Estimating the term…
Abstract
A high pressure slurry pump is described which automatically provides a clean fluid buffer around the intake and exhaust valves of the pump and in front of the pump piston in order to displace erosive slurry material and thus extend the life of the pump and improve pump efficiency.
Claims20
A slurry pump assembly comprising:
- a. an inlet chamber connected to a slurry supply;
- b. an intake valve, downstream of said inlet chamber, for admitting material into a piston cylinder;
- c. a control valve, connected to a clean fluid supply, configured to supply clean fluid into said inlet chamber;
- d. a piston in said piston cylinder for providing pressure;
- e. a means for driving said piston through an intake and exhaust stroke cycle;
- and
- f. an exhaust valve connected to said piston cylinder;
- for exhausting pressurized materials from said piston cylinder.
5 more elements
A slurry pump assembly comprising:
- a. an inlet chamber connected to a slurry supply;
- b. an intake valve, downstream of said inlet chamber, for admitting material into a piston cylinder;
- c. a piston in said piston cylinder for providing pressure;
- d. a means for driving said piston through an intake and exhaust stroke cycle;
- e. an exhaust valve connected to said piston cylinder;
- for exhausting pressurized materials from said piston cylinder;
- and
- f. a control valve, connected to a clean fluid supply, configured to supply clean fluid into the immediate vicinity of said intake valve and said exhaust valve.
5 more elements
A method to displace slurry material and place clean fluid across the intake and exhaust valves during the stroke cycles of a slurry piston pump assembly comprising the steps of:
- a. injecting a first specific volume of a clean fluid into the immediate vicinity of said intake and exhaust valves as a piston is initially withdrawn from a piston cylinder during a first portion of an intake stroke cycle, allowing clean fluid to buffer said intake and exhaust valves;
- b. flowing a slurry consisting of a solid material and a slurry carrier fluid through said intake valve and into said piston cylinder during a second portion of said intake stroke cycle;
- and
- c. injecting a second specific volume of clean fluid into the immediate vicinity of said intake and exhaust valves as said piston is withdrawn from said piston cylinder during a third and final portion of said intake stroke cycle, allowing clean fluid to buffer said intake and exhaust valves.
1 more element
Dependencies are inferred from the claim text.