Dennis F Westmoreland

7341108, Mar 11, 2008

Nov 26, 2003

10/724409

David Anthony Naizer - Snyder TX, US
Dennis Foy Westmoreland - Snyder TX, US

E21B 34/06
F01L 3/10
F16K 15/00

166374, 166321, 166325, 251337, 137535

A well downhole liquid dispenser is disclosed in which an inlet/discharge port assembly is provided having an inlet port in fluid communication with the shoulders of a conical piston. The point of the conical piston is in physical contact with the discharge channel leading from the center of the inlet/discharge port assembly to the discharge ports on the exterior of the inlet/discharge port assembly. The piston is held in place by an adjustable tensioning mechanism by which the pressure required to depress the piston may be varied to match the hydrostatic column pressure of a liquid column connected to the inlet port of the dispenser such that when the hydrostatic column pressure reaches a desired level, the piston is depressed, allowing fluid to flow from the liquid column regardless of the exterior downhole pressure exerted on the point of the piston through the discharge ports.

57758840, Jul 7, 1998

Jun 24, 1996

8/668857

Dennis F. Westmoreland - Snyder TX
Mark V. Zeck - Hermleigh TX

Y-Z Industries Sales, Inc. - Snyder TX

F04B 902

417383

The present invention discloses a modular diaphragm cartridge for use with a pump assembly. A cartridge body defines an interior chamber into which a piston is slidably connected. A spring biases the piston against a diaphragm placed over the end of the cartridge body to enclose the interior chamber. An end cap which threadedly engages the cartridge body to enclose the diaphragm between the end cap and body. The modular diaphragm cartridge may be removed from a pump housing as a single unit without the need for keeping track of multiple pieces. The present invention further discloses a modular inlet valve assembly, outlet valve assembly and plunger seal/guide cartridge.