Class 417/117 - Valve biased open by static pressure of pumped fluid

Subclass of Class 417 - Pumps
Definition: Apparatus wherein said valve means comprises a valve member,
No. of patents: 4
Last issue date: 07/10/2007

Number	Title	Issue Date
7240739	Well fluid control A well conduit that has an aperture for communicating with a target reservoir and a one-way valve in the aperture may be used in injection and production wells. Other devices, systems, methods, and associated uses are also included in the present invention. For exam...	07/10/2007
6027313	Gas assisted fluid delivery system A fluid delivery system includes a pump, a fluid conduit and a regulated gas inlet. The fluid conduit has an upper end connected to the pump and a lower end in communication with a fluid supply. The regulated gas inlet includes a gas supply at a first pre...	02/22/2000
4111608	Gas lift system A casing pressured operated, variable orifice valve is employed as the operating valve in a single point injection well assembly with tubing pressure (fluid) operated unloading valves acting above the operating valve to provide a continuous flow system. T...	09/05/1978
4087207	Method and apparatus for gas induced production of liquid from wells A method of achieving gas induced production of liquid from wells wherein the wells have a production tubing string extending to a production formation wherein such wells may have insufficient gas production for achieving continuous production of liquids ...	05/02/1978

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