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Reciprocating pump dump valve and methods of use

Imported: 24 Feb '17 | Published: 06 Jan '04

Roy R. Vann

USPTO - Utility Patents

Abstract

A reciprocating pump dump valve and methods of use for utilization in the hydrocarbon industry. The device is preferably used with barrel pumps although it may be used with tubing pumps. The device is positioned at the bottom of the wellbore immediately above the stinger and immediately below the standing valve and allows for complete dumping of the hydrostatic head in the production tubing whenever the tubing must be pulled.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of the barrel of the instant device showing the entry shear pin.

FIG. 2 is a cross-sectional view of the piston, safety ring and head of the instant device showing the safety shear pin.

FIG. 3 is a cross-sectional view of the instant device in its “entry” position.

FIG. 4 is a cross-sectional view of the instant device after being taken out of entry or in its “cocked” position.

FIG. 5 is a cross-sectional view of the instant device in its “dump” position and ready to come out of the well.

FIG. 6 is a simplified illustration of a wellbore showing the production tubing, a series of sucker rods terminating in a pull rod that is connected to a pump plunger that in turn operates within a pump barrel, and the instant invention connected at the bottom of the pump barrel.

FIG. 7 is a cross-sectional view of a fishing neck attachment used in tubing pump applications.

FIG. 8 is a cross-sectional view of the instant device in its “dump” position, showing the spring designed to hold the device in its dump position.

Claims

1. A method for completely dumping the hydrostatic head in production tubing having a hold-down using a downhole dump valve attached below a pump having associated means for driving the pump for servicing operations comprising:

2. A method for completely dumping the hydrostatic head in production tubing having a hold-down using a dump valve in an oil well using a tubing pump for servicing operations comprising:

3. A method for completely dumping the hydrostatic head in production tubing having a hold-down using a dump valve and a hold-open spring in an oil well using a tubing pump for servicing operations wherein fluid may be entrapped in the production tubing comprising: