Browse Prior Art Database

Use of Downhole Pump to Charge an Accumulator With Dissimilar Working Fluids

IP.com Disclosure Number: IPCOM000242361D
Publication Date: 2015-Jul-09
Document File: 1 page(s) / 38K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention is an apparatus and method to use a downhole pump which moves borehole fluid to charge a hydraulic accumulator. It is advantageous to have a supply of hydraulic energy without needing a second downhole pump only to pressurize hydraulic fluid. Such energy would be used to do work, such as (but not limited to) hydraulically shifting valves, or deploying pistons on demand.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 77% of the total text.

SMP4-58889-US

Title:  Use of Downhole Pump to Charge an Accumulator With Dissimilar Working Fluids

Abstract:  This invention is an apparatus and method to use a downhole pump which moves borehole fluid to charge a hydraulic accumulator.  It is advantageous to have a supply of hydraulic energy without needing a second downhole pump only to pressurize hydraulic fluid.  Such energy would be used to do work, such as (but not limited to) hydraulically shifting valves, or deploying pistons on demand.

Description:  Figure 1 shows the schematic circuit elements of the invention on the primary side of the circuit a reciprocating pump (1) driven by some means, (2) and containing chambers (9) and (10) separated by a sealed piston (8) moves borehole fluid alternatively through flowlines  (11) and (12) fluidly connected to the pump (1).  Such a downhole reciprocating pump will be familiar to anyone skilled in the art, and the pump would ordinarily move fluid while the piston (8) traverses between “A” and “B” and from “B” back to “A”.  The novel feature of this pump is that chamber (10)  has extra volume between “B” and “B”.  When the piston (8) “overtravels” between “B” and “B”, an actuating member (13) contacts a fluidly separated secondary part of the circuit which uses hydraulic oli as the working fluid.  As the piston overtraels toward B, an actuating member (13) depresses a plunger (3) forcing fluid through check valve (4A) and charging...