Browse Prior Art Database

Multiple Actuation High Pressure control Valve System for Functioning a Downhole Piston

IP.com Disclosure Number: IPCOM000128969D
Publication Date: 2005-Sep-23
Document File: 2 page(s) / 11K

Publishing Venue

The IP.com Prior Art Database

Abstract

Introduction: The challenge is to develop a downhole hydraulic control valve system to alternately direct fluid pressure from the high pressure region to one side of a piston and the opposite side of the piston will be connected to the low pressure region. The high pressure will first be directed to one side of the piston and then the other side, with the low pressure directed to the opposite side of the high pressure. The high pressure region can be up to the desired operating pressure of the system and the low pressure region can have a pressure of zero to any valve under the high pressure region. The first of the 3 way – 2 position valves controls which side of the piston the high pressure region is connected. The second valve controls which side of the piston the low pressure region is connected. The full differential pressure (the differential between the high and low pressure regions) is held by each of the two 3 way – 2 position valves of the control valve system. When the valves are operated the full differential pressure is instantaneously released. Substantial force and length of travel can be accomplished by the sizing of the piston area and the length of the supporting components.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 2

Title: Multiple Actuation High Pressure control Valve System for Functioning a Downhole Piston

Introduction: The challenge is to develop a downhole hydraulic control valve system to alternately direct fluid pressure from the high pressure region to one side of a piston and the opposite side of the piston will be connected to the low pressure region. The high pressure will first be directed to one side of the piston and then the other side, with the low pressure directed to the opposite side of the high pressure. The high pressure region can be up to the desired operating pressure of the system and the low pressure region can have a pressure of zero to any valve under the high pressure region. The first of the 3 way - 2 position valves controls which side of the piston the high pressure region is connected. The second valve controls which side of the piston the low pressure region is connected. The full differential pressure (the differential between the high and low pressure regions) is held by each of the two 3 way - 2 position valves of the control valve system. When the valves are operated the full differential pressure is instantaneously released. Substantial force and length of travel can be accomplished by the sizing of the piston area and the length of the supporting components.

Problem with Prior Art - Current Technology: Current methods to control pressurized fluid require the use of elastomer or polymer seals to dynamically release the pressure with the full differential across the seal. All of the seal materials that have been tested to date get cut by the fluid flow resulting from the release of this high differential. Achieving multiple cycles, forward and backward movement of the piston, consistently and for the required number of cycles limits the current method. The current design functions at 5,000 psi differential for a limited time (20 cycles) and is non-functional at 7,500 psi or above (1-2 cycles).

Objective: The objective is to develop a hydraulic control...