Dump Valve Pressure Relief Between Inline Valves
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Solution Overview
Problem
In zipper manifolds used for hydraulic fracturing, the pressure differential across inline valves can be insufficient due to trapped fluid columns, leading to valve leakage and reduced sealing effectiveness, which causes erosion and corrosion of sealing surfaces, resulting in operational inefficiencies and downtime.
Innovation Solution
A draining system is introduced, featuring a dump valve, pressure transducer, high-pressure hosing, and bleed-off reservoir to control pressure between inline valves, allowing for the removal of residual fluid and pressure within the chamber, ensuring proper valve sealing and reducing the risk of leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a column of fluid remains trapped in the chamber between two closed inline valves, then the fluid column builds pressure during wireline operations, but this pressure differential prevents proper valve sealing and causes leakage
Solution Approach 1:
The patent introduces a drain line that extracts the trapped fluid column from the chamber between the two inline valves. By removing the fluid that causes pressure buildup, the system eliminates the pressure differential that prevents proper valve sealing, thereby resolving the contradiction between maintaining valve reliability and controlling chamber pressure.
2Reliability
If the second valve remains in a neutral state during wireline operations, then the sealing mechanism is not energized, but this causes leakage across the valve and exposes sealing surfaces to erosion and corrosion
Solution Approach 1:
The patent applies preliminary anti-action by using the drain line to remove trapped fluid pressure before wireline operations begin. This preliminary action prevents the second valve from remaining in a neutral floating state, ensuring the sealing mechanism is properly energized before harmful factors like erosion and corrosion can affect the sealing surfaces.
3Reliability
If multiple inline valves are used to create dual barriers, then redundancy is provided to prevent pressure communication, but the trapped fluid column creates pressure differential issues that compromise barrier effectiveness
Solution Approach 1:
The drain line acts as an intermediary element that mediates the pressure differential issue between the dual barriers. By providing a drainage path for the trapped fluid, it enables both inline valves to maintain their barrier function with proper pressure differentials, resolving the conflict between having redundant barriers and maintaining precise pressure differential control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the reliability and durability of valves by maintaining a stable pressure differential, reducing downtime and equipment maintenance needs, thereby improving operational efficiency and profitability.
Implementation Method 1
a column of fluid remains in the system. This column of unpressured fluid gets trapped in a chamber between the pair of closed inline valves
Data Source
AI summary
A dump valve positioned between two valves inline valves, wherein the dump valve is configured to remove fluid and/or pressure acting upon the inline valves.