High-Flow Insert Safety Valve With Pressure-Neutralizing Chamber
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Solution Overview
Problem
Existing safety valves in boreholes suffer from wear and tear, leading to incomplete closure and uncontrolled fluid flow, while conventional insert valves reduce flow rates, are prone to similar wear, and have depth limitations due to hydraulic control mechanisms and seals.
Innovation Solution
An insert valve design that allows fluid flow around the closure mechanism, with a centralized piston system and hydraulic controls disposed uphole, minimizing seals and incorporating a pressure chamber to neutralize external forces, enabling efficient fluid control at various depths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional insert valve is used to control fluid flow, then fluid flow control is achieved, but flow rate is reduced
Solution Approach 1:
The insert valve is divided into separate functional components: a valve body with flow ports, a closure mechanism with poppet and seat, and a piston system. This segmentation allows the flow path to be optimized for high flow rate while the closure mechanism maintains effective flow control when needed.
Solution Approach 2:
The insert valve is designed to be installed within the borehole environment, nesting the valve components within the available space while maintaining full flow capacity when open and effective closure when closed.
2Reliability
If hydraulic control mechanisms and seals are used in insert valves, then fluid flow control is achieved, but depth limitations occur due to wear and tear
Solution Approach 1:
The hydraulic control mechanisms and seals are extracted from the downhole environment and positioned uphole, removing the wear-prone components from the harsh deep-borehole conditions. This allows the insert valve to operate reliably at greater depths without seal degradation.
Solution Approach 2:
A pressure chamber is introduced as an intermediary mechanism to transmit control forces to the closure mechanism without requiring seals or hydraulic components at depth. The pressure chamber neutralizes external forces and enables reliable operation in high-pressure deep-borehole environments.
3Device complexity
If the closure mechanism is centrally positioned for compact design, then device complexity is reduced, but fluid flow control efficiency may be compromised
Solution Approach 1:
The piston rod and closure mechanism are merged into a centralized assembly, reducing the number of separate components and simplifying the overall valve structure while maintaining effective flow control through the strategically positioned poppet and seat.
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
The insert valve design maintains high flow rates and effective fluid control by minimizing seal wear and accommodating varying borehole pressures, overcoming depth limitations and maintaining operational reliability.
Implementation Method 1
incorporating a pressure chamber to neutralize external forces, enabling efficient fluid control at various depths
Data Source
AI summary
An insert valve configured to be installed, at least partially, in a safety valve in a borehole that includes a flow port disposed on an exterior of the insert valve, a poppet configured to control a fluid flow through the flow port, an upper piston rod, disposed uphole from the poppet, configured to move the poppet past at least part of the flow port, and a chamber, disposed downhole from the poppet that includes a chamber pressure, and a lower piston rod coupled to the poppet, where the lower piston rod is configured to exert a chamber piston force on the poppet.