Downhole Shuttle Valve for Backflow Bypass and Solids Isolation
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Solution Overview
Problem
Downhole production strings with pumps and valves face maintenance challenges due to fluid conditions and velocities falling outside intended operating ranges, leading to fouling, plugging, and equipment damage, resulting in lost production and increased expenses.
Innovation Solution
A valve with a shuttle mechanism that includes a valve body, lid carrier, and seals, which manages flow by utilizing a spill port to isolate backflows and protect equipment from solids, and automatically adjusts to maintain operation under varying fluid conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pumps and valves are used to produce natural resources in hard to reach places, then production capability is improved, but maintenance difficulty increases and downtime results in lost production
Solution Approach 1:
The valve is divided into separable components including a valve body, a removable shuttle assembly, and a lid carrier that can be independently accessed. This segmentation allows maintenance personnel to service the valve by removing and replacing the shuttle assembly without having to access or disassemble the entire valve body, significantly reducing maintenance difficulty in hard-to-reach locations.
2Adaptability or versatility
If pumps and valves operate under varying fluid conditions and velocities, then adaptability is improved, but fouling and plugging increase when conditions fall outside intended operating range
Solution Approach 1:
The valve incorporates a movable shuttle assembly that can dynamically adjust its position within the valve body in response to varying fluid conditions. The shuttle can move to different positions to accommodate changes in fluid velocity and composition, allowing the valve to adapt to a broader operating range while maintaining reliable operation and preventing fouling by controlling flow patterns.
Solution Approach 2:
The valve design allows for changes in flow parameters such as velocity distribution and pressure gradients by adjusting the shuttle position. This enables the valve to maintain optimal flow conditions even when upstream or downstream conditions change, preventing the fluid conditions from falling outside the intended operating range that would cause fouling and plugging.
3Reliability
If multiple seals are used to limit flow between components, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
Multiple sealing functions are combined into integrated seal assemblies that are built into the shuttle and lid carrier components. Rather than using separate seal components for each interface, the design merges sealing functions into the structural components themselves, achieving high sealing reliability across multiple interfaces (valve body to shuttle, shuttle to lid carrier, etc.) while minimizing the total number of discrete seal parts.
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 valve effectively prevents fouling and plugging, reduces maintenance downtime, and extends the life of pumps and valves by isolating solids and redirecting flow to maintain operational efficiency even under abnormal conditions.
Implementation Method 1
a spring located between the lid carrier spring end and a spring base supported by the valve body
Implementation Method 2
a first seal limiting flow between the lid and the lid carrier, a second seal limiting flow between the valve body and the lid carrier, and a third seal limiting flow between the valve body and the lid carrier
Data Source
AI summary
A downhole valve to be used in a flow management system that comprises a valve inlet for coupling with a hydrocarbon reservoir pump outlet, a valve outlet for coupling with production tubing transport to the surface pumped hydrocarbons, a valve body with a valve body centerline that extends between the valve inlet and outlet, and a spill port for bypassing a backflow.