Stepped Flow Conditioners for Pipe Assembly
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Solution Overview
Problem
Accurate fluid flow measurement in oil and gas pipelines is hindered by the distortion of fluid flow profiles due to elbows, tees, and other assemblies, leading to asymmetric and unstable flow conditions, which existing flow conditioners struggle to correct effectively.
Innovation Solution
A pipe assembly featuring two or more flow conditioners with a stepped configuration, each comprising a perforated plate with concentric rings of holes of unequal length, positioned in series perpendicular to the fluid flow, to redistribute fluid flow and achieve a fully developed profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If long lengths of uninterrupted straight pipe are used to achieve fully developed flow profile, then measurement accuracy is improved, but installation cost and space requirements increase prohibitively
Solution Approach 1:
The flow conditioner is divided into multiple segments or sections, each with progressively smaller hole diameters arranged in series. This segmentation allows the flow profile to be corrected in stages, achieving fully developed flow in a compact length rather than requiring a single long straight pipe section.
Solution Approach 2:
The invention transitions from a one-dimensional straight pipe approach to a multi-dimensional stepped configuration with holes at different radial positions and depths. This dimensional change enables compact flow conditioning by utilizing radial and axial variations in hole geometry to achieve the same effect as a much longer straight pipe.
2Measurement precision
If conventional flow conditioners are used to correct distorted flow profiles, then measurement accuracy is improved, but they fail to effectively correct severe distortions from elbows, tees, and valves
Solution Approach 1:
The stepped flow conditioner performs preliminary correction of flow distortions before the fluid reaches the meter. By progressively redistributing the flow through the stepped holes, it prepares the flow profile in advance, ensuring fully developed flow conditions are achieved even after severe disturbances from elbows, tees, and valves.
Solution Approach 2:
The invention changes key parameters of the flow conditioner including hole diameter, hole depth, radial position, and spacing between holes. These parameter variations create a stepped configuration that progressively corrects flow distortions, making it effective for severe cases where conventional uniform hole conditioners fail.
3Measurement precision
If multiple flow conditioners are installed in series to achieve better flow correction, then measurement accuracy is improved, but device complexity and pressure loss increase
Solution Approach 1:
The invention combines multiple flow correction functions into a single integrated stepped flow conditioner component. Instead of installing several separate conditioners in series, the stepped design with progressively smaller holes at different positions achieves cumulative correction效果 in one element, reducing pressure drop while maintaining accuracy.
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 stepped flow conditioners effectively correct fluid flow profiles, enhancing measurement accuracy and repeatability while reducing noise and swirl, and allowing for multistage correction of flow disturbances, thereby improving the performance of flow meters.
Implementation Method 1
The perforations or holes in the flow conditioner cause the fluid flow to be redistributed such that it forms a fully developed flow profile
Data Source
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AI summary
A pipe assembly for flow measurement characterized by a fluid flow pipe and two or more flow conditioners each having a stepped configuration and disposed in series within the fluid flow pipe in an orientation substantially perpendicular to an axis of the fluid flow pipe.