Transparent Acrylic Flow Unit for Gel Breakdown Analysis
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Solution Overview
Problem
Current technologies lack a comprehensive unit for accurately calculating the minimum pressure required to restart the flow of gelled fluids in pipelines after shutdowns, particularly in ultradeep water oil fields, and fail to adequately analyze the effects of wall slipping and shear forces on this process, leading to overestimation of restart pressures and unnecessary pipeline design costs.
Innovation Solution
A unit utilizing a Particle Image Velocimetry (PIV) system with two hydraulically connected reservoir tanks, a transparent acrylic main pipe, and a pressurization system to analyze the transient breakdown of gelled fluids, allowing for precise measurement of pressure and visualization of wall slipping and shear gradients, thereby determining the minimum restart pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used to estimate restart pressure, then pipeline design becomes robust and safe, but project costs increase and feasibility decreases
Solution Approach 1:
The patent replaces conventional mechanical pressure testing and estimation methods with a rheological characterization approach. By measuring yield strength through controlled shear stress application and analyzing the gel breakdown process rheologically, the system determines accurate restart pressure without relying on overestimation factors that increase pipeline design costs.
Solution Approach 2:
The patent changes the approach from estimating pressure based on empirical factors to directly measuring rheological parameters (yield strength, gel structure breakdown characteristics) and using these parameters to calculate precise restart pressure requirements. This parameter transformation enables accurate determination without excessive safety margins.
2Productivity
If higher restart pressure is applied to ensure flow resumption, then flow restart is guaranteed, but pipeline rupture risk increases
Solution Approach 1:
The patent implements a feedback mechanism where the actual gel breakdown process is monitored in real-time through rheological measurements. The restart pressure is determined based on the measured yield strength and breakdown characteristics, providing feedback-driven pressure control that prevents excessive pressure application and associated rupture risks.
Solution Approach 2:
The patent performs preliminary rheological characterization of the gelled fluid to determine its specific yield strength and breakdown behavior before establishing the restart pressure. This preliminary analysis enables setting the minimum required pressure accurately, avoiding both insufficient pressure (flow failure) and excessive pressure (rupture risk).
3Adaptability or versatility
If traditional experimental units are used to study fluid flow, then general flow characteristics can be observed, but transient regime and wall slipping effects cannot be adequately analyzed
Solution Approach 1:
The patent introduces a specialized rheological characterization system as an intermediary between the gelled fluid and the measurement process. This system includes controlled shear stress application devices and measurement instruments that specifically target transient regime behavior and wall slipping effects, enabling precise analysis of these phenomena that conventional flow units cannot capture.
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 unit provides more accurate and realistic data on the minimum pressure needed to restart flow, reducing pipeline design costs and preventing potential ruptures by accurately characterizing the gel breakdown process, thus enabling safer and more efficient operational conditions.
Implementation Method 1
a pressurization system, data acquisition software and a Particle Image Velocimetry (PIV) system
Implementation Method 2
analyze the transient breakdown of gelled fluids, allowing for precise measurement of pressure
Implementation Method 3
a Particle Image Velocimetry (PIV) system
Implementation Method 4
visualization of wall slipping and shear gradients
Data Source
AI summary
The present invention refers to a unit for viewing the time-dependent fluid flow restart, comprising two hydraulically connected reservoir tanks (1, 2); two auxiliary pipes (3); a main pipe (4) between the reservoir tanks (1, 2) and between the auxiliary pipes (3); a viewing box (15); a pressurization system (20); data acquisition software; and a particle image velocimetry (PIV) system (8); wherein the main pipe (4) is made of a transparent acrylic material that allows the viewing of the fluid inside the same; wherein the viewing box (15) encompasses the main pipe (4) and allows its viewing; and wherein the unit views the restart of the time-dependent fluid flow in transient regime.