Twinned Inlet Distributor for Slug Flow Mitigation
Solution Overview
Problem
Existing fluid separation systems in crude oil production facilities face issues with vibrations and fatigue failures in feed pipes due to slug flow, poor water separation efficiency, short-circuiting, and intermixing of oil and water phases, leading to suboptimal crude oil and water quality.
Innovation Solution
A twinned inlet distributor device (TIDD) and staggered baffle arrangement within a cylindrical tank design that splits the incoming fluid stream into multiple paths, decelerates the flow, and guides liquids to maximize residence time and prevent phase intermixing, enhancing gas-liquid and liquid-liquid separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional inlet distributor is used, then the structure is simple, but vibrations and fatigue failures occur due to slug flow
Solution Approach 1:
The inlet distributor is segmented into multiple vertical riser pipes that distribute the fluid mixture separately, preventing slug flow vibrations while maintaining structural simplicity through modular repetition
Solution Approach 2:
The vertical riser pipes act as intermediary elements between the horizontal feed pipe and the separation chamber, mediating the flow to eliminate harmful vibrations while preserving the overall system simplicity
2Manufacturing precision
If a conventional inlet distributor is used, then the structure is simple, but water separation efficiency is poor
Solution Approach 1:
The distributor structure segments the incoming fluid into multiple vertical streams, increasing the effective separation path length and improving water separation efficiency without adding complex processing stages
Solution Approach 2:
The design transitions from a single horizontal flow path to multiple vertical flow paths, utilizing the vertical dimension to enhance separation efficiency while keeping the horizontal footprint compact
3Manufacturing precision
If a conventional inlet distributor is used, then the structure is simple, but short-circuiting of fluid mixture to outlet occurs
Solution Approach 1:
Multiple vertical riser pipes segment the flow paths, preventing direct short-circuiting by forcing the fluid to travel through distributed vertical channels before reaching the outlet region
Solution Approach 2:
The design uses vertical dimensionality to extend the effective flow path length, preventing short-circuiting in the horizontal plane while maintaining a compact overall structure
4Manufacturing precision
If a conventional inlet distributor is used, then the structure is simple, but intermixing of oil and water phases occurs
Solution Approach 1:
The vertical riser pipes segment the two-phase mixture into separate flow channels, reducing intermixing by limiting lateral interaction between oil and water phases during the distribution phase
Solution Approach 2:
Each vertical riser creates a localized flow region with specific hydrodynamic characteristics that promote phase separation, applying different flow conditions to different parts of the distributor
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 solution improves separation efficiency by reducing variance in residence time, minimizing eddy pockets, and preventing droplet shearing, resulting in higher quality crude oil and water production with reduced need for additional downstream processing equipment.
Implementation Method 1
The TIDD is oriented perpendicular to the inlet pipe such that the feed stream undergoes a change in flow direction within the tank that helps to separate gas from liquid and water from oil in the feed stream
Implementation Method 2
directs the liquids in a spread out, decelerated manner such that paths traversed by the streams to oil and water outlets of the tank are maximized
Implementation Method 3
The baffles, arranged in the staggered pattern, create a serpentine flow pattern across the tank that minimizes the variance in the residence time of the oil phase and the water phase within the tank
Implementation Method 4
minimizes the variance in the residence time, the staggered pattern of the baffles also minimizes larger pockets of eddies in the flow path
Implementation Method 5
minimizes larger pockets of eddies in the flow path, minimizes fluid flow dead zones within the cylindrical volume of the tank
Implementation Method 6
helps to coalesce droplets of the dispersed phases (for example, oil-in-water and water-in-oil) for better separation
Data Source
AI summary
A fluid separation system for separating fluids within a container includes an inlet pipe arranged within the container to receive an incoming fluid stream including first, second, and third fluids. The fluid separation system further includes a fluid distribution device coupled to the inlet pipe and including first and second distribution components for respectively separating the incoming fluid stream into first internal fluid streams and second internal fluid streams within the container. The first and second internal fluid streams each include the first, second, and third fluids. The fluid separation system further includes one or more walls arranged to guide the first and second internal fluid streams towards an outlet of the container. The fluid distribution device and the one or more walls together cause the first, second, and third fluids of the first and second internal fluid streams to separate from one another other upstream of the outlet.