Horizontal Desander Baffles for Sand Separation
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Solution Overview
Problem
Existing desander technologies, such as vertical sand traps and hydrocyclones, are inadequate in efficiently removing particulate matter like sand from fluid streams in oil and gas operations, as they can damage equipment and are inefficient in mature oil and gas fields where sand production increases.
Innovation Solution
A horizontal desander with internal baffles and ribs that redirect the fluid stream to facilitate the separation of particulate matter, featuring an inlet baffle to disrupt flow and outlet baffle to impede laminar flow, ensuring effective settling of sand at the bottom of the vessel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vertical sand traps or hydrocyclones are used to remove sand from fluid streams, then sand separation is achieved, but equipment damage and erosion occur due to high-velocity sand-laden flows
Solution Approach 1:
The vessel is divided into multiple functional zones using baffles: an inlet zone with a first baffle to dissipate high-velocity flow, a separation zone with bottom baffles for sand accumulation, and an outlet zone with a second baffle to protect the discharge. This segmentation isolates the harmful high-velocity flow from the sand accumulation areas, preventing erosion while maintaining separation efficiency
Solution Approach 2:
Baffles serve as intermediary structures between the high-velocity inlet flow and the sand accumulation zones. The first baffle acts as a flow distributor that converts high-velocity direct flow into lower-velocity distributed flow, while bottom baffles and the second baffle create protected zones where sand can accumulate without being subjected to erosive forces
2Productivity
If conventional desanders are used, then sand removal is performed, but the separation efficiency is insufficient especially in mature oil and gas fields with high sand production
Solution Approach 1:
The vessel incorporates multiple baffles that segment the flow path into distinct zones: an inlet zone for flow distribution, a separation zone for sand settling, and an outlet zone for protected discharge. This segmentation increases the effective separation path length and creates multiple opportunities for sand removal, significantly improving separation efficiency for high sand production scenarios
Solution Approach 2:
The invention transitions from conventional single-plane flow paths to a multi-dimensional flow structure using vertical and horizontal baffles. The bottom baffles extend upward from the vessel bottom, creating vertical separation zones, while the inlet and outlet baffles create horizontal flow distribution. This multi-dimensional approach maximizes the use of vessel volume for separation, improving efficiency without increasing vessel footprint
3Productivity
If high-velocity flow is maintained for efficient sand removal, then separation performance improves, but equipment erosion and damage increase
Solution Approach 1:
The flow path is segmented into high-velocity and low-velocity zones using strategically positioned baffles. The inlet baffle initially handles the high-velocity flow to maintain separation performance, while subsequent baffles create protected low-velocity zones for sand accumulation, allowing high removal rates without exposing accumulation zones to erosive forces
Solution Approach 2:
Baffles serve as intermediary structures that mediate between the high-velocity inlet flow and the sand accumulation zones. The first baffle dissipates high-velocity flow energy, while bottom baffles and the second baffle create protected zones where sand can accumulate at lower velocities, maintaining removal efficiency while preventing erosion
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 horizontal desander design significantly enhances sand separation efficiency, reducing equipment damage and extending the time between cleanouts by redirecting fluid streams and utilizing baffles to trap particulates, thereby improving operational reliability and efficiency.
Implementation Method 1
an inlet baffle disposed within the chamber and aligned with the inflow pathway to disrupt flow of the fluid stream entering the separation chamber
Implementation Method 2
one or more separation baffles depending from a bottom surface of the chamber between the inlet and the outlet to facilitate collection of particulate matter from the fluid stream along the bottom surface of the chamber
Data Source
AI summary
A vessel for use in settling particulate matter from a fluid stream is provided. Fluid is introduced to the vessel through an angled inlet, with flow into the vessel both disrupted and deflected by an inlet baffle, to redirect the fluid stream parallel to a horizontal axis of the vessel. The velocity of the fluid stream is reduced within the vessel, allowing the particulate matter to settle along the bottom of the vessel.