Wellbore Gas-Liquid Separator Assembly Design
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Solution Overview
Problem
Existing gas separators in wellbores face issues with incomplete pump fillage due to gas interference, leading to costly system failures, as gas is pulled into the pump's dead space and not fully separated during the intake process, resulting in inefficient fluid ingestion and pump performance.
Innovation Solution
A separator assembly featuring a first helical ramp and a second helical ramp within a housing, creating separate flow paths to centrifugally separate gas and liquid, with the gas path allowing upward escape through bypass channels, preventing gas re-ingestion and ensuring efficient liquid pumping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional gas separator is used in a wellbore, then gas separation occurs, but gas is not fully separated from liquid and is pulled into the pump dead space, causing incomplete pump fillage and system failures
Solution Approach 1:
The separator assembly is divided into multiple functional sections: a first separator with a spiral ramp for initial gas-liquid separation, and a second separator with multiple stages for further separation. This segmentation allows progressive removal of gas from the fluid stream, preventing gas from reaching the pump dead space and ensuring complete pump fillage.
2Productivity
If gas is allowed to escape through bypass channels, then gas separation efficiency improves, but the device complexity increases due to multiple separators and flow paths
Solution Approach 1:
The first separator and second separator are combined into a single integrated assembly with multiple stages. The bypass channels are integrated within the separator structure, allowing gas to escape through defined paths while maintaining a compact design. This merging reduces the overall complexity compared to using separate, standalone separator units.
3Reliability
If multiple stages with barriers are used to separate gas and liquid, then gas separation completeness improves, but the manufacturing complexity and cost increase
Solution Approach 1:
The barriers between stages serve multiple functions: they physically separate gas and liquid phases, provide structural support for the separator assembly, and define the flow paths for both gas and liquid. This multi-functionality reduces the number of additional components needed, simplifying manufacturing compared to using separate, specialized components for each function.
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 effectively separates gas from liquid, preventing gas interference in the pump and ensuring complete pump fillage, thereby enhancing the reliability and efficiency of the pumping process by allowing gas to escape unimpeded, reducing the risk of system failures.
Implementation Method 1
A separator assembly featuring a first helical ramp and a second helical ramp within a housing, creating separate flow paths to centrifugally separate gas and liquid
Data Source
AI summary
A separator assembly having multiple separation devices for use in a wellbore. The first separator device is a spiral separator, which ingests gas and liquid from the wellbore and separates them using centrifugal force caused by the stroke of a pump. Liquid is ingested at a pump inlet and gas is vented back to the annulus. The second separator device, just uphold from the first separator device, is a multi-stage separator. This separator decreases the velocity through and past the separator, allowing liquid to fall out in each isolated stage, where it is ingested to a central tube at a port.