Abrasion Resistant Gas Separator with Channeled Compression Tube
Solution Overview
Problem
Downhole pumping systems face issues with gas separation, particularly in sandy wells where abrasive solid particles cause significant abrasion and reduce the service life of gas separator components, despite the use of hardened materials.
Innovation Solution
A gas separator design featuring a rotatable shaft with multiple separation stages, including a rotor, channeled compression tube with channels to trap abrasive particles, and a streamer to reduce rotational currents, effectively isolating solids and improving separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardened materials are used to reduce abrasion, then the service life of components is extended, but in extremely sandy wells even hard-coated parts may not adequately extend service life
Solution Approach 1:
The patent extracts and removes abrasive solid particles from the fluid stream before they can reach and damage the rotor and other rotating components. The channeled compression tube acts as a barrier that traps particles in its channels, preventing them from entering the rotor assembly and causing abrasion.
Solution Approach 2:
The channeled compression tube serves as an intermediary barrier between the abrasive particles and the rotor. It intercepts particles in the fluid and redirects them into its internal channels, where they are contained and prevented from contacting the sensitive rotating components.
2Reliability
If a channeled compression tube is used to isolate abrasive particles, then resistance to abrasion is enhanced, but device complexity increases
Solution Approach 1:
The compression tube is given multiple functions: it performs the standard compression function and simultaneously acts as a particle trap and protective barrier. By integrating these functions into a single component, the patent avoids adding separate protective devices that would increase complexity.
Solution Approach 2:
The channeled compression tube uses a thin-walled structure with integrated channels that provides both mechanical function and particle containment. This approach avoids the need for heavy, complex protective housings while still effectively isolating particles from rotating components.
3Productivity
If multiple separation stages are used to improve separation efficiency, then gas separation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple separation stages into a single integrated rotor assembly, where multiple blades work together in one rotating unit. This merging approach achieves multi-stage separation functionality without the complexity of multiple separate stages, reducing overall device complexity while maintaining high separation efficiency.
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 design significantly enhances the resistance to abrasive particles, extending the service life of components and improving the efficiency of gas separation, even in extremely sandy wells.
Implementation Method 1
The agitator is typically configured as a rotary paddle that imparts centrifugal force to the wellbore fluid. As the wellbore fluid passes through the agitator, heavier components, such as oil and water, are carried to the outer edge of the agitator blade, while lighter components, such as gas, remain close to the center of the agitator.
Data Source
AI summary
A gas separator is configured to separate gas from a two-phase fluid. The gas separator includes a rotatable shaft and one or more separation stages. At least one of the one or more separation stages includes a rotor connected to the rotatable shaft and a channeled compression tube, wherein the channeled compression tube includes a compression tube hub and a plurality of channels. The channels are configured to isolate abrasive solid particles from the rotary components within the gas separator. The gas separator may optionally include a streamer upstream from the separation stage that reduces rotational currents upstream from the rotor.