Self-Orientating Gas Separator for ESP Gas Lock Prevention
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Solution Overview
Problem
Conventional ESP systems face efficiency and capacity issues when dealing with gas-laden fluids due to gas accumulation, leading to 'gas lock' conditions, especially in wellbores with complex angular configurations, where gas separates from liquid and impairs centrifugal pump performance.
Innovation Solution
A gas separator with a combination of a reverse flow separator chamber and a self-orienting inner chamber intake, utilizing Earth's gravity to separate low-density gas from high-density liquid, with vertically and horizontally offset intake ports and a rotatable self-orienting intake mechanism, ensures effective separation regardless of wellbore configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional gas separator is used in ESP systems, then gas separation function is provided, but gas lock conditions occur in complex angular wellbore configurations reducing pump efficiency
Solution Approach 1:
The gas separator incorporates a rotatable inner chamber that can dynamically reorient itself based on the wellbore's angular configuration. This dynamic adaptation allows the separator to maintain effective gas-liquid separation regardless of the wellbore's orientation, preventing gas lock conditions and maintaining pump efficiency in complex well geometries.
Solution Approach 2:
The system changes the orientation parameter of the separator's intake chamber through rotation, allowing it to adapt to different wellbore angles. This parameter change enables the separator to optimize its separation performance for various gravitational vectors encountered in angular wellbores.
2Adaptability or versatility
If ESP strings are used to access reservoirs from different angles, then well site accessibility is improved, but gas accumulation in higher elevations causes gas lock conditions
Solution Approach 1:
The rotatable inner chamber provides dynamic adaptability to different wellbore configurations. As the wellbore angle changes, the inner chamber rotates to maintain the correct orientation for effective gas separation, ensuring reliable performance across various angular configurations that enhance well site accessibility.
Solution Approach 2:
The gas separator is designed to universally handle multiple wellbore configurations (vertical, angular, undulating) through its rotatable mechanism. This multi-functionality allows a single device to effectively separate gas from liquid regardless of the specific wellbore geometry, supporting diverse reservoir access strategies.
3Device complexity
If gas separator orientation is fixed, then device complexity is reduced, but separation effectiveness varies with wellbore configuration
Solution Approach 1:
The addition of a rotatable inner chamber introduces controlled complexity to the separator structure. This dynamic element allows the separator to automatically adapt its orientation to match the wellbore configuration, maintaining consistent separation effectiveness without requiring multiple fixed-orientation separators for different applications.
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 in various wellbore configurations, preventing gas lock and optimizing ESP system performance by ensuring continuous fluid flow and maintaining pump efficiency even in complex wellbore geometries.
Implementation Method 1
utilizing Earth's gravity to separate low-density gas from high-density liquid
Data Source
AI summary
A gas separator operationally coupled between a submersible pump and a motor for use in downhole reservoirs includes an intake housing and an inner intake assembly. The intake housing includes at least two sets of intake ports along an upper section adjacent to the pump with ports in a set vertically offset and sets horizontally offset. The inner intake assembly includes a separation chamber, a self-orienting intake rotatable around a central axis and having at least one communication port, and a port controller. The port controller functions to position the communications port toward the bottom of the gas separator when the gas separator is positioned horizontally in a downhole wellbore. The intake housing allows reservoir fluid traveling downstream to pass through intake ports and into the separation chamber through the communication ports.