Downhole Blower Seal Actuation for Well Production
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Solution Overview
Problem
Well production declines as reservoir pressures decrease, making it difficult to extract fluids to the surface, especially in gas wells where natural pressure is insufficient to drive production without external assistance.
Innovation Solution
A downhole blower system with an electromagnetic actuator and seal is deployed in the wellbore to create a pressure differential by sealing the blower with the wellbore, using power transmitted through an electrical cable or generated from production fluids to enhance gas flow to the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a top side compressor is used to decrease pressure at the top of the well, then well production can be extended, but the system complexity and energy consumption increase
Solution Approach 1:
Instead of placing the compressor at the surface (top side), the invention inverts the approach by deploying a blower system downhole within the wellbore. This eliminates the need for complex surface compression equipment and long tubing strings, while achieving the same pressure differential effect to extend well life.
Solution Approach 2:
The invention extracts the compression function from the surface equipment and relocates it downhole. By removing the need for surface compressors and associated complex infrastructure, the system simplifies the overall architecture while maintaining the ability to extend well production life.
2Productivity
If a downhole blower system is deployed, then pressure differential and gas flow are enhanced, but the need for reliable sealing and power transmission increases system complexity
Solution Approach 1:
The electromagnetic actuator serves multiple functions: it acts as both the sealing mechanism (by expanding the seal against the wellbore wall) and the power transmission device (converting electrical energy to mechanical expansion force). This multi-functionality reduces the number of separate components needed for sealing and power delivery.
Solution Approach 2:
The invention merges the seal and electromagnetic actuator into a single integrated assembly. The actuator is positioned within the seal structure, combining the sealing element and actuation mechanism into one unified component that performs both sealing and power conversion functions simultaneously.
3Ease of operation
If power is transmitted through an electrical cable from the surface, then the electromagnetic actuator can be actuated, but the risk of cable failure and power loss increases
Solution Approach 1:
The system is designed to generate its own power downhole using a generator driven by production fluids flowing through the wellbore. This self-service approach eliminates dependence on surface power transmission, allowing the electromagnetic actuator to be powered locally by the well's own production flow, thereby improving reliability.
4Stress or pressure
If the seal is deployed to seal the blower with the wellbore, then pressure differential is achieved, but the risk of seal failure and production loss increases
Solution Approach 1:
The seal is designed to be dynamically adjustable through the electromagnetic actuator, which can expand or contract the seal position radially. This dynamic capability allows the seal to adapt to varying wellbore conditions and maintain optimal sealing pressure, improving reliability compared to static seal designs.
Solution Approach 2:
The electromagnetic actuator provides active control of the seal position based on feedback from sensors that monitor wellbore conditions. This feedback mechanism allows the system to automatically adjust seal expansion to maintain optimal sealing pressure, preventing both over-expansion (which could cause failure) and under-expansion (which would leak).
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 system effectively boosts well production by increasing pressure and flow rate, extending the life of the well by maintaining or enhancing fluid extraction even when natural reservoir pressure is insufficient.
Implementation Method 1
Power is received at an electromagnetic actuator positioned downhole in a wellbore. The electromagnetic actuator is actuated using the received power.
Implementation Method 2
The seal is deployed to seal the outer surface of the downhole blower with the inner surface of the wellbore
Data Source
AI summary
This disclosure describes various implementations of a downhole-blower system that can be used to boost production in a wellbore. The downhole-blower system includes a blower and an electric machine coupled to the blower that can be deployed in a wellbore, and that can, in cooperation, increase production through the wellbore.