Isobaric Pressure Exchanger Barrier for Proppant Wear Isolation
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Solution Overview
Problem
Hydraulic fracturing operations face equipment wear and maintenance challenges due to the abrasive nature of proppant-laden fluids, which increases the wear and maintenance of high-pressure pumps used in well completion operations.
Innovation Solution
A hydraulic energy transfer system that transfers work and pressure between proppant-free and proppant-laden fluids, using devices like hydraulic turbochargers and isobaric pressure exchangers to isolate the fluids and reduce contact, thereby protecting equipment and maintaining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If proppant-laden fluids are pumped through high-pressure pumps to achieve hydraulic fracturing, then the fracturing operation can be performed effectively, but the abrasive proppant increases wear and maintenance on the pumps
Solution Approach 1:
The system divides the fluid handling into two separate streams: a proppant-free hydraulic fluid that passes through the high-pressure pump, and a proppant-laden frac fluid that is pressurized separately. This segmentation prevents the abrasive proppant from contacting the pump components, thereby reducing wear and extending pump lifespan while maintaining effective fracturing capability.
Solution Approach 2:
A proppant-free hydraulic fluid acts as an intermediary medium that transfers pressure to the proppant-laden frac fluid through a pressure transfer device (such as a hydraulic turbocharger or isobaric pressure exchanger). The hydraulic fluid absorbs the mechanical stress from the pump and transfers it to the frac fluid without direct contact between the proppant and pump components, eliminating abrasive wear.
2Reliability
If proppant-free hydraulic fluid is used in the high-pressure pump, then pump wear is reduced, but the system complexity increases due to fluid mixing concerns
Solution Approach 1:
The proppant component is extracted from the hydraulic fluid stream before it enters the high-pressure pump. The frac fluid is prepared separately with proppant added, then pressurized through the hydraulic energy transfer system. This extraction ensures that only clean hydraulic fluid contacts the pump, maintaining reliability while the separate preparation stream manages the complexity of fluid isolation.
Solution Approach 2:
The system uses hydraulic energy transfer devices (hydraulic turbochargers or isobaric pressure exchangers) that utilize hydraulic principles to transfer pressure from the proppant-free fluid to the proppant-laden fluid. These devices employ hydraulic seals and pressure equalization mechanisms that inherently prevent fluid mixing, managing system complexity through established hydraulic technology rather than mechanical barriers.
3Ease of repair
If hydraulic energy transfer devices are used to separate proppant-free and proppant-laden fluids, then equipment wear is reduced, but the device complexity and initial cost increase
Solution Approach 1:
The hydraulic energy transfer device serves multiple functions: it pressurizes the frac fluid to fracturing pressures, transfers energy from the hydraulic fluid to the frac fluid, and acts as a barrier preventing fluid mixing. By consolidating these functions into a single device, the system manages complexity while achieving reduced maintenance frequency through protected pump components.
Solution Approach 2:
The system changes the operational parameters of the hydraulic fluid (using clean, viscous hydraulic oil) versus the frac fluid (water-based with proppant), allowing each fluid to be optimized for its specific function. The hydraulic fluid is designed for pump compatibility and pressure transfer efficiency, while the frac fluid is optimized for fracturing performance, reducing maintenance needs through parameter differentiation.
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 reduces wear on high-pressure pumps, extends their lifespan, and allows the use of less expensive equipment by minimizing contact between abrasive fluids and pump components, while maintaining high-pressure fluid transfer efficiency.
Implementation Method 1
a hydraulic energy transfer system that transfers work and pressure between proppant-free and proppant-laden fluids
Implementation Method 2
isobaric pressure exchangers to isolate the fluids and reduce contact
Data Source
AI summary
A hydraulic energy transfer system including an isobaric pressure exchanger (IPX) configured to exchange pressure between a first fluid and a second fluid. The IPX includes a channel formed by the IPX. The IPX is designed to direct the first fluid to a first opening of the channel and the second fluid to a second opening of the channel. The IPX further includes a barrier disposed within the channel. The barrier is designed to reduce mixing of the first fluid and the second fluid while exchanging pressure between the first fluid and the second fluid within the channel.