Pressure Exchanger Pistons for Abrasive Fluid Isolation
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Solution Overview
Problem
Industrial processes involving hydraulic systems face increased maintenance and wear due to the use of abrasive, caustic, or acidic fluids, leading to higher costs and downtime, particularly in high-pressure applications like hydraulic fracturing.
Innovation Solution
A pressure exchanger system with pistons and valves that separates clean and dirty fluids, allowing pressure transfer without direct fluid contact, protecting moving components and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If high-pressure pumps are used to increase fluid pressure in hydraulic fracturing operations, then the required pressure is achieved, but wear and maintenance on pump components increases substantially due to abrasive proppant in the fluid
Solution Approach 1:
A piston serves as an intermediary component that transfers pressure from clean hydraulic fluid to proppant-laden fracking fluid without direct contact between the clean fluid and abrasive proppant. The piston isolates the two fluid streams while enabling pressure transmission, protecting the pump system from wear caused by abrasive particles.
Solution Approach 2:
The system divides the fluid handling into separate zones: a clean fluid side and a dirty proppant-laden side, separated by the piston. This segmentation prevents mixing of clean hydraulic fluid with abrasive proppant while allowing pressure transfer between the two sides, reducing wear on pump components.
2Power
If proppant-laden fluid is pumped at high pressure, then hydraulic fracturing effectiveness is improved, but wear on pump components increases and operation lifespan is reduced
Solution Approach 1:
The piston acts as a mediator that allows high-pressure proppant-laden fluid to be generated without exposing pump components directly to abrasive wear. The piston transfers pressure from a clean fluid side to the proppant-laden side, enabling high-power fracturing operations while protecting components from harmful abrasive contact.
Solution Approach 2:
The harmful proppant particles are extracted from the pump system by using a separate clean fluid to generate pressure. The piston isolates the proppant-laden fluid from the pump components, removing the abrasive elements from direct contact with moving parts while maintaining the necessary hydraulic power.
3Use of energy by moving object
If clean fluid is used to pressurize proppant-laden fluid through direct contact, then pressure transfer is efficient, but contamination of clean fluid occurs
Solution Approach 1:
The piston serves as an intermediary barrier that enables efficient pressure transfer from clean fluid to proppant-laden fluid while preventing contamination. The piston allows mechanical pressure transmission without fluid mixing, maintaining clean fluid purity while achieving effective pressure transfer for fracturing operations.
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 transfers pressure between fluids, minimizing contamination and wear on equipment, reducing maintenance costs and downtime while maintaining operational efficiency.
Implementation Method 1
The piston may be configured to separate the clean fluid from the downhole fluid to at least partially prohibit fluid the downhole fluid from traveling from the dirty side to the clean side
Implementation Method 2
The valve device may be configured to selectively place the clean fluid at the higher pressure in communication with the downhole fluid at the lower pressure through the piston to pressurize the downhole fluid to a second higher pressure
Data Source
AI summary
Pistons and related methods may be configured to separate fluids and to at least partially prohibit one fluid from traveling to one side of the piston from another side of the piston. Pressure exchange devices and systems may include such pistons.