Sectional Fluid End Assembly for High-Pressure Pump Reliability
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Solution Overview
Problem
Conventional fluid ends used in hydraulic fracturing operations experience frequent failures due to high operational pressures, vibrations, and abrasives, leading to premature wear and leakage, and requiring frequent replacements.
Innovation Solution
A high pressure pump design featuring a fluid end assembly with multiple sections that can be easily replaced, secured by stay rods and fasteners, and equipped with components like hardened inserts and wear rings to mitigate erosion and extend service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If conventional fluid ends operate under high pressures (5,000-15,000 psi or greater), then they can deliver the required fluid volume and pressure for hydraulic fracturing operations, but they experience frequent structural failures, wear, and leakage
Solution Approach 1:
The fluid end is divided into multiple replaceable sections (first section, second section, third section) that can be independently removed and replaced. This segmentation allows damaged sections to be replaced without replacing the entire fluid end, reducing downtime and costs while maintaining reliability under high pressure
Solution Approach 2:
Hardened inserts and wear rings are applied specifically to areas subject to high wear and erosion (such as plunger rods, valve seats, and sealing surfaces). This local reinforcement protects critical components from abrasive damage while maintaining the overall structure's integrity under high pressure
2Strength
If fluid ends are designed as integrated units, then they provide structural integrity, but replacement of damaged components requires replacing the entire assembly, increasing downtime and costs
Solution Approach 1:
The fluid end is constructed as an assembly of multiple sections (first section with front retainer, second section with rear retainer, third section) that are joined together but can be independently removed. This allows damaged components in one section to be replaced without affecting other sections, maintaining structural integrity while enabling modular repair
Solution Approach 2:
The design allows damaged sections or components (such as wear rings, hardened inserts, or entire sections) to be discarded and replaced with new or reconditioned parts. The stay rods and fasteners can be recovered and reused, reducing replacement costs while maintaining structural integrity
3Productivity
If fluid ends operate for extended periods under high pressure with abrasives, then productivity is maintained, but premature wear occurs requiring frequent replacements
Solution Approach 1:
Hardened inserts and wear rings are installed in advance on components that will be subject to abrasive wear from proppants and high-velocity fluid. This preliminary protection extends the service life of critical components, allowing continuous operation without premature failure
Solution Approach 2:
The use of hardened materials (changing the material parameter) for inserts and wear rings significantly increases resistance to abrasive wear from proppants. This parameter change extends the duration of action and service life of components operating under high pressure with abrasives
Data Source
AI summary
A high pressure pump. The pump comprises a fluid end assembly supported on a power end assembly. The power end assembly is modular and held together by a first set of stay rods. The fluid end assembly comprises a plurality of fluid end sections positioned in a side-by-side relationship. Each fluid end section comprises a housing made of multiple-piece construction. One or more pieces of the housing are configured to having a second set of stay rods attached thereto. The second set of stay rods interconnect the fluid end assembly and a power end assembly and a vertically offset from the first set of stay rods.