Segmented Fluid End Assembly for High-Pressure Pump Durability
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Solution Overview
Problem
Conventional fluid ends used in hydraulic fracturing operations experience frequent failures due to high operational pressures, corrosion, and erosion from proppants, leading to structural issues such as cracking and leakage, resulting in short operational lifespans and frequent replacements.
Innovation Solution
A modular fluid end assembly with a single housing and multiple sections, each with a single horizontal bore, reduces stress points and manufacturing costs, allowing for easier maintenance and replacement of individual sections, and incorporates a dual manifold system for fluid delivery to minimize wear and maximize fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluid ends are used in hydraulic fracturing operations, then they can deliver high volumes of highly pressurized fluid, but they experience frequent failures due to high operational pressures, corrosion, and erosion from proppants
Solution Approach 1:
The fluid end is divided into multiple modular sections (first section, second section, third section) that can be independently replaced. This segmentation allows only the worn or damaged section to be replaced rather than the entire fluid end, extending operational lifespan while maintaining reliability under high pressures and corrosive conditions.
2Ease of repair
If conventional single-piece housing design is used, then manufacturing is simpler, but maintenance and replacement require replacing the entire assembly even when only one section is worn
Solution Approach 1:
The housing is segmented into multiple removable sections connected by coupling mechanisms. This allows individual sections to be detached and replaced independently, significantly improving ease of repair and reducing maintenance costs despite the increased structural complexity of the modular design.
3Power
If high pressure operation is maintained, then hydraulic fracturing effectiveness is improved, but stress concentrations and wear on components increase
Solution Approach 1:
The segmented modular design distributes stress concentrations to specific localized areas within individual sections rather than across the entire housing. This allows high pressure operation to be maintained while protecting overall component durability, as each section can be designed with optimized stress distribution and replaced when locally worn.
Solution Approach 2:
Different sections of the fluid end can be made from materials or with features optimized for their specific functional requirements and stress conditions. This local quality optimization enhances strength and durability in high-stress areas while maintaining overall pressurization capability.
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 modular design significantly extends the operational lifespan of fluid ends by reducing stress concentrations, corrosion, and wear, while improving fluid flow and maintenance efficiency, thereby reducing maintenance intervals and operational costs.
Implementation Method 1
A plunger is reciprocatingly disposed within the housing... the plunger reciprocates to pressurize fluid
Implementation Method 2
A seal is interposed between the plunger and the housing... the seal prevents fluid from passing around the plunger
Implementation Method 3
A bearing supports the plunger... Each bearing has a lubricant supply passage formed therein
Data Source
AI summary
A high pressure pump comprising a fluid end mechanically coupled to a power end. The power end is modular and comprises a crankshaft section, a crosshead section, and a connector section coupled together by a first set of stay rods. The fluid end comprises a plurality of fluid end sections positioned in a side-by-side relationship. Each of the plurality of fluid end sections are attached to the power end using a plurality of second set of stay rods.