Threaded Fluid End Section for High-Pressure Pump Wear Control
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Solution Overview
Problem
Existing high-pressure pumps face challenges in assembly, disassembly, and maintenance due to the 'in-line' nature of their fluid ends, leading to wear and potential failure at critical connection points between the static and dynamic sections, particularly under high-pressure conditions.
Innovation Solution
The design incorporates a threaded dynamic section with external threads for attachment to the static section, utilizing hardened inserts and retaining mechanisms to reduce stress and wear, along with symmetrical fluid paths and dual guide valves to minimize misalignment and wear, and employs wear rings to distribute load and protect critical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the fluid end is designed as an in-line structure with critical connection points between static and dynamic sections, then the pump can achieve high-pressure operation, but wear and potential failure occur at the connection points
Solution Approach 1:
The fluid end is divided into separate static and dynamic sections that are threaded together, allowing the dynamic section to be removed and replaced independently. This segmentation eliminates wear at the threaded connection points between sections, as the threads are not subjected to high-pressure differential forces during operation.
Solution Approach 2:
The dynamic section is extracted as a separate removable component from the fluid end assembly. This allows the dynamic section to be easily removed for replacement or maintenance without disassembling the entire pump, and prevents wear accumulation at the connection interface between static and dynamic sections.
2Strength
If the dynamic section is made as a single integrated piece with the static section, then structural strength is maintained, but assembly and maintenance become difficult
Solution Approach 1:
The fluid end is segmented into static and dynamic sections connected by threaded joints, allowing the dynamic section to be independently removed for maintenance or replacement while maintaining structural integrity during operation.
Solution Approach 2:
The threaded connection between static and dynamic sections is pre-designed with appropriate thread geometry and engagement length to ensure structural strength is maintained while enabling easy assembly and disassembly for maintenance purposes.
3Ease of manufacture
If traditional fluid end designs are used without threaded dynamic sections, then manufacturing is simpler, but accessibility for part replacement is poor
Solution Approach 1:
The dynamic section is segmented as a separate threaded component that can be independently removed from the static section, providing excellent accessibility for part replacement while maintaining manufacturing simplicity through standard threaded fastening methods.
Solution Approach 2:
The threaded connection design serves multiple functions: it provides structural strength to maintain high-pressure operation, enables easy assembly and disassembly for maintenance, and allows the dynamic section to be replaced without specialized tools or procedures.
Data Source
AI summary
A high-pressure hydraulic fracturing pump. The pump is in-line in orientation, with a static section having a high-pressure discharge chamber and a dynamic section having a dynamic internal bore threaded to the static section. A fluid routing plug is disposed within a bore which includes the dynamic internal bore. The pump is designed for ease of access and for reducing wear. Large, external threads on the dynamic section pair with internal threads on the static section to reduce wear associated with repeated pressurization of hydraulic fracturing fluid found within the pump. Seals and wear rings are found at a nose of the dynamic section to further prevent wear and damage.