Screen Filter Assembly for Oil Well Pump Solid Removal
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Solution Overview
Problem
Conventional oil well pumping systems face issues with solid impurities like sand and debris causing damage to pump components, leading to reduced effectiveness and costly maintenance due to the accumulation of solids between pump parts.
Innovation Solution
A screen filter assembly comprising upper and lower screen housings with cylindrical bodies, screens, and strategically placed apertures and rings that filter out solids during the pumping process, preventing them from reaching the pump barrel and ensuring clean fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pumping systems operate without screen filters, then the device complexity is reduced, but solid impurities cause damage to pump components reducing reliability
Solution Approach 1:
The screen filter assembly is installed in advance within the pump barrel to preemptively filter solid impurities from the pumped fluid before they can reach and damage pump components. This preliminary filtration action prevents wear and damage to the plunger, barrel, and other moving parts, thereby maintaining reliability without requiring complex post-filtration systems.
Solution Approach 2:
The screen filter assembly acts as an intermediary component between the pumped fluid and the pump components. It intercepts and removes solid impurities (sand, pebbles, debris) from the fluid stream, preventing these harmful particles from directly contacting and damaging the plunger, barrel, and valve mechanisms. This intermediary filtration layer protects the pump system while maintaining relatively simple overall device complexity.
2Reliability
If screen filter assembly is installed in the pump barrel, then solids are removed from pumped fluid improving reliability, but device complexity increases
Solution Approach 1:
The screen filter assembly is nested within the existing pump barrel structure. The upper and lower screen housings are positioned inside the pump barrel, with the filter screens contained within these housings. This nesting approach allows the filtration system to be integrated into the existing pump architecture without requiring separate external filtration equipment, thereby improving reliability while minimizing the increase in overall device complexity.
Solution Approach 2:
The screen filter assembly serves multiple functions within a single integrated structure: it filters solid impurities from the pumped fluid, supports the lower traveling valve assembly, and provides structural reinforcement within the pump barrel. By combining filtration and structural support functions in one assembly, the patent improves reliability without proportionally increasing device complexity.
3Quantity of substance
If multiple screens and housings are used to filter solids, then fluid purity is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The screen filter assembly is segmented into distinct modular components: an upper screen housing containing a first filter screen, a lower screen housing containing a second filter screen, and associated support structures. This segmentation allows each component to be manufactured and assembled separately, then integrated into the pump barrel. The modular design improves fluid purity through multi-stage filtration while maintaining ease of manufacture through standardized, replaceable components.
Solution Approach 2:
The filter screens are constructed from porous materials with specific pore sizes designed to capture solid impurities (sand, pebbles, debris) while allowing the pumped fluid to pass through. The porous structure provides effective filtration that improves fluid purity, while the screens themselves are relatively simple to manufacture using standard porous material fabrication techniques, balancing filtration effectiveness with manufacturing ease.
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 screen filter assembly effectively removes solids from the pumped fluid, reducing wear on pump components and maintaining system efficiency by ensuring clean fluid flow, thereby minimizing downtime and maintenance costs.
Implementation Method 1
A screen filter assembly comprising upper and lower screen housings with cylindrical bodies, screens, and strategically placed apertures and rings that filter out solids during the pumping process
Data Source
AI summary
A screen filter assembly is disclosed. The screen filter assembly has an upper screen housing and a lower screen housing, both of which contain screens to filter solids from dirty production fluid. The lower screen housing has a plurality of rings that seal off the area between the upper screen housing and the lower screen housing, thereby preventing any cleaned fluid produced by the lower screen housing from mixing with any contaminated fluid above it. The screen filter assembly filters dirty production fluid in order to keep the solids off of the plunger.