Screen Filter Assembly for Oil Well Pump Barrel
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Solution Overview
Problem
Oil well pumping systems face issues with solid impurities such as sand and debris, which can cause damage to pump components, reduce effectiveness, and require costly replacements due to the inability of conventional systems to effectively filter out these impurities during the pumping process.
Innovation Solution
A screen filter assembly comprising upper and lower screen housings with cylindrical bodies, screens, and apertures, designed to filter solids from pumped fluids by utilizing a combination of apertures and grooves that direct fluid and solids away from the pump barrel, preventing accumulation and damage, and a method involving the use of these housings during downstrokes and upstrokes to separate clean fluid from contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pumping systems are used without screen filters, then the system structure remains simple, but solid impurities accumulate and cause damage to pump components
Solution Approach 1:
The screen filter assembly is installed in the pump barrel to preliminarily filter solid impurities from the fluid before the fluid reaches critical pump components. This preliminary filtration action prevents sand and debris from causing damage to moving parts, thereby improving reliability without requiring complex external filtration systems
Solution Approach 2:
The screen filter assembly is nested within the existing pump barrel structure. The cylindrical screen housing fits inside the pump barrel, with the screen positioned to filter fluid while allowing the plunger and other pump components to operate around it. This nesting approach adds filtration capability without significantly increasing overall system complexity
2Object-affected harmful factors
If screen filter assembly is installed to filter solids, then component wear is reduced, but the device complexity increases
Solution Approach 1:
The screen filter utilizes a cylindrical screen made of mesh or perforated material that acts as a flexible filtering surface. This thin film structure effectively captures solid impurities while occupying minimal space within the pump barrel, reducing the harmful effects of sand and debris without adding substantial structural complexity
Solution Approach 2:
The screen filter assembly extracts and removes solid impurities from the fluid stream through filtration. By taking out the harmful solid particles and directing them away from critical components through the aperture system, the assembly protects pump parts while maintaining a relatively simple overall structure
3Productivity
If apertures and grooves are added to direct fluid away from pump barrel, then solid accumulation is prevented, but manufacturing complexity increases
Solution Approach 1:
The screen housing employs a cylindrical (curved) geometry rather than flat surfaces. This curvature facilitates the natural flow of fluid and solids away from the pump barrel along the curved surface, preventing accumulation. The cylindrical shape is also easier to manufacture using standard piping and fabrication methods compared to complex angular structures
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 prevents solids from reaching the pump barrel, reducing wear and tear on components, enhancing operational efficiency, and minimizing the need for costly replacements by ensuring clean fluid is maintained within the system, thus prolonging equipment life and reducing maintenance costs.
Implementation Method 1
a screen housed within the body of the upper screen housing; a plurality of apertures extending through the body of the upper screen housing into the center channel of the upper screen housing
Data Source
AI summary
A 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 circular grooves that trap solids therein, thereby helping to prevent the solids from falling downward toward the plunger. In an embodiment, the lower screen housing may include 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. In another embodiment, a screen filter assembly is incorporated into a full-length plunger, which contains a screen to filter solids from dirty production fluid. By filtering dirty production fluid, the screen filter assembly keeps the solids off of the plunger and away from the pump barrel.