Overview
Filed August 06, 2011 and granted June 24, 2014, this patent protects a downhole filter concept that reduces air entrainment and protects pumps by converting high-energy cascading flow into a low-energy trickle before it reaches the pump intake. Developed by inventors based in Texhoma, OK, the disclosure describes a bristle-based element installed in the annular space between a well column and casing, positioned above the drawdown level so that falling liquid is forced through only non-linear, tortuous passages formed by densely packed bristles. The design’s outside diameter is sized to engage the casing interior, allowing the bristles to scrape debris during installation and to substantially fill the annulus to ensure flow is directed through multiple non-linear paths. The specification also covers practical installation approaches — sliding the assembly over a column section, replacing a column section, or welding for secure attachment — and contemplates common pump types including centrifugal and submersible units. The claims and specification were drafted to capture the structure, installation methods, and functional flow behavior to deliver robust IP protection for a pragmatic filtration solution.
Key Features
- Bristle element creating only non-linear fluid passages
- Installed between column and casing above drawdown level
- Outside diameter sized to engage casing internal diameter
- Compatible with centrifugal and submersible pumps
- Simple installation: slide-on, section replacement, or weld
This invention reduces air bubble ingestion and associated pump wear, offering immediate operational benefits for water and hydrocarbon well systems while addressing broader reliability concerns in downhole fluid handling.
