Downhole pump filter
This paper describes a downhole pump filter. It is for use in filtering sand and other solid particles from well fluids prior to passage of the fluids through a pump intake nut of a well pump, the intake nut having internal threads on a lower portion thereof, the combination with the pump intake nut of a cylindrical coupling having external threads on an upper end thereof and on a lower end thereof. The upper external threads of the coupling being rotationally engaged with the lower internal threads on the intake nut, a tubular member having an upper end coaxially secured within the coupling lower end and having perforations dispersed at least along the lower portion thereof, a filtering means encasing the portion of the tubular member in which the perforations are dispersed for blocking sand or other particles from entry into the tubular member perforations, a cylindrical casing having a closed lower end and internal threads on an upper end thereof. The casing internal threads being rotationally secured to the coupling lower external threads with the tubular member and the filtering means disposed within the casing. The casing having perforations dispersed along the length thereof for blocking larger sand or solid particles from entry into the casing. The casing perforations, the filtering means, the tubular member perforations. The coupling and the intake nut sequentially communicating to form a flow path for the well fluid.
- Assignee:
- NOV; NOV-91-015468; EDB-91-150447
- Patent Number(s):
- US 4977958; A
- Application Number:
- PPN: US 7-541622
- OSTI ID:
- 5144068
- Resource Relation:
- Patent File Date: 21 Jun 1990
- Country of Publication:
- United States
- Language:
- English
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