Radial-flow filter and method of manufacture

Details Radial-flow filter and method of manufacture Radial-flow filter and method of manufacture

1997-09-25

1998-11-10

Walker, W. L.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

55520, 55525, 55526, 55DIG5, 298966, 2989661, 2989662, 29902, B01D 2921

Patent

active

058338535

ABSTRACT:
A method of manufacture of a radial-flow filter particularly suitable for use as an input filter in a subterranean fluid (oil, gas, water) well starts with a length L of multi-perforate pipe, which may be an integral part of the production tubing of the well. The pipe is mounted in an engine lathe with the perforated length L between the headstock and the tailstock of the lathe. With the pipe rotating, a strip of metal wool, preferably stainless steel wool, is wrapped around the pipe in repeated, overlapping helical layers each aligned at an acute angle X to the pipe axis, with adjacent layers angularly displaced by an angle 2X. The completed filter may have a tubular wire mesh around the pipe, between the pipe and the innermost layer of steel wool, and a multi-perforate sheath over the outermost layer of wool.

REFERENCES:
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patent: 4225442 (1980-09-01), Sundberg et al.
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patent: 4434054 (1984-02-01), Livesey et al.
patent: 4473472 (1984-09-01), Muller
patent: 5039413 (1991-08-01), Harwood et al.
patent: 5230726 (1993-07-01), Smith et al.
patent: 5290446 (1994-03-01), Degen et al.
patent: 5508370 (1996-04-01), Kraft et al.

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