US 8,082,986 B2 · Filtering device, especially for use as a well screen filter

Abstract

The present invention relates to filtering device which is especially designed for use as a well screen filter. The filtering device comprises a tubular supporting element (12) and two or more tubular segments (14) of a porous filter medium arranged in axial alignment to one another and concentrically and essentially coextensive with the tubular supporting element (12), said tubular supporting element (12) having a tubular wall provided with a plurality of perforations (26, 28, 30) and having a plurality of projections projecting from said tubular wall, said projections supporting the two or more tubular segments in axial alignment with the tubular wall, said tubular segments each having two end portions which are in sealing contact with the tubular supporting element or an end portion of another tubular segment.

Claims20

Dependent claims

A filtering device, especially for use as a well screen filter, comprising a tubular supporting element comprising plastic material and two or more tubular segments of a porous filter medium comprising plastic material arranged in axial alignment to one another and concentrically and essentially coextensive with the tubular supporting element, said tubular supporting element having a tubular wall provided with a plurality of perforations and having a plurality of projections projecting from said tubular wall, said projections supporting and bonded or welded to the two or more tubular segments in axial alignment with the tubular wall, said tubular segments each having two end portions which are in sealing contact with and are bonded or welded to the tubular supporting element or an end portion of another tubular segment.

Dependencies are inferred from the claim text.

Filtering device, especially for use as a well screen filter

Life of this patent

Filtering device, especially for use as a well screen filter

Life of this patent

Abstract

Claims20