Multi-layer well screen

Details Multi-layer well screen Multi-layer well screen

1976-12-22

1984-06-19

Pate, III, William F.

Wells

Screens

Spiral

166233, E21B 4308

Patent

active

RE0316040

ABSTRACT:
This is a special downhole multi-layer sand screen for oil and other fluids containing sand. The preferred embodiment of the sand filter includes an outer screen, an intermediate screen and an inner screen although another embodiment may have only an outer and an inner screen. The outermost screen is of larger spacing to retain only the coarser sand particles and the openings in the inner two screens are progressively smaller to retain the less coarse sand material. The coarser sand particles bridge about the larger openings in the outer screens and progressively finer sand materials bridge across the intermediate and inner screens.

REFERENCES:
patent: 65276 (1867-05-01), Ricker
patent: 85428 (1868-12-01), Burditt
patent: 713544 (1902-11-01), Ware
patent: 1406825 (1922-02-01), Dobson
patent: 2729294 (1956-01-01), Adams
patent: 2877852 (1959-03-01), Bashara
patent: 3385373 (1968-05-01), Brown
patent: 3389797 (1968-06-01), Giardini

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