Method and apparatus for gravel packing well bores

Details Method and apparatus for gravel packing well bores Method and apparatus for gravel packing well bores

1975-03-07

1976-06-15

Novosad, Stephen J.

Wells

Processes

Graveling or filter forming

166 51, 166226, E21B 4304, E21B 4310

Patent

active

039630765

ABSTRACT:
A liner provided with by-pass ports and a perforated portion or screen below the ports is secured to a suitable well packer and lowered on an outer tubing string in well casing to a location at which the screen straddles casing perforations within a producing formation, the packer being packed-off against the casing above its perforations and anchored against movement in both directions to secure the liner and its screen in place. An inner tubing string is lowered through the outer string into the liner, the inner string and liner having upper and lower seal devices, either of which is selectively engaged while the other is disengaged, or both of which are disengaged, by longitudinal movement of the inner string in the outer string and liner, to control the flow of circulating, washing, or acidizing fluids in both directions between the inner string, liner-casing annulus, and inner string-outer string annulus, and also the placement of gravel in the liner-casing annulus.

REFERENCES:
patent: 3329205 (1967-07-01), Brown
patent: 3421586 (1969-01-01), Solum
patent: 3627046 (1971-12-01), Miller et al.
patent: 3710862 (1973-01-01), Young et al.
patent: 3726343 (1973-04-01), Davis, Jr.
patent: 3818986 (1974-06-01), Abney et al.
patent: 3830294 (1974-08-01), Swanson, Jr.
patent: 3850246 (1974-11-01), Despujols

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