Apparatus and methods of preventing screen collapse in gravel pa

Details Apparatus and methods of preventing screen collapse in gravel pa Apparatus and methods of preventing screen collapse in gravel pa

1996-01-11

1997-10-14

Tsay, Frank

Wells

Processes

Graveling or filter forming

166 51, 166158, 166319, 1663321, E21B 33124

Patent

active

056762089

ABSTRACT:
A gravel packing apparatus and associated method of gravel packing a subterranean well prevents screen collapse without requiring sealing engagement of a washpipe with an external seal, without requiring reliance solely on differential pressure, and without utilizing a reciprocating valve. In a preferred embodiment, a gravel packing apparatus has a tubular mandrel, a tubular housing attached to the mandrel and defining an annular space between the mandrel and housing, a sleeve slidably disposed on the mandrel and extending into the annular space, first and second seals disposed on the sleeve, and a screen slidably disposed on the mandrel and attached to the sleeve for sliding displacement therewith.

REFERENCES:
patent: 3710862 (1973-01-01), Young et al.
patent: 4018284 (1977-04-01), Perkins
patent: 4049055 (1977-09-01), Brown
patent: 4846281 (1989-07-01), Clary et al.
patent: 4858691 (1989-08-01), Ilfrey et al.
patent: 4915172 (1990-04-01), Donovan et al.
patent: 5332038 (1994-07-01), Tapp et al.
patent: 5332045 (1994-07-01), Ross et al.

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