Restriction tolerant packer cup

Details Restriction tolerant packer cup Restriction tolerant packer cup

2008-04-15

2008-04-15

Gay, Jennifer H (Department: 3676)

Wells

Packers or plugs

Cup type

C166S387000

Reexamination Certificate

active

07357177

ABSTRACT:
The present invention relates to a packer cup5having a deformable leading edge20which moves away from well bore or casing obstructions as the packer cup5is moved into a well bore. The anaxisymmetric deformable leading edge20can be formed by an angled leading edge19which presents only a portion of the leading edge18to a well bore obstruction and allows the edge19to move past the obstruction with little or no longitudinal force. Another embodiment provides an anaxisymmetric deformable leading interior edge72which is unduloid providing alternatively stiff and deformable sections74, 76of the edge72to move past the obstructions.

REFERENCES:
patent: 1202319 (1916-10-01), Robinson
patent: 2305282 (1942-12-01), Taylor, Jr. et al.
patent: 2950761 (1960-08-01), Brown et al.
patent: 3012608 (1961-12-01), McLaren, Jr.
patent: 3166126 (1965-01-01), Wents et al.
patent: 3703904 (1972-11-01), McClinton
patent: 4050517 (1977-09-01), Matthews
patent: 4081185 (1978-03-01), Lane
patent: 4317407 (1982-03-01), Blackwell
patent: 5095980 (1992-03-01), Watson
patent: 5295279 (1994-03-01), Cooper
patent: 6481502 (2002-11-01), Heinke et al.

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