Slip spring with heel notch

Details Slip spring with heel notch Slip spring with heel notch

2006-08-01

2006-08-01

Bagnell, David (Department: 3672)

Wells

Packers or plugs

With expanding anchor

C166S214000, C175S423000

Reexamination Certificate

active

07082991

ABSTRACT:
In order to prevent premature separation of the slip and slip spring and to simplify production of the slip casing, a self-centering spring engageable with a packer tool slip is modified according to the present invention. A groove located at a lower center of the slip below the pocket of the slip cooperates with the spring to retain the spring against the slip and is centered within the pocket without requiring partitions or further welding of lugs to retain the springs.

REFERENCES:
patent: 2568005 (1951-09-01), Holder et al.
patent: 3270819 (1966-09-01), Thrane et al.
patent: 3291220 (1966-12-01), Mott
patent: 3456723 (1969-07-01), Current et al.
patent: 3570596 (1971-03-01), Young
patent: 4284137 (1981-08-01), Taylor
patent: 4345646 (1982-08-01), Terrell
patent: 4530398 (1985-07-01), Greenlee et al.
patent: 4662453 (1987-05-01), Brisco
patent: 4921045 (1990-05-01), Richardson
patent: 5423382 (1995-06-01), Barton et al.
patent: 5771970 (1998-06-01), Jani

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