Slip releasing apparatus

Details Slip releasing apparatus Slip releasing apparatus

1985-02-21

1986-04-22

Leppink, James A.

Wells

Expansible anchor or casing

With wedge or cam and friction drag

166140, E21B 2300

Patent

active

045835900

ABSTRACT:
The slip releasing apparatus described herein includes a unitary slip member having wall engaging teeth located in diagonally opposite upper and lower ends and carries a pair of releasing pins mounted therein that project inwardly therefrom. The pins are disposed in recesses or holes formed in a slip carrier member that extends through the slip member. The recesses are configured in the carrier member so that an upward pull on the carrier member moves a release surface onto the carrier member into engagement with the pins in the slip member to cause pivotal or rotational movement of the slip member about a fulcrum formed by the engagement between the teeth on the lower end of this slip member and the pipe in which the slip member is run.

REFERENCES:
patent: 2631670 (1953-03-01), Armentrout
patent: 3548936 (1970-12-01), Kilgore et al.
patent: 3779314 (1973-12-01), Read
patent: 3818988 (1974-06-01), Read
patent: 4022274 (1977-05-01), Jett
patent: 4488595 (1984-12-01), Akkerman
patent: 4498534 (1985-02-01), Lindsey, Jr.

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