Permanent whipstock

Details Permanent whipstock Permanent whipstock

1994-05-13

1996-02-27

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

1661176, 166217, 175 81, E21B 708, E21B 2300

Patent

active

054941113

ABSTRACT:
This invention relates to a permanent whipstock assembly which uses camming pivot arms to secure the whipstock at the desired location within a cased wellbore. Camming pivot arms are pivotally attached to the downhole end of a whipstock housing and are further attached to a slip pad. Intentionally induced relative movement of the slip pad and the whipstock housing causes the camming pivot arms to pivot in such a manner that slip pad housing 4 and slip pad 5 are forced away from each other and cammed into the cased borehole. The invention relates specifically to a device that is particularly adapted to be lowered through a small diameter and later to be activated and set in a much larger casing or hole diameter.

REFERENCES:
patent: 1812880 (1931-07-01), Kinzbach et al.
patent: 1821426 (1931-09-01), Dumm et al.
patent: 2105722 (1938-01-01), Brrrett et al.
patent: 2170284 (1939-08-01), Eastman
patent: 2401893 (1946-06-01), Williams, Jr.
patent: 2445100 (1948-07-01), Wright
patent: 2699920 (1955-01-01), Zublin
patent: 5035292 (1991-07-01), Bailey et al.
patent: 5222554 (1993-06-01), Blount et al.
patent: 5361833 (1994-11-01), Schock et al.
ARCO Drawing Figures A & B (Undated).

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