Angular whipstock alignment means

Details Angular whipstock alignment means Angular whipstock alignment means

1980-07-21

1981-12-29

Novosad, Stephen J.

Wells

Combined

33304, 1661176, 166255, 175 81, E21B 708, E21B 2300, E21B 4702

Patent

active

043077803

ABSTRACT:
A compass card is provided for use in achieving the angular alignment of a whipstock relative to a whipstock anchor having a keyway therein for subsequent insertion in a packer apparatus for use in a subterranean well. The compass card comprises an annular card having polar coordinates in mirror image reverse relationship on one face thereof and may have a plurality of sheet-like magnetic elements secured to the other face adjacent a central opening therein.

REFERENCES:
patent: 2077381 (1937-04-01), Eastman
patent: 2131849 (1938-10-01), Tolson
patent: 2301307 (1942-11-01), McMahan
patent: 2327658 (1943-08-01), Miller
patent: 2405717 (1946-08-01), Schadel
patent: 2438293 (1948-03-01), Livingston
patent: 2691507 (1954-10-01), Brown
patent: 2782524 (1957-02-01), Vogt
patent: 3052309 (1962-09-01), Eastman
patent: 3100019 (1963-08-01), Tims et al.

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