Casing cutter

Details Casing cutter Casing cutter

1976-04-26

1978-01-17

Purser, Ernest R.

Wells

Means for perforating, weakening, bending or separating pipe...

Perforating or splitting cutter

175288, E21B 2900

Patent

active

040687112

ABSTRACT:
A casing cutter adapted to be lowered into a well to cut a plurality of casings cemented in the well and having a body with a central passageway therethrough with a piston slidably mounted therein which piston is provided with a restriction so that the piston moves axially within the body, a plurality of blades which are connected to the piston, and mounted in openings in the body, and guide means between the blades and the body whereby when the piston is actuated the blades are moved outwardly in a generally arcuate path so that they cut a very narrow annular space, which is substantially only that space which the blade displaces in its outer position.

REFERENCES:
patent: 973994 (1910-10-01), Swan
patent: 981306 (1911-01-01), Pollack
patent: 1485642 (1924-03-01), Stone
patent: 1777713 (1930-10-01), Braden
patent: 1814048 (1931-07-01), Lincoln
patent: 1913686 (1933-06-01), King
patent: 2322695 (1943-06-01), Kinzbach
patent: 2705998 (1955-04-01), Spang

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