Casing slotter

Details Casing slotter Casing slotter

1977-02-25

1978-10-10

Purser, Ernest R.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166 553, 175269, E21B 43112, E21B 2900

Patent

active

041191510

ABSTRACT:
A drill string mounted tool for cutting a pair of spaced, vertical slots in well tubular goods comprising a pair of knives adapted to be swung outwardly, scissors style, by a piston member, which is in turn operated by well fluid pressure from the surface. Slot cutting is accomplished by vertically reciprocating the drill string carrying the tool with the knives extended.

REFERENCES:
patent: 2215632 (1940-09-01), Brack et al.
patent: 2284170 (1942-05-01), Santiago
patent: 3005493 (1961-10-01), Crowe et al.
patent: 3083765 (1963-04-01), Kammerer
patent: 3225828 (1965-12-01), Wisenbaker et al.
patent: 3280913 (1966-10-01), Smith

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