Casing cutting and retrieving tool

Details Casing cutting and retrieving tool Casing cutting and retrieving tool

1993-07-23

1994-06-07

Dang, Hoang C.

Wells

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

Cutter rotates circumferentially of pipe

166 558, 166361, E21B 3116

Patent

active

053181158

ABSTRACT:
A casing cutting and retrieving tool is described which includes a grapple device (2) for mechanically gripping casing to be retrieved. A mud motor having upper and lower stators (70, 73) and a rotor is also provided. The upper stator (70) acts as a suspension device for suspending the grapple device (2) from a drill string, and the upper stator (70) is mechanically fast with the grapple device (2). A rotary cutter (76) depends from a drive end (74) of the rotor and is rotatable by the rotor to cut the casing at a location below the grapple device (2).

REFERENCES:
patent: 3489211 (1970-01-01), Kammerer, Jr.
patent: 3983936 (1976-10-01), Kennard et al.
patent: 4047568 (1977-09-01), Anlenbacher
patent: 4191255 (1980-03-01), Rives
patent: 4550781 (1985-11-01), Kagler, Jr.
patent: 4703802 (1987-11-01), Bryan et al.
patent: 4969514 (1990-11-01), Morris et al.

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