Method and apparatus to cut and remove casing

Details Method and apparatus to cut and remove casing Method and apparatus to cut and remove casing

1992-09-22

1993-10-19

Britts, Ramon S.

Wells

Processes

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

166 556, 166216, 166301, E21B 2900

Patent

active

052537102

ABSTRACT:
An apparatus is established which facilitates the cutting and removal of well casing on a single trip into the wellbore. The apparatus is run into the wellbore on the tubing string and provides a rotatable sleeve including grapples adapted to engage the casing, and to facilitate removal of the casing. The apparatus also includes cutting assemblies coupled to the mandrel, which may be rotated so as to cut the casing, thereby facilitating removal of the casing through use of the grapples.

REFERENCES:
patent: 2991834 (1961-07-01), Kennard
patent: 3332492 (1967-07-01), Thomas
patent: 3419077 (1968-12-01), Sanford
patent: 3570598 (1971-03-01), Johnson
patent: 4047568 (1977-09-01), Aulenbacher
patent: 4646826 (1987-03-01), Bailey et al.
patent: 4811785 (1989-03-01), Weber
patent: 5014780 (1991-05-01), Skipper
Publication by The Red Baron (Oil Tools Rental), entitled The Red Baron-Sales and Service Catalogue, pp. 12-15, dated "1990-91", published in the 1990-91 Composite Catalog.
Publication of Houston Engineers, Inc., entitled "Universal Rotating and Releasing Spear," p. 14, published 1983.
Catalogue of A-Z International Tool Co., entitled "A-Z Hydraulic Spear" pp. 183 and 184, published 1976-77.
A-Z International Tool Co., entitled "A-Z One Trip Cut and Recover Method," p. 192, published 1976-77.
A-Z Grant General Catalog 1990-91, pp. 120-8, 120-9, published in the 1990-91 Composite Catalog.

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