Wells – Means for perforating – weakening – bending or separating pipe... – Cutter rotates circumferentially of pipe
Patent
1990-12-21
1992-04-07
Neuder, William P.
Wells
Means for perforating, weakening, bending or separating pipe...
Cutter rotates circumferentially of pipe
294 8634, E21B 2900
Patent
active
051018950
ABSTRACT:
A remedial bottom hole assembly for casing retrieval is disclosed having a spear and an inflatable packer utilized in combination with a pipe cutter. With such an assembly, after the spear is set and the casing is cut, the packer can be inflated to determine if circulation can be established without the removal of the spear and pipe cutter.
REFERENCES:
patent: 3087546 (1963-04-01), Woolley
patent: 3332492 (1967-07-01), Thomas
patent: 3489211 (1970-01-01), Kammerer, Jr.
patent: 4047568 (1977-09-01), Aulenbacher
patent: 5010955 (1991-04-01), Springer
Neuder William P.
Smith International Inc.
Vargo Robert M.
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