Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Patent
1991-08-12
1992-09-22
Novosad, Stephen J.
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
166 55, 89 115, 102275, E21B 43116
Patent
active
051488680
ABSTRACT:
The invention, as set forth in this disclosure, includes a perforating assembly for perforation of well tubing. This perforating assembly can be dropped by hand without attachments of any kind. The outside diameter of this manually-dropped tubing perforating assembly allows it to free fall within tubing to the plug or pump near the bottom of a well. It incorporates a firing head with secured frangible pin and only one moving part; and it can be detonated mechanically. After this apparatus reaches a plug or pump near the bottom of a well, an impact bar can be dropped by hand to hit the apparatus. This detonates an explosive charge which blasts a hole through the tubing. The apparatus remains in the tubing on top of the plug or pump, so when the tubing is pulled from the well, the apparatus is retrieved along with the tubing. The use of electric wireline or slickline operations to lower and to retrieve a perforator from a well is eliminated with the use of this invention.
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patent: 4512406 (1985-04-01), Vann et al.
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patent: 4624307 (1986-11-01), Kinley et al.
patent: 4632034 (1986-12-01), Colle, Jr.
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