Boring or penetrating the earth – Boring with explosion in inaccessible hole – Concave-shaped charge
Patent
1990-08-07
1992-03-17
Novosad, Stephen J.
Boring or penetrating the earth
Boring with explosion in inaccessible hole
Concave-shaped charge
102310, 102320, 102321, E21B 43116
Patent
active
050959999
ABSTRACT:
A through-tubing perforating gun includes an angularly shaped base strip having first and second surfaces and including a plurality of recesses in the first surface and a plurality of recesses in the second surface. A plurality of capsule charges are mounted in the plurality of recesses in the first and second surfaces of the base strip and are held in place within the recesses by a plurality of support rings connected to the base strip. The base strip is made of a material which will allow the base strip to withstand detonation of the capsule charges and will not shatter when the charges detonate; however, the support rings are made of a material which will allow the support rings to shatter when the capsule charges detonate. As a result, when the charges detonate, the support rings will shatter into a multitude of pieces allowing the charges to fall to a bottom of the well; however, the base strip will not shatter when the charges detonate and may be retrieved from the borehole for subsequent inspection to determine which charges detonated and which charges did not detonate.
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Encyclopedia/Handbook, "Materials, Parts and Finishes", H. R. Clauser, 1984 edition, pp. 15-20.
Metals Handbook (Ninth Edition)-vol. 2, "Properties and Selection: Nonferrous Alloys and Pure Metals", 1979 edition, pp. 123-139.
Bouchard John H.
Garrana Henry N.
Novosad Stephen J.
Schlumberger Technology Corporation
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