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2 229 595

(13)

(51)

IPC

(21) (22)

Application

2002129856/03, 2002-11-06

(24)

Start date

2002-11-06

(22)

Actual filing date

2002-11-06

(45)

Published

2004-05-27

(72)

Inventor

Kju N.G.

(73)

Holder

Institut Gornogo Dela So Ran Gosudarstvennogo Uchrezhdenija) G.Novosibirsk, Krasnyj Pr-T, Igd So Ran

DEVICE FOR FORMING DIRECTED CRACKS IN WELLS Russian patent published in 2004 - IPC

Abstract RU 2229595 C1

FIELD: mining industry. SUBSTANCE: device has cylindrical body and working tips in form of wedges on its outer surface. In cylindrical body an axial opening is made, into which a plunger is inserted, which has stepped thickened portion and ring-shaped shelf on the free end. On the end of cylindrical body a wedge is formed. A spring is put on the plunger between ring-shaped shelf and cylindrical body. EFFECT: increased effectiveness of device operation due to lowered impact energy necessary for cracks forming. 3 cl, 3 dwg

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RU 2 229 595 C1

Authors

Kju N.G.

Dates

2004-05-27—Published

2002-11-06—Filed