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2 098 607

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C1

(51)

IPC

(21) (22)

Application

95118055/03, 1995-10-12

(22)

Actual filing date

1995-10-12

(45)

Published

1997-12-10

(72)

Inventor

Gabdullin R.G.Osnos V.B.Strakhov D.V.

(73)

Holder

Gabdullin Rafagat Gabdelvaleevich

DEVICE FOR CREATING PERFORATION CHANNELS IN CASING STRING IN BOREHOLE Russian patent published in 1997 - IPC

Abstract RU 2098607 C1

FIELD: oil and gas production. SUBSTANCE: device consists of tubular body on which hydraulic cylinder with spring-loaded piston is placed. Device also has wedge-type pusher with tail and cutter holder with perforation cutters interacting with wedge pusher. Tubular body is connected with tail to transmit reciprocating displacement to the latter at lowest piston position. Hydraulic cylinder may reciprocate in relation to tubular body. Cutter holder is placed on the end of tail. EFFECT: simplified device and enabled perforation of small- diameter casing strings. 2 dwg

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RU 2 098 607 C1

Authors

Gabdullin R.G.

Osnos V.B.

Strakhov D.V.

Dates

1997-12-10—Published

1995-10-12—Filed

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