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2 065 931

(13)

C1

(51)

IPC

(21) (22)

Application

94020360/03, 1994-05-31

(22)

Actual filing date

1994-05-31

(45)

Published

1996-08-27

(72)

Inventor

Kashik A.S.Shakirov R.A.

(73)

Holder

Tovarishchestvo S Ogranichennoj Otvetstvennost'Ju Md Sejs Novye Tekhnologii

METHOD FOR SECONDARY OPENING OF PRODUCTIVE STRATUM Russian patent published in 1996 - IPC

Abstract RU 2065931 C1

FIELD: petroleum industry. SUBSTANCE: for perforation work in holes which open productive strata and to ensure reliable communication of productive stratum with string, perforation channels are drilled in hole walls by means of drill provided with drilling mechanism having cutting tool. In drilling, thread is made in walls of perforation channel by means of screw tap installed in tail end of cutting tool. On completion of drilling, each perforation channel is isolated from ambient medium by case union with outer thread which is screwed in bore of perforation channel. EFFECT: high efficiency.

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RU 2 065 931 C1

Authors

Kashik A.S.

Shakirov R.A.

Dates

1996-08-27—Published

1994-05-31—Filed

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