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2 345 853

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IPC

B21B19/06(2006-01-01)

B09B3/00(2006-01-01)

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Application

2007105702/02, 2007-02-15

(24)

Start date

2007-02-15

(22)

Actual filing date

2007-02-15

(45)

Published

2009-02-10

(72)

Inventor

V'Jugina Ljudmila Anatol'EvnaDmitriev Anatolij ValentinovichRjabov Igor' Evgen'EvichSyvorotkin Aleksandr SergeevichShulika Igor' Pavlovich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

MANUFACTURING METHOD OF HEAVY-WALLED TUBES Russian patent published in 2009 - IPC B21B19/06 B09B3/00

Abstract RU 2345853 C2

FIELD: metallurgy.

SUBSTANCE: method includes double-line screw rolling of heated tubular billet plug rolling by three rollers and screw calibration by three rollers. In the capacity of blank there are used coupling fittings of served drill pipes. From drill pipe there are cut lock ends, heated and deformed by three double-extended rollers with diameter in necking not less than 3.5 times exceeding diameter of drill pipe, and with deforming section angle of slope 4-4.5 degree.

EFFECT: widening of manufacturing capabilities and expenditures reduction for manufacturing.

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RU 2 345 853 C2

Authors

V'Jugina Ljudmila Anatol'Evna

Dmitriev Anatolij Valentinovich

Rjabov Igor' Evgen'Evich

Syvorotkin Aleksandr Sergeevich

Shulika Igor' Pavlovich

Dates

2009-02-10—Published

2007-02-15—Filed