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2 025 568

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C1

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IPC

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Application

4916088/03, 1991-03-04

(22)

Actual filing date

1991-03-04

(45)

Published

1994-12-30

(72)

Inventor

Demjanenko Nikolaj Aleksandrovich[By]Butov Jurij Aleksandrovich[By]Lerman Arkadij Samuilovich[By]

(73)

Holder

Gosudarstvennyj Nauchno-Issledovatel'Skij I Proektnyj Institut Neftjanoj I Gazovoj Promyshlennosti

DEVICE FOR WELL WALLS MUD GROUTING Russian patent published in 1994 - IPC

Abstract RU 2025568 C1

FIELD: mining. SUBSTANCE: screw-shaped vane swirler is installed over the drill bit in the hollow case with mounting members in the upper and lower parts for building in the drill pipe string. Blades of the swirler are combined with upper edges of the guiding spirals, the lower blades being arranged on the level of inlets in corresponding nozzles. Length of the swirler blades corresponds with the expression derived in description of the invention. EFFECT: enhanced efficiency of well walls mud grouting. 3 dwg

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RU 2 025 568 C1

Authors

Demjanenko Nikolaj Aleksandrovich[By]

Butov Jurij Aleksandrovich[By]

Lerman Arkadij Samuilovich[By]

Dates

1994-12-30—Published

1991-03-04—Filed

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