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2 018 620

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IPC

(21) (22)

Application

5033462/03, 1992-03-20

(22)

Actual filing date

1992-03-20

(45)

Published

1994-08-30

(72)

Inventor

Budjanskij Vigdor SolomonovichBrudnyj-Cheljadinov Sergej Jul'EvichKonstantinov Igor' LeonidovichKrekin Mikhail Vasil'Evich

(73)

Holder

Budjanskij Vigdor SolomonovichBrudnyj-Cheljadinov Sergej Jul'EvichKonstantinov Igor' LeonidovichKrekin Mikhail Vasil'Evich

STATOR OF DOWNHOLE GEAR-ROTARY MACHINE Russian patent published in 1994 - IPC

Abstract RU 2018620 C1

FIELD: well drilling in mining industry. SUBSTANCE: stator includes body accommodating working sleeve with inner screw surface and metal base and sub threaded to body. Metal base is made in form of thin-walled bushing and annular hollow formed by working sleeve and body is isolated from external medium. Relation of bushing thickness is its middle part to sleeve outer diameter equals 0.02-0.09, and relation of radial size of hollow to bushing thickness in its middle part is within 0.02-0.15. Besides, bushing has through holes and connected with sub by means of threaded joint. EFFECT: higher efficiency. 3 cl, 2 dwg

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RU 2 018 620 C1

Authors

Budjanskij Vigdor Solomonovich

Brudnyj-Cheljadinov Sergej Jul'Evich

Konstantinov Igor' Leonidovich

Krekin Mikhail Vasil'Evich

Dates

1994-08-30—Published

1992-03-20—Filed