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2 015 290

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IPC

(21) (22)

Application

4940743/03, 1991-04-04

(22)

Actual filing date

1991-04-04

(45)

Published

1994-06-30

(72)

Inventor

Sapozhnikov Eh.V.Zhukova M.G.Zadorozhnyj S.I.Kajdanov Eh.P.Il'Vovskij L.L.Rubin F.L.

(73)

Holder

Zhukova Marija GanifaevnaZadorozhnyj Stanislav Ivanovich

DOWNHOLE DRILL STRING ASSEMBLY Russian patent published in 1994 - IPC

Abstract RU 2015290 C1

FIELD: turbine drilling of controlled directional wells. SUBSTANCE: assembly includes drilling bit, near-bit drill string stabilizer, turbodrill, near-turbine drill string stabilizer and drill collars. Located between bit and turbodrill is shock absorber of longitudinal vibration. Installed above turbodrill is double-hinged stabilizer-deflector. Drill collars include two hinge joints with distance between hinges determined by relation given in invention description. Arranged between body of double-hinge stabilizer and shafts of each hinge joint are returning flexible members. EFFECT: higher efficiency. 1 dwg

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RU 2 015 290 C1

Authors

Sapozhnikov Eh.V.

Zhukova M.G.

Zadorozhnyj S.I.

Kajdanov Eh.P.

Il'Vovskij L.L.

Rubin F.L.

Dates

1994-06-30—Published

1991-04-04—Filed