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2 187 615

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IPC

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Application

2001101807/03, 2001-01-18

(24)

Start date

2001-01-18

(22)

Actual filing date

2001-01-18

(45)

Published

2002-08-20

(72)

Inventor

Kochnev A.M.Goldobin D.A.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Proizvodstvennoe Ob"Edinenie Tekhnika"

SCREW HYDRAULIC DOWNHOLE MOTOR Russian patent published in 2002 - IPC

Abstract RU 2187615 C1

FIELD: well drilling equipment, particularly, screw hydraulic downhole motors for drilling oil and gas wells. SUBSTANCE: the essence of invention consists in that device for connection of motor rotor with shaft of bearing unit has intermediate shaft with external screw teeth for engagement with internal screw teeth of rotor. Surfaces of rotation circumscribed relative to tops of projections and hollows of external screw teeth of intermediate shaft are made barrel-shaped. EFFECT: increased operate reliability of motor units use for drilling vertical, directional and horizontal wells. 2 cl, 4 dwg

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RU 2 187 615 C1

Authors

Kochnev A.M.

Goldobin D.A.

Dates

2002-08-20—Published

2001-01-18—Filed

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