F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
103/20
F04D 3/02 (2006.01)
Patent
CA 1275198
ROTOR OF A SCREW HYDRAULIC DOWNHOLE MOTOR, METHOD FOR ITS PRODUCTION AND A DEVICE FOR CARRYING SAME INTO EFFECT Abstract of the Disclosure A rotor of a screw hydraulic downhole motor, made as a hollow multiple-start screw featuring a substan- tially constant wall thickness. The ratio of the length of the rotor cross-sectional outside contour to the length of the circumscribed circle of said contour is substantially within 0.9 and 1.05. When making the rotor a forming element is inserted into a tubular blank, and a fluid pressure is applied to the outside blank surface. A device for making the rotor comprises a hollow housing accommodating a forming element instal- led on centring bushings. The bushings have fitting areas adapted for the ends of the tubular blank to fit thereon.
504674
Goldobin Vladimir B.
Kochnev Anatoly M.
Nikomarov Samuil S.
Vshivkov Andrei N.
Goldobin Vladimir B.
Kochnev Anatoly M.
Nikomarov Samuil S.
Permsky Filial Vsesojuznogo Nauchno-Issledovatelskogo Institutab
Swabey Ogilvy Renault
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