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Machine translation
1. (WO1980002176) MULTIPLE-THREAD SCREW-TYPE DRIVE FOR USE IN THE BOREHOLE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002176    International Application No.:    PCT/SU1980/000057
Publication Date: 16.10.1980 International Filing Date: 31.03.1980
IPC:
E21B 4/02 (2006.01), F01C 1/10 (2006.01)
Applicants:
Inventors:
Priority Data:
2738151 29.03.1979 SU
Title (EN) MULTIPLE-THREAD SCREW-TYPE DRIVE FOR USE IN THE BOREHOLE
(FR) DISPOSITIF D"ENTRAINEMENT UTILISABLE DANS DES TROUS DE SONDAGE, A PAS MULTIPLES ET DE TYPE A VIS
Abstract: front page image
(EN)A multiple-thread screw-type planetary drive comprising a stator (3) with a thread on its internal surface and a rotor (4) with a thread on its external surface, the rotor (4) being excentrically placed inside the stator (3). The rotor (4) and the stator (3) constitute a kinematic pair of permanent contact with internal gearing, the number of teeth of the stator (3) being by one tooth more than the number of teeth of the rotor (4). The ratio between the thread pitches of the stator (3) and the rotor (4) is directly proportionate to the corresponding ratio between the teeth numbers. The ratio of pitches of the threaded surfaces of the stator (3) and the rotor (4) to their corresponding pitch mean diameters lies essentially within a range from 5.5 to 12.
(FR)Un dispositif d"entrainement planetaire du type a vis planetaire comprenant un stator (3) avec un pas de vis a sa surface interne et un rotor (4) avec un pas de vis a sa surface externe, le rotor (4) etant place excentriquement a l"interieur du stator (3). Le rotor (4) et le stator (3) constituent une paire cinetique de contact permanent avec un engrenage interne, le nombre de dents du stator (3) etant superieur d"une unite a celui rotor (4). Le rapport entre le filetage du pas de vis du stator (3) et celui du rotor (4) est directement proportionnel au rapport de leur nombre de dents. Le rapport entre les filetages des surfaces a pas de vis du stator (3) et du rotor (4) et le diametre moyen de leur filetage correspondant se trouve dans une gamme de 5,5 a 12.
Designated States:
Publication Language: Russian (RU)
Filing Language: Russian (RU)