Rotary expansible chamber devices – Unlike helical surfaces on relatively wobbling rotating...
Reexamination Certificate
2007-06-05
2007-06-05
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
Unlike helical surfaces on relatively wobbling rotating...
C418S150000, C418S152000, C418S156000, C175S106000, C175S107000
Reexamination Certificate
active
10550245
ABSTRACT:
The invention relates to gerotor mechanisms for screw downhole motors used for drilling oil and gas wells, to screw pumps for producing oil and pumping fluids and to general purpose screw motors. The profiles of a rotor (3) and stator (1) are outlined in the end cross section thereof in the form of the envelop of the initial contour of a rack-type tool, which is formed by conjugation of circle arcs when said initial contour of the rack-type tool is run without sliding along corresponding tool circles. The arc radii of the circle arcs of the initial contour are calculated according to determined relations. Said invention makes it possible to improve energy characteristics, increase a life service and producibility, to reduce hydromechanical losses and costs.
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Andoskin Vladimir Nikolaevich
Astafiev Sergei Petrovich
Fadeev Mikhail Valerievich
Glinkin Aleksei Sergeevich
Pushkarev Maksim Anatolievich
Fitch Even Tabin & Flannery
Obschestvi S Ogranichennoi Otvetstvennostyu “Firma Radius
Trieu Theresa
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