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Vsesojuzny Nauchnoissledovatelsky Institut Burovoi Tekhniki

Veesojuzny Ordena Trudovogo Krasnogo Znameni Naucho-Issle

Jury V Vadetsky

Dmitry F Baldenko

Moisei T Gusman

Valery I Semenets

Anatoly M Kochnev

Samuil S Nikomarov

Evgeny Ivanov

Nikolai P Bezlepkin

Nikolai Dmitrievich Derkach

Valerian P Shumilov

Nikolai P Stroitelev

Jury F Potapov

Jury V Zakharov

Alexandr P Natarov

Talgat N Bikchurin

Ernst N Krutik

Vladimir N Andoskin

Valentina A Khabetskaya

Georgy F Chudakov

Jury S Vasiliev

Jury K Tolsky

Screw machine having a plurality of symmetrically arranged rotors

Downhole sectional screw motor, mounting fixture thereof and method of

A helical down-hole machine comprises a plurality of sections, each such section having a helical rotor and a helical stator arranged with a preselected eccentricity to form cavities of variable volume for the passage of fluid therethrough and positioned axially in series. The identical elements of these sections, rotors or stators, are rigidly interconnected. The rigid connection of at least one of these identical elements of said sections is detachable by frictionally jointing a projection provided at the end of one such element and a recess provided at the end of the adjacent element to be secured against relative angular and axial displacements in the process of rotation.

Multistage helical down-hole machine with frictional coupling of working

A multistart helical planetary gear motor, comprising a stator 3 having an internal helical thread and a rotor 4 having an external helical thread and arranged eccentrically within the stator 3. The rotor 4 and stator 3 form a kinematic couple which is in permanent engagement similarly to an internal gearing, with the number of the stator teeth being greater than the number of rotor teeth by unity. The ratio of pitches of the helical threads of the stator 3 and the rotor 4 is directly proportional to the ratio of their respective numbers of teeth. The ratio of pitches of the helical surfaces of the stator 3 and the rotor 4 to their respective pitch diameters ranges substantially from 5.5 to 12.

Bottom-hole multistart screw motor

In a reduction unit of a drilling motor comprising a casing, input and output shafts installed on supports, a reduction gear including sun and crown wheels, pinion carriers and planet pinions with supports located in a circular space between the wheels, an oil-filled chamber and a system of oil protection, there is provided a means eliminating the overloading of the reduction gear and a means eliminating the effect of torque fluctuations on the operation of the reduction gear while the supports of the input and output shafts installed on the ends of said shafts connected with the reduction gear are made in the form of articulated units taking axial loads and permitting angular displacements of the shafts, each of said shafts carrying a seal installed side by side with said support at the side opposite to the reduction gear, said seal being provided with a dividing space filled with a buffer fluid which protects said seal against contact with the drilling fluid.

Reduction unit of drilling motor

Growing community of inventors

Moscow, Russia

Jury V Vadetsky