The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 1986
Filed:
Feb. 09, 1984
Dmitry F Baldenko, Moscow, SU;
Jury V Vadetsky, Moscow, SU;
Moisei T Gusman, Moscow, SU;
Anatoly M Kochnev, Perm, SU;
Samuil S Nikomarov, Perm, SU;
Valery I Semenets, Moscow, SU;
Jury K Tolsky, Moscow, SU;
Jury V Zakharov, Perm, SU;
Valerian P Shumilov, Moscow, SU;
Abstract
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.