Patents by Inventor Abeksandr N. Sorokin

Abeksandr N. Sorokin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polycentric reamer
    Patent number: 5372209
    Abstract: A polycentric reamer having a body thrust unit and reaming unit is especially useful for locally reaming a borehole beneath a casing string. By asymmetrically positioning a reaming unit within a body formed from non-coaxial mated cylinders, superior results are achieved. These results include minimizing wear on the casing string.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: December 13, 1994
    Assignee: DCD, Ltd.
    Inventors: Ludvig A. Raihert, Takov A. Edelman, Alexey G. Messer, Abeksandr N. Sorokin, Sergej P. Krivonenkov, Rudolf S. Alikin, Yaroslaw S. Gavrilov