Patents by Inventor Mark L. Kiselman

Mark L. Kiselman 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).

  • Arrangement for cleaning internal surface of casing strings
    Patent number: 4809779
    Abstract: An arrangement for cleaning the internal surface of casing strings, comprises a hollow cylindrical body with slots provided around the periphery thereof. The slots accommodate extendable cutting blades. The cutting blades are moved with the aid of walls of an elastic vessel. The elastic vessel is disposed inside the body and adapted to be communicated with a source of compressed fluid medium. The elastic vessel is disposed in a bushing installed coaxially with the body and provided with longitudinal ports. The ports are arranged opposite to the slots of the body and are equipped with flat spring elements. The flat spring elements substantially completely cover the ports of the bushing and cooperate by one side with the cutting blades and by the other side, with the elastic vessel.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: March 7, 1989
    Assignee: Vsesojuzny Nauchno-Issledovatelsky Institut Pokrepleniju Skvazhin I Burovym Rastvoram
    Inventors: Oleg A. Ledyashov, Stanislav F. Petrov, Stanislav P. Goryainov, Mark L. Kiselman, Anatoly M. Laptev, Viktor I. Mishin