Patents by Inventor Dmitry Dveyrin

Dmitry Dveyrin 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).

  • Method and apparatus for conveying fluids, particularly useful with respect to oil wells
    Patent number: 6568477
    Abstract: A method and apparatus for conveying a fluid flowing through a flow passageway (16) in a tubing (7), by; introducing into the flow passageway (16) flow zones of small cross-sectional area (11) alternating with flow zones of large cross-sectional area (12) to produce high-velocity, low-pressure zones alternating with low-velocity, high-pressure zones; and providing abrupt transitions from the small cross-sectional area zones (11) to the large cross-sectional area zones (12) to produce a turbulent flow generating swirls and eddies (19) at such transitions. The method and apparatus are particulary useful in oil well applications where the fluid is an oil-gas mixture, but could be used in other applications where the fluid is a liquid-sand mixture, a gas-liquid mist, or a viscous liquid.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: May 27, 2003
    Assignee: Goal-Gas & Oil Associates Ltd.
    Inventor: Dmitry Dveyrin