Patents by Inventor Boris M. Parfenov

Boris M. Parfenov 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).

  • Patent number: 4407017
    Abstract: A method for controlling drilling process based on the use of an adaptive model of drilling process comprises two control modes of which one is a multicycle rock formation trial mode and the other mode is a drilling mode proper. During the first cycle of the trial mode the drilling speed is determined on the basis of pre-set values of controlled parameters and approximate values of coefficients of the adaptive model being corrected and this drilling speed is compared to the value of drilling speed as measured during the first cycle; and corrected values of a respective coefficient of the adaptive model being corrected are formed based on the comparison results; and, taking into account these values, the values of control signals close to optimum values are determined which are the settings for acting on the bit during the next trial mode cycle. In each next cycle the corrected coefficients of the preceding cycle are used for determining control signals.
    Type: Grant
    Filed: February 18, 1981
    Date of Patent: September 27, 1983
    Inventors: Valentin V. Zhilikov, Boris I. Motsokhein, Boris M. Parfenov