Patents by Inventor Douglas G. Wood

Douglas G. Wood 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 for monitoring acoustic emissions
    Patent number: 5148405
    Abstract: A non-intrusive method for the determination of characteristics of slug flow in a multiphase flow pipeline comprising the steps of: detecting the acoustic emissions from the pipeline in the ultrasonic frequency range by means of at least one sound transducer, the output from which is an analogue electrical signal, converting the analogue signal to a digital signal, and analyzing the digital signal to determine the characteristics of the slug flow.The characteristics of slug flow which may be determined include distinguishing slug flow from wave flow, the frequency of slugging and the velocity and length of slugs. The method is particularly suitable for studying multiphase flow comprising oil, gas and water.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: September 15, 1992
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Ronald M. Belchamber, Derek Brister, Michael P. Collins, John Hill, Robert Watkins, Douglas G. Wood