Patents by Inventor Madhawa Ratnayake

Madhawa Ratnayake 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).

  • Pressure differential device with constant pressure drop
    Patent number: 10233726
    Abstract: In one aspect, an apparatus for use in a wellbore is disclosed, including: an inlet; an outlet; and a variable flow restriction configured to provide a predetermined constant pressure drop between the inlet and the outlet in response to a range of inlet flow rates. In another aspect, a method for providing a fluid flow within a wellbore is disclosed, including: providing the fluid flow to an inlet; restricting the fluid flow to provide a predetermined constant pressure drop between the inlet and an outlet in response to a range of fluid flow rates; and providing the fluid flow to the wellbore from the outlet.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: March 19, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Zhi Y. He, Madhawa Ratnayake, Kun Yuan, Carlos P. Izaguirre, David Teale, Darrin L. Willauer
  • PRESSURE DIFFERENTIAL DEVICE WITH CONSTANT PRESSURE DROP
    Publication number: 20160053577
    Abstract: In one aspect, an apparatus for use in a wellbore is disclosed, including: an inlet; an outlet; and a variable flow restriction configured to provide a predetermined constant pressure drop between the inlet and the outlet in response to a range of inlet flow rates. In another aspect, a method for providing a fluid flow within a wellbore is disclosed, including: providing the fluid flow to an inlet; restricting the fluid flow to provide a predetermined constant pressure drop between the inlet and an outlet in response to a range of fluid flow rates; and providing the fluid flow to the wellbore from the outlet.
    Type: Application
    Filed: August 22, 2014
    Publication date: February 25, 2016
    Applicant: Baker Hughes Incorporated
    Inventors: Zhi Yong He, Madhawa Ratnayake, Kun Yuan, Carlos P. Izaguirre, David Teale, Darrin L. Willauer