Patents by Inventor William Robert Portas, JR.

William Robert Portas, JR. 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).

  • Combined casing system and method
    Patent number: 9822614
    Abstract: The invention relates to a method for drilling and casing a wellbore using a drilling rig having a predetermined load capacity, using a casing scheme comprising two or more casing strings, and at least one combined casing string, which includes a first one of the casing strings fitting within a second casing string. The weight of the at least one combined casing string may exceed the load capacity of the drilling rig, and the weight of each of the parts of the at least one combined casing string is less than the load capacity.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: November 21, 2017
    Assignee: SHELL OIL COMPANY
    Inventors: Darrell Scott Costa, William Robert Portas, Jr., Djurre Hans Zijsling
  • COMBINED CASING SYSTEM AND METHOD
    Publication number: 20150047857
    Abstract: The invention relates to a method for drilling and casing a wellbore using a drilling rig having a predetermined load capacity, using a casing scheme comprising two or more casing strings, and at least one combined casing string, which includes a first one of the casing strings fitting within a second casing string. The weight of the at least one combined casing string may exceed the load capacity of the drilling rig, and the weight of each of the parts of the at least one combined casing string is less than the load capacity.
    Type: Application
    Filed: October 23, 2012
    Publication date: February 19, 2015
    Inventors: Darrell Scott Costa, William Robert Portas, JR., Djurre Hans Zijsling