Patents by Inventor William Robert PORTAS

William Robert PORTAS 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).

  • System and method for drilling a wellbore portion in a subterranean formation
    Patent number: 10871051
    Abstract: A portion of a wellbore is drilled in a subterranean formation, using a drilling string (140) disposed within a casing string (130) and extending through a cement retainer (150) disposed within the casing string. The drilling string can be retracted into the casing string to a location fully above the cement retainer, and subsequently the casing string can be cemented in the wellbore whereby maintaining the drilling string inside the casing in the wellbore.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: December 22, 2020
    Assignee: SHELL OIL COMPANY
    Inventors: Daniele Di Crescenzo, William Robert Portas
  • SYSTEM AND METHOD FOR DRILLING A WELLBORE PORTION IN A SUBTERRANEAN FORMATION
    Publication number: 20190249518
    Abstract: A portion of a wellbore is drilled in a subterranean formation, using a drilling string (140) disposed within a casing string (130) and extending through a cement retainer (150) disposed within the casing string. The drilling string can be retracted into the casing string to a location fully above the cement retainer, and subsequently the casing string can be cemented in the wellbore whereby maintaining the drilling string inside the casing in the wellbore.
    Type: Application
    Filed: June 30, 2017
    Publication date: August 15, 2019
    Inventors: Daniele DI CRESCENZO, William Robert PORTAS
  • 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