Patents by Inventor Duncan Holdsworth

Duncan Holdsworth 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).

  • RATE ENHANCEMENT OF GAS CAPTURE PROCESSES
    Publication number: 20230249127
    Abstract: The present invention relates to a method of capturing CO2 from a gas stream. The method uses a two liquid phase capture composition.
    Type: Application
    Filed: July 14, 2021
    Publication date: August 10, 2023
    Applicant: C-Capture Ltd
    Inventors: Douglas Barnes, Caspar Schoolderman, Duncan Holdsworth, Christopher Rayner
  • Process for acidizing
    Patent number: 10604696
    Abstract: The invention relates to in-situ acidizing processes that involve the dissolution of an acid-soluble material. Treatment fluids have been identified that can effectively dissolve acid-soluble materials at low temperatures, such as temperatures of 30° C. or lower. In some embodiments, the processes may also be usefully employed at higher temperatures. The processes and treatment fluids of the invention can advantageously be used to dissolve acid-soluble materials, including filter cakes, in underground formations.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: March 31, 2020
    Assignee: Cleansorb Limited
    Inventors: Ralph Edmund Harris, Duncan Holdsworth
  • Process for treating an underground formation
    Patent number: 9982183
    Abstract: The present invention relates to processes for consolidating an underground formation with a consolidating mineral. The consolidating material is a carbonate and is produced from an alkaline treatment fluid containing, in at least some embodiments, environmentally friendly and inexpensive components. In one embodiment, the process can be applied to consolidation of an underground formation during or following drilling. The present invention also provides a treatment fluid suitable for use in such processes.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: May 29, 2018
    Assignee: Cleansorb Limited
    Inventor: Duncan Holdsworth
  • Process for Acidizing
    Publication number: 20160333256
    Abstract: The invention relates to in-situ acidizing processes that involve the dissolution of an acid-soluble material. Treatment fluids have been identified that can effectively dissolve acid-soluble materials at low temperatures, such as temperatures of 30° C. or lower. In some embodiments, the processes may also be usefully employed at higher temperatures. The processes and treatment fluids of the invention can advantageously be used to dissolve acid-soluble materials, including filter cakes, in underground formations.
    Type: Application
    Filed: January 12, 2015
    Publication date: November 17, 2016
    Inventors: Ralph Edmund Harris, Duncan Holdsworth
  • Process for Treating an Underground Formation
    Publication number: 20140303049
    Abstract: The present invention relates to processes for consolidating an underground formation with a consolidating mineral. The consolidating material is a carbonate and is produced from an alkaline treatment fluid containing, in at least some embodiments, environmentally friendly and inexpensive components. In one embodiment, the process can be applied to consolidation of an underground formation during or following drilling. The present invention also provides a treatment fluid suitable for use in such processes.
    Type: Application
    Filed: October 31, 2012
    Publication date: October 9, 2014
    Applicant: Cleansorb Limited
    Inventor: Duncan Holdsworth