Patents by Inventor Donald George Maynard

Donald George Maynard 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).

  • Erosion resistant, self and/or artificial external cleaning solid exclusion system
    Patent number: 7066252
    Abstract: Disclosed is a tool having an axial passage, a top and a bottom, and a sidewall portion possessing porosity and permeability properties and constructed of a material having equal or better erosion properties than any substances produced and/or injected into any earth formation, said tool functioning as a filter to permit solids to pass or not pass depending upon their size, characterized in that the porosity and permeability can be programmed to any given value radially and longitudinally, said tool further including a means for circulating from outside, inward or from the inside outward to enable cleaning, wherein optionally said tool can be used in multiples.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: June 27, 2006
    Assignee: Shell Oil Company
    Inventors: Wilhelmus Hubertus Paulus Maria Heijnen, Donald George Maynard
  • Erosion resistant, self and/or artificial external cleaning solid exclusion system
    Publication number: 20040050217
    Abstract: Disclosed is a tool having an axial passage, a top and a bottom, and a sidewall portion possessing porosity and permeability properties and constructed of a material having equal or better erosion properties than any substances produced and/or injected into any earth formation, said tool functioning as a filter to permit solids to pass or not pass depending upon their size, characterized in that the porosity and permeability can be programmed to any given value radially and longitudinally, said tool further including a means for circulating from outside, inward or from the inside outward to enable cleaning, wherein optionally said tool can be used in multiples.
    Type: Application
    Filed: August 29, 2002
    Publication date: March 18, 2004
    Inventors: Wilhelmus Hubertus Paulus Maria Heijnen, Donald George Maynard