Patents by Inventor Alastair MacFarlane

Alastair MacFarlane 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).

  • Drilling method
    Patent number: 8550183
    Abstract: A drilling method comprises controlling operation of a drill string to maintain at least a portion of the drill string in forward whirl.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: October 8, 2013
    Assignee: National Oilwell Varco, L.P.
    Inventors: Ian Forster, Alan Eddison, Alastair MacFarlane
  • Drilling Method
    Publication number: 20100089647
    Abstract: A drilling method comprises controlling operation of a drill string to maintain at least a portion of the drill string in forward whirl.
    Type: Application
    Filed: September 29, 2009
    Publication date: April 15, 2010
    Inventors: Ian Forster, Alan Eddison, Alastair MacFarlane
  • Flow Diverter
    Publication number: 20080029268
    Abstract: A downhole tool comprises a body defining a fluid inlet and two or more fluid outlets. A valve arrangement cycles the proportion of fluid directed from the inlet to each of the outlets. One of the outlets may be associated with a fluid pressure responsive device, such as a cleaning blade.
    Type: Application
    Filed: August 8, 2005
    Publication date: February 7, 2008
    Inventor: Alastair Macfarlane