Patents by Inventor Stuart Tomisson

Stuart Tomisson 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).

  • INVERT DRILLING FLUIDS
    Publication number: 20140182942
    Abstract: There is described an invert emulsion wellbore fluid that includes: an oleaginous external phase; a non-oleaginous internal phase, wherein a ratio of the oleaginous external phase and non-oleaginous internal phase is less than 50:50 by volume; an emulsifier; and a rheological additive comprising a sulphonated polymer formed from 100 to 10,000 monomers. There is also described a method of drilling a subterranean hole using the invert emulsion drilling fluid.
    Type: Application
    Filed: March 21, 2012
    Publication date: July 3, 2014
    Applicant: M-I DRILLING FLUIDS U.K. LIMITED
    Inventors: Michael Hayward Hodder, John William Chapman, Stuart Tomisson