Patents by Inventor Marco Brignoli

Marco Brignoli 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 fluids comprising oil emulsions in water
    Patent number: 6632777
    Abstract: Composition of water-based drilling fluids characterized in that they comprise an oil in water emulsion.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: October 14, 2003
    Assignees: ENI S.p.A., Enitecnologie S.p.A
    Inventors: Stefano Carminati, Alberto Guarneri, Marco Brignoli
  • Water-based drilling fluid containing anions with a high hydrodynamic radius
    Patent number: 6500785
    Abstract: Composition of water-based drilling fluids characterized in that they comprise anions with a high hydrodynamic radius.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: December 31, 2002
    Assignees: ENI S.p.A., Enitecnologie S.p.A.
    Inventors: Stefano Carminati, Marco Brignoli
  • Core sampling method and core sampler therefor
    Patent number: 6164389
    Abstract: A core sampling method, particularly for the oil industry, wherein actual core sampling is performed by means of a core sampler (1) comprising at least one Inner barrel (5), an outer barrel (2) and a bit (3), and a substantially axial compressive force (F) is exerted on the top (7A) of a core sample (7) being formed, at least during a major part of the core sampling process, said force being within a range determined particularly on the basis of the material of the core sample (7), whereafter the force (F) is removed at the latest before the core sample (7) is withdrawn from the inner barrel (5). A core sampler for carrying out the method is also provided.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: December 26, 2000
    Assignee: Dresser Industries, Inc.
    Inventors: Philippe Fanuel, Rune Holt, Cor Kenter, Marco Brignoli
  • Device for measuring the permeability of rock fragments
    Patent number: 5844136
    Abstract: The present invention relates to a device used for the direct measurement of the permeability of rock fragments coming directly from the drilling of an oil well and commonly called cuttings, consisting of a hollow cylindrical body (c) that presents an inlet hole for the fluid (i), a thread for closing it (h) and a hydraulic seal (g) in which is placed the sample holder disk (d) which rests on the seal (g) and is overlapped by a porous sintered steel septum (e) on which a closing plug (f) is situated with an outlet hole for the fluid (i') and the same is also provided with a thread (h') to enable it to close on the body (c).The device can be used to obtain, directly on site, the measurement of permeability along the whole length of an oil well.
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: December 1, 1998
    Assignee: Agip S.p.A.
    Inventors: Alberto Marsala, Marco Brignoli, Frederic Santarelli, Adriano Figoni, Elio Rossi