Patents by Inventor Ricardo Munoz Freitas

Ricardo Munoz Freitas 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).

  • Publication number: 20100316328
    Abstract: Fiber optic position transducer that includes a magnetic or electromagnetic element, one or more segments of magnetostrictive material, Fiber Bragg Grating Sensors, a rod of material that is impenetrable to magnetic fields, optical fiber. One or more of the sensors is fixed upon a segment of magnetostrictive material, which is fixed to a rod, and may only be displaced longitudinally. The Fiber Bragg Grating Sensors have different wave lengths and are made of the same optical fiber. The magnetic or electromagnetic element included may be made of NdFeB (Neodymium Iron Boron) or metal alloys of TbDyFe (Terbium, Dysprosium and Iron), such as TX, Terphenol-D and others. It is applied to a control flow valve in an oil well, and it also refers to the calibration process of the position of the transducer.
    Type: Application
    Filed: December 28, 2009
    Publication date: December 16, 2010
    Applicants: PETROLEO BRASILEIRO S.A. - PETROBRAS, PONTIFICIA UNIVERSIDADE CATOLICA DO RIO DE JANEIRO
    Inventors: José Luiz Arias Vidal, Ricardo Munoz Freitas, Arthur Martins Barbosa Braga, Luiz Carlos Guedes Valente, Antônio Carlos Oliveira Bruno, Hélio Ricardo Carvalho
  • Publication number: 20090052831
    Abstract: Fiber optic position transducer that includes a magnetic or electromagnetic element, one or more segments of magnetostrictive material, Fiber Bragg Grating Sensors, a rod of material that is impenetrable to magnetic fields, optical fiber. One or more of the sensors is fixed upon a segment of magnetostrictive material, which is fixed to a rod, and may only be displaced longitudinally. The Fiber Bragg Grating Sensors have different wave lengths and are made of the same optical fiber. The magnetic or electromagnetic element included may be made of NdFeB (Neodymium Iron Boron) or metal alloys of TbDyFe (Terbium, Dysprosium and Iron), such as TX, Terphenol-D and others. It is applied to a control flow valve in an oil well, and it also refers to the calibration process of the position of the transducer.
    Type: Application
    Filed: June 30, 2008
    Publication date: February 26, 2009
    Applicants: PETROLEO BRASILEIRO S.A. - PETROBRAS, PONTIFICIA UNIVERSIDADE CATOLICA DO RIO DE JANEIRO
    Inventors: Jose Luiz Arias Vidal, Ricardo Munoz Freitas, Arthur Martins Barbosa Braga, Luis Carlos Guedes Valente, Antonio Carlos Oliveira Bruno, Helio Ricardo Carvalho
  • Patent number: 7342217
    Abstract: A system for the measurement and surface data acquisition for optical fiber sensors containing Bragg gratings for the sensing of physical parameters originated from a set of oil wells, the system including: an optical system for signal processing, the signals being originated from physical parameters sensors installed in one single or in a set of oil and/or gas wells and resulting from the reflected wavelength in response to a perturbation of the physical parameter under measurement; an electronic system for signal processing for converting the optical intensity signals originated from the optical system into electrical signals with the aid of detectors that optimize the signal/noise ratio; and an optical switcher having an interface between a) and b), for expanding the number of monitored oil wells.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: March 11, 2008
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Jose Luiz Arias Vidal, Manoel Feliciano da Silva Júnior, Ricardo Munoz Freitas, Lincoln Homero Thomé Ferreira
  • Patent number: 7308165
    Abstract: An optical transducer 100, 200 and method for the simultaneous measurement of downhole pressure and temperature in a single- or multi-point configuration including a body 10a/10b with an elastic membrane 50 onto which at least one Bragg grating 60a/60b is attached, and at least an additional Bragg grating 60b/60a contained on the same optical fiber 30. The elastic membrane 50 conveys strain proportional to the pressure and temperature conditions to which is submitted said transducer to at least one Bragg grating 60a/60b, the portion of light not reflected by the Bragg gratings 60a, 60b continues along the remaining of the optical fiber 30.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: December 11, 2007
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Jose Luiz Arias Vidal, Manoel Felician da Silva Júnior, Ricardo Munoz Freitas, Arthur Martins Barbosa Braga, Luiz Carlos Guedes Valente, Rogério Dias Regazzi, Alexandre Sant'Anna Ribeiro, Lincoln Homero Thomé Ferreira, Joao Luiz dos Santos Lorenzo
  • Patent number: 7266261
    Abstract: A fiber optics differential pressure transducer (100, 200, 300, 400) containing Bragg networks (118), said transducer being used to measure the differential pressure in a Venturi installed inside a pipe (1), through which a fluid like oil is displaced. The transducer comprises a body (110, 230, 360, 410) of different geometries and a diaphragm (2), at least one Bragg network (118) being attached on each of the surfaces of the same. The diaphragm (2) is placed parallel or transversal to the transducer's body (100, 200, 300, 400). The transducer (200) is isolated from the process fluid by flexible mechanical seals (201) which transmit the pressure up to surfaces of the diaphragm (2). The transducer (300, 400) is provided with two relief microvalves for the purpose of protecting the sensor [diaphragms (2)] in overpressure events.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: September 4, 2007
    Assignee: Petroleo Brasileiro S.A.-Petrobras
    Inventors: Jose Luiz Arias Vidal, Manoel Feliciano da Silva, Jr., Ricardo Munoz Freitas, Arthur Martins Barbosa Braga, Luiz Carlos Guedes Valente, Roberth Waldo Angulo Llerna