Patents by Inventor Paul Roffmann

Paul Roffmann 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).

  • System and method for power failure indication and isolation
    Patent number: 11480023
    Abstract: A system for determining a fault in a subsea blowout preventer (BOP) stack includes a first sensor and a second sensor adapted to measure one or more properties of a subsea operation. The system further includes a first power supply adapted to provide operational power to the first sensor and a second power supply adapted to provide operational power to the second sensor. The system also includes a first power failure indicator and isolator (PFII) associated with the first sensor and the first power supply, the first PFII measuring a first pair of waveforms to identify a first fault and a second PFII associated with the second sensor and the second power supply, the second PFII measuring a second pair of waveforms to identify a second fault.
    Type: Grant
    Filed: January 20, 2020
    Date of Patent: October 25, 2022
    Assignee: Baker Hughes Oilfield Operations LLC
    Inventors: Shah Sakhawat, John S. Holmes, Paul Roffmann, Jochen Schnitger
  • SYSTEM AND METHOD FOR POWER FAILURE INDICATION AND ISOLATION
    Publication number: 20210222506
    Abstract: A system for determining a fault in a subsea blowout preventer (BOP) stack includes a first sensor and a second sensor adapted to measure one or more properties of a subsea operation. The system further includes a first power supply adapted to provide operational power to the first sensor and a second power supply adapted to provide operational power to the second sensor. The system also includes a first power failure indicator and isolator (PFII) associated with the first sensor and the first power supply, the first PFII measuring a first pair of waveforms to identify a first fault and a second PFII associated with the second sensor and the second power supply, the second PFII measuring a second pair of waveforms to identify a second fault.
    Type: Application
    Filed: January 20, 2020
    Publication date: July 22, 2021
    Applicant: Baker Hughes Oilfield Operations LLC
    Inventors: Shah Sakhawat, John S. Holmes, Paul Roffmann, Jochen Schnitger