Patents by Inventor Carlos A. D. S. Jesus

Carlos A. D. S. Jesus 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).

  • Reduction bushings in the casing of production and injection wells
    Patent number: 4974880
    Abstract: Improvement to reduction bushings (10, 30, 30), along with particulars of the use thereof, and to systems for sealing to the casing (15, 42), that are considerably different from those so far in use. Instead of O-rings, the seal between the bushing (10, 20, 30) and the casing (15, 42) is achieved by arc-welding (16) done at the tips thereof or by threading the bushing into the top of the casing.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: December 4, 1990
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Flavio F. Eggers, Carlos A. D. S. Jesus, Ernesto T. Foronda, Alvaro A. H. Rocha