Patents by Inventor Paulo Cesar Lima

Paulo Cesar Lima 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: 20050178542
    Abstract: A method and apparatus for exploiting oilfields involving the installation of a well network in the form of an open or non-open ring that is generally non-circular. Horizontal well sections (3) are drilled from vertical injection (1) or producing (2) wells that already exist, to interlink them. The vertical wells that are located in the same line are used as injection wells, thereby promoting oil sweeping in the reservoir (R) towards the ring-shaped producing wells (P1) or (P2). In another embodiment, vertical service wells are drilled for monitoring the characteristics of the reservoir (R). From these wells, horizontal wells are drilled in a ring-shaped form to obtain concentric well rings from the periphery to the central region of the reservoir (R). The outermost horizontal well is used as injection well and the innermost annular horizontal wells are used as producing wells.
    Type: Application
    Filed: November 24, 2004
    Publication date: August 18, 2005
    Applicant: Petroleo Brasileiro S.A. - PETROBRAS
    Inventors: Paulo Cesar Lima, Alcino de Almeida
  • Patent number: 5389155
    Abstract: A process for use in gas pipelines, where the condensate liquid is withdrawn by passing a cylinder made out of a spongy polymeric material through the pipeline, includes propelling the cylinder by a small pressure difference between the trailing part of the cylinder and the front part of the cylinder, so that the displacement of the cylinder along the interior surfaces of the pipeline pushes the above mentioned condensate. The piston is made out of a spongy material, preferably flexible spongy polyurethane with a density lower than 40 kg per cubic meter so that the piston only suffers a maximum dimensional loss of 0.50% after traveling pipelines with a total length of more than 1000 km.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: February 14, 1995
    Assignee: Petroleo Brisileiro S.A. - Petrobras
    Inventor: Paulo Cesar Lima