Patents by Inventor Vitold Serafin

Vitold Serafin 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).

  • Patent number: 6244642
    Abstract: A retrievable bridge plug having an internal bypass passage and external retrieving lugs, and a retrieving tool therefor. When the bypass passage is sealed, both the top and bottom openings of the bypass passage are closed, preventing debris from entering the bypass passage through either opening. A directing shroud is provided adjacent the top opening of the bypass passage, such that when the bypass passage is opened, part of any fluid flowing uphole through the bypass passage is directed over the retrieving lugs, clearing them of any debris and facilitating latching by the retrieving tool. The shroud also prevents debris from packing around the top opening of the bypass passage. A retrieving tool is also provided, which retrieving tool, through cooperation of a sleeve having a “J” shaped slot, and an inner latch sleeve having a straight slot, locks the retrieving tool onto the retrieving lugs.
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: June 12, 2001
    Assignee: Polar Completions Engineering Inc.
    Inventors: Vitold Serafin, Barry Tate, Piro Shkurti
  • Patent number: 6220348
    Abstract: A retrievable bridge plug having an internal bypass passage and external retrieving lugs, and a retrieving tool therefor. When the bypass passage is sealed, both the top and bottom openings of the bypass passage are closed, preventing debris from entering the bypass passage through either opening. A directing shroud is provided adjacent the top opening of the bypass passage, such that when the bypass passage is opened, part of any fluid flowing uphole through the bypass passage is directed over the retrieving lugs, clearing them of any debris and facilitating latching by the retrieving tool. The shroud also prevents debris from packing around the top opening of the bypass passage. A retrieving tool is also provided, which retrieving tool, through cooperation of a sleeve having a “J” shaped slot, and an inner latch sleeve having a straight slot, locks the retrieving tool onto the retrieving lugs.
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: April 24, 2001
    Assignee: Polar Completions Engineering Inc.
    Inventors: Vitold Serafin, Barry Tate, Piro Shkurti