Patents by Inventor Patrick S. Swihart, Sr.

Patrick S. Swihart, Sr. 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).

  • Subsurface flow control apparatus and method
    Patent number: 4036297
    Abstract: A subsurface control which can be installed and retrieved from the interior of a borehole by a wireline. The apparatus is preferably located at the bottom of the borehole and controls the flow of well fluids by a pulse flow-type operation which shuts in the well prior to reaching the critical flow rate, and re-establishes flow after sufficient pressure buildup in the borehole and formation. The apparatus more efficiently utilizes well energy in lifting liquid to the surface of the ground, and includes apparatus which cyclically flows the well in response to flow rate and bottomhole pressure. In one embodiment of the invention, the apparatus is used in combination with a free traveling plunger.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: July 19, 1977
    Inventor: Patrick S. Swihart, Sr.
  • Subsurface flow control apparatus
    Patent number: 3968839
    Abstract: A subsurface control which can be installed and retrieved from the interior of a borehole by a wireline. The apparatus is preferably located at the bottom of the borehole and controls production by a pulse flow type operation which shuts in the well prior to reaching the critical flow rate. The apparatus more efficiently utilizes well energy in lifting liquid to the surface of the ground, and includes means therein which cyclically operates in response to flow rate and bottomhole pressure. In one embodiment of the invention, the apparatus is used in combination with a free traveling plunger.
    Type: Grant
    Filed: March 21, 1975
    Date of Patent: July 13, 1976
    Inventor: Patrick S. Swihart, Sr.