Patents by Inventor Michael D. Hershberger

Michael D. Hershberger 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: 6705397
    Abstract: A method of producing gas through liquid level detection in oil or gas wells uses various types of artificial lift systems that include sub surface gas lift, beam pumps, progressive cavity pump and submersible pumps. The artificial lift systems are controlled in response to a known liquid level within the well bore to prevent the well from pumping off and damaging the artificial lift system or from reducing the liquid level in the well bore to an unnecessarily low level to thereby increase the energy required by the artificial lift system to remove the liquid from the well bore.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: March 16, 2004
    Inventor: Michael D. Hershberger
  • Publication number: 20030121656
    Abstract: A method of producing gas through liquid level detection in oil or gas wells uses various types of artificial lift systems that include sub surface gas lift, beam pumps, progressive cavity pump and submersible pumps. The artificial lift systems are controlled in response to a known liquid level within the well bore to prevent the well from pumping off and damaging the artificial lift system or from reducing the liquid level in the well bore to an unnecessarily low level to thereby increase the energy required by the artificial lift system to remove the liquid from the well bore.
    Type: Application
    Filed: December 3, 2002
    Publication date: July 3, 2003
    Inventor: Michael D. Hershberger
  • Patent number: 6516879
    Abstract: A method of producing gas through liquid level detection in oil or gas wells uses various types of artificial lift systems that include sub surface gas lift, beam pumps, progressive cavity pump and submersible pumps. The artificial lift systems are controlled in response to a known liquid level within the well bore to prevent the well from pumping off and damaging the artificial lift system or from reducing the liquid level in the well bore to an unnecessarily low level to thereby increase the energy required by the artificial lift system to remove the liquid from the well bore.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: February 11, 2003
    Inventor: Michael D. Hershberger
  • Patent number: 5826659
    Abstract: A method of producing gas through liquid level detection in oil or gas wells uses various types of artificial lift systems that include sub surface gas lift, beam pumps, progressive cavity pump and submersible pumps. The artificial lift systems are controlled in response to a known liquid level within the well bore to prevent the well from pumping off and damaging the artificial lift system or from reducing the liquid level in the well bore to an unnecessarily low level to thereby increase the energy required by the artificial lift system to remove the liquid from the well bore.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: October 27, 1998
    Inventor: Michael D. Hershberger
  • Patent number: 5634522
    Abstract: A method of producing gas through liquid level detection in oil or gas wells uses various types of artificial lift systems that include sub surface gas lift, beam pumps, progressive cavity pump and submersible pumps. The artificial lift systems are controlled in response to a known liquid level within the well bore to prevent the well from pumping off and damaging the artificial lift system or from reducing the liquid level in the well bore to an unnecessarily low level to thereby increase the energy required by the artificial lift system to remove the liquid from the well bore.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: June 3, 1997
    Inventor: Michael D. Hershberger
  • Patent number: 5488993
    Abstract: An artificial lift system and method for lifting fluids from an underground formation. The artificial lift system comprising a production tubing through which the fluid is carried from the formation to the surface and a pressure reducer, such as a venturi, fluidly connected to the production tubing to artificially raise the level of the fluid in the production tubing. The method comprises reducing the pressure in the production tubing at an upper portion thereof to increase the pressure differential between the upper portion of the production tubing and a lower portion of the production tubing to increase the level of liquid in the production tubing for subsequent removal in an artificial lifting step.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: February 6, 1996
    Inventor: Michael D. Hershberger