Patents by Inventor Marvin L. Burrows

Marvin L. Burrows 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: 5005651
    Abstract: A fluid producing well has a downhole pump assembly located at a lower end of a tubing string for producing fluid from a pay zone. Some parts of the pump are affixed to a hold-down and the hold-down is telescopingly received in sealed relationship within a seating nipple. The seating nipple is connected to the tubing string. The hold-down and the pump assembly are connected to an apparatus in the form of a telescoping sleeve assembly by which the hold-down can be pushed uphole from a location that is below the seating nipple and forced to become unseated from the seating nipple. The apparatus includes an adaptor affixed at the lower end of the hold-down that extends downhole below the seating nipple. The telescoping apparatus is connected to engage the borehole and apply an uphole force on the adaptor in response to the tubing being lowered downhole.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: April 9, 1991
    Inventor: Marvin L. Burrows