Patents Assigned to Production Service & Equipment Incorporated
  • Standing valve assembly
    Patent number: 3970145
    Abstract: A standing valve for use in a tubing string, the standing valve having a bored mandrel, a packing element with the lower end thereof sealingly connected around the mandrel, a bored valve body slidably retained on the upper end of the mandrel so as to be slidable in one direction to wedge the upper end of the packing element into sealing arrangement with the tubing string, and a valve slidably retained in the valve body to open and close the bore therethrough.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: July 20, 1976
    Assignee: Production Service & Equipment Incorporated
    Inventor: Gerald K. Boyd