Patents Assigned to James L. Weber
  • Rod pull down tool
    Patent number: 5450897
    Abstract: In a well using a lift pump operated by a tension string from the surface, the down stroke of the pump is accelerated by providing a plunger element secured to the pump operating string. The plunger has an upper end exposed to the high hydrostatic pressure in the tubing string above the pump, and a lower end exposed to the substantially lower hydrostatic pressure in the well outside the tubing string. This produces a net downwards force on the pump operating string allowing a higher pump speed and a higher volume delivery.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: September 19, 1995
    Assignee: James L. Weber
    Inventor: John F. Brown