Rod pull down tool
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United States of America Patent
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-
Sep 19, 1995
Grant Date -
N/A
app pub date -
Feb 9, 1994
filing date -
Feb 9, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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