Foot valve for pumping wells
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 11, 1988
Grant Date -
N/A
app pub date -
Aug 17, 1987
filing date -
Aug 17, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods of and apparatus for plugging a well below a rod pump to permit bleeding off the pressure thereabove so that the pump can be removed from the well for replacement or repairs and reinstalled for further pumping operations, the pump being connected to a valve mechanism in the well in a manner which permits the valve to be closed as a result of lifting the pump, this connection being releasable to permit the pump to be pulled free of the valve and withdrawn from the well after the well pressure has been bled from above the closed valve. When the pump is installed again, the pump automatically reconnects to the valve. This invention is particularly useful in wells which are stimulated by the injection of steam.
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