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United States of America Patent
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Issued Date -
Dec 30, 2010
app pub date -
Jun 29, 2009
filing date -
Jun 29, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A pumping apparatus including a pump housing, a plunger operatively coupled to a terminal end of a production string and configured to move upward and downward within the pump housing, a surface pumping unit operatively connected to an upper end of the production string, and at least one element of incremental resistance disposed on an inner surface of the pump housing or an outer surface of the plunger proximate an upper or lower limit of a pump stroke is disclosed. A method for pumping fluid from a wellbore using a pumping system having an element of incremental resistance disposed near at least one of an upper end of a pump stroke and a lower end of a pump stroke to increase the axial load is also disclosed.
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