LOAD REDUCTION DEVICE FOR DEEP WELL PUMPING SYSTEMS AND PUMPING SYSTEM COMPRISING SAID DEVICE
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United States of America Patent
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Jul 27, 2017
app pub date -
Jul 6, 2015
filing date -
Jul 15, 2014
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Abstract
A load reduction device (10) for a deep well (1) pumping system, which is driven by a sucker rod string (6) with reciprocating motion and drives a subsurface pump (4); and a deep well (1) pumping system including the load reduction device (10). Where the load reduction device (10) has a reduction ratio which defines how much are reduced the loads acting on the sucker rod string (6); and includes a speed reducer (13) of which several preferred embodiments are described.
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