Portable VSDs, load cells aid rod pumping at Duri

A pilot project on a portable variable-speed-drive and load cell for obtaining counterbalance effect (CBE) data in the Duri steamflood improved the sucker-rod pumping efficiency from wells that had low lift efficiency caused by incomplete pump fill.The Duri steamflood on the Island of Sumatra in Indonesia is the largest in the world and currently produces about 200,000 bo/d.In the field, incomplete or low pump fill is the most common operational problem experienced especially on ramp-down wells. The low fill results from having a pump capacity that exceeds the formation’s ability to flow fluid into the well or from having excessive gas or steam at the pump intake.1Excess pumping cap...

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