Throughout the world the most commonly used method toartificially produce wells is by sucker rod lift. Low producingefficiency caused by incomplete pump fillage is the mostcommon operational problem experienced by sucker rod liftedwells. Incomplete pump fillage is the result of having a pumpcapacity that exceeds the production rate of the well or havingpoor gas separation at the pump intake with a portion of thepump displacement being lost to gas interference. Moreefficient operations and lower cost will result, if these wellsare operated with the pump filled with liquid by eliminatingany gas interference in the pump and controlling pump runtime so the pump displacement will match the inflow of liquidfrom the reservoir into the wellbore. The operator mustmonitor well to insure that the pump has no mechanicalproblems and efficient operations are maintained as all theavailable liquid is produced from the wellbore.
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