Two Types of Dual Artificial Lift Systems
W.C. Smith, Cities Service Petroleum Company
Two leases in a field in the Permian Basin contain dual wells that are being artificially lifted by different systems. The wells being lifted are dual completed wells producing from the Ellenburger and Fusselman formations at 8000 feet. Some of the wells on each lease are pumper with tandem rod pumps lifting both zones from 8000 feet. These wells are equipped with a tapered string of 2-7/8 in. O.D. and 2-3/8" O.D. tubing and a string of 1.315-in. O.D. tubing installed in 5-1/2 in. casing. The remaining wells on each lease are pumped with tandem, free type hydraulic pumps installed at 8000 feet. These installations utilize one string of 2-3/8 in. O.D. tubing and two strings of 1.315-in O.D. tubing installed in 5-1/2 in. casing. This paper will briefly describe these installations and present their operating characteristics and costs.