Paper: Economics and Flexibility of Hydraulic Pumping Systems

The use of hydraulic pumping equipment to artificially lift producing wells is on the increase because of new equipment being developed; multiplicity of wells requiring lift; and new operating concepts. Certainly for overall acceptance the artificial lift method must be economically advantageous for the operator. Specific examples will be included to show the economics which favor hydraulic pumping. As important; and one of the factors which reflect savings in initial installation of equipment and monthly operating costs, is the extreme flexibility offered by hydraulic pumping. Installation of equipment can be staged and need be made only at the time it can be fully utilized; therefore, there is no need for expensive changes for equipment obsolescence during lift life. The flexibility is further illustrated with the centralization of battery equipment to gain more effective use of available horsepower and directing high pressure power to wells through satellite stations. This paper will also discuss closed power oil hydraulic pump systems as this method is receiving increased attention and acceptance. The cost of the additional tubing string required can, in many instances, be offset by a reduction in treating facilities. The many advantages of closed power oil systems will be outlined and current installation practices reviewed.