accordingly , an improved pumping system is herein disclosed . in one embodiment , the pumping system includes a subsurface pump , a tubing string , and a surface pumping unit . the subsurface pump is anchored downhole and driven by repeated upward and downward motion of the tubing string . the subsurface pump pumps fluids to the surface via the tubing string . the upward and downward motion of the tubing string is imparted by any suitable surface pumping unit such as , e . g . a beam pumping unit or a hydraulic pumping unit . this pumping system advantageously provides - for a minimal number of strings downhole , requiring at most only casing and the production tubing . accordingly , the well may be drilled using a very slender hole , thereby allowing for sharply reduced drilling and production costs .