Abstract: A portable, skid-mounted, field-powered cable spooler for oil wells is provided which is easily moved from site to site and operated under field conditions. This apparatus is primarily designed for use in winding and unwinding electric cable (such as REDA cable) for positioning submersible pumps in oil wells. The apparatus is skid-mounted to permit transportation by truck or helicopter to field location. A diesel engine, or equivalent, powers a hydraulic pump to drive a reversible hydraulic motor turning the shaft supporting the cable spool. The cable spool is mounted on spaced, open top, trunnion bearings which permits easy changing of the spools.