Paper: CARE AND MAINTENANCE OF LONG STROKE GYDRAULIC PUMPING UNITS

The long stroke hydraulic pumping unit, as we know it today, oftentimes may seem strange to the new operator, even though it has been operating successfully in parts of the oil field for the past fifteen years. Justifiably so, the hydraulic long stroke unit may at first seem unfamiliar to the new operator, since for years previous to the introduction of the long stroke hydraulic pumping unit the oil fields had know no other means of sucker rod pumping than the old familiar sight of a beam moving up and down. However, just as the rotary drilling rig has followed the cable tool rig, so has the hydraulic long stroke unit followed the beam pumping unit.