It is applied to the oil well containing corrosive medium such as salt sulfur, carbon dioxide and bacteria and the wells with fewer sands.Comparing with conventional tubing pump,The API Tubing Pump has better performance in corrosion resistance & antifriction aspects.Plunger of it is nickel plated on alloy base,inside wall of barrel is plated hard cadmium,key parts,such as valve hood,valve ball,are made of materials with excellent mechanical performance and corrosion resistant property.Compared with conventional pump,the series of pump has a longer working life. Subsurface pump Per API Spec.11AX
