The invention discloses a lubricator used for a reciprocating
plunger pump and a use method of the lubricator and belongs to the technical field of
oil field water injection machines. The lubricator comprises a lubricating
oil tank, a lubricating oil control valve, a balance
pipe and a water dropper installed above a
plunger of the
plunger pump. The lubricating
oil tank communicates with the balance
pipe. At least one bend is evenly distributed on the balance
pipe in the axis direction of the balance pipe. One end of each bend is connected with one end of a diversion adjusting valve, and the other end of each diversion adjusting valve is connected with a liquid dropping
nozzle. The lubricator further comprises an inflow water pipeline communicating with a
water source and an inflow water control valve. The incoming water pipeline communicates with the balance pipe through a connecting hose. By means of the lubricator used for the reciprocating
plunger pump and the use method of the lubricator, the incoming water pipeline communicating with the
water source and the incoming water control valve are newly additionally arranged so that the lubricator can be used for controlling dropping of lubricating oil and water into the plunger of the
plunger pump in sequence, the plunger is lubricated through the lubricating oil which is not completely emulsified, the use amount of the lubricating
oil can be reduced, the lubricating cost is reduced, meanwhile, the lubricating oil adsorbed to the interior of a packing can be fully utilized, and the
utilization rate of the lubricating oil is increased.