The utility model discloses a hollow
sucker rod thermal washing
check valve for an
oil field, which comprises an
upper joint, a lower working
barrel and a thermal washing liquid
nozzle, the thermal washing liquid
nozzle is arranged above a partition table in the lower working
barrel, and a thrust spring and a
plunger are also arranged in an inner cavity above the partition table; the
upper joint is connected with a lower working
barrel provided with a thrust spring and a
plunger; before hot washing liquid enters the hot washing
check valve, the
plunger seals the hot washing liquid
nozzle. The utility model can be applied to a low-pressure and low-yield
oil well, effectively improves the paraffin
precipitation problem, and has the advantages of reasonable design, simple structure and no
welding piece. The elastic force of the thrust spring and the plunger are used for blocking the hot washing liquid nozzle, and oil in an oil
pipe is prevented from entering the hollow rod column in the well descending process of the device. The hot washing efficiency and the hot washing effect are effectively improved, the daily maintenance
workload of
oil well paraffin removal is reduced, paraffin
precipitation and production accidents caused by paraffin
precipitation are prevented, the production cost can be effectively reduced, and
economic benefits are improved.