FUEL-ECONOMIZING LEAKPROOF FLUSH WELL BOTTOM VALVE

The utility model relates to a fuel-economizing leakproof flush well bottom valve which is used for washing paraffin removal in the pumping oil well of an oil field, being the improvement of an in-underground tool. The utility model comprises a pump valve switch and a communicating hole channel. When the paraffin removal is washed in a hot mode in the oil well, the reactive power loss of flush fluid is reduced, and the more half of the oil quantity which is used for washing the oil well is saved with the actions of the unidirectional flow of the pump valve switch and the different pressure of the inner and the outer of a pipe column. The effects of washing the oil well and the paraffin removal are enhanced, and the leakage of strata is effectively prevented. The utility model is especially suitable for testing the liquid level and the well killing job in the well in a low voltage, low producing, high paraffin content and serious leakage state.