AIRLIFT Russian patent published in 2021 - IPC F04F1/18 E21B43/00 

FIELD: construction.

SUBSTANCE: invention relates to techniques for the construction, repair and operation of wellbores and other mine workings for the extraction of products from the earth's interior. The airlift contains a lifting pipeline and a pipeline for supplying the working agent to the inside of the head working body with a pair of funnels inside. The funnels are made of equal size in the form of truncated cones of thin sheet metal and are coaxially nested without touching one another with an annular slotted gap with a thickness of 2 to 8 mm. All rectilinear generatrices of the lateral surface of the body of the cones on both sides of the slotted gap are radially focused by their virtual continuation to the point of intersection at the common apex of the cone with an angle of not more than 5 °. The point is located at the epicenter of the lifting pipeline near the narrow throat of the nozzle vent, which simultaneously serves as a receiver chamber cover formed by the cylindrical body of the head working body, its cone-shaped cover and the internal suction funnel, rigidly and hermetically joined to each other at the contact points. The bell of the wide mouth of the suction funnel is hermetically docked to the bottom of the cylindrical body, and the narrow mouth of the funnel, which is inside the receiver, is brought out beyond its limits and hermetically docked end to end with the nozzle mouth. The wide base of the nozzle is hermetically and rigidly docked with the lower end of the lifting pipeline.

EFFECT: invention is aimed at creating the most versatile aerohydrodynamic means for extracting desired products from the earth's interior, exposed by drilling, as well as increasing productivity and reducing labor costs for its manufacture by simplifying the design and reducing weight.

4 cl, 3 dwg