Calculation of Parameters of Technological Equipment of Hydraulic Elevator Installation for Removing Sand Plugs from Wells

Abstract

The paper considers the technological scheme of the hydraulic elevator installation, according to which water from a pressure tank is supplied by a working pump to the well through two parallel pipelines: a hydraulic monitor with a washing nozzle for destroying a sand plug and a supply pipeline that is connected to the working nozzle of a hydraulic elevator containing suction and supply pipelines for taking slurry and cleaning single- and double-column water wells from sand plugs The methodology for calculation and selection of parameters of technological equipment of the installation is given. Based on the compiled equations of fluid motion along the supply pipeline with an active nozzle and the hydraulic monitoring pipeline with a scouring nozzle, expressions have been obtained for constructing the pressure characteristics of these pipelines. A graphic-analytical method is proposed for determining water flow rates in them by constructing the characteristics of a working pump and pipelines and finding the coordinates of the operating point. By varying the parameters of the pipelines and the characteristics of the working pump, without changing the parameters of the jet pump-hydraulic elevator, the values of the useful lifting height of the hydraulic elevator were calculated, which has made it possible to select two options for the technological equipment of the hydraulic elevator installation (for polypropylene and steel pipes) for removing sand plugs from water wells with a maximum depth of 50 and 75 m.