Investigation of the stress-deformed state of the well jet pump elements

Abstract

The stress-deformed state of the well jet pumps is determined by their purpose and conditions of use. The main schemes for the use of ejection systems in the well are represented by the constructions of jet pumps intended for drilling, elimination of accidents in the process of drilling and operation of wells. By the nature of the impact of operating conditions on the mechanical characteristics, the components of the ejection system are grouped by the elements that are worn due to the hydraulic effect of the working environment and the body parts that perceive efforts from axial load, pressure and friction. The consumption of well jet pumps is complicated by the features of its workflow, which are the increased probability of its operation in the cavitation mode. In the process of analyzing the conditions of ex-platform of the wells of the surgery ejection systems, it is established that the annular stresses in the drilling process remain unchanged, and compression tension and tangent are observed asymmetrical hara. Unchanged stresses from the action of working fluid and axial loading and variable asymmetric stresses are characteristic of the body elements of the jet pump, which implements the process of purifying the hollow. During the elimination of the drilling column, the permanent stresses from the action of pressure and tensile at separate stages of the use of jumpers of the pump are transformed into asymmetrical extinct variable stresses. The cabinet elements of packer oil jet pumps are marked by the action of constant compression voltage, and two-pipe oil production systems are constantly stretched. Ring in the housing of the well ejection system and the density of the washing solution, the depth of the drill-wine, the flow rate of the working flow and the radius of the wall of the jet pump are associated with direct-proportional dependent. Increasing the diameter of the working nozzle and the column of lifting pipes causes a decrease in the value of the annular stress. The value of axial stresses and the radius and the thickness of the body wall are associated with a inverse pro-trial dependence.