Abstract
The choice of rational designs of pumping units for lifting fluid from a well and the modes of their operation is one of the most urgent tasks in oil production. Despite the large amount of theoretical and extreme research, the solution of the problem in this direction cannot be considered complete, given that the dynamic characteristics of the movement of the well product and the kinematics of the well pumping unit are extremely complex. This article discusses the issue of determining the dynamic forces acting at the rod suspension point, in the new constructive solution of a beamless pumping unit depending on the angle of rotation of the crank and dimensionless kinematic parameter characterizing the relationship of the length of the crank to the length of the working part of the rope and the relative eccentric. Analytical dependencies are proposed to determine the maximum load at the rods suspension point depending on inertial and vibration forces.
Highlights
In 2018, Azerbaijan produced 38 million and 758 thousand tons of crude oil, which about 80% was operated by sucker-rod pumping unit
The pumping unit is a mechanism with one degree of freedom; the law of motion of the balancer and the associated rods column is determined by the geometric and kinematic parameters of the transforming mechanism
Deaxial, crank mechanism the axis of the connecting-rod point with the balance bar does not intersect the axis of the crank shaft, but is displaced by a certain amount (E)
Summary
In 2018, Azerbaijan produced 38 million and 758 thousand tons of crude oil (including gas condensate), which about 80% was operated by sucker-rod pumping unit. Deaxial, crank mechanism the axis of the connecting-rod point with the balance bar does not intersect the axis of the crank shaft, but is displaced by a certain amount (E) Such a mechanism is characterized by the magnitude of the relative eccentricity ( ). The main functional difference is that axial and deaxial types are based on the fact that axial transforming mechanisms reflect the characteristic meaning of continuous upward and downward moving forces are observed Both schemes of mechanisms have their advantages and disadvantages; choosing one or the other type of mechanism, they strive to get the greatest benefits from the use of a rod installation in specific field conditions. Deaxial rocking machines are increasingly being introduced, which in specific field conditions may be preferable to axial
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