Ensuring the operational-technological characteristics of the new design solution of the sucker-rod pumping unit

Abstract

In Azerbaijan oil production is carried out both in the offshore and onshore. Offshore production is carried out on special platforms, while the onshore exploitation carried out directly by a mechanized method. Thus, the object of study is downhole pumps, which consist of a surface mechanical transmission and downhole equipment. For direct mechanization of ground equipment, a device called rocking machine is used, consisting of transmission and converting mechanisms. The main task of the rocking machine is to ensure the conversion of the rotational motion of the engine into the up and down stroke of the plunger of the pump. The downhole equipment includes rods column that lift liquid from the well, a cylinder and a plunger. However, the existing classic rocking machines have some advantages as well as some disadvantages. In order to overcome them, developed new design solution of the sucker-rod pumping unit, which consisting of a crank-rope-movable counterweight system has been designed. As a result of the research carried out in the article, a progressive expression was proposed for determining the strength condition of the rods column, which is one of the main working elements of the rocking machine. Then, in order to specify the wells in which the rocking machine can be applied, the statement regarding the determination of the value of the linear density of liquid column based on the strength condition of the rod column was put forward. These, in turn, can be determined in which oil wells with specific physical characteristics of the rocking machine with the given technical characteristics can be applied. All this can contribute to the prevention of accidents that may occur due to the breakage of the rods column of rocking machine. The formula proposed in this paper can be applied not only to the existing classic rocking machines, but also to other new design of rocking machines.

Evaluation of the Energy Efficiency of the New Model of Sucker-Rod Pumping Unit

“…At Figure 1 shown the overview of the new constructive solution of the sucker-rod pumping unit [12]. The new constructive solution of the sucker-rod pumping unit consist from frame (1), threephase short-circuited asynchronous motor (2), V-belt drive (3), rigidly connected two-flow threestage reducer (4), on the drive shaft of which on one side mounted double-shaped brake (5) and on the other side V-belt pulley (6), and on the driven shaft of its installed two cranks (7); guide blocks (8,9), ropes (10) connected to the rods suspension point (11).…”

“…The new constructive solution of the sucker-rod pumping unit consist from frame (1), threephase short-circuited asynchronous motor (2), V-belt drive (3), rigidly connected two-flow threestage reducer (4), on the drive shaft of which on one side mounted double-shaped brake (5) and on the other side V-belt pulley (6), and on the driven shaft of its installed two cranks (7); guide blocks (8,9), ropes (10) connected to the rods suspension point (11). The converting mechanism, which consists of two slider-crank linkage (12), converts the rotational motion of the crank into the upstroke and downstroke movement of the rod suspension point. The mechanical transmission has counterweights whose weight can be adjusted (14), located on a movable cross beam (13), which is connected with hinge joint to the connecting-rod.…”