-
Date submitted2020-06-02
-
Date accepted2020-12-15
-
Date published2020-12-29
Method for calculating dynamic loads and energy consumption of a sucker rod installation with an automatic balancing system
The efficiency of sucker rod pump installations, which have become widespread in mechanized lift practice, is largely determined by the balance of the drive. During the operation of sucker rod installations, the balance of loads acting on the rod string and the drive can change significantly due to changes in the dynamic fluid level, which leads to a decrease in balance and an increase in loads on the pumping equipment units. The increase and decrease in the dynamic level in accordance with the pumping and accumulation cycle occurs in wells operating in the periodic pumping mode. It is shown that during the operation of equipment in a periodic mode, fluctuations in the dynamic level and, accordingly, in the loads acting on the nodes occur. This leads to the need for dynamic adjustment of the balancing weights to ensure the balance of the pumping unit. A system for automatic balancing of the rod drive has been developed, including a balancing counterweight, an electric motor that moves the load along the balance beam, a propeller and a computing unit. To study the effectiveness of the proposed device, a complex mathematical model of the joint operation of the reservoir - well - sucker rod pump - rod string – pumping unit has been developed. It is shown that due to the dynamic adjustment of the balance counterweight position, the automatic balancing system makes it possible to significantly reduce the amplitude value of the torque on the crank shaft (in comparison with the traditional rod installation) and provide a more uniform load of the electric motor. Equalization of torque and motor load reduces the power consumption of the unit.
-
Date submitted2009-09-20
-
Date accepted2009-11-29
-
Date published2010-06-25
Some facts of history of training and employment of mining engineers during 20-30th years of 20th century
- Authors:
- V. G. Afanasev
The article is dedicated to the problem of training mining engineers during the most difficult Soviet period. The problem was solved with foundation of new educational institution as well as reorganization of functional ones primarily Mining Institute. Reformation of universities was justified sometimes not. Disadvantage of reformation was repression to highly qualified specialists of mining. Personnel problem was solved that allowed to increase coal and oil extraction.
-
Date submitted2008-11-19
-
Date accepted2009-01-23
-
Date published2009-12-11
The legal and economic conditions of attraction investments to the exploration in Russia
- Authors:
- A. A. Fedchenko
- V. G. Beliakov
The problems of rational use of the huge mineral-resource potential of Russia are considered. The causes of insufficient exploration volumes in Russia are analyzed. It is proposed measures of the legal regulations in order to create junior geological companies in Russia and increase private investments to the exploration of deposits.
-
Date submitted2008-11-07
-
Date accepted2009-01-08
-
Date published2009-12-11
The main tasks of modern tax system development in fuel and energy complex industries
- Authors:
- E. A. Solovyova
- A. M. Zhukov
The basic principles of the existing tax structure in the sphere of entrails usage are stated in the article. Some disadvantages of tax on mineral resources extraction in respect of energy resources are pointed out. The necessity of tax rates differentiation with reference to tax on mineral resources extraction is proved in an effort to stimulate rational subsoil usage.