Iuri Appolonievich Sazonov ¹, Mikhail Albertovich Mokhov ¹, Khoren Arturovich Tumanyan ²

Affiliations
1 Gubkin Russian State University of Oil and Gas,Russia
2 Oil and Gas Research Institute of the Russian Academy of Sciences

Abstract

Background/Objectives: In the process of oil and gas production a considerable part of reservoir energy is lost. This problem can be solved by applying special turbines that operate with reservoir energy. Methods: The calculations and testing of the micromodels showed that the turbine vane can be designed as a permeable mesh. The uniqueness of the considered energy recovery method is represented by the application of a special turbine where the main flow of gas and liquids can move through the vane directly. The analytical and experimental methods of the investigations aim to study the process of gas and liquid movement through the permeable obstacle and thus reveal new opportunities for creating efficient and low-noise machines. Findings: Based on the results of the undertaken design activities an experimental prototype of the new hydraulic machine has been developed that is supposed to utilize the reservoir energy generated in the course of gas and oil extraction. The novelty of the developed technical solutions has been certified by the patents. Bench tests of the developed hydraulic machine equipped with a special turbine made it possible to confirm the new principles of the turbine operation control. It has been demonstrated that the force effects of the flow of gas (or liquid) on the permeable obstacle and on the turbine rotor can be controlled applying the operational principles of vortex diodes and vortex amplifier. The results of the investigations show that if the rotation of the permeable wall is taken into account it becomes possible to develop a new class of the unique hydraulic machines, including low-noise turbines, pumps and compressors. The results of the undertaken scientific and design studies are supposed to be used for developing efficient separation equipment and power generation turbines. Applications/Improvements: The developed equipment is supposed to be applied for oil and gas extraction in the offshore fields and also for other purposes due to their low weight and compact dimensions.

Keywords

Hydrocarbon Deposit, Reservoir Energy, Technical Solution, Testing, Turbine.

Full Text

   

Mikhail Albertovich Mokhov ¹, Iuri Appolonievich Sazonov ¹

Affiliations
1 Gubkin Russian State University of Oil and Gas (National Research University),Russia

Abstract

Background: The relevance of the study is determined by the search for new1 ways to generate energy without burning hydrocarbons. The article is aimed at revealing opportunities for additional energy during gas expansion. Method: The main methods for studying this problem are the analytical and experimental methods that allow considering comprehensively the issues of compressed gas energy conversion into thermal energy. Experimental turbine prototypes with loop blades are used for the bench studies. Uniqueness of the problem under consideration lies in the fact that the gas flow penetrating into the inner cavity of the turbine impeller repeatedly interacts with the impeller blades. Findings: The article presents a developed and patented turbine design, demonstration micro-models with electro-mechanical transmission options, discloses the possibilities of the turbine impeller weight reduction, identified new opportunities to address the issue of the rotor balancing, and confirmed experimentally the performance of the created turbine. It also describes the trends in research and development related to the use of loop blades. Improvements: The research results are of practical interest for the development of energy-saving technologies in oil and gas production, especially in the offshore fields and can be used for solving power engineering and robotics tasks.

Keywords

Energy Conversion, Gas, Generator, Loop Blade, Oil, Turbine.

Full Text

   

Mikhail Albertovich Mokhov ¹, Yuri Appolonievich Sazonov ¹

Affiliations
1 Gubkin Russian State University of Oil and Gas (National Research University), RU

Abstract

Background/Objectives: When developing oil and gas fields one of the most pressing problems is to reduce energy costs. Arranging more efficient use of compressed gas energy helps solve this problem. Methods: The compressed gas energy can be converted into thermal or electrical energyby using a special heat generator. The energy conversion usually involves several stages one of which provides for the conversion of gas flow kinetic energy into mechanical energy. At this stage of energy conversions, a gas turbine is used. Transmission is intended to transfer mechanical energy providing compliance with environmental regulations on prevention of gas emission. Findings: A sealed system for transferring mechanical energy can be developed by using a magnetic coupling based on permanent magnets and equipped with a sealed separating baffle.Each of two coupling halves is usually equipped with permanent magnets. As part of the undertaken works, a new design of magnetic coupling is considered in which only one coupling half is equipped with permanent magnets. The second coupling half is equipped with steel rollers serving as a magnetic circuit. In the system where compressed gas energy is converted into thermal energy, the steel rollers operate under elevated temperature, while the permanent magnets work in the area with lower temperature. The engineering task is to provide more favourable conditions for the operation of permanent magnets which will positively affect the reliability of the entire technical system. Applications/Improvements:The main application areas of the developed sealed system are associated with oil and gas production. However, the developed engineering solutions can be used to design other environmentally friendly equipment

Keywords

Energy Conversion, Gas, Mechanical Energy,Oil, Sealed System, Turbine.

Full Text

   

Iuri Appolonievich Sazonov ¹, Mikhail Albertovich Mokhov ¹

Affiliations
1 Gubkin Russian State Oil and Gas University, Moscow, RU

Abstract

Background/Objectives: The objective of this research is developing a new hydraulic machine for effective use of reservoir energy in offshore production. The research procedure also implies development and testing of hydraulic machine micromodels. Methods: Analytical and experimental research methods that are used aim at discovering the process of fluid flow through a permeable barrier. The uniqueness of the considered method of energy conversion is the use of a turbine, where main fluid flow is acceptable through a blade. The blade itself may be in the form of a permeable mesh that is fixed onto a hydraulic machine rotor. Findings: Research and design results proved the possibility of developing a new hydraulic machine that is meant for effective use of reservoir energy in gas and oil production. The innovation of the developed technical solutions was certified by patents. A power action of a fluid flow on a permeable barrier is usually studied in relation to thermodynamic and aerodynamic processes with a straightforward flow. This research, unlike any other known studies, deals with a shift from a straight motion to rotative motion. According to the outcomes and with regard to the rotative motion of a permeable wall, one can develop a new class of hydraulic machines having unique properties. A drastic reduction in rotor mass is achieved here, which allows developing compact turbines, pumps, compressors and dynamic separators. Simple structure and cost effectiveness of such machines make them attractive for solving production tasks in offshore gas and oil fields. Application/Improvements: Primary application of the developed machinery includes offshore gas and oil productions. We plan to use our research and design results for developing new machines and technologies.

Keywords

Hydraulic Machine, Oil Production, Reservoir Energy, Turbine, Turbine Cascade, Technical Solution.

Full Text