CONTENTS of journal "THNP" 2•2013 (Russia)
RESEARCH OF CHEMICAL STABILITY OF PLASTIC PIPELINES AT CONTACT TO A GAS CONDENSATE
In article the experimental research is presented and quality standard of chemical stability of plastic pipelines is given at contact to a gas condensate.
KEYWORDS: gas condensate, chemical stability, polymeric pipes, polythene, polypropylene, diffusion.
TO THE APPLICATION OF TESTING TECHNOLOGY OF GAS PIPELINES BY THE «STRESS TEST» FOR BRAKING DEFECTS STRESS CORROSION (REVIEW OF FOREIGN EXPERIENCE)
The article is a summary of the published results of research of test method of gas pipelines of «stress test» for braking defects of stress corrosion.
The world experience shows that along with high-quality repair, this methodpromotes the integrity of the pipeline for the long-term safe operation. It is noted, however, that is not sufficiently explored especially «stress test» when major repairs in contrast with similar tests of a new pipeline.
KEYWORDS: technology, testing, gas pipeline, stress test, stress-corrosion, overview.
IMPROVING THE METHOD OF VALUATION OF THE METAL CRACK PIPES
Presents an advanced methodology for evaluation of fracture toughness characteristics of pipes, which allows to make calculations of residual life of pipelines of various purposes on the results of diagnostics. New models were proposed and corresponding K-calibrating function for the two-parametric radial cracks of different depth and length.
KEYWORDS: fracture toughness, hydrogen, a residual resource, embrittlement, strain aging, corrosion destruction, radial crack, co-axial crack, intensity coefficient voltage.
TO THE QUESTION ON INFLUENCE OF ANTITURBULENT ADDITIVES ON QUALITY DIESEL COMBUSTIBLE
Efficiency of application of antiturbulent additives proves to be true at swapping mineral oil on the main oil pipelines. Results of influence of antiturbulent additive Necadd-447 on the basic parameters of physical and chemical and operational properties diesel combustible are resulted. Are drawn conclusions on an opportunity of application of the given additive.
KEYWORDS: main oil pipelines, antiturbulent additives, fuel oil.
DEVELOPMENT OF AN ALGORITHM TO CALCULATE THE HYDRATE FORMATION IN A GAS PIPELINE IN PROGRAMMING LANGUAGE TURBO PASCAL7.1
An algorithm for calculating the process hydrate in the pipeline, allowing to determine the beginning and end of the condensation zone, depending on the actual temperature in the manifold, the average gas pressure in the manifold, gas moisture content, moisture content changes, the amount of methanol injected into the pipeline, the specific consumption of methanol.
KEYWORDS: hydrate formation, specific expense of methanol, moisture content, actual temperature, material type of data, range of values.
INCREASE OF EFFICIENCY OF EQUIPMENT USE IN OIL BRANCH
The article proposes production optimization by sizing the liquid injection pipe with the well characteristics and the physical and chemical properties of the pumped medium. Optimization allows for reducing pressure losses reduce the cost of electricity for production of liquid in the development of mechanized field.
KEYWORDS: energy saving, optimization of standard size of tubing string, reduction of hydraulic losses, increase of efficiency, oil branch.
MATHEMATICAL MODEL OF A PUMPING STATION WITH A VARIABLE FREQUENCY DRIVE
It present mathematical model of oil pumping station. It has main pump unit with variable frequency drive. Model considers hydromechanical parameters. Derived functional dependencies for stationary and non-stationary modes of the system.
KEYWORDS: pipeline, oil pumping station, main pump unit, centrifugal pump, electric drive.
RESEARCH OF A SPECTRUM OF HARMONIOUS MAKING OF CURRENTS AND VOLTAGES GENERATED BY THE THREE-PHASE TRANSFORMER
This article describes a spectral method for diagnosis of power transformers. In particular, the method of obtaining the data, proper handling and analysis. The article also presents charts and graphs, constructed from the experimental data.
KEYWORDS: a technical condition, power transformer, the higher harmonics, diagnostics, spectral analysis, damages.
PRODUCTION OF BY-PRODUCTS AT THE PLANTS OF LIQUEFIED NATURAL GAS (LNG) IN THE MIDDLE EAST
Gas composition directly influences gas production, treatment and transport technologies. This article proposes short description of the gas treatment processes on the Middle East plants and gives information about the usage of such by-products as sulphur, helium, heavy hydrocarbons. Description of the by-products separation processes and by-products volumes is also given. By-products utilization leads to certain logistics and organizational problems. Common facilities as one of the possible approaches for by-products handling described in this article.
KEYWORDS: LNG, Middle East, ADGAS, Qatargas, Oman LNG, Iran LNG project, preparation of the gas, composition of the gas, by-products.
WAY TO INCREASE THE PURITY OF THE DIESEL FUEL AT STORAGE
Results of the calculation of the meanses of protection diesel oil are presented in article from mechanical admixtures in theoretical interpretation and practical their use on real machine in condition of the usages.
KEYWORDS: fuel system, mechanical impurities, filter element.
ENERGY USE PRESSURE OF THE TRANSPORTED NATURAL GAS
The methods of energy utilization of gas gage pressure in the expander-generator units (EGU) with the manufacturing of two energy streams: electricity and freeze has been considered in a work. By the development of the EGU connection diagrams the characteristics of the equipment produced by the domestic industry has been taken into account. In the energy refrigerative complex there is not only the self-contained production of electric energy, but also its stand alone consumption are provided. It release the inevitable problems of self-contained sources of electric energy in the form of synchronization with the centralized network and access to them.
Efficiency of the energy refrigerative complex can be increased by the presence of heat RES compressor stations - cogeneration water from the exhaust-heat boilers of gas-compressor unit or cheap sources of heat energy - cogeneration water of heat-electric generation plant.
KEYWORDS: energy efficiency, secondary energy resources, gas-distribution station, expander-generator unit, compressor station, gas-compressor unit, exhaust-heat boiler.
RESOURCE-SAVING OF TRADITIONAL ENERGY CARRIERS AT THE EXPENSE OF RENEWABLE POWER
Analysis of the major trends in using renewable energy sources (RES) as possible solutions to preserving traditional energy sources. Survey of international achievements in the field of renewable energy. Examination of the current status of renewable energy use in Russia, including new technology in developing alternative energy sources.
KEYWORDS: energy needs, energy sources, unconventional sources of energy, renewable energy, alternative energy, energy efficiency.