Territorija Neftegas № 12 2014
Read in this issue:
» Causes of drill pipe body destruction during the operation and advantages of drill pipes with internal protective coating
Hazardous defects in the drill pipes bodies, initiating during the drilling stem operation and causing its failures, are systemized. Mechanism of the processes, causing these defects, is analyzed. Drill pipe body consumer properties, preventing appearance or intensive development of such processes, are identified. Advantages of drill pipes with internal polymer coating are substantiated. It is demonstrated that the essential prerequisite to ensure efficiency and reliability of the drill pipes with internal polymer coating is development of methods of statement of the technical specifications to this coating in accordance with its purpose, as well as methods and technical means of control over compliance of the actual quality of the applied coatings with these requirements.
Keywords: drill pipes, corrosion, protective coatings, destruction mechanisms.
» Testing the methods of cathodic stations energy audit for protection of gas distribution systems as exemplified by Gaz Service JSC
Active protection of urban and rural gas distribution systems against electrochemical corrosion, similar to main gas pipelines, is arranged by means of cathodic protection plants (CPP) which comprise: cathodic protection stations, sacrificial anodes of various design, cathode and anode cables and the protected pipeline section with its passive protection in the form of insulation coating.
Keywords: electrochemical protection, cathodic protection plants (CPP), cathodic protection stations (CPS), power losses, energy saving, energy efficiency enhancement.
» Software implementation of process design for preparation of works performance at the main gas pipelines in a flooded area
The software implementation principles of process design for repair works in a flooded area are described. It is demonstrated that the modern approach towards installation and repair works management at the line part of main gas pipelines implies intensive use of computers and computer complexes when developing method statements taking into account consequences simulation results of the design solutions adoption. The paper considers a package of application software, which ensures automation of the method statements development process so that at any stage it is possible to draw on the expert’s experience and knowledge by means of detailed control over the procedures and modifications in the mode of iterative multioptional computations.
Keywords: main gas pipeline, software, process design, flooded area, construction and installation works, repair of the line part of main gas pipelines.
» Industrial testing of clarifiers using acoustic emission method
The article describes results of testing the clarifier vessel operated under pressure. The vessel was decommissioned seven years ago following the results of expert examination using traditional method of non-destructive testing. Method of acoustic emission is chosen for the research.
Keywords: hydraulic test, acoustic emission, pressure vessel, non-destructive testing, loading.
» Development of the technology for identification and repair of gas pipelines potentially hazardous sections by the sign of cross-section stress corrosion cracking
This article describes the main provisions of the developed technology for identification of potentially hazardous sections (PHS) liable to cross-section stress corrosion cracking (SCC), as well as for their repair without suspending gas transmission by adjusting the space position in the vertical plane (bending radius increase, deflection reduction).
Keywords: gas pipeline, cross-section stress corrosion cracking.
» Determination the most probable transmission ratios cones of the bit
It’s necessary to solve problems of preventing a tracking on a bore hole’s bottom during designing of cutting structure of the roller cone bit. Transmission ratio of cone is the main feature of the interaction between its cutting structure and a bottom. The area of changing transmission ratios of cones determined in article as the function of bit chipping away bit ability. It’s experimentally confirmed, that transmission ratios of cones assume random values on two or three levels, and substantiated method of the determination of the most probable transmission ratios of cones.
Keywords: roller cone bit, tracking, transmission ratios of cones,; chipping away bit ability.
» Improvement of the central water jet unit of the tricone drilling bit
Results of work aimed at improvement of the central water jet unit of the tricone drilling bit, are presented.
Keywords: tricone drilling bit, jet nozzle, turbulent kinetic energy.
» Statistical method for initial investments appraisal when selecting PV solar panels for a solar power plant
This paper is the continuation of researches into the theoretical bases of solar power generation performed by the Department of Thermodynamics and Heat Engines of Gubkin Russian State University of Oil and Gas in cooperation with the Royal Institute of Technology (Stockholm, Sweden) under the program «Energy Saving Technologies for Gas Transportation Systems». A modern approach to address the issue concerning appraisal of the initial investments in procured solar panels for installation at a solar photovoltaic power plant.
Keywords: initial investments, photovoltaic panel (PV), solar power plant (SPP), statistical method, specific cost of a PV-panel, PV-panel capacity, PV-panel efficiency.
Gas distribution stations and gas supply system
» Simulation modeling of flow meters operation upon failure or verification of metering devices
The main task of gas distribution networks operation is to ensure failure-free supply of natural gas to the consumers. Gas flow metering is an integral part of the process of gas distribution. The article deals with a method, allowing continuous gas flow metering in the event of failure or maintenance of the metering devices.
Keywords: flow meter, natural gas flow metering, measuring systems, gas distribution network.
» Enhancing gas distribution plant equipment operational efficiency of Gazprom Transgaz Ufa LLC within the scope of energy-saving projects implementation
Energy efficiency is currently one of the priority lines in the state economic policy of the Russian Federation. Gazprom Transgaz Ufa LLC is one of Gazprom JSC subsidiaries, which fundamentally restructured its approach towards energy saving. The article offers experience in developing the «Energy Saving and Energy Efficiency Enhancement Program of Gazprom Transgaz Ufa LLC for 2014–2016».
Keywords: gas distribution plant (GDP), energy saving, energy efficiency, efficiency, process equipment.
» Application of power turbo-expander units with output up to 5 kW as a part of process equipment of gas distribution plants
The paper deals with the modernization of the GDP power supply proposed by Gazprom Transgaz Ekaterinburg LLC with the use of TEU-2 and TEU-5 in order to bring GDP to conformity with the requirements of Gazprom STO 2-6.2-149-2007 «Categorization of power consumers of industrial facilities of Gazprom JSC and increase in GDP energy efficiency».
Keywords: turbo-expander unit (TEU), gas distribution plant (GDP), GDP power supply.
» Analysis of applicable regulatory framework in the area of gas distribution systems operation regulation and recommendations for its improvement
The article considers issues of improving the regulatory framework for gas distribution stations operation. Relevance of this paper is due to incomplete compliance of the regulatory framework of GDS operation with modern legislative and regulatory industry requirements and the level of technology and equipment. Standardization of GDS maintenance, diagnosis, repair and reconstruction processes will contribute to compliance with the requirements of technical regulations applicable to the area of Gazprom JSC activity, it will improve the reliability and safety level of GDS operation, ensure technical and informational compatibility of GDS and gas distribution systems control processes.
Keywords: analysis, regulatory framework, operation, gas distribution station, recommendations.
» Geologic structure and oil-bearing capacity of the Okskiy Superhorizon in the Dymnoye field of the Orenburg region
The article describes geologic structure and oil-bearing capacity of the Okskiy Superhorizon in the Dymnoye Field of the Orenburg Region. It reviews the facility industrial value associated with the Okskiy Superhorizon within which oil deposits are identified.
Keywords: geological structure, oil-bearing capacity, horizon, tectonics, deposit.
» Uncertainty assessment as one of the geostatistical inversion results
Firstly, some aspects of a transition to a new concept of uncertainty assessment were considered. In general, the paper is about uncertainties and their influence on the geostatistical inversion results. Some inversion parameters have a significant impact and cause great uncertainty others do not. And so it was attempted to learn which parameters of the algorithm are critical for the result and which are not. Finally, as a conclusion, we’d like to notice how necessary it is to assess the uncertainty as one of the results QC steps.
Keywords: uncertainty, uncertainty assessment, ambiguity of the solution, geostatistical inversion, seismic 3D, detailed models.
» Updating the pattern of the Upper Jurassic Deposit in the Vat-Yogan field according to the geological and hydrodynamic research data
The article describes possibilities of using hydrodynamic research data and well operation materials for reliable geological simulation of deposits complicated by faults.
Keywords: geological model, faults, oil-water contact, tracer tests, oil light absorption factor, office observation well testing, reservoir pressure.
Transport, storage and processing of oil and gas
» Theoretical background of the new gas pumping technology on the basis of the GTU exhaust gas heat recovery
The article reviews the patented new technology of gas pumping on the basis of the GTU exhaust gas heat recovery, which makes it possible to decrease the gas temperature at the process compressor inlet and energy input for gas compression. The article includes flow-chart, thermodynamic cycle, schedule of gas temperature variations at representative points in case of known and new gas pumping technologies. It proposes to evaluate the gas pumping technology efficiency through the specific fuel gas flow rate per gas supply unit. It is shown that the new gas pumping technology decreases specific fuel gas flow rate by 1.7 - 7.3%, depending on the gas compressor unit capacity.
Keywords: gas compressor unit, exhaust gas heat recovery, specific fuel gas flow rate, energy input for pumped gas compression.
» Physical processes in the welding unit during electrofusion welding
Actions of the operator prescribed for performing electrofusion welding [4, 5] and even specifics of these actions for welding unusual fittings  are conceptually clear. However, in practice the bigger part of problems occur from negligent performance of these actions by the operator. Such negligent performance is resulted from imperfect understanding of the processes taking place in main power board and logics of the welding unit during the welding process.
Keywords: electrofusion welding, electrofusion fitting, electrofusion welding unit
Fields Development and operation installation
» Arguments for non-stationary waterflooding at the Yuzhno-Vyintoiskoye field
The paper focuses on application of the non-stationary waterflooding at the Yuzhno-Vyintoiskoye field. Four-layer geological-statistical model and the results of the field development review have been shown to be more efficient and less time consuming for selecting the areas for waterflooding operations.
Keywords: non-stationary flooding, geological-statistical model of the reservoir, geological and technical actions, effect of geological and technical actions.
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