Results of Bench Tests of Tube Steels of the Production Tubing with a Chromium Content of 1%, 3% and 5% on a Unit Simulating the Operating Conditions of Producing Wells

2021 ◽  
Author(s):  
Yuliya Popkova ◽  
Pavel Petrikevich ◽  
Evgenij Kaeshko ◽  
Aleksandr Ksenzov ◽  
Azer Gasanov ◽  
...  
Keyword(s):  
Average Rate ◽  
Corrosion Damage ◽  
High Water ◽  
Operating Conditions ◽  
Production Association ◽  
Local Corrosion ◽  
Well Production ◽  
Stage Of Development ◽  
Production Wells ◽  
Production Tubing

Abstract Currently, most of the fields of RUE Production Association Belorusneft are at a late stage of development, which is characterized by a high water cut of well production. One of the main tasks in such conditions is the search for engineering solutions aimed at preventing corrosion of well equipment during oil production. Under the operating conditions of producing wells of the fields of RUE Production Association Belorusneft, well equipment is subject to electrochemical carbon dioxide corrosion [1]; mainly the inner surface of the tubing is subject to corrosion attack. The average rate of local corrosion in the corrosive environments of the oil fields of Belarus is 2–3 mm/a. The first cases of corrosion damage to production tubing were identified in 2010. Taking into account the high cost of stainless tubing, since 2011, the technology of inhibitory corrosion protection has been successfully implemented in the fields of Belarus by the method of constant dosing of the reagent into the annulus of production wells. The use of inhibitors made it possible to eliminate well failures due to tubing leakage, extend their service life by at least 4 times and reduce the local corrosion rate to 0.1 mm/a. However, an increase in the number of production wells damaged by corrosion caused by water encroachment of the wells, as well as an increase in the cost of reagents for oilfield chemicals require the use of new technological approaches, the search for alternative, economically more profitable solutions.

MAIN CAUSES OF STOPPING GAS WELLS AT THE FINAL STAGE OF DEVELOPMENT OF DEPOSITS

2017 ◽  
pp. 85-89 ◽  
Author(s):  
E. V. Panikarovskii ◽  
V. V. Panikarovskii
Keyword(s):  
Liquid Flow ◽  
Liquid Flow Rate ◽  
Formation Water ◽  
Gas Wells ◽  
Well Production ◽  
Stage Of Development ◽  
Production Wells ◽  
Fluid Production ◽  
Gas Liquid Flow ◽  
Production Tubing

The analysis of well operation at the Yamburgskoye field was carried out. It has been established that the number of self-kill wells depends on the velocity of the gas-liquid flow in the well production tubing. However, in most production wells, the gas-liquid flow rate was below the minimum for fluid production from the wellbore. One of the effective methods to combat self-kill of wells is processing well bottom-holes with compositions of solid and liquid surfactants. The developed surfactant compositions make it possible to remove a condensation liquid with an admixture of formation water from wells, without adversely affecting the gas gathering network and the booster complex.

Integrity Assessment of Spherical Pressure Components With Local Corrosion and Hot Spots

2006 ◽  
Author(s):  
Pattaramon Tantichattanont ◽  
Seshu Adluri ◽  
Rangaswamy Seshadri
Keyword(s):  
Lower Bound ◽  
Hot Spots ◽  
Structural Integrity ◽  
Hot Spot ◽  
Corrosion Damage ◽  
Pressure Vessels ◽  
Operating Conditions ◽  
Local Corrosion ◽  
Integrity Assessment ◽  
Spherical Pressure

Corrosion damage and hot spots are typical of damages that can occur in ageing pressure vessels and pipelines used in industrial processes. Internal and external corrosion could be the result of corrosive products stored inside or harsh environmental conditions on the outside. Hot spots are caused by damage due to loss of refractory lining on the inside wall of pressure components or due to maldistribution of flow containing catalyst and reactive fluids. The structural integrity of such ageing components needs to be evaluated periodically to establish the continued suitability of the vessels under operating conditions. The present paper develops a method for Level 2 (as categorized by API 579) structural integrity evaluations of spherical pressure vessels containing local corrosion damage or hot spot. The decay lengths for spherical shells subject to local damages have been studied based on stretching and bending effects using elastic shell theories so as to identify the reference volume participating in plastic action. A limit for “local” corroded spot or hot spot is defined by the size of damage that an onset of pure membrane action occurs inside the damaged area. The size of damage indicating the crossover from dominance of stretching effects on the damage behavior to that of bending effects is also presented. The lower bound recommended “remaining strength factors” for spherical pressure vessels containing corrosion or hot spot are formulated by application of Mura’s integral mean of yield criterion and the improved lower bound mα-multiplier. Three alternative recommendations are proposed. The effectiveness of the proposed methods is evaluated and demonstrated through illustrative examples and comparison with inelastic finite element analyses.

scholarly journals New information about the mechanism of oil displacement from productive reservoirs using flow control technologies

2020 ◽  
Vol 177 ◽  
pp. 01012
Author(s):  
Rustam Mukhametshin ◽  
Gulnara Kvon
Keyword(s):  
Oil Recovery ◽  
Experimental Studies ◽  
High Water ◽  
High Viscosity ◽  
Oil Displacement ◽  
Low Viscosity ◽  
Stage Of Development ◽  
Wide Range ◽  
Production Wells ◽  
Control Technologies

The article is devoted to improving the efficiency of methods application to increase oil recovery of deposits that are at the final stage of development. This stage is characterized by a high degree of waterlogging of reservoirs and extracted products. From a wide range of chemical methods for increasing oil recovery in Russian oil deposits, flow-regulating (flow-deflecting) technologies have become widespread. The article analyzes the results of purposeful use of thickened water for the completion of reserves of already flooded sandstone layers. Experimental studies were performed on two specially created five-point elements in the experimental sections of the Romashkinskoye deposit. To monitor the process of low-viscosity and high-viscosity oil displacement the following methods were used: a) intake, monitoring and production wells, in which the interval of productive horizons are lined with fiberglass pipes; b) method of high-frequency resistivity (technology of "VNIIneftepromgeophysics" Institute). The studies performed in the monitoring mode showed that, along with the increase in reservoir coverage by flooding at the macro level, there is also a displacement of part of the capillary-trapped oil in the already flooded layers’ intervals, that is, at the level of micro-uniformity of the porous medium. The paper concludes on the effectiveness of using flow-regulating technologies in conditions of high water availability of development objects.

About time lag and some morphometric characteristics of streams of the forest zone

2016 ◽  
Author(s):  
Н.А. Белоногова ◽  
А.Ю. Виноградов ◽  
Т.А. Виноградова ◽  
Д.А. Догановский ◽  
А.Н. Кондратьев ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Average Rate ◽  
Time Lag ◽  
High Water ◽  
Spatial And Temporal Variability ◽  
Forest Zone ◽  
Average Flow Velocity ◽  
Small Watersheds ◽  
Maximum Water ◽  
General Movement

Расчет максимальных расходов воды дождевых паводков на малых водосборах, в целях эффективного проектирования лесохозяйственных инженерных дорожных сооружений, представляет собой весьма сложную задачу вследствие отсутствия достаточных наблюдений за характеристиками дождевого стока. Кроме того, характеристики дождевого стока и определяющие их факторы обладают большой пространственной и временной изменчивостью, что еще больше затрудняет их определение. Рекомендуемая действующими нормативами методика определения максимального дождевого стока, как показывает практический опыт, нуждается в незамедлительном редактировании с точки зрения сопоставления размерностей и правильности ссылок. Особое внимание в статье уделено определению времени добегания, включенного в расчетные формулы в качестве определяющего параметра. В настоящее время понятие «время добегания» однозначно не определено. В связи с тем, что наполненность русел рек имеет высокую пространственную и временную неоднородность и изменчивость, общее движение воды в створе проектируемого инженерного сооружения можно представить достаточно упорядоченным и единообразным, с практически постоянной паводковой средней скоростью. На основе натурных наблюдений известно, что во время паводка средняя по сечению скорость потока сохраняется постоянной в пределах верхней десятипроцентной части амплитуды уровней воды. Такие данные с конца 70-х годов не публикуются. Обработка имеющихся данных говорит о том, что существует незначительное увеличение скоростей течения с ростом площади бассейнов. Поэтому предлагается принять время добегания τi, определенное по характерным отрезкам руслового пути от исследуемого створа до истока с помощью интерполяции измеренных на гидрометрических постах данных по скоростям течения. The calculation of the maximum water flow during the high water, especially on small watersheds, in order to effectively design engineering of road structures, is a very difficult task due to the lack of sufficient observations. In addition, the characteristics of rainfall, and their determinants have a high spatial and temporal variability, which further complicates their definition. Currently recommended method of determining the characteristics of the maximum rainwater, as the experience, needs immediate clarification of dimensions and verify links. Particular attention is paid to the calculation of lag time, included in the formulas as the defining parameter. Fullness riverbeds has high spatial and temporal heterogeneity and variability. The general movement of water in the closing alignment ordered and uniform. The average rate of slightly increased or decreased depending on the dryness of the season. Each cross-section corresponds to the value of average flow velocity. These data are from the late 70-ies are not published. Processing of existing data suggests that there is a slight increase in the flow velocity with increasing basin areas. Therefore, as a constant time lag is invited to take the time determined by the characteristic segments of the channel path from the source to the alignment of the test.

Local corrosion damage of aluminum alloys

1984 ◽  
Vol 19 (5) ◽  
pp. 422-426 ◽  
Author(s):  
O. D. Smiyan ◽  
M. V. Koval' ◽  
R. K. Melekhov ◽  
N. L. Korobanova ◽  
A. M. Krutsan ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Corrosion Damage ◽  
Local Corrosion

scholarly journals Optimization and Modeling of an Emulsion Polymerization Reactor

2021 ◽  
Author(s):  
Narges Ghadi
Keyword(s):  
Emulsion Polymerization ◽  
Water Solubility ◽  
Monomer Conversion ◽  
High Water ◽  
Oscillatory Behavior ◽  
Operating Conditions ◽  
Polymer Properties ◽  
Continuous Polymerization ◽  
Simulation Results ◽  
The Impact

A mathematical model was developed to simulate emulsion polymerization in batch, semi-batch and continuous reactors for monomers with high water solubility and significant desorption such as vinyl acetate. The effects of operating conditions such as initiator and emulsifier concentration as well as reactor temperature have been studied. The simulation results revealed the sensitivity of polymer properties and monomer conversion to variation of these operating conditions. Furthermore, the impact of monomer soluble impurities on reduction of monomer conversion has been investigated. In order to control polymer molecular weight, application of chain transfer agents such as t-nonyl mercaptan was suggested. Generally, the simulation results fitted well [with] experimental data from the literature. Several optimizing policies were considered to enhance the reaction operation for better product quality. During continuous polymerization, the reactor demonstrates oscillatory behavior throughout the operation. A new reactor train configuration was consistent with the aim of damping the oscillations and producing high-quality latex.

scholarly journals Coordinating activity of independent legal entities: issues of law enforcement in conditions of economy digitalization

2019 ◽  
pp. 60-67
Author(s):  
Yu. Yu. Borisova ◽  
I. V. Akimova
Keyword(s):  
Law Enforcement ◽  
Economic Activity ◽  
Legal Regulation ◽  
Point Of View ◽  
Operating Conditions ◽  
Negative Effects ◽  
Judicial Practice ◽  
Stage Of Development ◽  
Legislative Changes ◽  
The Coordinator

In article authors investigate questions of the operating legal regulation of coordination of economic activity of independent economic entities, including questions of its legisla- tive definition and signs. Article contains the detailed analysis of the most interesting examples of judicial practice and practice of antimonopoly authorities on the matter. Authors, analyzing the current legal regulation, also give an assessment to the planned changes in the legislation in this part and state the point of view about dependence of legal assessment of actions of the coordinator and the economic entities coordinated by it on operating conditions of commodity markets on which it is carried out. As a result of a research authors drew a conclusion on need of legislative changes in a part of admis- sibility of the forbidden coordination provided that the advantage for consumers of such coordination exceeds negative effects for the competition.A significant amount of works of the modern scientists and experts investigating a per- spective of institutes of the antitrust law is devoted to questions of legal qualification of coordination of economic activity of independent economic entities in legal scientific literature.The matter was also raised in publications and authors of the "Rossiyskoye Konkurent- noye Pravo I Ekonomika" magazine, at the same time, it should be noted that to consid- eration of questions of coordination of activity smaller attention is paid, than, for ex- ample, to questions of cartels.Thus, degree of scientific readiness of the matter in general is rather high, at the same time to authors the relevance of this subject and need of the analysis and assessment of the operating regulation taking into account economic features of the present stage of development of the markets seems to be of high interest.

Implementation of Instrumentalised Virtual Multiphase Flow Metering Technology in the Wells of the Vostochno-Makarovskoye Gas Condensate Field

2020 ◽  
Author(s):  
Andrey Zozulya ◽  
Vladimir Baranov ◽  
Mikhail Miletski ◽  
Konstantin Rymarenko ◽  
Marat Nukhaev ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Liquid Hydrocarbon ◽  
Operating Conditions ◽  
Gas Condensate ◽  
Flow Measurements ◽  
Hydrocarbon Production ◽  
Flow Meters ◽  
Well Production ◽  
Track Record ◽  
Flow Metering

Summary Liquid hydrocarbon quantity optimization is among key technological indicators in the gas condensate fields development. To achieve it one needs to select and maintain optimal well-operating conditions. In this case, multiphase flow measurements are prioritized as an important optimization tool. The article presents a proven record of implementing the technology of instrumentalised virtual multiphase flow metering in the wells of the Vostochno-Makarovskoye gas condensate field to increase the efficiency of liquid hydrocarbon production. Virtual flow metering technologies that use modeling methods and adapt models to actual well-operating parameters aiming at determining well production rates are becoming increasingly popular. At that, the quality of the data at the model input does not often guarantee a qualitative determination of multiphase flow parameters. This article presents a track record of building a virtual multiphase flow meter based on single-phase streamer flow meters mounted on gas wells. Venturi flow meters were used. A series of well tests were conducted in various modes. To configure the streamer model, additional tuning studies were conducted on the separator. While testing the wells, the results of constructing a streamer model were verified by nodal analysis.

Hypermedia Programs for Mechanical Engineering

1994 ◽  
Author(s):  
Timothy K. Hight ◽  
Lee E. Hornberger ◽  
Elizabeth Lawrence ◽  
Matthew W. Gawlowski
Keyword(s):  
Engineering Students ◽  
New Technology ◽  
Technical Information ◽  
Operating Conditions ◽  
Machine Design ◽  
Standard Type ◽  
Stage Of Development ◽  
The Subject ◽  
Information Transmittal ◽  
Accessible Form

Abstract Engineers need to absorb and learn large amounts of new technical information. Effective methods of receiving this information are needed. Hypermedia stacks are one emerging avenue for information transmittal. This paper discusses two programs that have been created to address two distinct requirements for information transmittal — description of new technology in an easily accessible form, and guiding novices in developing skills and gaining insights in solving a particular type of problem. The first program was developed using a HyperCard stack and a Macintosh computer and describes current techniques available for rapid prototyping. Professional engineers and engineering students are largely unaware of these technologies because information on the subject is new. The second program is being developed using ToolBook under Windows and deals with the problem of sizing an idler shaft under given loads and operating conditions. This is a standard type of problem that might be given in a junior level machine design course. It draws on knowledge from statics and strength of materials and so acts as a review of fundamentals as well as a test of deeper understanding. This second program is at an earlier stage of development.

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