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Investigation of gas gathering pipelines operation efficiency and selection of improvement methods

Volovetskyi V. B., Doroshenko Ya. V., Kogut G. M., Dzhus A. P., Rybitskyi I. V., Doroshenko J. I., Shchyrba O. M.

Journal of Achievements in Materials and Manufacturing Engineering

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2021

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Vol. 107, nr 2

59--74

EN

Purpose: The article implies theoretical and experimental studies of the liquid pollution accumulations impact on the efficiency of gathering gas pipelines operation at the Yuliivskyi oil and gas condensate production facility (OGCPF). Research of efficiency of gas pipelines cleaning by various methods. Design/methodology/approach: The research methodology consists of determining the hydraulic efficiency of gathering gas pipelines before and after cleaning of their internal cavity by different methods and comparing the obtained results, which allows to objectively evaluate the efficiency of any cleaning method. CFD simulation of gas-dynamic processes in low sections of gas pipelines with liquid contaminants. Findings: Experimental studies of cleaning efficiency in the inner cavity of the gas gathering pipelines of the Yuliivskyi OGCPF by various methods, including: supply of surfactant solution, creating a high-speed gas flow, use of foam pistons were performed. It was established that cleaning the inner cavity of gas gathering pipelines by supplying a surfactant solution leads to an increase in the coefficient of hydraulic efficiency by 2%-4.5%, creating a high-speed gas flow by 4%-7%, and under certain conditions by 8%-10 % and more. However, for two gas pipelines the use of foam pistons allowed to increase the coefficient of hydraulic efficiency from 5.7 % to 10.5 % with a multiplicity of foam from 50 to 90. be recommended for other deposits.The results of CFD simulation showed that the accumulation of liquid contaminants in the lowered sections of gas pipelines affects gas-dynamic processes and leads to pressure losses above the values provided by the technological regime. With the increase in liquid contaminants volume the pressure losses occur. Moreover, with a small amount of contamination (up to 0.006 m3), liquid contaminants do not have a significant effect on pressure loss. If the contaminants volume in the lowered section of the pipeline is greater than the specified value, the pressure loss increases by parabolic dependence. The increase in mass flow leads to an increase in the value of pressure loss at the site of liquid contamination. Moreover, the greater the mass flow, the greater the impact of its changes on the pressure loss. The CFD simulation performed made it possible not only to determine the patterns of pressure loss in places of liquid contaminants accumulation in the inner cavity of gas pipelines, but also to understand the gas-dynamic processes in such places, which is an unconditional advantage of this method over experimental. Research limitations/implications: The obtained simulation results showed that the increase in the volume of liquid contaminants in the inner cavity of gas gathering pipelines leads to an increase in pressure losses above the value provided by the technological regime. To achieve maximum cleaning of gas gathering pipelines, it is necessary to develop a new method that will combine the considered. Practical implications: The performed experimental results make it possible to take a more thorough approach to cleaning the inner cavity of gas gathering pipelines and to forecast in advance to what extent the hydraulic efficiency of gas gathering pipelines can be increased. Originality/value: The obtained results of CFD simulation of gas-dynamic processes in lowered sections of gas pipelines with liquid contaminants, experimental studies of the effectiveness of various methods of cleaning the inner cavity of gas gathering pipelines has original value.

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Experimental effectiveness studies of the technology for cleaning the inner cavity of gas gathering pipelines

Volovetskyi V. B., Doroshenko Ya. V., Tarayevs'kyy O. S., Shchyrba O. M., Doroshenko J. I., Stakhmych Yu. S.

Journal of Achievements in Materials and Manufacturing Engineering

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2021

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Vol. 105, nr 2

61--77

EN

Purpose: The purposes of the article are to determine the hydraulic efficiency of two gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF) and develop a set of measures to increase it; to experimentally determine the efficiency of using foams to increase the hydraulic characteristics of the gas gathering pipelines in the Yuliivskyi OGCPF; to develop a set of measures that will help to improve the hydraulic characteristics of gas gathering pipelines. Design/methodology/approach: The research methodology consists in determining the hydraulic efficiency of gas gathering pipelines before and after cleaning their inner cavity with foams with different expansion ratios and comparing the obtained values, which allows to objectively assess the efficiency of this cleaning method. The studies were performed within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The pilot testing was carried out to determine the efficiency of cleaning the inner cavity of gas gathering pipelines with foams with different expansion ratios. It showed positive results. It was determined that cleaning the inner cavity of gas gathering pipelines with foams with the expansion ratio from 80 to 90 led to an increase in the hydraulic efficiency coefficient by 10.5%, and with foams with the expansion ratio from 50 to 60 - by 5.7%. The measures taken to clean the inner cavity of gas gathering pipelines from liquid contaminations have proven their efficiency and can be recommended for other fields. Research limitations/implications: The obtained results show that it is reasonable to conduct the experimental studies on the efficiency of cleaning the inner cavity of gas gathering pipelines with the foams with higher expansion ratios. To achieve the maximum quality of cleaning the gas gathering pipelines, it is necessary to develop a new method that will combine the use of foam and gel piston. Practical implications: The performed experimental studies help to take a more reasonable approach to cleaning the inner cavity of gas gathering pipelines with foams and to predict in advance the effect of the foam expansion ratio on the hydraulic efficiency of gas gathering pipelines. Originality/value: The experimental studies on the effect of foam expansion ratios on the hydraulic efficiency of gas gathering pipelines are original.

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Developing a set of measures to provide maximum hydraulic efficiency of gas gathering pipelines

Volovetskyi V. B., Uhrynovskyi A. V., Doroshenko Ya. V., Shchyrba O. M., Stakhmych Yu. S.

Journal of Achievements in Materials and Manufacturing Engineering

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2020

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Vol. 101, nr 1

27--41

EN

Purpose: The purposes of this article are to study the effective ways of increasing the hydraulic efficiency of gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF); to calculate the operation efficiency of gas gathering pipelines of the Yuliivskyi OGCPF and develop a set of measures to monitor their condition and improve their hydraulic characteristics; to investigate the technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam, to perform the feasibility study on the prospects of its application in practice. Design/methodology/approach: The technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam was investigated to objectively evaluate its application and determine the effectiveness of this measure. The research was carried out within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The results of production studies showed that due to cleaning the flowlines of gas-condensate wells (No.85 and No.60) from the accumulation of liquid, the coefficients of their hydraulic efficiency increased by 12% and 7%, respectively. Measures taken to clean the inner cavity of the flowlines from liquid have proven their efficiency and can be recommended for other flowlines of wells at other production fields. Research limitations/implications: Based on the characteristics of gas gathering pipelines, it is reasonable to conduct experimental studies on the use of the proposed technology of cleaning the inner cavity with foam in the case of increasing its multiplicity. Practical implications: Using the wells of the Yuliivske oil and gas condensate field as case studies, the operating parameters were measured and the pressure losses along the length of the flowlines were calculated. According to the results of calculations at two wells (No.85 and No.60), a significant excess of the actual value of the flow friction characteristic over the theoretical value was established. To reduce excessive pressure losses due to the presence of liquid and improve the hydraulic characteristics of the wells, their inner cavities were cleaned using foam with the expansion ratio from 40 to 100. Originality/value: It is important to note that the advantages of foam piston include: ease of use, no occurrence of hydraulic shocks and preventing stuck during movement in the gas pipeline, application in both straight and inclined sections, no wear of the elements of the cleaning equipment, a rather efficient cleaning of gas pipelines.

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Znaczenie infiltracji wód w procesie zagęszczania gruntów bezkohezyjnych na przykładzie wyników badań z obszarów ujęć wody miasta Poznania oraz badań eksperymentalnych

Radaszewski R., Nowak M.

Biuletyn Państwowego Instytutu Geologicznego

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2011

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nr 445 Hydrogeologia z. 12/2

529--540

PL

Proces zagęszczania szkieletu mineralnego gruntów sypkich zachodzi pod wpływem wielu czynników, m. in.: wibracji, drenażu wód, przeciążenia nadkładem, itp. Jednym z ważniejszych jest opisany w artykule przepływ wody przez ośrodek gruntowy. W pracy przeanalizowano wpływ filtracji wody na zmiany upakowania szkieletu mineralnego piasków aluwialnych doliny Warty z obszarów ujęć wody dla m. Poznania i wywołany, m. in. tym procesem – spadek sprawności hydraulicznej pracujących tam stawów infiltracyjnych. Artykuł zawiera także wyniki badań eksperymentalnych, wykonywanych w ramach realizacji projektu badawczego nr NN 307 3526 33, dotyczących analizy czynników odpowiedzialnych za proces zagęszczania drobnoziarnistych osadów bezkohezyjnych. W badaniach tych określano zarówno udział procesu filtracji wody pośród innych mechanizmów odpowiedzialnych za całkowite dogęszczenie szkieletu mineralnego osadów sypkich, jak też minimalny czas niezbędny do istotnej przebudowy struktury takich gruntów. Próba porównania wyników badań prowadzonych w środowisku naturalnym z wynikami badań eksperymentalnych wynikała z faktu, że opisywane w pracy procesy zachodzą, w pierwszym przypadku, pod wpływem ograniczonej liczby czynników, przy ich stosunkowo stabilnym natężeniu. Eksperyment badawczy pozwolił zarówno rozszerzyć spektrum czynników wpływających na zmiany ułożenia szkieletu mineralnego badanych osadów, jak też stworzył możliwość analizy, większej niż naturalna, dynamiki zmian.

EN

The compaction process of loose soils mineral skeleton is influenced by many factors, e.g.: vibrations, overloading and water flow through soils. The aim of the present paper is to asses significance of the last factor. In particular were studied the effects of water filtration on changes in the compaction of the mineral skeleton of alluvial sands, and on decrease in hydraulic efficiency of infiltration ponds in the Warta river valley, in areas of water intakes for the city of Poznań. Moreover, experimental studies on the analysis of factors responsible for the compaction process in fine-grained non-cohesive deposits were also conducted (within research project no. NN 307 3526 33). It was found that, along with other mechanisms, water filtration process is responsible for the total compaction of the mineral skeleton in loose deposits and affects minimum time limit required for the significant structural reconstruction in such soils. The experiment allowed to extend the spectrum of factors affecting changes in the position of the mineral skeleton in the analysed deposits, as well as provided opportunity of assessment of wider range of dynamic of changes than in natural conditions.

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Analiza hydrauliczna zjawisk wywołujących zmniejszenie przepływności rurociągów

Kotowski A.

Ochrona Środowiska

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2010

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Vol. 32, nr 1

27-32

PL

Rurociągi wodne w czasie eksploatacji ulegają korozji i inkrustacji, będących skutkiem niestabilności chemicznej wody wodociągowej. Wykazano, że badania korozyjności wody wodociągowej mogą być pomocne do wstępnej oceny wzrostu oporności hydraulicznej rurociągów, pod warunkiem braku istotnych zmian jakości wody w badanym cza-sie. Najistotniejszy wpływ na zmniejszenie przepływności rurociągów ma już niewielki wzrost chropowatości ścian przewodów, w porównaniu do rur hydraulicznie gładkich. Jednak przy dużej chropowatości ścian rurociągu spadek jego przepływności wynika już głównie z fizycznego zmniejszenia przekroju rurociągu, a tylko w niewielkiej części z oporów ruchu. Na drodze analitycznej i doświadczalnej dowiedziono, że uzależnienie wartości współczynnika szorstkości (n) we wzorze Manninga od liczby Reynoldsa i chropowatości (k) czyni tę metodę wymiarowania rurociągów równie dokładną, jak metoda oparta na wzorach Darcy-Weisbacha i Colebrooka-White'a.

EN

While in service, water pipelines undergo corrosion and develop incrustations, which is attributable to the chemical instability of tap water. This study reports the following findings. Tap water corrosivity tests can be regarded as a useful tool for the preliminary estimation of the increase in pipeline roughness, provided that no significant changes in water quality were observed at the time of the research. Compared to smooth pipes (in hydraulic terms), even a slight increase in the wall roughness of the pipes becomes a substantial contributing factor in the decrease of pipeline flowability. At a high wall roughness, the decrease in the flowability of the pipeline is attributable primarily to the physical reduction in the pipe cross-section; the contribution of flow resistance is less important. The author has demonstrated, both by analysis and by experiments, that relating the value of the roughness coefficient (n) in Manning's equation to Reynolds number and roughness (k) renders this method of pipeline dimensioning as accurate as the method based on Darcy-Weisbach and Colebrook-White equations.

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Badania sprawności hydraulicznej w mieszalniku z dwoma mieszadłami na wspólnym wale

Duda A., Kamieński J., Talaga J.

Inżynieria i Aparatura Chemiczna

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2009

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Nr 1

92-93

PL

W pracy przedstawiono wyniki obliczeń sprawności hydraulicznej dla różnych układów dwóch mieszadeł na wspólnym wale, wyznaczonej w oparciu o wydajność pompowania oraz wydajność przepływu cyrku-lacyjnego w mieszalniku. Zbadano wpływ odległości pomiędzy mieszadłami na wartość sprawności hydraulicznej w mieszalniku dwustopniowym.

EN

Results of the pumping and the circulation efficiency for different impeller configurations in a dual agitated vessel are presented in the paper. An influence of impellers' spacing on the pumping and circulation efficiency was examined.

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Identyfikacja hydraulicznej sprawności czynnych sieci wodociągowych

Siwoń Z.

Instal

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2004

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nr 5

26--32

PL

Zaprezentowano zagadnienia modelowania przepływów w systemach dystrybucji wody oraz praktyczne problemy kalibracji modeli. Omówiono zasady oceny zastępczych chropowatości ścianek przewodów wodociągowych oraz hydraulicznej sprawności czynnych sieci wodociągowych na podstawie rezultatów pomiarów terenowych i kalibracji modeli przepływów.

EN

Some problems of the modelling of water distribution systems are presented. Special consideration was given to practical problems of the calibrating water supply network models. On the basis of the results from in-situ measurements and calibrating the water supply network models the specific wall roughness of pipes and the hydraulic efficiency of the water supply networks were determined.