Wyniki wyszukiwania - BazTech

1

Mathematical model of gas-liquid-sand mixture separation in the four-phase separator of inertial type for subsea application

Kopey B. V., Kryvonozhko T. A., Liakh M. M., Yuriev E. V.

AGH Drilling, Oil, Gas

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2016

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Vol. 33, no. 2

361--377

EN

In this article the construction and mathematical model of four-phase separator is realized, which is based on inertial separation mechanism of gas-liquid-sand mixture. Also we have put the problem on the basis of this model to obtain the dependence of separator efficiency on the parameters which play a crucial role in the technological process of separating gas-oil-water-sand mixture into a solid, liquid and a gas phase.

2

Fatigue failure study of fiberglass sucker rods joints

Kopey B. V., Bednarz S., Shuanjui Y.

AGH Drilling, Oil, Gas

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2016

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Vol. 33, no. 1

31--37

EN

Fiberglass sucker rods are fiberglass rods (body) of polymeric composite materials (PCM), which are connected with steel heads. In this paper, an analysis of the fatigue strength of joints of fiberglass sucker rod under different bending stresses is performed and from this the key indicators of fatigue strength are derived. The main scope of fiberglass sucker rod is the use in aggressive environment because the plastic and glass fiber is not exposed to corrosion. Long-term strength and durability of operation – it’s the most important characteristics used in the design and operation realized in sucker rod, made of polymer composite materials (PCM). The aging of polymers and fiberglass sucker rod fracture leads to an emergency in the operation of oil wells and need to execute the workover. Based on the found contact problem solving using computers strength characteristics of the compounds were analyzed, dependence of contact pressure on the value of shear compliances of shell material, orthotropy option, size of joint were obtained.

3

Prediction of pumping units reducers' resource

Kopey B. V., Bednarz S., Steafanyshyn O. I.

AGH Drilling, Oil, Gas

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2014

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Vol. 31, no. 1

117--122

EN

Periodic monitoring of pumping units reducer vibration allow for a prediction of its full or residual resource to the next repair, which can be estimated on the basis of extrapolation methods and classification . Considering these two methods, we can say that the advantage extrapolation method has its accuracy and the possibility of adaptation to each specific gear, and the disadvantages include its complexity and the need to respect the conditions of constant change over time the vibration characteristics of the selected gear by law. In the application of classification method, which is simple, you need to process a certain amount of statistical data derived from the operation of machines, swing or perform experiments on a special stand that is relatively complex. In addition, the practice shows that the use of statistical techniques often makes accurate predictions due to the large gap modes of machines, swing and various properties of the pumped wells product, so the decision was made in solving this problem use the method of construction and extrapolation of time trend change of gear operating parameters. In Borislav CBPC the diagnostic examination of a number of reducers RN -2300 were conducted and the optimal level of vibration determined, whereby it can be concluded the qualitative repair of this type of gear . Some sensors during testing were installed on the gear housing near the output shaft. The average frequency of rotation of the input shaft gear was during vibroobservations was obtained respectively: /vh = 3.9 Hz and /vh = 3.53 Hz. Processing of the results was conducted by software MathCAD. Acceptable level of vibration that is recommended by standard GOST ISO 8579-2-2002 for gear RN -2300 is 8.3 mm / s, which can be used to determine its suitability for further exploitation . According to calculations conducted by an appropriate method the acceptable level of vibration above mentioned gear is 3.1 mm / s. These valid values are in good agreement with the experimental values and have a lower level compared to the standard recommendations. According to conducted researches the curve of resource prediction for gear of pumping unit has been plotted. Thus, the expected service life of the gear RN -2300 of pumping unit will be approximately 36-38 thousand hours.

4

Research of stress-deformation state of worn and corroded sucker rod thread connection

Kopey B. V., Mykhailiyuk V. V.

Ochrona przed Korozją

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2013

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nr 11

519--524

EN

Threaded connections are responsible assemblies defining the reliability of sucker rod string. Despite the variety of their design, industrial materials analysis shows that breakages occur in rod body and threaded connections. In the process of lowering and lifting operations to replace the well pump is repeated screwing and unscrewing of sucker rods threaded joints, so the pin threads and couplings are worn. After analyzing the method of determining the amount of wear the pin threads for screwing and unscrewing, tightening the connection and breakout sucker rods, the proposed S. A. Babayan, it was found that the amount of thread wear during the makeup at 20 ... 30 times the thread wear when fastening and according to this method three last threads of practically no wear and deterioration of the first coil 10–12 times bigger then the wear of the last turns. The results of calculation correspond with the operation of wear of sucker rods in an industrial environment. To identify and compare the distribution of stresses in the sucker rods threaded connections using the developed computer ANSYS finite element axisymmetric models of new and worn standard threaded connections with a diameter of 19 mm were created. Screw connections were loaded by axial force and torque make-up. After analyzing the results of the simulation we concluded that an increase of wear of sucker rod stress distribution in pin thread becomes uniform, respectively, it has a positive effect on the durability of the threaded connection under cyclic dynamic loads. With further deterioration thread tension rising in the middle turns, and in extreme - are reduced, and the impact of further deterioration in the durability of the connection is negative. Also it have been found that at the limit wear of thread the maximum stresses are concentrated in the thread coupling, resulting in a fracture of her body.

PL

Połączenia gwintowe odpowiadają za trwałość i stabilność konstrukcji kolumny żerdzi pompowych. Pomimo różnorodności wersji konstrukcyjnych, analizy materiałów przemysłowych wykazują, że uszkodzenia powstają zarówno na żerdziach pompowych jak i na połączeniach gwintowych. Podczas prac związanych z podnoszeniem-opuszczaniem pompy w celu jej wymiany następuje wielorazowe skręcanie i rozkręcanie połączeń gwintowych żerdzi pompowych, na skutek czego następuje zużycie gwintów złączek i muf. Po przeprowadzeniu analizy zaproponowanej przez S.A. Babayana metody określenia zużycia gwintu złączek podczas skręcania-rozkręcania, dokręcania oraz demontażu żerdzi pompowych ustalono, że zużycie gwintu podczas skręcania jest 20 do 30 razy większe niż podczas dokręcania. Wg danej metody trzy ostatnie zwoje gwintu praktycznie się nie zużywają, a zużycie pierwszego zwoju jest 10 do 12 razy większe niż zużycie ostatnich zwojów. Otrzymane wyniki odpowiadają danym zużycia podczas eksploatacji połączeń gwintowych żerdzi pompowych w warunkach przemysłowych. W celu ujawnienia i porównania rozkładu naprężeń w połączeniach gwintowych żerdzi pompowych w środowisku ANSYS zostały opracowane komputerowe osiowosymetryczne modele metodą elementόw skończonych nowych oraz zużytych standardowych połączeń gwintowych o średnicy 19 mm. Połączenia gwintowe zostały obciążone siłą osiową oraz momentem dokręcenia. Na podstawie analizy wyników modelowania można wnioskować, że wraz ze zwiększeniem zużycia połączenia gwintowego żerdzi pompowej rozdział naprężeń w wgłębieniach gwintu złączki staje się bardziej równomierny, co ma pozytywny wpływ na wydłużenie okresu eksploatacji połączenia gwintowego w warunkach dynamicznego obciążenia cyklicznego. Podczas dalszego zużycia gwintu w średnich zwojach naprężenia wzrastają, a w skrajnych – zmniejszają się, co ma negatywny wpływ na okres eksploatacji połączenia gwintowego. Ustalono również, że przy granicznym zużyciu połączenia gwintowego maksymalne naprężenia są skoncentrowane w wgłębieniu zwoju gwintu złączki, na skutek czego następuje zniszczenie złączki.

5

Effect of changes in operating power of gasmotocompressors 10 GKN on the diagnostic signs of connecting rod bearings defects

Kopey B. V., Galiy S. I., Bednarz S.

AGH Drilling, Oil, Gas

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2013

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Vol. 30, no. 1

145--150

EN

The increasing of gasmotocompressors (GMC) reliability, operated on the booster compressor stations, underground gas storages with significant deterioration of the park units are the actual problems. The greatest attention should be paid timely detection of conrod bearings defects for the prevention of necks crankshaft scoring. Statistics increase of late crank bearings defects shows that scheduled repairs not ensure reliable operation of GMC. Improving the reliability of GMC through the detection in time the crank bearings defects is only possible using the methods and diagnostic tools for calculating the probability of failure-free operation, equipment failure rate during its operation. Increased probability of crank bearings defects detection is possible by the determination of dependence of levels of crank bearings vibration on gasmotocompressors 10 GKN operational capacity. For efficient conducting of connecting rod vibration condition monitoring on units with different power the software was developed and methods of using the obtained models depending on the power levels of vibration were elaborated.

6

Analysis of pumping unit reducers diagnostic algorithms by formalized methods

Kopey B. V., Stefanyshyn O. I., Bednarz S.

AGH Drilling, Oil, Gas

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2012

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Vol. 29, no. 1

207-215

EN

Diagnostic model of pumping unit reducer is designed for the construction and analysis of algorithms by diagnosing formalized methods. The using of the diagnostic model allows us to ease and formalize decisions on the diagnostic problem. For the synthesis of algorithm for diagnosing the functional-logical model has been selected, which allows to consider the links between individual elements and assemblies of the reducer by simple means and consider the impact of these items on measuring diagnostic features. For a more detailed study of processes occurring in the gearbox of pumping unit, and facilitate the development of its diagnostic model, a functional diagram of reducing gear was built. Diagnostic logic model will help to establish and classify defects in development, to determine the direction of their development and cause-effect relationship with other defects.

PL

Diagnostyczny model reduktora jednostki pomp zaprojektowano w celu zbudowania i przeanalizowania algorytmów za pomocą metod formalnych. Wykorzystanie modelu diagnostycznego ułatwia i formalizuje proces decyzyjny w kwestiach diagnostyki. W celu scalenia algorytmu diagnostycznego zastosowano model funkcjonalno-logiczny umożliwiający przeanalizowanie powiązań między poszczególnymi elementami a zestawami reduktora za pomocą prostych środków oraz rozważenie wpływu tych elementów na pomiar cech diagnostycznych. W celu umożliwienia bardziej szczegółowych badań procesów występujących w skrzyni przekładniowej jednostki pomp oraz w celu opracowania modelu diagnostycznego stworzono funkcjonalny schemat przekładni redukcyjnej. Logiczny model diagnostyczny pozwoli ustalić i sklasyfikować pojawiające się uszkodzenia, określić ich kierunek rozwoju oraz mechanizmy przyczynowo-skutkowe z innymi uszkodzeniami.