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    Wyświetlanie 1-4 z 4
    Tytuł:
    Modern methods of elimination of lost circulation in directional wells
    Autorzy:
    Ivanova, Tatiana N.
    Żabińska, Iwona
    Powiązania:
    https://bibliotekanauki.pl/articles/1537993.pdf
    Data publikacji:
    2021
    Wydawca:
    STE GROUP
    Tematy:
    liquidation of acquisitions
    drilling tool run-in-hole/put-out-of-hole
    restoration of circulation
    drilling process
    lowering or cementing of the production casing
    Opis:
    Losses of drilling mud and other fluids is the one of the major types of drilling troubles. Annual time losses for their elimination by oil and gas companies are huge. The factors, influencing the mud losses and regulating the direction of the further works, can be divided into two groups: geological and technological. Conducted studies on the use of an insulating composition based on chromium acetate made it possible to identify: the use of the insulation composition on the chrome acetate base allows considerable reduction of time required to eliminate disastrous circulation loss without installation of cement plugs; avoiding BHA replacement; avoiding drilling-in after bullheading and overlapping of lost-circulation layer; low cost, possibility of fast preparation, as it does not entail the delivery of additional chemicals, which also contributes to reduction of time required to eliminate disastrous circulation loss; the use with every type of drilling mud. Basing on the positive experience of the use of this composition in the neighboring regions and considering its economic side, the technique can be used in regions of the Udmurt Republic.
    Źródło:
    Management Systems in Production Engineering; 2021, 1 (29); 65-74
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technological Capabilities of Well Cementing
    Autorzy:
    Ivanova, Tatiana N.
    Zasadzień, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/2064552.pdf
    Data publikacji:
    2021
    Wydawca:
    STE GROUP
    Tematy:
    cementing of casing string
    isolation of water-bearing horizon
    cement slurry injection
    squeezing
    Opis:
    Cementing of casing string is a final operation before the next stage of well construction; it provides maximum operational life of the well. Cementing of casing string is carried out with the use of technology, based on squeezing of the whole volume of drilling mud by special grouting composition. The main purposes of cementing include isolation of water-bearing horizon, strengthening of borehole walls in unconsolidated and unstable rocks. Well cementing process is divided into five subsequent operations. Firstly, grouting mixture is prepared in concrete mixers (cementing units) with necessary water-to-cement ratio and additives. Secondly, prepared grouting solution is injected in a well. Thirdly, the solution is squeezed into the space between the casing pipes and wellbore walls. Then it is necessary to wait until the cement sheath is hardened. And at last, quality control is carried out. For convenient transportation, the equipment for well cementing is installed on the truck chassis (KAMAZ, URAL and etc.). All components are poured in concrete mixer, then the water is added and everything is being mixed until formation of uniform mass, which is later pumped in a well. Oil and Gas Industry Safety Regulations say that «calculated endurance of casing string cementing should not exceed 75% of time of cement thickening, established by laboratory tests». Therefore, it is necessary to carry out all operations of injection of fluids into the well as soon as possible without any incompliances of the cementing technology. With cementing material used and its water-to-cement ratio of 0.5, the average time of cement thickening is 120 minutes, according to laboratory tests. Therefore, a set of operations of injection of fluids should not exceed 90 minutes.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2021, 4, 1; 465--478
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technological Forecasting of Deformations in Flat Parts
    Autorzy:
    Ivanova, Tatiana N.
    Biały, Witold
    Fries, Jiri
    Nordin, Victor
    Powiązania:
    https://bibliotekanauki.pl/articles/2064652.pdf
    Data publikacji:
    2020
    Wydawca:
    STE GROUP
    Tematy:
    deformation
    state stress
    stress diagram
    residual stresses
    stress formation
    grinding
    Opis:
    The deformation of a part occurring in the process of grinding directly influences its exploitation and quality parameters. The instability of shape and size, which occurs due to an imbalance of residual stress, can be the one of the major causes of deformation of a part. The decrease in stress slows down the deformation process. Considering the regularities of heat source intensity dependence on the grinding modes, it can be asserted that with increasing grinding depth and grinding wheel hardness, the value increases and it decreases with a growth in a speed of the part and the use of cooling. The higher the heat removal is and the better lubricant properties of the liquid are, the more significant the decrease in is. Changing these values allows regulation of the residual stresses. As a result of the research on determination of deformations, it is recommended to reduce thermal deformations by considering the geometric size of a plate to be machined, linear expansion coefficient of plate material and an allowance for nonflatness from thermal deformations. The value of nonflatness from thermal deformations is directly proportional to linear expansion coefficient of plate material and its square overall dimensions. At the same time, the value of nonflatness is inversely proportional to the plate thickness.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 1--12
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Prospects of Abrasive Treatment of Tough-To-Machine Materials
    Autorzy:
    Palacz, Magdalena
    Ivanova, Tatiana N.
    Kozlov, Alexander M.
    Kaniak, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/2064680.pdf
    Data publikacji:
    2021
    Wydawca:
    STE GROUP
    Tematy:
    face grinding
    grinding wheel
    steel
    vortex air cooling
    cooling-lubricant technological fluid
    Opis:
    In current conditions, great attention is paid to the quality of parts, which is in many ways determined by finishing operations of mechanical treatment, with surface grinding being the most widespread. Grinding process efficiency, abrasive tool wear intensity, machined surface quality and other features of grinding process depend on properties of the environment, where the cutting process takes place. Forced changing of conditions of this environment is one of the ways to control and optimize the grinding process, which can be reached due to finding new technological decisions. One of the most promising directions to solve this problem is the process of face grinding with discontinuous grinding tool and supply of cooling fluid or air in the cutting zone directly. Carried analysis of features of face grinding has shown that heat density can be decreased by the usage by grooved wheels with vortex air cooling or by supply of cooling-lubricant technological fluid. Obtained dependences of temperature field of part surface during grinding establish the influence of the length of working shoulders and grooves, vortex tubes number, outflow rate, temperature and flow rate of cold vortex flow of air. These data provide conscious control over the process of discontinuous face grinding by changing wheel grain size and grinding speed.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2021, 4, 1; 166--177
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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