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    Wyświetlanie 1-5 z 5
    Tytuł:
    Drill string rotary speed influence on equivalent circulating density value
    Autorzy:
    Wiśniowski, R.
    Skrzypaszek, K.
    Kiebzak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/298691.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    ECD optimization
    drill string rotary speed
    equivalent circulating density
    wellbore pressure management
    Opis:
    Presented article displays a debate about very complex and still not fully understood issue of drill string rotary speed (DSRS) impact on pressure losses in wellbore annulus, thus Equivalent Circulating Density (ECD) value. With the aim of exploring the topic, series of numerical simulations were conducted and presented in following paper. Real, field data from two already accomplished wells was used to recreate actual wellbores conditions in Halliburton Landmark Drilling Software and to calculate ECD values. Dedicated to check and confirm the program’s results accuracy, the outcomes were compared with pressure while drilling (PWD) equipment measurement results, collected during drilling operations. Collaterally, numerical simulations were made in order to analyze how drill string rotary speed shifts may affect overall ECD value, especially in deviated and horizontal wellbore sections. Simultaneously, both rate of penetration and flowrate were modeled to imitate poor and good cleaning conditions. Additionally with the object of confronting received results, in the article are included outcomes of other researchers conducted by T. Hemphill and K. Ravi (2011), I. Kjøsens, G. Løklingholm et al. (2003). Similarly to above mentioned papers, analysis and interpretation of collected data gave contrary conclusions. In other words DSRS can positively impact optimization of ECD value but in the same time cause growth of ECD parameter, depending on current wellbore conditions.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 283-294
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitorowanie wpływu wybranych czynników na zużycie elementów zestawu wiertniczego i sposoby jego ograniczenia w Exalo Drilling S.A.
    Monitoring the influence of selected factors on the wear of drill string set and ways to reduce it in Exalo Drilling S.A.
    Autorzy:
    Beliczyński, Rafał
    Suszko, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/298621.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    zużycie
    zestaw wiertniczy
    technologia wiercenia
    wear
    drill string set
    drilling technology
    Opis:
    Celem artykułu jest przedstawienie szkodliwego wpływu na zestaw wiertniczy takich czynników jak korozja chemiczna, wpływ H2S oraz czynników mechanicznych. Dokładna analiza, a także studiowanie przyczyn uszkodzeń zestawu przewodu wiertniczego pozwalają na opracowanie procedur poprawiających żywotność sprzętu wiertniczego, a tym samym wskaźniki bezpiecznego wiercenia. W procesie wiercenia kolumna zestawu wiertniczego poddawana jest siłom rozciągającym, zginającym, skręcającym, ściskającym, tarcia oraz niekorzystnemu wpływowi płynów wypełniających otwór wiertniczy, zarówno tym technologicznym, jak i tym pochodzącym z górotworu. W celu przeciwdziałania potencjalnym uszkodzeniom stosowany jest sprzęt o wyższych parametrach wytrzymałościowych. Musi być on odporny na szybkie zużycie, często jest wykonany z droższych materiałów, niejednokrotnie produkowany według zaawansowanych technologii, z jednoczesnym uwzględnieniem ograniczeń techniczno-technologicznych, ekonomicznych i geologicznych. Monitorowanie wpływu zjawiska korozji, któremu poddawany jest zestaw przewodu wiertniczego, ma priorytetowe znaczenie na bezawaryjne wiercenie. W kolumnie zestawu wiertniczego umieszczane są tzw. pierścienie korozyjne. Analiza ubytku ich wagi pozwala na bieżące korygowanie składu płuczki, przez dodawanie do niej np. inhibitorów korozji.
    The main target of this article is presenting harmful effect for the drilling set such factors as chemical corrosion, the H2S influence and mechanical abrasion. Precise analysis, studying of the damage causes for the drill string, allows on the procedures develop improving for the drilling equipment long life, and thus the safe drilling indicators. During the drilling process, the drill string column is subjected to: tensile, bending, torsional, compressive, friction and harmful effects of fluids which are filling the borehole. These processes are related to drilling technology and also with the drilling rock layers. In order to counteract potential damage, we use equipment with higher strength parameters. It must be resistant for quick wear, it is often made of more expensive materials, also must be produced according to advanced technologies, with simultaneous consideration of technical and technological, economic and geological limitations. The monitoring of the corrosion phenomenon effect which the drill string is subjected. It is a priority for failure free drilling. In the drill set column are located the so-called corrosion rings. Analysis of the corrosion rings weight losses allows on the current correction of the mud specifications by adding for example corrosion inhibitors.
    Źródło:
    AGH Drilling, Oil, Gas; 2019, 36, 1; 75-91
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The problem of liquidation of the open eruption by drilling tools
    Autorzy:
    Bujok, P.
    Fibinger, J.
    Klempa, M.
    Porzer, M.
    Kalus, D.
    Rado, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/298940.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    liquidation of open eruption
    drilling tools
    drill string
    Opis:
    Drilling process of deep borehole consists of different drilling operations. Each of them can cause numerous different drilling problems especially when a borehole is performed. While drilling the most dangerous problems can occur once the drilling fluids (oil, gas or water) spontaneously flow out from the drilled formations into the borehole and then to the surface. It can also happen that the pressures in the borehole are not balanced and an influx of fluid into the borehole (a kick) will occur. If no action is taken to stop a kick once it begins, then the fluids will be pushed out of the borehole and will be flowing uncontrollably to surface (blow-out). Blow-out is prevented by closing off the well at the surface with special kind of valves (Blow-out Preventers - BOPs). When pressure control over the well is lost, swift action must be taken to avert the severe consequences. These consequences may include: — endangering of human life, — loss of rig and equipment, — negative influence on the environment, — additional costs of bringing the well under control again, — loss of reservoir production. In the case of kick or blow-out will occur in the practical use are different procedures and methods to control a borehole. These procedures and methods depend on the actual drilling operation scenario. One of them can be a tripping operation when the drill string is pulled out or run back again. In this case the drill string is open either after a break-out or before making up the drill pipes and drill collars. There is a variety of tools that can be used to prevent the formation of fluids rising up inside the drill pipes. One of this tool is a safety valve (rod preventers - BOP) to prevent the blow-out of the drill string. This manuał safety valve should be kept on the rig floor at all times. It needs to be a fuli opening ball-type valve so there is no restriction to flow. This valve is installed onto the top of the drill string if a kick occurs during a trip. However, this solution is quite inconvenient and difficult because involves special heavy tools, e.g. a crane. Drilling process of deep borehole consists of different drilling operations. Each of them can cause numerous different drilling problems especially when a borehole is performed. While drilling the most dangerous problems can occur once the drilling fluids (oil, gas or water) spontaneously flow out from the drilled formations into the borehole and then to the surface. It can also happen that the pressures in the borehole are not balanced and an influx of fluid into the borehole (a kick) will occur. If no action is taken to stop a kick once it begins, then the fluids will be pushed out of the borehole and will be flowing uncontrollably to surface (blow-out). Blow-out is prevented by closing off the well at the surface with special kind of valves (Blow-out Preventers - BOPs). When pressure control over the well is lost, swift action must be taken to avert the severe consequences. These consequences may include: — endangering of human life, — loss of rig and equipment, — negative influence on the environment, — additional costs of bringing the well under control again, — loss of reservoir production. In the case of kick or blow-out will occur in the practical use are different procedures and methods to control a bore¬hole. These procedures and methods depend on the actual drilling operation scenario. One of them can be a tripping operation when the drill string is pulled out or run back again. In this case the drill string is open either after a break-out or before making up the drill pipes and drill collars. There is a variety of tools that can be used to prevent the formation of fluids rising up inside the drill pipes. One of this tool is a safety valve (rod preventers - BOP) to prevent the blow-out of the drill string. This manuał safety valve should be kept on the rig floor at all times. It needs to be a fuli opening ball-type valve so there is no restriction to flow. This valve is installed onto the top of the drill string if a kick occurs during a trip. However, this solution is quite inconvenient and difficult because involves special heavy tools, e.g. a crane. This paper presents a new solution making use of special control equipment for the blowing open drill string. This equipment is based on a hydraulic press (named "Drill Pipę Rescue Press I") which has been developed by HBZS, MND S.A. Hodonin and VSB-Technical University of Ostrava, supported by Faculty of Drilling, Oil and Gas AGH-UST Kraków.
    Źródło:
    AGH Drilling, Oil, Gas; 2014, 31, 2; 199-205
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analytical study of the efficient operation modes of oil-gas jet pumps used in oil wells
    Autorzy:
    Dubei, Olga
    Powiązania:
    https://bibliotekanauki.pl/articles/298679.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    oil well
    sucker rod pump
    jet pump
    thermobaric parameters
    mixed flow
    tandem installation
    string load
    Opis:
    A perspective way of oil wells operation is to use sucker rod pumps, in combination with oil-gas jet pumps. Placing a jet pump above the dynamic level in the well and operating it simultaneously with the sucker rod pumps allows to stabilize the work of the rod pump, avoid fluctuations of the dynamic level and facilitate the rise of the production liquid to the surface due to the reduction of the density of the mixed flow after the jet pump. In order to implement such oil-gas jet pump in oil wells that are operated by sucker rod pumps, it is necessary to determine their operating modes and choose the most effective among them. A methodology for calculating the operation mode of such well was created that allows determining the efficient location of jet pumps in oil wells and their geometry. When developing this methodology two conditions were taken as a main aim: the whole amount of free gas, which enters the casing annulus of the well, must pass through the oil-gas jet pump and to reach the maximum possible decreasing of the string load. For the 753-D oil well in Dolyna Oil Field calculated efficient operation mode shows the possibility to decrease string load by 26%, reduce electricity consumption and, respectively, investments in oil extraction.
    Źródło:
    AGH Drilling, Oil, Gas; 2019, 36, 1; 19-29
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Special shut off device for liquidating blowout from the drill string
    Autorzy:
    Bujok, P.
    Klempa, M.
    Ryba, J.
    Porzer, M.
    Jakubcik, M.
    Stastny, L.
    Rado, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/299221.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    blowout
    blowout killing
    damaged drillstring
    oil and gas drilling blowout equipment
    Opis:
    Crude oil and natural gas belong to the most important raw minerals used by industry. Their world’s consumption remains on a high level with an increasing tendency, similarly the demand for exploration-prospecting works. The drilling works associated with reservoir prospecting and development are connected with the risk of reaching intervals containing highly pressurized formation fluids and with blowouts. When drilling the first well in a given area, the operator frequently does not have a full set of data about reservoir parameters of the drilled horizons. Investors want the drilling companies finish their works in the shortest possible time, therefore technologies which maximize the drilling advancement are employed. One of such techniques is drilling with minimally higher hydrostatic pressure of mud as compared to the reservoir pressure. If the drilling hits a porous interval of elevated reservoir pressure, reservoir fluid may inflow to the wellbore. If the hydrostatic pressure of fluid column in the wellbore is lower than reservoir pressure, the wellbore will be fed with reservoir water, which will consequently migrate towards the top of the well. This may result in a kick and then a blowout. The inflow to the wellbore can be handled only by well trained crew and appropriate equipment. The crew has to recognize the flow, and depending on the condition of the well take suitable measures. Sometimes the lack of proper training, errors, hardware failures and improperly protected top of the well lead to a fully developed blowout from the well. Particularly dangerous are cases when the surface blowout prevention equipment or other elements of the well BOP facilities break down. In such situations rescue teams with specialist equipment have to be involved. Exemplary applications and technological potential of specialist blowout control equipment in uncontrolled kick of reservoir fluid though the string are presented in the paper. The designed tool and its functions allow for killing or reducing the outflow.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 309-321
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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