Browsing by Subject "drilling"

Now showing 1 - 20 of 77

Access status: Open Access ,
A review of pile machines and their selection criteria
(2015) Gonet, Andrzej; Stryczek, Stanisław; Fyda, Michał
Many geoengineering investments can be realized thanks to the use of piles, which may play numerous functions. The piles were classified in the paper in view of assumed criteria and most frequent applications. These works can be performed with specialist pile equipment. In the description attention was paid to the most important technical parameters of pile machines produced by such companies as Bauer, Casagrande and Soilmec. The multi-criteria method with a synthetic measure of evaluation was used for selecting the most suitable pile machine. Among the assumed criteria were the pull up/down force, torque, maximum depth and diameter of the pile and the main winch. The analysis of the obtained weights and criteria revealed that the Bauer pile machine BG 50 had the highest CCS pull up/down and torque and was most appropriate for making long and large-diameter piles.
Access status: Open Access ,
A study of the resistance of sucker rods to fatigue failure
(Wydawnictwa AGH, 2023) Gara, Paweł; Fedorovych, Yaroslav; Kopey, Bogdan
The article presents the results of laboratory tests on the fatigue of samples made from full-scale sucker rods of 15H2GMF steel in various corrosive environments. For comparison, similar tests were carried out on corrosion fatigue of samples made from fullscale sucker rods of steels 20N2M, 15H2NMF and 15N3MA. The limited endurance limit of the tested rods of 15H2GMF steel in formation water is 22 lower than that of 20N2M steel and 13 lower than that of 15H2NMF steel, and in an environment simulating the action of H2S it is 34 lower than that of 20N2M steel and 32 lower than that of steel 15H2NMF. The results were obtained using a complex surface method of strengthening sucker rods, which was developed in the laboratory of the Department of Oil and Gas Machines and Equipment of the Ivano-Frankivsk National Technical University of Oil and Gas and tested at the NGVU “Dolynanaftogaz”.
Access status: Open Access ,
About the issue of determination of solid rocks position in the coal bed's top wall in lignite quarries using drilling works
(2009) Mazáč, Josef; Kurka, Miroslav; Mikoláš, Milan
Overburden mining in lignite quarries has to deal - among other difficulties - with the occurrence of rocky grounds. The mining and exploration of these rocks requires increased cots and implementation of special technologies. These rocks are coherent or incoherent bodies of various shapes, ticknesses, sizes and types of placement. These various types of rocky grounds are bound to different geological structures and types of mother soils, because they originate from various periods of diagenesis of top wall soils - clays and sands. Actual experiments using geophysical methods of occurrence examination of these solid rocks have not brought expected and necessary results there. The failure of application of geophysical methods (caused by their inaccuracy, small depth range, and problematic implementation in the conditions of the mine Bilina) proves that one of possible solutions, which would credibly specify the range and placement of solid sandstone bodies, is the utilization of drilling exploration in an inspissated boring network suitably chosen for this purpose. With the issue of determination of these solid rocks by use of drilling works deals this paper.
Access status: Open Access ,
An analysis of fluids after hydraulic fracturing in the aspect of their further use or neutralization
(2013) Jamrozik, Aleksandra; Gonet, Andrzej; Czekaj, Lucyna
Today’s ecological policy focuses on preventing anthropogenic environmental hazards. A large share of activities are oriented to the precise recognition of hazards and use of solutions thanks to which the negative environmental effects of mining activity can be considerably reduced. Issues related to the recovery of water after hydraulic fracturing with emphasis on the possible utilization and management of fluids after hydraulic fracturing in Polish conditions are discussed in view of the respective law.
Access status: Open Access ,
Analiza konstrukcyjna stref zgrzania rur płuczkowych
(2008) Artymiuk, Jan; Bednarz, Stanisław; Kiełbik, Wiesław
During drilling operations in the well Odrowążek 1 in the north part of the Świętokrzyskie Mountains nine instances of string breaking took place. They were recurrent, similar in character and place of occurrence. The elements of the broken string were analyzed for their construction, non-invasive analyses, material tests and strength analysis. The results of the construction analysis are presented in the paper.
Access status: Open Access ,
Analiza sił tarcia podczas wiercenia otworu pilotowego horyzontalnego przewiertu sterowanego
(2005) Wiśniowski, Rafał; Ziaja, Jan
The possibilities of predicting weight on bit or draft force in the course of specific technological stages of horizontal directional drilling are presented in the paper. For this purpose, factors influencing the process of string and drilling bit movement are analysed. Then follow dependences, on the basis of which friction forces acting in the borehole can be determined. Practical application of the proposed procedures is exemplified.
Access status: Open Access ,
Analiza techniczna technologii wykonania przewiertu horyzontalnego pod rzeką Uszwicą w Brzesku Okocimiu
(2005) Ziaja, Jan; Baniak, Krzysztof
A horizontal borehole under the Uszwica River bed underwent a technical analysis. It was based on in situ analysies of mechanical parameters of drilling and laboratory tests of the collected samples. Mechanical parameters of drilling used in the project were assessed. The paper is closed with conclusions and recommendations for such drilling works to be done in the future.
Access status: Open Access ,
Analiza zjawisk zachodzących podczas zagęszczania strefy przyotworowej w trakcie rozpychania gruntów luźnych narzędziami poszerzającymi
(2006) Ziaja, Jan; Wiśniowski, Rafał
Owing to the pushing of drilling tools through a horizontal well, the ground thickens around the bore. The radius of the thickened zone depends on numerous technical and natural factors. The physical effects taking place in the course of loose grounds thickening accompanying horizontal drilling are analysed in detail. The proposed equations and formulae may be handy for assessing the radius of ground thickening and stability of the horizontal wellbore.
Access status: Open Access ,
Analysis of the potential heating of selected student residences at The AGH University Of Krakow using the earth’s heat
(Wydawnictwa AGH, 2023) Sapińska-Śliwa, Aneta; Kunasz, Remigiusz; Śliwa, Tomasz
The aim of this study was to adapt the operating parameters of a geothermal heat pump system to the required average power needed to meet the energy for central heating and domestic hot water of selected student residences. Calculations of the average power required by the dormitories in the AGH University Student Campus were carried out, as well as modelling of the deep borehole heat exchanger for the heating load. The designed heating system for the student residences in the AGH University Student Campus using a deep borehole heat exchanger – is sufficient to cover the base heat demand for five four-storey dormitories. During the writing of the paper, the main problem was the low availability of articles on deep borehole heat exchangers. This is due to the continuous development and testing of new engineering ideas. Deep borehole heat exchangers can be use as new boreholes or wells prepared for liquidation. Also use of closed boreholes sometimes is possible, depending on project of liquidation. The future districy heating will use low-temperature heat carrier for heating and cooling. Use borehole fields as rockmass use for heat and/or cool ,storage will be common.
Access status: Open Access ,
Analysis of the use of a down-hole mechanical cleaning device for efficient wellbore cleaning
(2007) Qureshi, Ali; Miska, Stefan; Miska, Włodzimierz
Field evidence indicates that in highly deviated and horizontal wells, cuttings tend to accumulate on the lower side of the annulus under the influence of gravity and eventually may form a non moving bed. This leads to considerable increase in equivalent circulating density (ECD) and drag/torque as well may result in a differential pipe sticking and wellbore stability problems. A good control of drilling fluid rhelogical properties, flow rate and drillpipe rotational speed may not be sufficient in some instances. Also, the commonly used techniques of circulation at high flow rates, using sweeps of high/low viscosity and high density may not be possible and, at times, prove to be ineffective. To overcome this difficulty, a down hole cleaning subs (mechanical cleaning devices - MCDs) are incorporated in the drill string to agitates the cuttings bed by bringing the cuttings into suspension for subsequent carrying out by the drilling fluid to the surface. These devices are furnished with "blades" which produce the desired hydrodynamic effects as the drill string is rotated and helps to dislodge the cuttings from the bed. The hole cleaning is thus governed primarily by the agitation created by the device, the rheological properties of the mud and the drilling fluid flow rate. Taking these factors into account, a study was conducted at Tulsa University Drilling Research Projects' (TUDRP) large scale wellbore simulator to experimentally determine the cleaning efficiency of a Mechanical Cleaning Device (MCD). From the database generated through the experiments, correlations were obtained by performing regression modeling to extend the results to field applications. These correlations are based on dimensionless parameters and predict reasonably accurately the in-situ cuttings concentration when the MCD is installed in the drill string. The results are useful for designing of the optimal hydraulic program for extended reach, high angle and horizontal wells.
Access status: Restricted ,
Aplikacja optymalizująca dobór sekcji rur okładzinowych dla kryterium minimalnego kosztu
(Data obrony: 2019-01-24) Łopata, Paweł
Wydział Geologii, Geofizyki i Ochrony Środowiska
Praca zawiera opis projektowania i implementacji interfejsu oprogramowania aplikacji (API) oraz aplikacji webowej klienta, których zadaniem jest umożliwienie wykonywania obliczeń wytrzymałościowych kolumn rur okładzinowych podczas procesu projektowania otworu wiertniczego. Rezultatem działania programów jest wyznaczenie optymalnego pod kątem najniższego kosztu schematu zarurowania otworu wiertniczego, przy jednoczesnym spełnieniu wymagań wytrzymałościowych. Do zaimplementowania aplikacji zastosowano platformę deweloperską .NET Core oraz platformę chmurową Microsoft Azure. W pracy przedstawione są zastosowane narzędzie, technologie, opis działania aplikacji oraz możliwości dalszego rozwoju.
Access status: Open Access ,
Comparative analysis of technological efficiency of oil production intensification in carbonate collector. Advantages of the technology of radial drilling
(2015) Ziaja, Jan; Movčan, Vasil'
The paper presents a comparative analysis of the results of radial drilling, drilling perforation, cumulative reperforation and acid treatment. The study was focused at carbonate deposits in Russia. For each technology average incremental oil rates were estimated at the same exploration targets. The analysis of technological effectiveness in the given geologic and physical conditions revealed that drilling perforation and radial drilling allow reaching higher incremental oil rates compared to acid treatment and cumulative perforation. This fact confirms effectiveness of drilling radial canals by enlarging infiltration area. For the sake of completion radial drilling and drilling perforation are performed in the same wells. To reveal limiting conditions of applying radial drilling and drilling perforation an effectiveness analysis is made depending on the thickness of the interlayers exposed. To formulate criteria of radial exposing applicability an analysis of effects of different geological and physical formation parameters on geological and engineering operations effectiveness is done. The following parameters are considered: relation between the current formation pressure and initial formation pressure, formation permeability, skin factor, thickness of interlayers in overall perforation interval, thickness of interlayers exposed by radial canals.
Access status: Open Access ,
Deep well coring of oil and natural gas wells
(2008) Pinka, Ján; Wittenberger, Gabriel
Coring is a drilling-technical operation which allows integral sampling of the drilled rock - a so-called core. The core is the highest quality part of material documentation of the well. Based on technical equipment used for coring, and based on a chosen coring technology, we can get mechanically undamaged core (or in physically unaffected condition). Individual techniques and technologies allow core-sampling of various types of rocks.
Access status: Open Access ,
Design and construction of a magneto-rheometer to determine the rheological properties of magnetorheological fluids for use in drilling applications
(2012) Chatzistamou, Vasiliki C.
Magnetorheological (MR) fluids are suspensions which exhibit a rapid, continuous and reversible change in their rheological properties upon application of an external magnetic field. They consist of micron-sized magnetizable solid particles suspended in a non-magnetic carrier fluid. The dispersed phase can be ferromagnetic, ferrimagnetic, and paramagnetic materials while the carrier fluid can be water, kerosene or mineral oil. The main drawback of this kind of fluids is the sedimentation and settling of the magnetic microparticles due to the high mismatch density, so the addition of surfactants is essential. When no magnetic field is applied the suspensions of magnetizable particles are randomly distributed, so the fluids behave similarly to a Newtonian fluid. Under the influence of magnetic field the particles form chains aligned with the field direction and this causes the MR fluid to exhibit semisolid behavior, with increased yield stress. The yield stress, ranges between 10 and 100 kPa proportionally to the magnetic field, the percentage of the solids in the fluid and their particle size. The rheology is described by non-Newtonian models such as Bingham plastic or Herschel-Bulkley model. To study the effect of the different components of the MR fluids on the rheology of the suspensions, a flexible and innovative magneto-rheometer has been designed and fabricated in the laboratory. It consists of a vertical pipe running across a magnetic field created by an electromagnet. The system is equipped with a coriolis flowmeter and three pressure transmitters. The flow is provided by a peristaltic pump. The pipes which carry the fluid are non-magnetic. The parameters which are monitored are flow rate, density, temperature, pressure, pressure drop and magnetic flux. The rheological properties of the MR fluids in the homogenous magnetic field perpendicular to the shear flow direction are evaluated under different flow conditions like flow rate, different additives and solid loading and different strength of magnetic field. The data can be analyzed via a data acquisition system and a personal computer.
Access status: Open Access ,
Doświadczenia związane z budową poligonu badawczego dla niskoenergetycznych źródeł energii uzyskiwanych z górotworu na terenie VSB - Uniwersytet Techniczny W Ostrawie-Porubie
(2011) Bujok, Petr; Klempa, Martin; Koziorek, Jiři; Rado, Robert
During realization and operating of Research Polygons in areas of VSB - Technical University of Ostrava and AGH Kraków authors took many experiences which can be used for next construction of similar. This article will discuss experiences from realization and construction of the Large Research Polygon near the building Nova Aula (the biggest building in the Czech Republic which use heat pumps) and Small Research Polygon near the building Research Energetic Centrum, both in campus of VSB - Technical University of Ostrava, and also the results of the similar research polygon situated in the area of Drilling, Oil-Gas Faculty AGH Kraków.
Access status: Open Access ,
Drilling large diameter intake wells with cutter bits in loose and weakly consolidated rocks
(2016) Macuda, Jan; Macuda, Małgorzata
Most of the useful aquifers in Poland occur in the Quaternary and Tertiary horizons, which are deposited at a depth of tens to hundreds of meters. Owing to the need of providing large quantities of water for municipal and industrial purposes, the aquifers are more and more frequently opened with large diameter wells of various designs. Such wells are mostly drilled with the rotary method with reverse mud circulation with the use of various bits. The Quaternary and Tertiary strata abound in loose and weakly consolidated rocks therefore cutter bits are predominantly used. They allow for high rates of drilling and shorter time of drilling of the well. This significantly influences the negative influence of drilling mud on the near screen zone of the aquifer and better hydraulic properties of the well. Drillability tests were performed with cutter bits of 0.86 and 0.67 m diameter for providing high rates of drilling of large diameter intake wells in loose and weakly consolidated rocks. The research was made for measurement sections 0.5 to 1.0 m long, and each of them was drilled at con- stant rotational velocity and axial weight on bit. Prior to the drillability tests the limitation of weight on bit and rotational velocity of bit imposed by the technical characteristic of Prakla B50 rig, strength of the string and butter bit were established. Various regression models were analyzed for the sake of finding a dependence between drilling rate and axial weight on bit and rotational velocity of bit for particular macroscopically homogeneous layers. The best results were obtained for the exponent model illustrating the influence of axial weight on bit and rotational velocity of bit on the drilling rate, which has been proved by the calculated regression coefficients and statistical parameters.
Access status: Open Access ,
ECD optimization with specially designed low rheology drilling fluids
(2017) Wiśniowski, Rafał; Skrzypaszek, Krzysztof; Kiebzak, Piotr
This article presents a method in which low rheology drilling muds are used as a solution for demand ing wellbore pressure management and high Equivalent Circulating Density (ECD) values. In order to investigate this problem series of numerical simulations were conducted. 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. In order to check and confirm the program’s results accuracy, the outcomes were compared with pressure while drilling (PWD) equipment surveys results made during drilling operations. Next, simulations were made in order to check how low rheology parameters of drilling muds will impact overall ECD values. Additionally in the article are included field tests results from Hibernia Platform, prepared by Bolivar, Joung et al. in 2007 where specially treated (TMSB) low rheology drilling fluids was used to mitigate lost circulation issues and extensive ECD values. Both researches’ results indicate that low rheology drilling muds may solve ECD optimization problems while still maintaining required properties and executing tasks of drilling fluids.
Access status: Open Access ,
Environmental friendly drilling fluid management offshore Norway
(2014) Bilstad, Torleiv; Jensen, B.; Toft, Martin
Types and amount of fluids utilized when drilling a well determine to which extent the drilled cuttings are legally considered hazardous waste. The main categories of drilling fluids are oil based (OBM), water based (WBM) and synthetic based mud (SBM). The purpose of adding fluids to the drilling operations is to cool and lubricate the drill bit, to stabilize the well bore, to control subsurface pressure, to control formation pressure, to control well stability. to control corrosion, and to carry cuttings to the surface. Historically, cuttings from drilling sub-surface wells have been depositeddirectly from the platform to the seabed. However, environmental laws and regulations for the Norwegian offshore sector prohibit such practice when the oil on cutting exceeds 1 % by weight. Re-injection of cuttings as a slurry into subsurface formations is still practiced. Due to migration, leaks, re-entering of slurry onto the seabed, and collapsing formations this disposal method is on a decline. Transport of oily cuttings to shore for final treatment is the preferred Norwegian practice. However, cutting treatment on platforms is also continuousl yevaluated. For logistics and cost reasons, as well as health, safety and environmental (HSE) and working environment reasons, emphasis is put on offshore waste minimization, reuse and recycle.Ten onshore locations in Norway are currently receiving cuttings for further treatment and fluid recovery. The treated cuttings are for the most part disposed in landfills.
Access status: Open Access ,
Graphene and graphene oxide in the oil and gas industry
(Wydawnictwa AGH, 2017) Jamrozik, Aleksandra
Presently, nanotechnology and nanomaterials have found a number of applications in drilling, exploration and production (E&P) works, as well as in the area of refinery and distribution of crude oil and natural gas. Nanomaterials enjoy considerable popularity owing to their new and unique features which differentiate them from classical materials. Graphene is a relatively new material. Currently it occupies the seventh position among the most commonly used nanomaterials in oil and gas industry. This paper presents the properties graphene and graphene oxide and gives an insight into the applicability of graphene and graphene oxide in the oil and gas industry.
Access status: Open Access ,
Influence of low frequency vibrations on drillstring dynamics
(2014) Černova, Miroslava Êvgenìïvna
During the drilling process, between the drilling bit that ruins the rock in the bottom-hole and the energy source located on the ground surface is the drillstring that has certain length and small cross cuts that define the dynamics of the drilling bit work. Along with the development of science, for optimization of drilling processes were developed and continue to be elaborated mathematical models that use empirical dependencies based mainly on laboratory data which are very far away from the real conditions of well construction and fail to take into account all the peculiarities of this process. Thus, the management of the drillstring dynamics related to an increase in the effectiveness of deep directional and horizontal wells drilling process through the minimization of torsional and longitudinal low frequency vibrations of drilling instrument is a matter of topical interest nowadays.