Journal : AGH Drilling, Oil, Gas
Article : Efficiency of drilling large diameter wells with cutter bits on Szczerców opencast

Authors :
Turkiewicz, A
Oil and Gas Institute, Kraków, Poland,
Brzeszcz, J.
Oil and Gas Institute, Kraków, Poland,
Witek, W.
Witek Engineering Services,
Kapusta, P.
Oil and Gas Institute, Kraków, Poland,
Freidenberger, C. G.
National Technological University, Bahia Blanca, Argentina, cristianfreidenberger@hotmail.com,
Śliwa, T.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Krakow, Poland, sliwa@agh. edu.pl,
Włodek, T.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Łaciak, M.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Kosowska, K.
Jagiellonian University, Faculty of International and Political Studies, Kraków, Poland,
Kosowski, P.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Ziaja, J.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Movchan, V.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Sapińska-Śliwa, A.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Wiśniowski, R.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Korzec, M.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland, Student Scientific Association “GEOWIERT”,
Gajdosz, A.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Śliwa, T.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Kondrat, O.
Petroleum Engineering Institute, Ivano-Frankivsk National Technical University of Oil and Gas, Development and Operation of Oil and gas Fields Department, Ivano-Frankivsk, 15, Karpatska str., alexkondratr@gmail.com,
Volynskyy, D.
Ivano-Frankivsk National Technical University of Oil and Gas, Ivano-Frankivsk, 15, Karpatska Str, dmytro.volynskyy@gmail.com,
Falkowicz, S.
Oil and Gas Institute – National Research Institute, Kraków, Poland,
Cicha-Szot, R.
Oil and Gas Institute – National Research Institute, Kraków, Poland,
Dubiel, S.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland,
Launt, P.
RAM Biochemicals, Inc., NC, USA,
Nelson, S.
RAM Biochemicals, Inc., NC, USA,
Wójcicki, W.
Polskie Górnictwo Naftowe i Gazownictwo SA, Warsaw, Poland,
Rogaliński, M.
Polskie Górnictwo Naftowe i Gazownictwo SA, Warsaw, Poland,
Şuţoiu, F.
SNGN ROMGAZ SA,
Foidaş, I.
SNGN ROMGAZ SA,
Avramescu, M.
SNGN ROMGAZ SA,
Laura, A.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Krakow, Poland,
Pinka, J.
The Technical University of Kosice, Faculty of Mining, Ecology, Process Control and Geotechnology,
Kucirkova, L.
The Technical University of Kosice, Faculty of Mining, Ecology, Process Control and Geotechnology,
Nowakowski, A.
GAZ-SYSTEM S.A., Warsaw, Poland,
Paszylk, P.
GAZ-SYSTEM S.A., Warsaw, Poland,
Macuda, J.
AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Krakow, Poland,
Abstract : Drilling of large diameter wells to be used for dewatering of lignite deposits is inefficient due to the presence of large packages of loose Quaternary and Tertiary strata. Moreover, considerable dewatering of the rock mass favors serious complications and drilling break-downs connected with the sliding of wellbore walls. Accordingly, new technical and technological solutions, which enable faster drilling, are searched for. In this way the time of operation of drilling mud on the near-wellbore zone can be shortened and the safety of drilling works increased. For the sake of obtaining higher rates of drilling in large diameter dewatering wellbores a new cutter bit 0.96 m of diameter was designed. Drillability tests in industrial conditions followed. These tests were performed in separated, loose and low-compaction, macroscopically homogeneous rocks of similar drillability. The tests were performed on selected sections 0.3 to 1.0 m long, and each of the sections was drilled at constant rotational velocity and weight on bit. Prior to these tests there were established limitations regarding weight on bit and rotational velocity of the bit, in reference to the technical characteristic of the rig, strength of the string and the cutter bit. Two different regression models were considered to find a dependence of mechanical drilling rate on weight on bit and rotational velocity of the bit for selected macroscopically homogeneous strata. The most favorable results were obtained for a power model representing impact of axial stress and rotational velocity of the bit on the drilling rate. They have been confirmed by calculated regression coefficients and statistical parameters. Industrial tests were performed to assess the efficiency of drilling large diameter dewatering wells with a cutter bit of 0.96 m diameter on the basis of the presented model of average drilling rate. The results for the average drilling rate turned out to be much higher than the ones obtained so far.

Keywords : drilling of wells, cutter bit, dewatering of rock mass, lignite,
Publishing house : Wydawnictwa AGH
Publication date : 2015
Number : Vol. 32, no. 2
Page : 405 – 413

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DOI :
Qute : Turkiewicz, A ,Brzeszcz, J. ,Witek, W. ,Kapusta, P. ,Freidenberger, C. G. ,Śliwa, T. ,Włodek, T. ,Łaciak, M. ,Kosowska, K. ,Kosowski, P. ,Ziaja, J. ,Movchan, V. ,Sapińska-Śliwa, A. ,Wiśniowski, R. ,Korzec, M. ,Gajdosz, A. ,Śliwa, T. ,Kondrat, O. ,Volynskyy, D. ,Falkowicz, S. ,Cicha-Szot, R. ,Dubiel, S. ,Launt, P. ,Nelson, S. ,Wójcicki, W. ,Rogaliński, M. ,Şuţoiu, F. ,Foidaş, I. ,Avramescu, M. ,Laura, A. ,Pinka, J. ,Kucirkova, L. ,Nowakowski, A. ,Paszylk, P. ,Macuda, J. ,Macuda, J. , Efficiency of drilling large diameter wells with cutter bits on Szczerców opencast. AGH Drilling, Oil, Gas Vol. 32, no. 2/2015
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