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Drill-string horizontal dynamics with uncertainty on the frictional force
(Elsevier, 2013-01)
This paper analyzes the dynamics of a horizontal drill-string. In this dynamics, the frictional forces between the column and the borehole are relevant and uncertain. A stochastic model is proposed for the frictional ...
Identificação de fatores de risco em obras de HDD: uma revisão da literatura
(Universidade Federal do Rio Grande do NorteBrasilUFRNEngenharia Civil, 2021-04-08)
Horizontal Directional Drilling (HDD) is a tubing installation technology underground without the necessity for trenching. This technology is used in urban areas due to the reduced impact on traffic and activities around ...
Identification of lift-off mechanism failure for salt drill-in drilling fluid containing polymer filter cake through adsorption/desorption studies
(ELSEVIER SCIENCE BV, 2010)
Drilling fluid`s contact with the productive zone of horizontal or complex wells can reduce well productivity by fluid invasion in the borehole wall. Salted drilling drill-in fluid containing polymers has often been applied ...
Theoretical and experimental evaluation of the influence of the length of drill rods in the SPT-T test
(2010-01-01)
The influence of soil drill rod length on the N value in the SPT-T test has been studied extensively by Mello (1971), Schmertmann & Palacios (1979), Odebrecht et al. (2002) and Cavalcante (2002). This paper presents an ...
Theoretical and experimental evaluation of the influence of the length of drill rods in the SPT-T test
(2010-01-01)
The influence of soil drill rod length on the N value in the SPT-T test has been studied extensively by Mello (1971), Schmertmann & Palacios (1979), Odebrecht et al. (2002) and Cavalcante (2002). This paper presents an ...
Experimental evaluation of cuttings displacement by the drill bit-drill string assembly in a horizontal well
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia Mecânica e de MateriaisUTFPR, 2021-11-29)
Not only the oil production but also the well depths have been increasing over the years in Brazil. As a consequence, new techniques and technologies have been required by the industry in order to be able to extract the ...
Commentary on “T.G. Ritto, M.R. Escalante, Rubens Sampaio, M.B. Rosales, Drill-string horizontal dynamics with uncertainty on the frictional force, Journal of Sound and Vibration 332 (2013) 145-153”
(Academic Press Ltd - Elsevier Science Ltd, 2016-12-08)
The goal of this article is to clarify some points of the formulation presented in the “T.G. Ritto, M.R. Escalante, Rubens Sampaio, M.B. Rosales, Drill-string horizontal dynamics with uncertainty on the frictional force, ...
Análise experimental do arrasto em colunas de perfuração parcialmente imersas em leito de cascalhos
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia Mecânica e de MateriaisUTFPR, 2018-11-30)
The present work evaluated experimentally the drag’s force on a drill string, while it’s pulling out of horizontal well partially filled with cuttings bed. For accomplish this task, it was constructed an experimental unit ...