The Experts below are selected from a list of 51 Experts worldwide ranked by ideXlab platform
Ferri Hassani - One of the best experts on this subject based on the ideXlab platform.
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drilling signals analysis for Tricone Bit condition monitoring
International journal of mining science and technology, 2021Co-Authors: Hamed Rafezi, Ferri HassaniAbstract:Abstract This paper presents a novel approach to investigate the relations between drilling signals and Bit wear condition in real world full-scale mining operations. This research addresses the increasing demand for automation in mining to increase the efficiency, safety, and ability to work in harsh environments. A crucial issue in fully autonomous unmanned drilling is to have a system to detect the Bit wear condition through the drilling signals analysis in real time. In this work, based on extensive field studies, a novel qualitative method for Tricone Bit wear state classification is developed and introduced. The relations between drilling vibration as well as electric motor current signals and Bit wear are investigated and Bit failure vibration frequencies, regardless of the geological conditions, are introduced. Bit failure frequencies are experimentally investigated and analytically calculated. Finally, the effect of Bit design parameters on the failure frequencies is presented for the application of Bit wear condition monitoring and Bit failure prediction.
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Tricone Bit health monitoring using wavelet packet decomposed vibration signal
2018 5th International Conference on Control Decision and Information Technologies (CoDIT), 2018Co-Authors: Hamed Rafezi, Ferri HassaniAbstract:This paper presents part of a research work developing an automated Bit failure prediction system for drilling applications. The approach relies on analysis of vibration signals generated as a result of Bit-ground interactions. Extensive full-scale in-situ tests have been accomplished in participating Canadian mine sites. A high-frequency data acquisition unit was installed in the control cabin of a blasthole drill unit to collect the vibration signal from several accelerometers placed on different spots of the rig. The vibration signals collected from the drill mast were analyzed in time and frequency domains and the frequency pattern produced by worn Bit is achieved. The frequency ranges of vibration signal those are affected by Bit wear are investigated. An Artificial Intelligence (AI) classifier is being designed to perform the automated Bit condition classification based on selected signal features. For this purpose, a time-frequency representation of the vibration signal is achieved by application of Wavelet Packet Decomposition (WPD). This research final outcomes will enable mining operations to improve drilling performance by detection of Bit wear status and prediction of the Bit catastrophic failure to avoid additional costs and delays for the production.
Yahiaoui Malik - One of the best experts on this subject based on the ideXlab platform.
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Comportement tribologique de diamants polycristallins et de carbures cémentés WC-Co avec traitements de graduation : application aux inserts et taillants d'outils pour le forage de formations rocheuses fortement abrasives.
École Doctorale Sciences de la Matière (Toulouse);154236152, 2013Co-Authors: Yahiaoui MalikAbstract:La performance des inserts d’outils tricône et des taillants d’outils PDC commerciaux est soumise au compromis dureté/ténacité principalement régi par la proportion de cobalt et la taille des grains de carbures cémentés WC-Co et du PDC. Les traitements de graduation basés sur l’imbiBition de cobalt et les revêtements de nitrure de bore des carbures cémentés permettent d’augmenter la résistance à l’abrasion au niveau de la surface active des inserts et des taillants tout en générant une ténacité accrue au cœur des carbures cémentés. Des essais d’usure à l’aide d’un tribomètre rotatif avec une contreface en alumine pour les inserts WC-Co et à l’aide d’un tour d’usure avec une contreface en béton à forte teneur en silice pour les taillants ont permis d’étudier leur comportement tribologique. Pour les inserts, le coefficient de frottement et les cinétiques d’usure (modèle d’Archard), mais aussi l’évaluation de la température de contact et de l’émission acoustique générée au contact, ont permis de mieux comprendre l’effet des traitements réalisés sur les carbures cémentés. Pour les taillants PDC un modèle de qualité, basé sur un compromis usure/efficacité de coupe, a été développé afin de caractériser la résistance à l’usure des taillants. Des analyses physicochimiques (EDX, DRX, Raman) ont permis d’associer l’évaluation de la résistance à l’abrasion des échantillons à des mécanismes d’usure en considérant les éléments constitutifs des systèmes tribologiques et la formation de troisièmes corps. Les résultats ont ainsi montré l’importance de la proportion de cobalt générée dans les déBits d’usure sur la stabilité des débris abrasifs (alumine et silice) et ainsi sur la résistance à l’usure des inserts et taillants. Les mécanismes de rupture des microstructures WC-Co et PDC sont aussi mis en avant afin d’expliquer leur influence sur la résistance à l’abrasion des échantillons. Enfin, des mesures de ténacité des inserts ont permis de juger de l’apport des traitements d’imbiBition sur la résistance à la propagation de fissures des carbures cémentés WC-Co. Aussi, des essais complémentaires de chocs ont permis de montrer que les traitements améliorant la résistance à l’abrasion des taillants ne se traduisent pas par la chute de leur résistance aux chocs. ABSTRACT : The performance of commercial Tricone Bit inserts and PDC Bit cutters is defined by the compromise between hardness and fracture toughness controlled by the cobalt proportion and the grain size of WC-Co cemented carbide and PDC. On one hand, graduation treatments based on reactive imbiBition of cobalt and boron nitride coating of cemented carbides lead to an improvement of abrasive wear resistance of inserts and cutters active surfaces. On the other hand, greater fracture toughness is obtained in the cemented carbides core as a result of imbiBition. Wear experiments were performed with a rotary tribometer using an alumina contreface for the WC-Co inserts and with a lathe and its silica based concrete contreface for the PDC cutters. For the inserts, the friction coefficient and wear kinetics (Archard model), but also contact temperature measurement and acoustic emission consideration, permitted to clarify the treatments effects on cemented carbides tribological behaviour. For PDC cutters, a quality model, based on wear/cutting efficiency compromise, was developed in order to characterize the wear resistance. Physicochemical analyses (EDX, XRD, Raman) made a link between mechanical results and wear mechanisms considering the tribological systems and the third body formation. These analyses highlighted the influence of the proportion of cobalt generated in the wear flows on the stability of abrasive debris (alumina and silica) and thus on the wear resistance of inserts and cutters. The Fracture mechanisms of WC-Co and PDC microstructures have also been studied and their effects on the wear resistance have been demonstrated here. At last, fracture toughness measurements showed that the imbiBition treatments could maintain a good resistance to cracks propagation of inserts. In addition, complementary impacts experiments prove that the improvement of wear resistance of PDC cutters did not produce reduction of impact strengt
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Tribological behaviour of polycrystalline diamonds and graded cemented carbides WC-Co : application to drill Bits inserts and cutters for the drilling of abrasives rock formations.
2013Co-Authors: Yahiaoui MalikAbstract:La performance des inserts d’outils tricône et des taillants d’outils PDC commerciaux est soumise au compromis dureté/ténacité principalement régi par la proportion de cobalt et la taille des grains de carbures cémentés WC-Co et du PDC. Les traitements de graduation basés sur l’imbiBition de cobalt et les revêtements de nitrure de bore des carbures cémentés permettent d’augmenter la résistance à l’abrasion au niveau de la surface active des inserts et des taillants tout en générant une ténacité accrue au cœur des carbures cémentés. Des essais d’usure à l’aide d’un tribomètre rotatif avec une contreface en alumine pour les inserts WC-Co et à l’aide d’un tour d’usure avec une contreface en béton à forte teneur en silice pour les taillants ont permis d’étudier leur comportement tribologique. Pour les inserts, le coefficient de frottement et les cinétiques d’usure (modèle d’Archard), mais aussi l’évaluation de la température de contact et de l’émission acoustique générée au contact, ont permis de mieux comprendre l’effet des traitements réalisés sur les carbures cémentés. Pour les taillants PDC un modèle de qualité, basé sur un compromis usure/efficacité de coupe, a été développé afin de caractériser la résistance à l’usure des taillants. Des analyses physicochimiques (EDX, DRX, Raman) ont permis d’associer l’évaluation de la résistance à l’abrasion des échantillons à des mécanismes d’usure en considérant les éléments constitutifs des systèmes tribologiques et la formation de troisièmes corps. Les résultats ont ainsi montré l’importance de la proportion de cobalt générée dans les déBits d’usure sur la stabilité des débris abrasifs (alumine et silice) et ainsi sur la résistance à l’usure des inserts et taillants. Les mécanismes de rupture des microstructures WC-Co et PDC sont aussi mis en avant afin d’expliquer leur influence sur la résistance à l’abrasion des échantillons. Enfin, des mesures de ténacité des inserts ont permis de juger de l’apport des traitements d’imbiBition sur la résistance à la propagation de fissures des carbures cémentés WC-Co. Aussi, des essais complémentaires de chocs ont permis de montrer que les traitements améliorant la résistance à l’abrasion des taillants ne se traduisent pas par la chute de leur résistance aux chocs.The performance of commercial Tricone Bit inserts and PDC Bit cutters is defined by the compromise between hardness and fracture toughness controlled by the cobalt proportion and the grain size of WC-Co cemented carbide and PDC. On one hand, graduation treatments based on reactive imbiBition of cobalt and boron nitride coating of cemented carbides lead to an improvement of abrasive wear resistance of inserts and cutters active surfaces. On the other hand, greater fracture toughness is obtained in the cemented carbides core as a result of imbiBition. Wear experiments were performed with a rotary tribometer using an alumina contreface for the WC-Co inserts and with a lathe and its silica based concrete contreface for the PDC cutters. For the inserts, the friction coefficient and wear kinetics (Archard model), but also contact temperature measurement and acoustic emission consideration, permitted to clarify the treatments effects on cemented carbides tribological behaviour. For PDC cutters, a quality model, based on wear/cutting efficiency compromise, was developed in order to characterize the wear resistance. Physicochemical analyses (EDX, XRD, Raman) made a link between mechanical results and wear mechanisms considering the tribological systems and the third body formation. These analyses highlighted the influence of the proportion of cobalt generated in the wear flows on the stability of abrasive debris (alumina and silica) and thus on the wear resistance of inserts and cutters. The Fracture mechanisms of WC-Co and PDC microstructures have also been studied and their effects on the wear resistance have been demonstrated here. At last, fracture toughness measurements showed that the imbiBition treatments could maintain a good resistance to cracks propagation of inserts. In addition, complementary impacts experiments prove that the improvement of wear resistance of PDC cutters did not produce reduction of impact strengt
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Comportement tribologique de diamants polycristallins et de carbures cémentés WC-Co avec traitements de graduation (application aux inserts et taillants d'outils pour le forage de formations rocheuses fortement abrasives.)
INPT Toulouse, 2013Co-Authors: Yahiaoui Malik, Denape JeanAbstract:La performance des inserts d outils tricône et des taillants d outils PDC commerciaux est soumise au compromis dureté/ténacité principalement régi par la proportion de cobalt et la taille des grains de carbures cémentés WC-Co et du PDC. Les traitements de graduation basés sur l imbiBition de cobalt et les revêtements de nitrure de bore des carbures cémentés permettent d augmenter la résistance à l abrasion au niveau de la surface active des inserts et des taillants tout en générant une ténacité accrue au cœur des carbures cémentés. Des essais d usure à l aide d un tribomètre rotatif avec une contreface en alumine pour les inserts WC-Co et à l aide d un tour d usure avec une contreface en béton à forte teneur en silice pour les taillants ont permis d étudier leur comportement tribologique. Pour les inserts, le coefficient de frottement et les cinétiques d usure (modèle d Archard), mais aussi l évaluation de la température de contact et de l émission acoustique générée au contact, ont permis de mieux comprendre l effet des traitements réalisés sur les carbures cémentés. Pour les taillants PDC un modèle de qualité, basé sur un compromis usure/efficacité de coupe, a été développé afin de caractériser la résistance à l usure des taillants. Des analyses physicochimiques (EDX, DRX, Raman) ont permis d associer l évaluation de la résistance à l abrasion des échantillons à des mécanismes d usure en considérant les éléments constitutifs des systèmes tribologiques et la formation de troisièmes corps. Les résultats ont ainsi montré l importance de la proportion de cobalt générée dans les déBits d usure sur la stabilité des débris abrasifs (alumine et silice) et ainsi sur la résistance à l usure des inserts et taillants. Les mécanismes de rupture des microstructures WC-Co et PDC sont aussi mis en avant afin d expliquer leur influence sur la résistance à l abrasion des échantillons. Enfin, des mesures de ténacité des inserts ont permis de juger de l apport des traitements d imbiBition sur la résistance à la propagation de fissures des carbures cémentés WC-Co. Aussi, des essais complémentaires de chocs ont permis de montrer que les traitements améliorant la résistance à l abrasion des taillants ne se traduisent pas par la chute de leur résistance aux chocs.The performance of commercial Tricone Bit inserts and PDC Bit cutters is defined by the compromise between hardness and fracture toughness controlled by the cobalt proportion and the grain size of WC-Co cemented carbide and PDC. On one hand, graduation treatments based on reactive imbiBition of cobalt and boron nitride coating of cemented carbides lead to an improvement of abrasive wear resistance of inserts and cutters active surfaces. On the other hand, greater fracture toughness is obtained in the cemented carbides core as a result of imbiBition. Wear experiments were performed with a rotary tribometer using an alumina contreface for the WC-Co inserts and with a lathe and its silica based concrete contreface for the PDC cutters. For the inserts, the friction coefficient and wear kinetics (Archard model), but also contact temperature measurement and acoustic emission consideration, permitted to clarify the treatments effects on cemented carbides tribological behaviour. For PDC cutters, a quality model, based on wear/cutting efficiency compromise, was developed in order to characterize the wear resistance. Physicochemical analyses (EDX, XRD, Raman) made a link between mechanical results and wear mechanisms considering the tribological systems and the third body formation. These analyses highlighted the influence of the proportion of cobalt generated in the wear flows on the stability of abrasive debris (alumina and silica) and thus on the wear resistance of inserts and cutters. The Fracture mechanisms of WC-Co and PDC microstructures have also been studied and their effects on the wear resistance have been demonstrated here. At last, fracture toughness measurements showed that the imbiBition treatments could maintain a good resistance to cracks propagation of inserts. In addition, complementary impacts experiments prove that the improvement of wear resistance of PDC cutters did not produce reduction of impact strengthTOULOUSE-INP (315552154) / SudocSudocFranceF
Hamed Rafezi - One of the best experts on this subject based on the ideXlab platform.
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drilling signals analysis for Tricone Bit condition monitoring
International journal of mining science and technology, 2021Co-Authors: Hamed Rafezi, Ferri HassaniAbstract:Abstract This paper presents a novel approach to investigate the relations between drilling signals and Bit wear condition in real world full-scale mining operations. This research addresses the increasing demand for automation in mining to increase the efficiency, safety, and ability to work in harsh environments. A crucial issue in fully autonomous unmanned drilling is to have a system to detect the Bit wear condition through the drilling signals analysis in real time. In this work, based on extensive field studies, a novel qualitative method for Tricone Bit wear state classification is developed and introduced. The relations between drilling vibration as well as electric motor current signals and Bit wear are investigated and Bit failure vibration frequencies, regardless of the geological conditions, are introduced. Bit failure frequencies are experimentally investigated and analytically calculated. Finally, the effect of Bit design parameters on the failure frequencies is presented for the application of Bit wear condition monitoring and Bit failure prediction.
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Tricone Bit health monitoring using wavelet packet decomposed vibration signal
2018 5th International Conference on Control Decision and Information Technologies (CoDIT), 2018Co-Authors: Hamed Rafezi, Ferri HassaniAbstract:This paper presents part of a research work developing an automated Bit failure prediction system for drilling applications. The approach relies on analysis of vibration signals generated as a result of Bit-ground interactions. Extensive full-scale in-situ tests have been accomplished in participating Canadian mine sites. A high-frequency data acquisition unit was installed in the control cabin of a blasthole drill unit to collect the vibration signal from several accelerometers placed on different spots of the rig. The vibration signals collected from the drill mast were analyzed in time and frequency domains and the frequency pattern produced by worn Bit is achieved. The frequency ranges of vibration signal those are affected by Bit wear are investigated. An Artificial Intelligence (AI) classifier is being designed to perform the automated Bit condition classification based on selected signal features. For this purpose, a time-frequency representation of the vibration signal is achieved by application of Wavelet Packet Decomposition (WPD). This research final outcomes will enable mining operations to improve drilling performance by detection of Bit wear status and prediction of the Bit catastrophic failure to avoid additional costs and delays for the production.
Arnis Judzis - One of the best experts on this subject based on the ideXlab platform.
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Optimization of Mud Hammer Drilling Performance--A Program to Benchmark the Viability of Advanced Mud Hammer Drilling
2006Co-Authors: Arnis JudzisAbstract:Operators continue to look for ways to improve hard rock drilling performance through emerging technologies. A consortium of Department of Energy, operator and industry participants put together an effort to test and optimize mud driven fluid hammers as one emerging technology that has shown promise to increase penetration rates in hard rock. The thrust of this program has been to test and record the performance of fluid hammers in full scale test conditions including, hard formations at simulated depth, high density/high solids drilling muds, and realistic fluid power levels. This paper details the testing and results of testing two 7 3/4 inch diameter mud hammers with 8 1/2 inch hammer Bits. A Novatek MHN5 and an SDS Digger FH185 mud hammer were tested with several Bit types, with performance being compared to a conventional (IADC Code 537) Tricone Bit. These tools functionally operated in all of the simulated downhole environments. The performance was in the range of the baseline ticone or better at lower borehole pressures, but at higher borehole pressures the performance was in the lower range or below that of the baseline Tricone Bit. A new drilling mode was observed, while operating the MHN5 mud hammer. This mode was noticed as the weight on Bit (WOB) was in transition from low to high applied load. During this new ''transition drilling mode'', performance was substantially improved and in some cases outperformed the Tricone Bit. Improvements were noted for the SDS tool while drilling with a more aggressive Bit design. Future work includes the optimization of these or the next generation tools for operating in higher density and higher borehole pressure conditions and improving Bit design and technology based on the knowledge gained from this test program
Denape Jean - One of the best experts on this subject based on the ideXlab platform.
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Comportement tribologique de diamants polycristallins et de carbures cémentés WC-Co avec traitements de graduation (application aux inserts et taillants d'outils pour le forage de formations rocheuses fortement abrasives.)
INPT Toulouse, 2013Co-Authors: Yahiaoui Malik, Denape JeanAbstract:La performance des inserts d outils tricône et des taillants d outils PDC commerciaux est soumise au compromis dureté/ténacité principalement régi par la proportion de cobalt et la taille des grains de carbures cémentés WC-Co et du PDC. Les traitements de graduation basés sur l imbiBition de cobalt et les revêtements de nitrure de bore des carbures cémentés permettent d augmenter la résistance à l abrasion au niveau de la surface active des inserts et des taillants tout en générant une ténacité accrue au cœur des carbures cémentés. Des essais d usure à l aide d un tribomètre rotatif avec une contreface en alumine pour les inserts WC-Co et à l aide d un tour d usure avec une contreface en béton à forte teneur en silice pour les taillants ont permis d étudier leur comportement tribologique. Pour les inserts, le coefficient de frottement et les cinétiques d usure (modèle d Archard), mais aussi l évaluation de la température de contact et de l émission acoustique générée au contact, ont permis de mieux comprendre l effet des traitements réalisés sur les carbures cémentés. Pour les taillants PDC un modèle de qualité, basé sur un compromis usure/efficacité de coupe, a été développé afin de caractériser la résistance à l usure des taillants. Des analyses physicochimiques (EDX, DRX, Raman) ont permis d associer l évaluation de la résistance à l abrasion des échantillons à des mécanismes d usure en considérant les éléments constitutifs des systèmes tribologiques et la formation de troisièmes corps. Les résultats ont ainsi montré l importance de la proportion de cobalt générée dans les déBits d usure sur la stabilité des débris abrasifs (alumine et silice) et ainsi sur la résistance à l usure des inserts et taillants. Les mécanismes de rupture des microstructures WC-Co et PDC sont aussi mis en avant afin d expliquer leur influence sur la résistance à l abrasion des échantillons. Enfin, des mesures de ténacité des inserts ont permis de juger de l apport des traitements d imbiBition sur la résistance à la propagation de fissures des carbures cémentés WC-Co. Aussi, des essais complémentaires de chocs ont permis de montrer que les traitements améliorant la résistance à l abrasion des taillants ne se traduisent pas par la chute de leur résistance aux chocs.The performance of commercial Tricone Bit inserts and PDC Bit cutters is defined by the compromise between hardness and fracture toughness controlled by the cobalt proportion and the grain size of WC-Co cemented carbide and PDC. On one hand, graduation treatments based on reactive imbiBition of cobalt and boron nitride coating of cemented carbides lead to an improvement of abrasive wear resistance of inserts and cutters active surfaces. On the other hand, greater fracture toughness is obtained in the cemented carbides core as a result of imbiBition. Wear experiments were performed with a rotary tribometer using an alumina contreface for the WC-Co inserts and with a lathe and its silica based concrete contreface for the PDC cutters. For the inserts, the friction coefficient and wear kinetics (Archard model), but also contact temperature measurement and acoustic emission consideration, permitted to clarify the treatments effects on cemented carbides tribological behaviour. For PDC cutters, a quality model, based on wear/cutting efficiency compromise, was developed in order to characterize the wear resistance. Physicochemical analyses (EDX, XRD, Raman) made a link between mechanical results and wear mechanisms considering the tribological systems and the third body formation. These analyses highlighted the influence of the proportion of cobalt generated in the wear flows on the stability of abrasive debris (alumina and silica) and thus on the wear resistance of inserts and cutters. The Fracture mechanisms of WC-Co and PDC microstructures have also been studied and their effects on the wear resistance have been demonstrated here. At last, fracture toughness measurements showed that the imbiBition treatments could maintain a good resistance to cracks propagation of inserts. In addition, complementary impacts experiments prove that the improvement of wear resistance of PDC cutters did not produce reduction of impact strengthTOULOUSE-INP (315552154) / SudocSudocFranceF
