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Experimental study on shale-breaking of special-shaped cutter PDC bit
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesTo enhance the drilling efficiency and extend the service life of PDC (Polycrystalline Diamond Composite) bits in shale formations, this study delves into the rock-breaking mechanisms of special-shaped cutters through a comprehensive experimental ...
Chunliang Zhang +2 more
exaly +3 more sources
Numerical studies on rock breaking of single axe-shaped PDC cutter
Journal of Physics: Conference Series, 2023 Abstract For a drill bit, the cutter is the most important part to break the rock. In oilwell drilling, polycrystalline diamond compact (PDC) bit is widely used to shear the rock formation. In this paper, a finite element model with including the axe-shaped PDC cutter and rock formation is developed to study the rock breaking behaviours.
Jianlin Yao, Wei Zhang, Bin Liu
exaly +2 more sources
Shiyou jixieIn drilling engineering， optimized cutter selection for specific formations is critical to enhance rock breaking efficiency. To this end， a Split Hopkinson Pressure Bar （SHPB） apparatus was used to conduct impact-induced rock breaking tests of triangular-
Li Yunzhu +6 more
doaj +4 more sources
Investigation of the impact of land use management scenarios on diffuse source nutrients in the River Axe catchment [PDF]
, 2007 The Water Framework Directive (WFD) (Directive 2000/60/EC) requires new ecological standards for rivers, lakes and coastal waters by 2015. In the United Kingdom the English Catchment Sensitive Farming Initiative has identified 40 catchments which are ...
Glavan, Matjaz
core +7 more sources
Energies, 2022 The Permian igneous rock in Shunbei Oilfield exhibits high rock strength, which results in a low rate of penetration (ROP) and shortens the cutter’s service life. It is necessary to analyze and evaluate the rock breaking effect of cutters.
Zhuoxin Dong +6 more
doaj +1 more source
Rock Breaking Mechanism and Experimental Study of Axe-shaped PDC Cutter
Shiyou jixie, 2022 Axe-shaped PDC cutter has more obvious rock breaking advantage than conventional PDC cutter. In order to analyze the rock breaking mechanism of the axe-shaped PDC cutter, the finite element simulation and test were used to conduct comparison and force ...
Zou Deyong +3 more
doaj
Numerical simulation on fragmentation of heterogeneous granite by axe-shaped PDC cutter
Jin'gangshi yu moliao moju gongchengObjectivesPolycrystalline diamond compact (PDC) bits are extensively utilized in the drilling industry. However, conventional PDC cutters are prone to failure when drilling through granite formations, leading to reduced drilling efficiency.
Jiajun LU +4 more
doaj +3 more sources
, 2022 References: Briggs, C. S. "Double Axe Doubts", Antiquity, vol. 47, no. 188, 1973, pp. 318; Rouse, W. H. D. “The Double Axe and the Labyrinth”, The Journal of Hellenic Studies, vol. 21, 1901, pp.
Centre for Ancient Cultures Museum (11646676)
core +1 more source
Numerical Simulation Study on Characteristics of Tight Hard Sand Broken by Axe-shaped PDC Cutter
Shiyou jixie, 2021 The study on the specific rock breaking mechanism of axe-shaped PDC cutter in the existing literatures is relatively less, the rock breaking characteristic test data are mostly for field application data, and there is short of theoretical basis of tooth ...
Zhao Runqi +5 more
doaj
Correlation between machining direction, cutter geometry and step-over distance in 3-axis milling: Application to milling by zones. [PDF]
, 2012 Computer-Aided Manufacturing (CAM) occupies an increasingly important role in engineering with all it has to offer in terms of new possibilities and improving designer/manufacturer productivity. The present study addresses machining of free-form surfaces
Senatore, Johanna +3 more
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