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- W2019385888 abstract "Drillstrings equipped with PDC bits are commonly used to drill for oil, gas and geothermal energy. Drillstring instability — defined as the tendency of self-excited vibrations (chatter) to grow with time — causes failure of PDC bits as well as pipe joints. This problem becomes particularly severe in deep wells and hard rock. Much work has been performed in predicting stability. Bit and drillstring geometry as well as rock type affect stability. In this paper, we propose a scheme to assure stability for a given drillstring regardless of bit geometry, utilizing the desired drilling parameters. The effect of bit geometry and rock type in the classic stability analysis are replaced by the drilling parameters, namely: weight-ob-bit (WOB), rate of penetration (ROP) and speed (RPM). Experimental data obtained at Sandia National Labs, Albuquerque, N.M. is used to verify the assured stability equation. This approach is much simpler that classic stability analysis." @default.
- W2019385888 created "2016-06-24" @default.
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- W2019385888 date "2003-01-01" @default.
- W2019385888 modified "2023-09-23" @default.
- W2019385888 title "Assured Stability of Drillstrings Equipped With Polycrystalline Diamond Compact (PDC) Bits" @default.
- W2019385888 doi "https://doi.org/10.1115/detc2003/vib-48620" @default.
- W2019385888 hasPublicationYear "2003" @default.
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