Results 211 to 220 of about 15,062 (254)
Study on automatic lithology identification method while drilling based on acoustic pressure-rock physics parameters mapping. [PDF]
PLoS OneJiang W +5 more
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PDC Bit Testing at Sandia Reveals Influence of Chatter in Hard-Rock Drilling
, 1999 David W. Raymond
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Modeling of Cutting Rock: From PDC Cutter to PDC Bit—Modeling of PDC Bit
SPE Journal, 2021Summary In this paper, we integrated our polycrystalline diamond compact (PDC) cutter model (Chen et al. 2021) into a PDC bit model that can predict the weight on bit (WOB), torque on bit (TOB), and imbalanced side force on a bit under given drilling conditions.
Pengju Chen +3 more
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IADC/SPE Drilling Conference, 1992
ABSTRACT The poor performance of PDC bits in harder formations is caused by downhole vibrations. However, proper operating conditions (i.e. low rotary speed and high weight on bit) and new technology for vibration control (anti-whirl PDC bits and a soft-torque rotary system) can successfully extend the application of PDC bits to harder ...
J. M. Hanson, W. R. Hansen
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ABSTRACT The poor performance of PDC bits in harder formations is caused by downhole vibrations. However, proper operating conditions (i.e. low rotary speed and high weight on bit) and new technology for vibration control (anti-whirl PDC bits and a soft-torque rotary system) can successfully extend the application of PDC bits to harder ...
J. M. Hanson, W. R. Hansen
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Modeling of Cutting Rock: From PDC Cutter to PDC Bit—Modeling of PDC Cutter
SPE Journal, 2021Summary The main purpose of this paper is to present our polycrystalline diamond compact (PDC) cutter model and its verification. The PDC cutter model we developed is focused on a PDC cutter cutting a rock in 3D space. The model studies the forces between a cutter and a rock and applies the theory of poroelasticity to calculate the ...
Pengju Chen +3 more
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Flexible Bit: A New Anti-Vibration PDC Bit Concept
SPE Annual Technical Conference and Exhibition, 1995ABSTRACT This paper introduces the novel concept of a "flexible" polycrystalline diamond compact (PDC) bit, and its capability to reduce detrimental vibration associated with drag bits. The tilt flexibility, introduced at the bit, decouples the dynamic motion of the bottom hole assembly (BHA) from that of the bit, thus providing a ...
P. M. Defourny, Fereidoun Abbassian
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Advanced Materials Research, 2013
On the rotary drilling system, the technologies for fracturing and cutting hard rock are mainly mechanical rock breaking methods by use of improving bottomhole water horse power and bit energy, and the working life and rock breaking efficiency have much room for improvement.
Zong Gang Wang, Zhen Wei, Lai Ju Han
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On the rotary drilling system, the technologies for fracturing and cutting hard rock are mainly mechanical rock breaking methods by use of improving bottomhole water horse power and bit energy, and the working life and rock breaking efficiency have much room for improvement.
Zong Gang Wang, Zhen Wei, Lai Ju Han
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Bit Balling Mitigation in PDC Bit Design
IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, 2008Abstract Historically, parameters like junk slot area (JSA), face volume (FV) and hydraulic horsepower per square inch of bit area (HSI) have been used to empirically predict the balling performance of drill bits. These performance gauges, however, generally produce inconsistent results. This paper presents new design features, guided by
Michael Wells +2 more
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Hydraulic Optimization of PDC Bits
European Petroleum Conference, 1990ABSTRACT The aim of our work is to improve the understanding of flow distribution and determine the optimum set of hydraulic design parameters that favour the drilling fluid circulation, with both computations and experiments. Once a new bit design has been defined according to these criteria, field tests will be done for a final ...
I. King +4 more
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Coiled-Tubing Drilling With Specialized PDC Bits
Proceedings of SPE/IADC Drilling Conference, 1994abstract The ability to effectively use any technology depends on how well it is understood. This condition becomes even more important with emerging technologies, as is Coiled Tubing Drilling (CTD). This paper will define the components of CTD as a "system" (Coiled Tubing Unit-Downhole Motor-Bit), and show that the understanding of the ...
Graham Mensa-Wilmot, R. B. Coolidge
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