Results 131 to 140 of about 2,300 (225)

Effect of Size and Shape of PDC Cutter on Wear Rate in Multi Layer Formation [PDF]

, 2015
During a normal drilling operation, the rate of penetration (ROP) often over focused while the wear rate is less taken care of. However, wear rate is a more severe problem faced in a long run drilling operation in multi-layer formation rather than ...
Vern, Kong Kai
core  

Three Men and an Abbey: The Cornaro Triple Portrait☆

Renaissance Studies, Volume 40, Issue 1, Page 97-120, February 2026.
Abstract This paper builds on the author’s recent identification of an early sixteenth‐century painting in the National Gallery of Ireland as containing rare portraits of Giorgio Cornaro (brother of Caterina, Queen of Cyprus) and his son Cardinal Francesco.
Rachel Healy
wiley   +1 more source

Parametric study of a single PDC cutter with a numerical model [PDF]

, 2009
Single cutter models constitute a cornerstone to understand the cutting process while drilling. There are various experimental and numerical studies on simulating cutting behavior of a single cutter in order to optimize drilling performance.
Sunal, Ozge
core   +1 more source

Investigation of Rock-Breaking Mechanisms Based on the Adaptive Matching Method for Drilling Loads

Applied Sciences
Considering stick–slip vibration and the impact loads formed while drilling in strongly heterogeneous formations or soft–hard interbedded formations, an adaptive matching drilling load method is presented in this paper to form dynamic drilling loads to ...
Huaigang Hu, Guodong Ji, Fangyuan Shao, Liling Zhang, Kai Wei   +4 more
doaj   +1 more source

Simulation on Microscopic Damage of PDC Cutter During Conglomerate Cutting

Shiyou jixie
Conglomerate generally has complex pore structures and severe heterogeneity.Drilling by PDC bit in conglomerate usually exhibits low rock-breaking efficiency, and the rock-breaking process of PDC cutter can hardly be investigated through laboratory ...
Yang Hongyu, Deng Qingyuan, Ye Bailiang, Liu Jianping, Huang Anlong   +4 more
doaj  

Rock Breaking Simulation and Optimization of PDC Bit for Jimsar Shale Formation

Shiyou jixie
Conventional planar-cutter PDC bit exhibits prominent problems in drilling， such as severe wear， frequent cutter breakage and short footage， resulting in low drilling efficiency and high cost. To improve the drilling speed and reduce the drilling cost in
Zang Chuanzhen
doaj   +1 more source

Numerical Simulation on Rock-breaking and Temperature Characteristics of Sawtooth PDC Cutter

Shiyou jixie
Most of the researches on bionic teeth focus on the wave tooth shape, and there are few reports on the rock-breaking properties of sawtooth cutters.Based on plasto elasticity and Drucker-Prager rock failure criteria, a finite element model of interaction
Wu Zebing, Yuan Ruofei, Zhang Wenxi, He Xiaolin, Liu Jiale   +4 more
doaj  

Research and Application of Ridged Diamond Element Bit

Shiyou jixie, 2018
To address the problems of cylindrical PDC cutters like thermal wear, impact damage and balling and the required high WOB for conical cutters, the ridged diamond element drill bit technology is studied.
Feng Songlin, Fan Song, Bao Lijun, Hou Baodong   +3 more
doaj  

Instability regimes and self-excited vibrations in deep drilling systems [PDF]

, 2013
peer ...
Depouhon, Alexandre, Detournay, Emmanuel
core  

Analysis on Fluid-Solid-Thermal Coupling Field in Rock Breaking Under Composite Impact Loads Based on Simulation Model

Shiyou jixie
In order to reveal the rock-breaking mechanism of full-size PDC bit under composite impact loads,from the perspective of temperature,a simulation model of fluid-solid-thermal coupling in rock breaking of PDC bit under composite impact loads was built ...
Cao Jifei, Zou Deyong, Li Cheng, Wang Hanxiang, Che Jiaqi, Zhang Weiqiang, Huang Zhe   +6 more
doaj