Results 1 to 10 of about 14,667,599 (290)

Accurate Calculation Method for Mechanical Specific Energy of Horizontal Well

IOP Conference Series: Materials Science and Engineering, 2020
Abstract The existing drilling efficiency-monitoring model based on the theory of mechanical specific energy is only applicable to vertical wells. When it is used to monitor the drilling efficiency of horizontal wells, the impact of high friction in horizontal wells is not considered, so the monitored specific energy of the machine is ...
Shuangshuang Wang, Qian Li
openaire   +1 more source

Technology of Rock Destruction by Combined Explosion-Mechanical Load [PDF]

Наукові вісті Національного технічного університету України "Київський політехнічний інститут", 2017
Background. Rock drilling is characterized by an energy capacity of more than 120 kWh/m3. This is due to the fact that about 90 % of the energy is expended on the “preparation” of rocks for destruction.
Oleg M. Terentiev, Pavlo V. Gontar
doaj   +1 more source

Evaluating the Effect of Stabilized Weight Transfer to the Bit on Mechanical Specific Energy in Horizontal Well Drilling

Eng
This study investigates the effect of stabilizing axial load transfer to the bit on mechanical-specific energy during horizontal well drilling. To analyze drilling regimes, field data on WOB, ROP, RPM, TOB, and MSE were used and processed using z-score ...
George Buslaev, Aleksandr Konoplyannikov, Elizaveta Smirnova   +2 more
doaj   +1 more source

Research on Interdependence between Specific Rock Cutting Energy and Specific Drilling Energy

Applied Sciences, 2023
A method based on extensive laboratory and field measurements was developed to determine the dependence of specific rock cutting energy (SEc) on specific drilling energy (SEd) for machines with different operating and design characteristics and similar ...
Davor Antoljak, Dalibor Kuhinek, Tomislav Korman, Trpimir Kujundžić   +3 more
doaj   +1 more source

Study of the Critical Speed of Ultra-High-Speed Diamond Drilling Technology in Marble

Applied Sciences
In order to effectively improve the drilling speed in deep hard rock and save drilling costs, this study explores the transformation mechanism and critical velocity range of ultra-high-speed diamond drilling technology on rock breaking effect, using ...
Yuxiao Li, Kai Zhang, Yue Wang
doaj   +1 more source

Influence of PDC Cutter Diameter on Cutting Force

Shiyou jixie, 2023
PDC bit design needs to be customized depending upon the formation lithology characteristics, and especially the diameter of PDC cutter is an important parameter in bit design optimization.A series of laboratory simulation tests were conducted to explore
Wei Jiusen, Shao Fangyuan, Tan Ziyang, Liu Wei, Gao Deli   +4 more
doaj  

Specific Energy Based Characterization of Surface Integrity in Mechanical Machining

Procedia Manufacturing, 2017
In mechanical machining operations, process mechanisms and machining efficiency can be characterized by the cutting tool geometry, process parameters and workpiece materials. These variables are vital parameters to evaluating the specific cutting energy demand as indication to sustainable manufacture. In today's manufacturing environment, where minimum
Balogun, Vincent A., Mativenga, Paul T.; id_orcid 0000-0002-7583-5163   +1 more
openaire   +2 more sources

Real-time automatic identification methods for downhole whirling based on mechanical specific energy model of drill bit

Science and Technology for Energy Transition
In the drilling exploitation of hot dry rock for geothermal energy, whirling is one of the main low-efficiency conditions that affect the efficiency of Polycrystalline Diamond Compact (PDC) bit in horizontal well drilling.
Song Weiqiang, Mu Huidong, Yu Haiyang, Zhao Guangzhi, Kong Lulin, Sun Xue, Sun Zhiwei   +6 more
doaj   +1 more source

Laboratory Experimental Study on Rock Breaking Efficiency and Stability of PDC Bit

Shiyou jixie, 2020
In order to evaluate the rock breaking efficiency and stability of the newly developed PDC bit in the target lithologic formation, and guide the optimization, improvement and efficient use of the newly developed PDC bit, full scale laboratory rock ...
Zhang Jiawei, Meng Zhao, Ji Guodong, Cui Meng, Wang Haige, Yang Xiongwen, Yu Lianjie   +6 more
doaj  

Characterization of cassava starch processed in an internal mixer

Polímeros, 2013
An internal mixer connected to a torque rheometer was used to investigate the effect of moisture content (13.2 to 46.8 g.100g- 1), rotation speed (13.2 to 46.8 rpm) and processing temperature (53.2 to 86.8 °C), applying a factorial central composite ...
Marcia Cristina da Silva, Diego Palmiro Ramírez Ascheri, Carlos Wanderlei Piler de Carvalho, Melicia Cintia Galdeano, Cristina Tristão de Andrade   +4 more
doaj   +1 more source