Results 91 to 100 of about 14,048 (222)

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  

An Experimental and Numerical Simulation Study on Rock Cutting Based on Pre-Breaking

Shiyou jixie, 2019
The design of the mixed-cutter placement can only rely on the engineering experience. The combination of experiment and numerical simulation is used to study the rock breaking force and rock breaking efficiency of the PDC cutter under different pre ...
Liu Zhong, Hou Huihui, Hu Wei
doaj  

TESS Data Release Notes: Sector 20, DR27 [PDF]

This release note discusses the science data products produced by the Science Processing Operations Center at Ames Research Center from Sector 20 observations made with the TESS spacecraft and cameras as a means to document instrument performance and ...
Burke, Christopher J., Caldwell, Douglas A., Doty, John P., Fausnaugh, Michael M., Jenkins, Jon M., Smith, Jeffrey C., Ting, Eric B., Twicken, Joseph D., Vanderspek, Roland, Villesenor, Joel S.   +9 more
core   +1 more source

Experimental Study on Conglomerate Breaking Characteristics of Conical PDC Cutter

Shiyou jixie, 2021
In order to further improve the rock breaking efficiency and the adaptability of drilling hard and complex strata of PDC bit, a comprehensive test device of rock breaking by PDC cutter was developed. The test device was used to conduct experimental study
Xu Weiqiang, Shi Huaizhong, Cao Quan, Shi Xingxing, Hu Xihui, Xiong Chao, Chen Han   +6 more
doaj  

Impact of Rock Cuttings on Downhole Fluid Movement in Polycrystalline Diamond Compact (PDC) Bits, Computational Fluid Dynamics, Simulation, and Optimization of Hydraulic Structures

Fluids
The flow occurring at the bottom of a polycrystalline diamond compact (PDC) drill bit involves a complex process made up of drilling fluid and the drilled rock cuttings.
Lihong Wei, Jaime Honra
doaj   +1 more source

Field Test of Torsion Impactorin Well Jinyue 7-1

Shiyou jixie, 2017
To address the issues of deep well drillingin China like low ROP and high cost, it is necessary to suppress the influence of "stick-slip vibration" on PDC bit.
Li Wei, Sun Wenfeng, Yan Tie, Chen Shichun, Li Yue   +4 more
doaj  

TESS Data Release Notes: Sector 9 DR11 [PDF]

This release note discusses the science data products produced by the Science Processing Operations Center at Ames Research Center from Sector 9 observations made with the TESS spacecraft and cameras as a means to document instrument performance and data
Burke, Christopher J., Caldwell, Douglas A., Doty, John P., Fausnaugh, Michael M., Jenkins, Jon M., Smith, Jeffrey C., Ting, Eric B., Twicken, Joseph D., Vanderspek, Roland, Villesenor, Joel S.   +9 more
core   +1 more source

Моделювання процесу буріння долотами з алмазно-твердосплавними пластинами в реальних умовах [PDF]

, 2009
Наведено теоретичні обґрунтування процесу буріння долотами з АТП в реальних умовахПриведено теоретическое обоснование процесса бурения долотами с АТП в реальных условияхIn the article the main features of PDC drill bit working were analysed with real ...
Пригоровська, Т. О.
core  

TESS Data Release Notes: Sector 18 DR25 [PDF]

This release note discusses the science data products produced by the Science Processing Operations Center at Ames Research Center from Sector 18 observations made with the TESS spacecraft and cameras as a means to document instrument performance and ...
Burke, Christopher J., Caldwell, Douglas A., Doty, John, Fausnaugh, Michael M., Jenkins, Jon M., Smith, Jeffrey C., Ting, Eric B., Twicken, Joseph D., Vanderspek, Roland, Villesenor, Joel S.   +9 more
core   +1 more source

Numerical Simulation of Downhole Particle Flow in Horizontal Well with PDC Bit

Shiyou jixie, 2019
In the deep shale gas horizontal well drilling, the low cutting carrying efficiency often lead to the problem of bit ball. To address the problem, the CFD-DEM coupling method is used to simulate the horizontal well flow field between PDC bit and ...
Kuang Yuchun, Zhang Rui, Luo Jinwu, Zhu Guanghui   +3 more
doaj