Results 21 to 30 of about 1,493 (183)

Experimental Study on Granite Broken by PDC Bit under High Temperature and High Pressure

Shiyou jixie, 2021
As the exploration and development of oil and gas gradually advance to the deep layer, the formation temperature and pressure keep increasing. The efficiency of PDC bit breaking deep hard rock under high temperature and high pressure is reduced, and the ...
Shi Huaizhong, Fu Xinkang, Chen Zhenliang, He Wenhao, Xiong Chao, Gao Fei   +5 more
doaj  

Single‐Cell Profiling Identifies SLC2A5‐Mediated Fructose Metabolism as a Vulnerability in Primary CNS Lymphoma

Advanced Science, EarlyView.
Glucose deprivation in the primary CNS lymphoma (PCNSL) tumor microenvironment drives SLC2A5 (encoding GLUT5)‐dependent fructose metabolism in tumor cells, while hypoxia induces HIF‐mediated SLC2A5 expression in tumor‐supportive macrophages, revealing SLC2A5‐driven fructose utilization as a shared and targetable metabolic vulnerability across malignant
Qiaoli Wu, Qianru Zhang, Wenqiang Yan, Lu Sun, Yiran Cui, Bolin Liu, Guoqing Han, Feng Zhang, Ke Pu, Mingchao Zhang, Xiaobing Zhang, Qingguo Li, Gang An, Yuxuan Liu   +13 more
wiley   +1 more source

New Progress and Future Development of PDC Bit

Shiyou jixie, 2016
A series of new PDC bits have been developed in foreign countries in order to raise rock breaking efficiency, extend bit service life and reduce trips, drilling cycle and drilling cost.
Pan Jun, Wang Minsheng, Guang Xinjun
doaj  

Multi‐Omic Profiling Reveals Immune Cell Priming Signature Linked to Lupus Prognosis

Arthritis &Rheumatology, EarlyView.
Objective Systemic lupus erythematosus (SLE) is a multiorgan disease with widespread immune dysregulation and significant unmet clinical need. Blood‐based gene expression studies have advanced our understanding of SLE pathogenesis but may overlook critical tissue‐specific mechanisms that drive disease heterogeneity and progression.
Michael A. Smith, Dominic Sinibaldi, Saifur Rahman, Chia‐Chien Chiang, Anna M. Hansen, Jill Henault, Carlos P. Roca, Shu Wang, Kamelia Zerrouki, Rebecca Filippi, Christopher Groves, Zerai Manna, Jun Chu, Michael Davis, Sarthak Gupta, Christopher Morehouse, Melissa de los Reyes, Rachel Ettinger, Roland Kolbeck, Mariana J. Kaplan, Miguel A. Sanjuan, Richard M. Siegel, Sarfaraz A. Hasni, Kerry A. Casey   +23 more
wiley   +1 more source

Analysis of Stick-Slip Vibration of PDC Bit under Sudden Increase of Formation Hardness

Shiyou jixie, 2019
In drilling an interbedded soft and hard formation with PDC bit, it is prone to cutter crack and damage. To address the issue, the stick-slip vibration characteristics of PDC bit during the sudden increase of formation hardness were studied.
Zha Chunqing, Chen Jie, Zhao Jincheng, Liu Gonghui   +3 more
doaj  

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  

Modelling of an effluence of drilling fluid from hydraulic holes of PDC bits [PDF]

Компьютерные исследования и моделирование, 2013
In this article some results of mathematic modelling of an effluence of drilling fluid from hydraulic holes of PDC bit are presented. Distribution of velocity and pressure in borehole bottom are received, and erosion of interior surface of hydraulic ...
Vitaly Anatolevich Bruyaka, Alexey Mikhailovich Grinev, Valery Vasilievich Remnev, Dmitry Vladimirovich Smorkalov   +3 more
doaj   +1 more source

A Code‐Invariant QSG–VGA Co‐Design Methodology for Compact CMOS Vector‐Sum Phase Shifters

International Journal of Circuit Theory and Applications, EarlyView.
A circuit‐level co‐design methodology for compact vector‐sum phase shifters is presented, combining a code‐invariant common‐gate variable‐gain amplifier (VGA) with a resistorless quadrature signal generator (QSG). By maintaining an almost constant input resistance, explicit resistors are eliminated from the QSG.
Uxua Esteban Eraso, Carlos Sánchez‐Azqueta, Francisco Aznar, Concepción Aldea, Santiago Celma   +4 more
wiley   +1 more source

Circulating monocyte partitioning and its alteration in hematological chronic neoplasms

Cytometry Part B: Clinical Cytometry, EarlyView.
Abstract Circulating monocyte partitioning refers to the relative quantification of the three main monocyte subsets in the peripheral blood, namely classical (cMo), intermediate (iMo), and non‐classical (ncMo) monocytes, as assessed by flow cytometry, a new nomenclature described 15 years ago.
Sihem Tarfi, Dorothée Selimoglu‐Buet, Ivan Sloma, Orianne Wagner‐Ballon, on behalf of the French group CytHem‐LMMC   +4 more
wiley   +1 more source

Analysis of Torsional Vibration Characteristics of PDC Bit and Design of the Damping Tool

Shiyou jixie, 2017
In order to suppress the torsional vibration of the PDC bit, the torsion model of PDC bit was established.The force on the PDC cutter during rock breaking was analyzed to attain the relationship between WOB and torque.
Zha Chunqing, Liu Gonghui, Li Jun, Xi Yan, Zhang Tao   +4 more
doaj