Results 41 to 50 of about 431 (193)

Numerical modeling on drilling fluid and cutter design effect on drilling bit cutter thermal wear and breakdown

Journal of Petroleum Exploration and Production Technology, 2019
The unconventional reservoir geological complexity will reduce the drilling bit performance. The drill bit poor performance was the reduction in rate of penetration (ROP) due to bit balling and worn cutter and downhole vibrations that led to ...
Ahmad Zhafran Ayop, Ahmad Zafri Bahruddin, Belladonna Maulianda, Aruvin Prakasan, Shamammet Dovletov, Eziz Atdayev, Ahmad Majdi Abdul Rani, Khaled Abdalla Elraies, Tarek Al-arbi Ganat, Reza Barati, Sia Chee Wee   +10 more
doaj   +1 more source

Zebrafish xenograft models as a fast platform for metastasis diagnosis and cisplatin response of head and neck squamous cell carcinoma

Animal Models and Experimental Medicine, EarlyView.
A zebrafish xenograft model accurately distinguishes metastatic from non‐metastatic HNSCC and recapitulates cisplatin sensitivity/resistance patterns. Using patient‐derived tumors, it predicts individual therapeutic responses, offering a rapid, clinically applicable platform for guiding personalized treatment. Abstract Background Head and neck squamous
Lu Chen, Shu Sun, Yujia Liu, Liehao Jiang, Cuiyun Wu, Ting Liu, Yujiao Zhao, Yuwei Liu, Lu Liu, Qi Wang, Xiaowei Zheng, Ping Huang   +11 more
wiley   +1 more source

Standardization of measurement and reporting of medication adherence using the TEN‐SPIDERS tool for claims data

British Journal of Clinical Pharmacology, EarlyView.
This study provides the first open‐source tool to implement the complete TEN‐SPIDERS framework in linked datasets for the determination of the PDC for medication adherence. The TEN‐SPIDERS tool enables transparent, reproducible medication adherence research through automated reporting of all calculation parameters and flexible customization options ...
Adam C. Livori, Tzu‐Yung Kuo, Jenni Ilomäki, Monique F. Kilkenny, Stella Talic, Zanfina Ademi, J. Simon Bell, Jedidiah I. Morton, Lachlan L. Dalli   +8 more
wiley   +1 more source

A New Method for the Real-Time Monitoring of PDC Bit Cutter Wear Based on the Drilling Rate Mode

Shiyou jixie, 2020
In order to carry out real-time quantitative monitoring on the wear degree of PDC bit cutter, the drilling rate equation suitable for PDC bit was optimized.
Hao Yalong, Ge Yunhua, Wang Haige, Bi Wenxin, Huang Jiagen, Liu Haoyang   +5 more
doaj  

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

Deep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li, Ting Ren, Ningping Yao, Jon Roberts, Haitao Song, Zhongbei Li, Xueqiu He, Liang Zhao   +7 more
wiley   +1 more source

Grading Method for PDC Cutter Wear Based on Improved HRNet and Ellipse Fitting

Shiyou jixie
The current PDC cutter wear grading has problems of low efficiency， poor standardization and insufficient accuracy. This paper presents a wear grading method based on improved HRNet and ellipse fitting. First， the contour of the PDC cutter was extracted.
Cheng Zhanbo, Xiong Ling, Ding Xin, Chen Gang, Ye Daohui, Li Shufan   +5 more
doaj   +3 more sources

Carbon Anodes for Low‐Temperature Nonaqueous Alkali Metal‐Ion Batteries

EcoEnergy, EarlyView.
This review summarizes recent progress in carbon anodes for low‐temperature nonaqueous alkali‐metal ion batteries. Fundamental thermodynamic and kinetic limitations are examined, alongside a systematic discussion of graphite, hard carbon, and emerging carbon architectures.
Zhichun Miao, Dandan Yu, Guojie Liu, Yuyang Qin, Jingyun Mou, Wenlong Song, Lu Shi, Zengqin Xiao, Xin Yuan, Huayu Chen, Laishun Qin, Da Chen   +11 more
wiley   +1 more source

3D Numerical Simulation of Rock Cutting of an Innovative Non-Planar Face PDC Cutter and Experimental Verification

Applied Sciences, 2019
The low rock breaking efficiency of conventional polycrystalline diamond compact (PDC) bits in hard abrasive formations prompts the development of PDC cutting elements from the planar structure to the non-planar structure.
Jianxun Liu, Hualin Zheng, Yuchun Kuang, Han Xie, Chao Qin   +4 more
doaj   +1 more source

Failure analysis and optimum structure design of PDC cutter

Mechanics, 2017
The PDC (Polycrystalline Diamond Compact) cutter is widely prevailed in the markets of measuring and cutting tools, down-hole tools of oil and gas drilling, mining and geothermal drilling industries. However, PDC cutters failure results in reduced bit life and low efficiency rock breaking thereby limiting the popularity and application of drilling ...
Chunyan Kong, Zheng Liang, Derong Zhang
openaire   +2 more sources

Transient Charging Dynamics in Stacked Ga2O3/ZnO Photovoltaic Units Governing Wavelength‐Selective Polarity Switching

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This work reveals a “Photovoltaic‐Capacitance” coupling mechanism in stacked Ga2O3/ZnO devices, defining the ZnO/graphene interface as a novel Photovoltaic Dynamic‐Capacitor (PDC). The wavelength‐selective bipolar response enables a physical layer secure communication protocol based on ternary optical logic (“1,” “0,” “−1”).
Songqi Zhao, Man Zhao, Dayong Jiang, Yuhan Duan, Haoming Wei, Qingcheng Liang, Rui Deng   +6 more
wiley   +1 more source