Results 51 to 60 of about 431 (193)

Mechanisms underlying lateral force applied to a PDC cutter on a PDC drill bit during rotary rock breaking

Meitian dizhi yu kantan
ObjectiveTo improve the rock-breaking efficiency and durability of drill bits in the theoretical research on the optimal design of drill bits, the key is to systematically reveal both the rock-breaking mechanisms of polycrystalline diamond compact (PDC ...
Jiusen WEI, Xin HAN, Wei LIU, Deli GAO
doaj   +1 more source

Evaluation of Drillability of the Mahu Conglomerate Formation in Xinjiang, China

Energy Science &Engineering, EarlyView.
This graphical abstract illustrates the workflow for developing an optimized prediction model using measurement while drilling (MWD) data. A total of 90 MWD cases are divided into a training set (80%) and a test set (20%). Four logging‐while‐drilling parameters—compensation density, acoustic travel time, resistivity, and neutron porosity—are selected ...
Yun Xia, Wan Zhu, Rui Chen, Hui Zhang, Boyuan Yang, Kunhong Lv, Baokang Wu, Xinrui Wang, Hu Wu   +8 more
wiley   +1 more source

EFFECT OF CUTTING PARAMETERS ON TEMPERATURE OF A SINGLE POLYCRYSTALLINE DIAMOND COMPACT (PDC) CUTTER

Platform, a Journal of Engineering, 2020
The usage of polycrystalline diamond compact (PDC) drill bit has significantly increased in the petroleum industry due to its high rate of penetration and long life.
Abdul Hazim Abdullah , Mohd Azuwan Maoinser   +1 more
doaj  

Cutting Efficiency of a Single PDC Cutter on Hard Rock

Canadian International Petroleum Conference, 2007
Abstract Polycrystalline diamond compact (PDC) bits have gained wide popularity in the petroleum industry for drilling soft and moderate-strength formations. However, in hard-formation applications the PDC bit still has limitations even though continuing developments in PDC cutter designs and materials have steadily
G. Hareland, R. Nygaard, W. Yan, J.L. Wise   +3 more
openaire   +2 more sources

Recent Advances in Luminescent Hydrogen‐Bonded Organic Frameworks (HOFs): Linker Design, Phosphorescence, and Smart Responsiveness

Information &Functional Materials, EarlyView.
Luminescent Hydrogen‐bonded organic frameworks (HOFs) provide an innovative platform for sensing and optoelectronic applications. This review outlines design principles, recent advances in synthesis and optical tuning, diverse sensing applications, and discusses current challenges and future directions for HOFs.
Heng Wu, Fengqi Wang, Zhuoyan Dong, Yuanchao Lv, Zhangjing Zhang   +4 more
wiley   +1 more source

Human Umbilical Cord Mesenchymal Stem Cell–Derived Exosomes Attenuate Renal Fibrosis by Suppressing Fibroblast Activation via the INHBA/PI3K/AKT Pathway

Pediatric Discovery, EarlyView.
MSC‐Exo derived from human umbilical cord (HucMSC‐Exo) downregulates INHBA expression, consequently modulating the PI3K/AKT signaling cascade. This regulation attenuates renal fibroblast activation and extracellular matrix deposition, thereby exerting a renoprotective effect against fibrosis.
Meiling Chen, Chenxi Jia, Zhuocheng Shi, Bianan Zhu, Yihang Yu, Xing Liu, Feng Liu, Jianwei Chen, Tao Xu, Yuanyuan Zhang, Deying Zhang, Guanghui Wei   +11 more
wiley   +1 more source

FRACTOGRAPHIC ANALYSIS OF PDC CUTTER FAILURE MECHANISMS

IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY
The paper presents the results of a study of the physical mechanisms of operational damage and failure of polycrystalline diamond layers in PDC cutters (Polycrystalline Diamond Compact), which are the cutting elements of diamond and matrix drill bits. For this purpose, fractographic analysis of the fracture surfaces of the diamond layer in PDC cutters ...
V.A. KOLIBASOV, I.D. IBATULLIN, D.O. KOPYTIN, V.A. NOVIKOV, A.A. AKOPYAN, A.S. BOLDYREVA   +5 more
openaire   +1 more source

Universal Confinement Length Governs Radical Depolymerization Kinetics in Nanoconfined Polymers

Small, EarlyView.
Analysis of PMMA depolymerization kinetics identifies a critical threshold under extreme nanoconfinement where segmental mobility saturation prevents further increases in depolymerization temperature. ABSTRACT Thermal depolymerization is typically studied in bulk, yet many systems involve polymers confined within nanoscale geometries. Understanding how
Uiseok Hwang, Ching‐Yu Wang, Zhanyuan Liu, John M. Vohs, Baekmin Q. Kim, Daeyeon Lee   +5 more
wiley   +1 more source

Numerical Simulation on Rock-Breaking Performance of Prismatic PDC Cutter

Shiyou jixie
Conventional PDC bit exhibits severe wear,difficult penetration and low rate of penetration(ROP)in abrasive formations.Prismatic PDC cutter is superior to conventional planar PDC cutter in rock-breaking performance,but there is a lack of basis for the ...
Cheng Wei, Xing Xuesong, Lou Yishan, Zhu Liang, Yin Biao   +4 more
doaj  

Development and application of a hybrid PDC bit for drilling the high temperature granite formation in the deep geothermal exploration well Fushenre-1

Energy Geoscience
Geothermal energy is a clean and renewable energy with significant potential. During the drilling process of geothermal development, conventional drill bits often suffer from significant wear and severe cutter breakage.
Huaizhong Shi, Senlin He, Chao Xiong, Zhongwei Huang, Wenhao He, Gensheng Li   +5 more
doaj   +1 more source