Insufficient hole cleaning,cutting suspension,clay swelling,and filtrate invasion of the formation might result from inadequate drilling mud properties.For effective drilling and wellbore stability,water-based mud(WBM...
This work was supported by the National Natural Science Foun-dation of China(No.52275212);the Fundamental Research Funds for the Central Universities(No.D5000230047);The authors are also grateful for the financial support from the State Key Labo-ratory of Solidification Processing(No.2022-TS-09).
Given the unique nanolaminate structure,the MAX phase ceramics which are composed of alternatively stacked two-dimensional(2D)metal(M)carbides(X)and main group(A)atomic layers have shown promising properties at elevat...
the National Natural Science Foundation of China(No.52175156);the Key Research and Development Projects of Shaanxi Province(No.2021GY-157);the Young Talent fund of University Association for Science and Technology in Shaanxi(No.20220615);the Special Fund for Basic Scientific Research of Central Colleges(Chang an University)with Nos.300102221512,300102221510,and 300102222502.
Development of energy-efficient lubricants is a way to reduce energy consumption for transportation,with the tendency to design molecules that are beneficial in reducing the viscosity of synthetic oils.Oligoether este...
support was given by the Grant-in Aid for Scientific Research(A)of Japan Society for the Promotion of Science(21H04535).
The boundary lubrication mechanism at the articulating surface of natural synovial joints has been the subject of much discussion in tribology.In this study,to elucidate the lubricating function of the superficial are...
support from the National Key R&D Program of China(2021YFA0716304);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB 0470301),the National Natural Science Foundation of China(U23A20623,21972153,and 52075524);Gansu Province Science and Technology Plan(20JR10RA060,22ZD6GA002,and 22ZD6GA025);Openning Project of State Key Laboratory of Solid Lubrication,LICP(LSL-2004);the Taishan Scholars Program.
The polyionic liquid poly-PEGMA-r-METAC(PPM)with quaternary ammonium has been synthesized and evaluated as additive in aqueous lubricating fluids.The rheological behavior of aqueous lubricating fluids with PPM has bee...
With the growth of deep drilling and the complexity of the well profile,the requirements for a more complete and efficient exploitation of productive formations increase,which increases the risk of various complicatio...
Drilling mud is a major concerning element due to its high operational and economic impact on the drilling process.Various additives are introduced to enhance the efficiency of drilling fluid,but none of them could pe...
financial support by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)within the project MU 959/47-1;Furthermore,the authors gratefully acknowledge funding in the ZuMat project;supported by the State of Saarland from the European Regional Development Fund(Europäischer Fonds für Regionale Entwicklung,EFRE).P.Grützmacher and C.Gachot would like to thank the Government of Lower Austria(WST3)for financially supporting the endowed professorship tribology at the TU Wien.V.Presser thanks Eduard Arzt(INM)for his continuing support.
Carbon nanoparticle coatings on laser-patterned stainless-steel surfaces present a solid lubrication system where the pattern's recessions act as lubricant-retaining reservoirs.This study investigates the influence of...
financially supported by the National Natural Science Foundation of China(No.51975493).
The astonishingly distinct lubricity difference between the ionic liquid modified carbon nanoparticles grafted by anion and cation moieties(A-g-CNPs and C-g-CNPs)was well established as additives of polyethylene glyco...
Project supported by the National Natural Science Foundation of China(Grant No.11902081);the Science and Technology Innovation Foundation of Higher Education Institutions of Shanxi Province,China(Grant No.2020L0172);the Natural Science Foundation for Young Scientists of Shanxi Agricultural University,China(Grant No.2020QC04);the Research Fund of Shanxi Agriculture University,China(Grant No.2021BQ12)。
The nano-friction phenomenon in a one-dimensional Frenkel-Kontorova(FK)model under Gaussian colored noise is investigated by using the molecular dynamic simulation method.The role of colored noise is analyzed through ...