Results 91 to 100 of about 132,867 (357)

Research progress and development of deep and ultra-deep drilling fluid technology

Petroleum Exploration and Development
The research progress of deep and ultra-deep drilling fluid technology systematically reviewed, the key problems existing are analyzed, and the future development direction is proposed.
Jinsheng SUN, Jingbin YANG, Yingrui BAI, Kaihe LYU, Fengbao LIU   +4 more
doaj   +1 more source

Introducing Bentonite into the Environment in the Construction Stage of Linear Underground Investment Using the HDD Method

Applied Sciences, 2018
The study discusses the issue of introducing drilling fluid (bentonite) into the environment during the construction of linear underground investments, considering the example of the construction of the high-pressure gas pipeline, Czeszów— ...
Urszula Kwast-Kotlarek, Maria Hełdak, Jakub Szczepański   +2 more
doaj   +1 more source

Covalent Organic Frameworks for Water Sorption: The Importance of Framework Physical Stability

Advanced Functional Materials, EarlyView.
This study explores the water‐vapor stability of 2D covalent organic frameworks (COFs) with varying pore sizes. Results reveal microporous COFs demonstrate superior stability compared to mesoporous ones, despite lower water uptake. Mesoporous keto‐enamine‐linked COFs show enhanced stability due to intralayer hydrogen bonds, confirmed by simulations and
Wei Zhao, He Li, Bui Duc Thuan, Weidong Chen, Qiang Zhu, Mounib Bahri, Boyu Li, Kexin Yu, Chengjun Kang, Ting Chen, Zekun Wang, Nigel D. Browning, Kian Jon Chua, Dan Zhao   +13 more
wiley   +1 more source

Assessment of the Biogenic Souring in Oil Reservoirs under Secondary and Tertiary Oil Recovery

Energies
The formation of hydrogen sulfide (H2S) in petroleum reservoirs by anaerobic microbial activity (through sulfate-reducing microorganisms, SRMs) is called biogenic souring of reservoirs and poses a risk in the petroleum industry as the compound is ...
Hakan Alkan, Felix Kögler, Gyunay Namazova, Stephan Hatscher, Wolfgang Jelinek, Mohd Amro   +5 more
doaj   +1 more source

Analysis of uneven density of oil-based drilling fluid caused by shale respiration [PDF]

E3S Web of Conferences
Longmaxi shale formation has developed beddings and fractures in southern Sichuan, which is prone to well leakage and wellbore instability. In the drilling process of horizontal section of Ning 209H58-2 well, drilling fluid would loss during circulation ...
Ni Xiaoxiao, Li Jian, Wang Jianhua, Yang Haijun, Liu Rentong, Shi He, Yan Lili, Gao Shan, Wang Xiaofei, Zhang Die   +9 more
doaj   +1 more source

A Review on MXene Terminations

Advanced Functional Materials, EarlyView.
Surface terminations play a decisive role in determining the properties of MXenes. Their coordination, composition and stoichiometry can be tuned both during synthesis and through post synthesis methods to tailor MXenes for optimum performance in applications. This review explores the present understanding of surface terminations.
Hari Hara Sudhan Thangavelu, Changjie Huang, Florian Chabanais, Justinas Palisaitis, Per O. Å. Persson   +4 more
wiley   +1 more source

Simulation study of rotor erosion for a continuous-wave pulse generator by computational fluid dynamics

Systems Science & Control Engineering, 2019
Continuous-wave pulse generator plays an important role in generating high-quality pulse signals in measurement while drilling systems. However, the generator affects the quality of pressure wave signals due to erosion on the continuous wave generator ...
Zhidan Yan, Xue Yin, Yongchao Yao, Jianhua Liu, Minmin Liu, Junfei Wang, Zhenyu Yang, Xiang Shi   +7 more
doaj   +1 more source

3D Common-Refinement Method for Non-Matching Meshes in Partitioned Variational Fluid-Structure Analysis

, 2017
We present a three-dimensional (3D) common-refinement method for non-matching meshes between discrete non-overlapping subdomains of incompressible fluid and nonlinear hyperelastic structure.
Jaiman, Rajeev Kumar, Joshi, Vaibhav, Law, Yun Zhi, Li, Yulong   +3 more
core   +1 more source

Single Solid‐State Ion Channels as Potentiometric Nanosensors

Advanced Functional Materials, EarlyView.
Single gold nanopores functionalized with mixed self‐assembled monolayers act as solid‐state ion channels for direct, selective potentiometric sensing of inorganic ions (Ag⁺). The design overcomes key miniaturization barriers of conventional ion‐selective electrodes by combining low resistivity with suppressed loss of active components, enabling robust
Gergely T. Solymosi, Gyula Jágerszki, Levente Illés, Péter Fürjes, Róbert E. Gyurcsányi   +4 more
wiley   +1 more source

Improved diamond coring bits developed for dry and chip-flush drilling [PDF]

, 1971
Two rotary diamond bit designs, one operating with a chip-flushing fluid, the second including auger section to remove drilled chips, enhance usefulness of tool for exploratory and industrial core-drilling of hard, abrasive mineral deposits and ...
Decker, W. E., Hampe, W. R., Hampton, W. H., Simon, A. B.   +3 more
core   +1 more source