Results 81 to 90 of about 519,021 (315)

Drilling Fluid Technology for Test Well with Ultra-Long Horizontal Section in Shale Oil Block Gulong

Zuanjingye yu wanjingye
With the development of the “Daqing Gulong Continental Shale Oil National Demonstration Zone”, wells with ultra-long horizontal sections are drilled to evaluate the correlation between the length of the horizontal section and the oil and gas production ...
Chunwu GONG, Nuo XU, Yang SHENG, Xu LIU, Changli QI, Bo LI   +5 more
doaj   +1 more source

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

Technical difficulties in the cementing of horizontal shale gas wells in Weiyuan block and the countermeasures

Natural Gas Industry B, 2016
When well cementing is conducted in horizontal shale gas wells in Weiyuan block of the Weiyuan–Changning State Shale Demonstration Area, Sichuan Basin, the oil-based drilling fluid is not compatible with cement slurry, is difficult to be displaced ...
Jinping Yuan, Yongjin Yu, Shuoqiong Liu, Ming Xu, Lianjiang Li, Jiyun Shen   +5 more
doaj   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Tuning the Dielectric Properties of Individual Clay Nanosheets by Interlayer Composition: Toward Nano‐Electret Materials

Advanced Functional Materials, EarlyView.
The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich, Paul Markus, Matthias Stöter, Bernhard Biersack, Rainer Schobert, Josef Breu, Georg Papastavrou   +6 more
wiley   +1 more source

Automated operational states detection for drilling systems control in critical conditions

, 2013
Critical events in industrial drilling should be overcome by engineers while they maintain safety and achieve their targeted operational drilling plans.
Sabeur, Zoheir, Veres, Galina
core  

Testing of Sealing Elements for FIB Apparatus Designed to Liquidate Open Eruption by Drilling Tools [PDF]

, 2018
Petroleum and natural gas still have their place among the most important resources in many industrial areas. Their global consumption influences an increasing demand on the quality of drilling works and the efficiency ...
Bujok, Petr, Klempa, Martin, Porzer, Michal, Ryba, Jakub, Šancer, Jindřich   +4 more
core  

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Auto‐Generated Valence States in Electrocatalysts for Boosting Oxygen and Hydrogen Evolution Kinetics in Alkaline Water/Alkaline Seawater/Simulated Seawater/Natural Seawater

Advanced Functional Materials, EarlyView.
This review systematically highlights the latest achievements in mixed‐valence states relevant to hydrogen and oxygen evolution reactions, providing essential insights into future directions and methods for large‐scale practical implementation. This critical review is expected to provide an overview of recent advancements in diverse valence‐state metal
Jitendra N. Tiwari, Gokul Bhaskaran, Krishan Kumar, Yun Suk Huh, Young‐Kyu Han   +4 more
wiley   +1 more source

Research and Application of Precise Pipe Stand Handling Technique for Drill Floor Manipulator

Shiyou jixie
Precise pipe stand handling is challenge in the advancement of the drill floor manipulator. Depending on the structural features and field application of the manipulator， the factors influencing precise pipe stand handling were analyzed， revealing the ...
Zhao Liangliang, Ye Qiang, Wang Yaohua, Bai Bingjian, Hou Wenhu, Jiang Zhen, Luan Luyu   +6 more
doaj   +1 more source