Results 41 to 50 of about 126,181 (293)

Impact of the drilling fluid system on the effectiveness of a high pressure jetting assisted rotary drilling system

Heliyon, 2020
An enhanced drill bit combining high pressure fluid jetting with a conventional rotary drilling system incorporating a tailored drilling fluid was designed to improve drilling performance in hard crystalline rock.
Timon Echt, Thomas Stoxreiter, Johann Plank   +2 more
doaj   +1 more source

SUBSTANTIATION OF MUD PREPARATION TECHNOLOGY [PDF]

, 2018
To study the advantages of hydrodynamic cavitation, to calculate the frequency of cavitation oscillations by the device parameters, to obtain a formula for determining the dispersion time of the material, and to study the flow of the drilling ...
KAMYSHATSKYI, Oleksandr, KHOMENKO, Volodymyr, KOZHEVNYKOV, Anatolii, NAUMENKO, Mykolai, PASHCHENKO, Oleksandr, RATOV, Boranbai   +5 more
core  

Investigation of Oxygen‐Free Wetting Behavior of Aluminum on Copper via Molecular Dynamics Simulations and Experiments

Advanced Engineering Materials, EarlyView.
The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu, Timon Steinhoff, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Christian Klose, Ludger Overmeyer, Hans‐Jürgen Maier, Nina Merkert   +8 more
wiley   +1 more source

Experimental Study on Optimization of Acid-Fracturing Technique for Efficient Communication of Multi-Fracture-Cavity Structure Reservoirs

Zuanjingye yu wanjingye
Fractured-vuggy carbonate reservoirs are difficult to stimulate because of the complex fracture and vug connection as well as the varied formation structures.
Xiaofan TANG, Pandeng LUO, Zhifeng SONG, Zhengquan HE, Zhifeng LUO   +4 more
doaj   +1 more source

An experimental drilling apparatus used for evaluating drilling risks related to natural gas hydrate

MethodsX, 2020
Some countries are trying to drill and exploit natural gas hydrate (NGH). However, the disturbance effects of drilling on the stability of NGH-bearing sediments are unclear.
Tian-Jia Huang, Yu Zhang, Yi Wang, Xiao-Sen Li, Zhao-Yang Chen   +4 more
doaj   +1 more source

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Formulation of High Temperature Gas-Kick Preventer and Its Mechanism of Blocking Gas Cut

Zuanjingye yu wanjingye
In high temperature reservoir operations, oil/gas cut causes drilling accidents such as well kick and even well blowout. Conventional polymer gels, though can be used to prevent gas channeling from occurring, have poor high temperature resistance.
Zhen ZHANG, Da YIN, Xiaoming SU, Wei FENG   +3 more
doaj   +1 more source

Space weather effects on drilling accuracy in the North Sea [PDF]

, 2005
The oil industry uses geomagnetic field information to aid directional drilling operations when drilling for oil and gas offshore. These operations involve continuous monitoring of the azimuth and inclination of the well path to ensure the target is ...
Allen, W., Baillie, O., Bowe, J., Clarke, E., Lesur, V., Macmillan, S., Reay, S.J.   +6 more
core   +5 more sources

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

Technologies for Lost Circulation Control in Deep Coalbed Methane Drilling in the East of the Junggar Basin

Zuanjingye yu wanjingye
Lost circulation in reservoir drilling has been encountered in deep coalbed methane drilling in the east of Junggar Basin (Xinjiang) because the reservoir formations have insufficient pressure bearing capacity.
Yingbiao LIU, Kesheng RONG, Ze YANG, Jiaqin GONG, Nizati KAN, Hui ZHANG, Jintao AN   +6 more
doaj   +1 more source