Results 251 to 260 of about 140,547 (299)

Ultra‐High Strength and Environmentally Stable Fluorinated Solid‐State Ion‐Conductive Elastomers with Folding‐Paper‐Structured Triboelectric Nanogenerators for Wave Energy Harvesting

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
In this work, a polyurethane‐based fluorinated SICEs with excellent mechanical properties (7.35 MPa and 61.4 MJ m−3), conductivity (4.2 × 10−4 S cm−1), and harsh environmental resistance were prepared by a “three birds with one stone” strategy that combines multiple interactions with fluorine effects. The paper‐folding TENG is capable of harvesting not
Zequan Li, Fangyan Ou, Wei Tang, Fuqi Wang, Zhichao Zhang, Ting Xie, Chuang Ning, Wenyu Pan, Wei Gao, Shuangliang Zhao   +9 more
wiley   +1 more source

Digital simulation of rock grinding process in ball mill. [PDF]

Sci Rep
Chanturia VA, Dmitrak YV, Kravtsov AA, Zadkov DA, Klyuev RV, Kondratiev VV, Karlina AI, Martyushev NV.   +7 more
europepmc   +1 more source

The variation rule of TBM tunneling parameters in deep composite strata and the recognition method of boreability grade. [PDF]

Sci Rep
Wang H, Cui G, Shi Z, Zhang L, Gao C, Ding Z.   +5 more
europepmc   +1 more source

Bit selection method based on the rock drillability characteristics and principal component analysis of rock-breaking indicators. [PDF]

Heliyon
Hu Y, Xinlong X, Penggao Z, Zhen L, Ruihua W, Junqiao L, Shilong X.   +6 more
europepmc   +1 more source

The Effects of Brine on CCUS-EOR and Challenges Faced during CO₂ Projects: A Review Involving Storage Mechanisms with Future Prospects. [PDF]

ACS Omega
Ngouangna EN, Dzulkarnain IB, Jaafar MZ, Norddin MNAM, Oseh JO, Wan Sulaiman WR, Afeez G, Victor Ayodele B, Agwu OE, Mamah SC, Ikechukwu Nwaichi P, N Ntone EP, Agi A.   +12 more
europepmc   +1 more source

Design and Evaluation of a Thermally Stable and Salt-Resistant Amphoteric Surfactant-Based Fracturing Fluid for High-Performance Hydraulic Stimulation. [PDF]

Polymers (Basel)
Cao B, Li L, Ma F.
europepmc   +1 more source

Hydrothermal upgrading and adsorption of a water-soluble nickel-based catalyst precursor in a porous media of carbonate oil-saturated rock. [PDF]

Sci Rep
Minkhanov IF, Chalin VV, Tazeev AR, Mukhamatdinov II, Sitnov SA, Suwaid MA, Mohammed ZG, Al-Muntaser AA, Kudryashov SI, Afanasiev IS, Solovyev AV, Simakov IO, Vakhin AV, Hakimi MH, Varfolomeev MA.   +14 more
europepmc   +1 more source

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A new index of rock-breaking tool efficiency

Journal of Mining Science, 2016
Based on the analysis of qualitative interaction between rocks and a rock-breaking tool, a new coefficient of the tool efficiency is proposed. This coefficient makes it possible to estimate the quality of the tool impact on broken rocks and to predict energy input of rock breaking and, consequently, productivity of mining machines in specific ...
B. L. Gerike, V. I. Klishin, P. B. Gerike   +2 more
openaire   +1 more source

THE EFFECT OF ROCK BIT CUTTING STRUCTURE ON ROCK BREAKING EFFICIENCY

Proceedings of International Meeting on Petroleum Engineering, 1986
ABSTRACT A study of the effect of rock bit cutting structure on rock breaking efficiency was made with full scale bits for soft to medium formations on a laboratory testing rig. An analysis of the relationship between rock breakage and cutting structure based on the drilling rate, bottom hole pattern and operating parameters revealed the
Jikang Hou, Zhaofeng Luo
openaire   +1 more source

Three-dimensional simulation of rock breaking efficiency under various impact drilling loads

Arabian Journal of Geosciences, 2020
Percussion drilling is believed to be an efficient way to enhance the drilling performance, compared with the conventional drilling in deep wells, which could be achieved by applying impact loads above the drill bit. The finite simulation is an efficient method to predict the drilling performance when the drill bit interacts with rocks. In contrast, as
Yandong Yang, Hualin Liao, Jilei Niu, Zhen Wang, Junhai Chen   +4 more
openaire   +1 more source