Results 51 to 60 of about 73,102 (307)
Simulation and Analysis of Density Control Technology for Cementing Slurry Mixing Units in China
Shiyou jixie, 2021 As more and more large diameter well, deep well and ultradeep well are put into application in the process of petroleum exploration and development, especially, the ocean resources are further developed, higher requirements are put forward for the ...
Chen Chunxia, Sun Xiang'e
doaj
Energies, 2019 Geothermal well integrity has proven to be of high importance, especially because the geothermal life span is expected to be longer than that of conventional oil and gas wells.
Catalin Teodoriu +2 more
doaj +1 more source
Introducing Pure Calcium Orthophosphate Gels and Aerogels
Advanced Functional Materials, EarlyView.The synthesis of calcium phosphate‐based gels and aerogels is reported, which exhibit highly porous structures built up of networks of nanoparticles. In case of amorphous aerogels, this leads to yet unmatched specific BET surface areas, making these materials especially interesting for biomedical applications.
Oliver Jeske +4 more
wiley +1 more source
Evaluation of the performance of local cement for oil well cementing operations in Algeria [PDF]
, 2018 The cementing of oil wells is done using special cement called ‘’class G cement’’, whose properties should meet the requirements of the American Petroleum Institute (API).
HAMI, Brahim +2 more
core +1 more source
Predicting Atomic Charges in MOFs by Topological Charge Equilibration
Advanced Functional Materials, EarlyView.An atomic charge prediction method is presented that is able to accurately reproduce ab‐initio‐derived reference charges for a large number of metal–organic frameworks. Based on a topological charge equilibration scheme, static charges that fulfill overall neutrality are quickly generated.
Babak Farhadi Jahromi +2 more
wiley +1 more source
Fundamental requirements for properties of cement slurry and stone for lowtemperature wells
Известия высших учебных заведений: Нефть и газ, 2019 The article is devoted to the issue of well cementing in the interval of frozen rocks and factors affecting the quality of cementing. Attention is drawn to fundamental requirements for the technological properties of cement slurry and stone for low ...
V. G. Kuznetsov +4 more
doaj +1 more source
Advanced Functional Materials, EarlyView.This study shows that lizard osteoderm capping tissue is a hyper‐mineralized hydroxyapatite layer consistently covering the superficial osteoderm surface in those species studied here, yet it varies greatly in morphology, nanostructure, and mechanical performance across species.
Adrian Rodriguez‐Palomo +10 more
wiley +1 more source
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 +4 more
core
Residual capability of alkali binding by hydrated pozzolanic cements in long-service concrete structures [PDF]
, 2018 An experimental procedure was developed and applied to cement pastes made with two different pozzolanic cements (CEM IV/B (P) and CEM IV/B (V)) in order to ascertain the existence of a residual capability of alkali binding by long-term hydrated ...
Antonio Evangelista Paolini, And +2 more
core +2 more sources
Advanced Functional Materials, EarlyView.Materials exist that are useful for gamma scintillation, radiation shielding, neutron‐gamma pulse shape discrimination (PSD), thermal neutron detection, or high refractive index applications. While certain materials have exhibited optimal performance for each of these applications, none achieve multiple functions.
Isabelle Winardi +13 more
wiley +1 more source