Abstract Power consumption of wellbore drilling in oil and gas exploitations count for 40% total costs, hence power saving WBM (water-based mud) by adding different concentrations Al 2 O 3 , TiO SiO nanoparticles is investigated here. A high-speed Taylor–Couette system (TCS) was devised to operate at speeds 0–1600 RPM simulate using nanofluids laminar turbulent flow conditions. The TCS control ...

Wheat ear insects in large scale winter wheat field in Salzmünde (Saxsony-Anhalt) central Germany were evaluated. The present study aimed at studying the abundance of wheat blossom midges WBM, Sitodoplosis mosellana (Géhin), Contarinia tritici (Kirby) and thrips, Limothrips cerealium (Haliday) and Haplothrips tritici (Kurdjumov). Infestation in winter wheat during the growing seasons 2007, 2008...

In the vast optimization field, many computer-aided techniques were proposed and tested in the last decades. The artificial intelligence meta-heuristics constitute the widest part of such techniques, which proved to be adequate to (near) optimally solve big difficult instances, as the most real optimization problems are. Among them, the agent-based techniques are the most recent ones and they r...

Wolbachia are endosymbiotic bacteria found in the majority of arthropods and filarial nematodes of medical and veterinary importance. They have evolved a wide range of symbiotic associations. In filarial nematodes that cause human lymphatic filariasis (Wuchereria bancrofti, Brugia malayi) or onchocerciasis (Onchocerca volvulus), Wolbachia are important for parasite development, reproduction and...

With the advent of high strength geogrids, the interest of civil engineers in using geosynthetics as reinforcement material in pavement construction has increased. An experimental study is carried out at IIT Delhi to understand the effect of geogrid in unpaved roads. Behavior of composite material, which comprises of Yamuna sand as subgrade and Water Bound Macadam (WBM) as base course is studie...

Nanoparticle drilling fluids have the potential to minimize wellbore instability problems. There is a need for development of new generation handle problems especially in lost circulation zones and shale A rheological model needed accurately describe rheology nano base fluid because limited experimental data are currently available using carbon particles water mud Inability current methods addr...

Oil well drilling fluid rheology, lubricity, swelling, and loss control are all critical factors to take into account before beginning the hole's construction. Drilling fluids can be made smoother, more cost-effective, efficient by investigating evaluating effects of various nanoparticles including aluminum oxide (Al2O3) iron (Fe2O3) on their performance. A fluid's performance assessed comparin...