This work focuses on the significance of particle's residence time in composite electrodeposition. Ni-SiC were produced using different pulse-reverse (PR) waveforms based average particle diameter (60 nm). The waveform was designed to deposit a metal thickness equivalent during cathodic pulse and strip half anodic pulse. shape modified study its effect codeposition by changing current density p...

The accurate control of the wellbore pressure not only prevents lost circulation/blowout and fracturing formation by managing the density of the drilling fluid, but also improves productivity by mitigating reservoir damage. Calculating the geothermal pressure of a geothermal well by constant parameters would easily bring big errors, as the changes of physical, rheological and thermal properties...

The rheological regulation of the “three high” (high temperature, high density and high salinity) water-based drilling fluid is a worldwide problem due to the combined influence of temperature, solid content and salinity. This paper investigates the factors and regulation methods about rheological property of “three high” water based drilling fluid, and the effects of clay, salinity and weighti...

This work aims to present the Les Avellanes diapir as a field analog inquire how origin, advance, and emplacement of an allochthonous salt body in continental settings influence local sedimentation terms facies distribution, sediment provenance, stratigraphic relationships. At frontal part South-Central Pyrenean fold-and-thrust belt (Spain), is outcropping structure made Triassic evaporites, lu...

The exploitation of natural gas deposits also requires the transport extracted fluids through pipelines to their treatment facilities. Usually contain, in addition methane, ethane, liquid fractions propane, butane, hexane and sometimes salt water associated with deposit. Given that delivery for consumption must be carried out without oil liquids, flow rates extraction wells are taken two-phase ...

DALE, V. H. 1989. Wind dispersed seeds and plant recovery on the Mount St. Helens debris avalanche. Can. J. Bot. 67: 1434-1441. Seed dispersal and plant establishment were monitored for 4 years on the debris avalanche created by the 1980 eruption of Mount St. Helens. The number of plants on the deposit increased over time to a high of almost 2 plants/m 2 by 1983. The number of species per 250-m...

A competitive (2+1)-dimensional model of deposit formation, based on the combination of random sequential absorption deposition (RSAD), ballistic deposition (BD) and random deposition (RD) models, is proposed. This model was named as RSAD1−s(RDfBD1−f )s. It allows to consider different cases of interparticle interactions from complete repulsion between near-neighbors in the RSAD model (s = 0) t...

Computer models must be tested to ensure that the mathematical statements and solution schemes accurately represent the physical processes of interest. Because the availability of benchmark problems for testing density-dependent groundwater models is limited, one should be careful in using these problems appropriately. Details of a Galerkin finite-element model for the simulation of density-dep...

The high temperature oxidation behaviour of Nimonic-115 industrial alloy has been investigated in presence of  NaNO3, Na2CO3 and Na2O2 at 850oC in flowing air. The oxidation kinetics and effect of salt deposition for the period of 48 h were studied. The scale morphologies were determined on the basis of X-ray diffraction anal...