Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"filter cake"”.
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Effects of filtration process variables on filter cake properties and formation
… An alternative approach consists of using the filter cake, which naturally forms against the rock. The overbalanced pressure in the wellbore compared with the formation forces some drilling fluid into the permeable formation, and the solids present in the mud clog the pores of the formation and …
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Characterization of Filter Cake Buildup and Cleanup under Dynamic Fluid Loss Conditions
… a highly concentrated unbroken residue called filter cake which causes permeability impairment in the proppant pack, resulting in low fracture conductivity and decreased effective fracture length. This study seeks to characterize filter cakes. By measuring its thickness and with the leak off …
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Fine-scale modeling of failure in an adhesive layer
Rigid ceramic filter media are used for removing particulate matter from gas streams at high temperatures. As the particulate matter (dust cake) collects on the surface of the filter, the filtration pressure increases; to maintain an economical operation the dust cake must be removed periodically …
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Uso da torta de filtro e do molibdato de potássio em cana-de-açucar
… study aimed to seek knowledge about the use of filter cake and potassium molybdate on morphological variables, technological and productivity. With the management practices adopted in the soil, the filter cake is an excellent organic product for the remediation of soil and moisture retention. …
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Production of biogas from sugarcane wastes: an assessment of microbial community dynamics for an efficient process
… of the four major waste types (straw, bagasse, filter cake and vinasse) would avoid greenhouse gas emissions, air pollution and environmental contamination of soil and water. In order to investigate the feasibility and reliability of biogas production from sugarcane wastes, the microbial …
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A study of fine coal dewatering by high temperature and pressure filtration
… of high temperature and pressure to a filter slurry. This method might have the possibility of replacing conventional thermal dryers for fine coal drying. In addition, the effect of temperature, pressure, dry cycle time, slurry density, cake thickness, and evaporation on filter cake …
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A Comprehensive Methodology For Well Ramp-up of Open Hole Stand-Alone Screen Completions
… of drill-in fluids showed non-uniform filter cake clean-up or presence of “pinholes” resulting in concentrated inflow around the wellbore. A combination of laboratory return permeability tests, CT scans and a developed reduced order model determines the pinhole size and filter cake …
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Strength of drilling fluid filter cakes
… An alternative approach is the idea of using the filter cake that forms against the wellbore rock to create a robust seal, the efficacy of which will depend on cake strength. However, little is currently understood about filter cake strength and how it is impacted by typical particulates in the …
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A Hazard Assessment of a Landfill Site
… landfill site is an open-cast site to which filter cake containing calcium sulfate was deposited as the only known industrial waste. Geological mapping of the site was carried out followed by search bar surveys to determine the area where passive venting of methane, carbon dioxide and …
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Principles and techniques for conditioning of waste-activated sludge by direct slurry freezing
… of compressibility values, by settling, and by filter cake quality when vacuum filtration and gravity drainage on sand beds were utilized. The sludge samples for the principal part of the investigation were obtained from three different sources: two extended aeration plants treating domestic …
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Deposition Thickness Modeling and Parameter Identification for Spray Assisted Vacuum Filtration Process in Additive Manufacturing
… be precisely controlled. A thickness model of filter cakes created through a spray assisted vacuum filtration is presented in this paper, to enable the development of advanced thickness controllers. The mass transfer dynamics in the spray atomization and vacuum filtration are studied for the …
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Admicellar Polymerization to Compatibilize Calcium Carbonate With Oil-Based Drilling Mud
… have a more stable thin film low-permeability filter cake, and exhibit an enhanced overall performance. Pilot mud testing of a surface-modified CC formulated OBM is under way.
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Low oil-water ratio invert emulsion mud for unconventional shale reservoirs
… Ib/100 ft2 and 30 minutes fluid loss of 6ml with filter cake of 1.7 mm. This resulted to 50% reduction in fluid loss over the conventional 70/30 oil-water ratio mud, which was emulsified with the standard emulsifier with stability values of 480 and 393V, plastic viscosity of 31cP, yield point of …
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System considerations in converting sugar mill waste to Bio-CNG
… process. Bagasse, press-mud (also known as filter cake or mill mud), molasses and alcohol by-products are commonly used for various purposes. Specifically, press-mud, one of the by-products is produced in significant volume. Some of this press-mud is utilized by farmers as fertilizer. …
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Advanced Chemical-Mechanical Dewatering of Fine Particles
… should decrease the capillary pressure in a filter cake, which should in turn increase the rate of dewatering and help reduce the cake moisture. The use of the novel dewatering aids causes a decrease in the surface tension of water and an increase in the porosity of the cake, both of which …
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Evaluation of Novel Fine Coal Dewatering Aids
… the Laplace pressure of the water trapped in filter cake and, hence, increase dewatering rate. They were tested on i) the fresh coal samples from Consolidation Coal Corporation's Buchanan Preparation Plant, ii) a composite drill core sample from the Smith Branch Impoundment, Pinnacle Mine …
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A study to characterise the “arsenic rash” observed at a copper smelter in Tsumeb, Namibia
… in the smelter's flues and stacks. The dust is filtered in “bag houses” and the captured powder is transported to Godfrey Roasters where the arsenic trioxide is driven off by heat. From there, the hot roaster gases are collected in what are known as “arsenic kitchens”, where fume is allowed to …