paramagnetic solids, or if said solids are purposefully added to it, a magnetic field can also render more permeable filter cakes [13]. In the case of dewatering, the superposition of shear ... which is based on filter cake perme-ability, and a transient-state effect, which is based on filter cake compressibility. In the first case, more porous ...Web
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4, where m is the filter cake mass at the end of filtration, the equation stays the same, only r takes the meaning of r m, i.e., the mass-specific resistance 1, ... In answer to this, it must be said that t/V is much more common …Web
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Filter cake removal. In Petroleum Engineer's Guide to Oil Field Chemicals and Fluids (Second Edition), 2015. 9.10 Special issues 9.10.1 Manganese tetroxide. Manganese tetraoxide Mn 3 O 4 has been recently used as a weighting material for water-based drilling fluids. Mn 3 O 4 has a specific gravity of 4.8 g cm −3.It is used in muds for drilling deep …Web
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A cake filtration apparatus in a structural unit which comprises a plate filter and a filtering aid-dosing device which includes an agitator. The drive parts for rotating the filter unit are disposed on the top wall of the filter housing, and are connected with the drive of the agitator by means of a transmission device and a freewheel coupling.Web
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A method of recovering filter aid particles from a filter cake and the reuse of filter aid particles reclaimed from a filter cake. The method of recovering filter aid particles inWeb
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Filter cake can be defined as the residue that is eliminated during the cane juice decantation process, during the treatment stage, in sugar and/or alcohol production. After the juice treatment decantation stage, the resulting slurry is sent to the filtration sector …Web
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6. ln a filter the combination with a rotating filter leaf of a cake removing element.' adapted to engage the cake and remove it from the leaf by adhesion, said element be ingir .tapered and positioned in true rolling contact with the surface of the cake :torinan 'tio n, and means for imparting movement simultaneously to the element and to the ...Web
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e. said directed steam passed to the filter cake in said zone being at a temperature from about 250 to about 300 F. and the steam is passed at the amount of 50 to 100 Kg. per metric ton of filter cake. 3. The invention defined in claim 2 wherein the dry filter cake is from about 54 inch to 2 inches in thickness.Web
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In the experiments system, in order to understand the formation process of the dust cakes and the effects of variation of the thickness of the dust cake on the pressure drop and collection efficiency, filter papers (Model: Grade GF/A, Pore size: 1.6 µm, Whatman Co., U.K.) were placed at the inlet of the filter chamber, as shown in Fig. …Web
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Filter cake compaction is a common method for mechanical deliquoring of compressible filter cakes. In addition to the conventional squeezing compaction method, applying oscillatory shear to filter cakes at low pressure is an alternative compaction process in cake filtration. While basic differences in terms of compaction success have …Web
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A filter cake deposited on a porous surface is compressed thereagainst by a flexible sheet mounted adjacent the porous surface on the upstream side thereof so that when the filter cake builds up against the sheet it is forced by the hydraulic pressure of the liquid being filtered toward the cake to thereby automatically compress the cake when it becomes …Web
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filter cake mud chamber specimen electrodes Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US589206A Inventor Daniel H Carter Orville R SmithWeb
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moving an imperforate compression member against said cake to compress said cake against said filter element, then sluicing a peripheral portion of said cake with a liquid to remove said peripheral portion from the remainder of said cake, and . thereafter removing the remainder of said cake in a dry cake discharge operation. 2.Web
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Cake filtration is a critical operation in various production pro-cesses, e.g., in food or biotechnology. It is applied to separate the liquid phase of a suspension from the solids, which form a porous filter cake after being deposited on a filter medium. This porous filter cake exerts a resistance to flow, resulting in aWeb
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The organic acid, EDTA after treating filter cakes for 42 hours yielded an 80.98% efficiency, while the nanoparticles, especially Silica dioxide came close to reducing the weight of the filter ...Web
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However, 30 per cent of material that passes through the process is fine-grained clay-based 'filter cake' material which can only be used as a pond lining clay or inert fill. More business newsWeb
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Filter cake plays an important and essential role in stabilizing porous permeable formations. The ideal (thin, tough, impermeable and flexible) filter cake can isolate the wellbore fluids from the pore fluids at the wellbore wall.Web
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the crystallizer to a filter in which the particles are collected as a filter cake. The filter cake, which is 95.0 wt% solid gypsum and the remainder CaSO4 solution, is fed to a dryer in which all water (including the water of hydration in the crystals) is driven off to yield anhydrous (water-free) CaSO4 as product.Web
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US2083578A US745383A US74538334A US2083578A US 2083578 A US2083578 A US 2083578A US 745383 A US745383 A US 745383A US 74538334 A US74538334 A US 74538334A US 2083578 A US2083578 A US 2083578A Authority US United States Prior art keywords cake wax liquid mixture wash Prior art date Legal status (The legal …Web
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The .method of recovering entrained lubricating .oilfrom a .hot filter press cake and simultanenously coolingsaid cakewhich comprises: forcing through said cake .a petroleum solvent which is substantially nonv volatile at the temperature ofthe cake, said solventbeinga petroleum cut intermediate in gravity and viscosity between kerosene and …Web
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This was done to keep the piston from coming into direct contact with the packed rings during the compression experiments. The formed filter cakes were subsequently fixated and compressed in the testing machine. Fig. 5 illustrates the example of an AC filter cake (with height (b) 1.1 cm) with Raschig rings (packing height (c) 0.6 …Web
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filter cake. 1. n. [Drilling Fluids] The residue deposited on a permeable medium when a slurry, such as a drilling fluid, is forced against the medium under a pressure. Filtrate is the liquid that passes through the medium, leaving the cake on the medium. Drilling muds are tested to determine filtration rate and filter-cake properties.Web
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4, where m is the filter cake mass at the end of filtration, the equation stays the same, only r takes the meaning of r m, i.e., the mass‐specific resistance 1, ... In answer to this, it must be said that t/V is much more common …Web
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Treatment of the filter cake layer after drilling is essential for better cement integrity and to retain the original reservoir permeability. Compared to water-based filter cake, oil-based mud filter cake removal is more sophisticated as oil encloses the filter cake's particles. Therefore, oil-based mud clean-up requires wettability alteration …Web
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2 The filter core was assembled into the coreholder of the apparatus of the invention with the shaft guide; 3 The drilling fluid was loaded into the apparatus of the invention for filter-cake formation, according to the steps set forth in Table 2; 4 Testing was done to verify the filter cake was formed satisfactorily;Web
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What is claimed is: 1. A method of removing gelled and dehydrated drilling fluid and filter cake from the walls of a wellbore comprising: contacting said drilling fluid and filter cake with a removal composition for a period of time sufficient to cause the disintegration of said drilling fluid and filter cake, said composition being comprised of an aqueous solution of …Web
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A filter cake was produced with a channeled structure related to the design of the anode mesh, indicating that the cellulose microfibrils were aligned in the direction of the electric field. This was investigated, ... was calculated by dividing a filtrate mass of 5 g by the time required to obtain the said volume and the filter area. 3.5 ...Web
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The slurry flows from the crystallizer to a filter in which the particles are collected as a filter cake. The filter cake is 95.0 wt% solid gypsum and the remainder CaSO4 solution. The filter cake is removed and fed to a dryer in which all water, including the water of hydration in the crystals, is driven off to yield anhydrous (water-free ...Web
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