Drilling fluids
FucoPol: Studies for drilling fluids design
... based drilling fluids were designed, one using FucoPol and other using guar ...the drilling fluid (Bentonite and Calcium carbonate) were maintained in constant concentrations to compare the response ...
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Rheological Characterization of Bentonite Dispersions with Xanthan for Oil Well Drilling Fluids
... based drilling fluids in order to control their rheological and filtration ...the drilling fluid is closely related to a good transport downhole cuttings to the ...the drilling string due to ...
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Thixotropic evaluation of bentonitic clay dispersions modified with nonionic surfactants for organic drilling fluids (Avaliação tixotrópica de dispersões de argilas bentoníticas modificadas com tensoativos não iônicos para fluidos de perfuração orgânica)
... organic fluids made of organophilic clays have rheological behavior that depends not only on the shear rate (pseudoplastic and dilatant) but also on time, which is known as ...Thixotropic fluids present a ...
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Effect of carboxymethylcellulose on colloidal properties of calcite suspensions in drilling fluids
... A FANN model 35 A rotational viscometer was used to measure the viscosity of the colloidal suspensions. Its design includes a R1 Rotor sleeve, B1 Bob, F1 Torsion Spring, and a stainless steel sample cup for testing ...
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STUDY OF CONTINUOUS RHEOLOGICAL MEASUREMENTS IN DRILLING FLUIDS
... Broussard et al. (2010) developed their own density and viscosity meter; both measurements were done in the same apparatus. Unlike Saasen et al. (2009), the authors compared online measurements directly with offline ones ...
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Adsorption behavior of polymer-based drilling fluids on SiO2.
... POLYMER-BASED DRILLING FLUIDS ON SiO 2. Polysaccharide-based drilling fluids have been often applied in horizontal wells of petroleum reservoirs in Campos, Rio de ...
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Towards the design of new and improved drilling fluid additives using molecular dynamics simulations
... the drilling industry switched their attention from WBDFs to the development of oil based drilling fluids (OBDFs) as a means of controlling reactive ...These fluids proved to be very effective ...
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Effect of carboxymethylcellulose on the rheological and filtration properties of bentonite clay samples determined by experimental planning and statistical analysis (Efeito da carboximetilcelulose nas propriedades reológicas e de filtração de argilas bent
... exchange positions in the inter-layers of the clay minerals, making it sodic. The reduced particle size, high charge, and large surface area of sodic bentonite cause high thixotropy in aqueous dispersions. This, together ...
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Interações entre a carboximetilcelulose, carbonato de cálcio e bentonita: repercussões sobre as propriedades dos fluidos de perfuração aquosos
... water-based drilling fluids is sodium carboxymethylcellulose (Na-CMC), due to some particular characteristics, such as: solubility in water, rheological behavior and adsorption onto clay particle ...
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Assessment of different drill diameter on bone drilling
... numerical drilling parameters, all holes were performed with a drill speed of 600 rpm and feed-rate of ...A drilling depth of 30 mm was set for each diameter. The drilling tests were performed using ...
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Analysis of bone damage during drilling processes
... are drilling [2], sawing [3] and grinding ...bone drilling is one of the most important surgical operation in the medicine history ...bone drilling was called cranial trepanation, which literally ...
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DISCHARGE OF NON-REACTIVE FLUIDS FROM VESSELS1
... Furthermore, to determine the leak or vent flow rate, it is necessary to find several fluid properties at the fluid’s exit point from the vessel, namely, its temperature, pressure, nu[r] ...
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Braz. J. Chem. Eng. vol.33 número1
... and friction pressure loss in the annulus. During un- steady flow, a fluctuation in the BHP can occur. Fig. 8 shows that the BHP rapidly decreases within the first few seconds due to the disappearance of the SPP. ...
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Drilling the Eger Rift in Central Europe
... deep drilling and by an extensive monitoring ...of fluids in this ...of drilling the Eger Rift is to improve the understanding of triggering mechanisms that generate swarm-earthquake ...
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The Campi Flegrei Deep Drilling Project
... this drilling should be comple- , this drilling should be comple- his drilling should be comple- mented by an off-shore site into the caldera center down to the critical point at this position ...
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Theoretical and experimental studies on boiling heat transfer for the zeotropic mixture R-407C
... Zeotropic fluids also have the quality of being distillable, and also the proportion between the fluids can change inside the refrigeration system depending on the thermodynamic ...
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Supercritical fluids in analytical chemistry. III.: applications.
... SUPERCRITICAL FLUIDS IN ANALYTICAL CHEMISTRY III. SUPERCRITICAL FLUID CHROMATOGRAPHY: APPLICATIONS. The first two papers in this series described the basic theory involved in supercritical fluid chromatography ...
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Cuttings-carried theory and erosion rule in gas drilling horizontal well
... In gas horizontal drilling cuttings migrating at high speed could cause great erosion effect on the casing pipe, drill-string and wellbore [1, 2]. A cuttings-carried theory is much needed to modify the critical ...
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Atualização no diagnóstico e tratamento das lesões condrais do joelho.
... abrasão, drilling, microfratura, transplante oste- ocondral autólogo e alógeno e técnicas biológicas como o uso de transplante autólogo de condrócitos, técnica da cartilagem picada (minced cartilage) e o ...
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