... that the flow velocity, solid volume concentration and pipe inner diameter have significant impacts on water-hammer pressure. These results can provide references for deep-sea mining system design and safety evaluation. pressure attenuation trend water hammer continuity equation mining system...

...; Fig.1-11- core output hose; Fig.1-12-goose-neck tube; Fig.1-13-dual-way swivel Through theoretical calculation and lab testing, for supplying satisfactory core samples from the sea bottom bed for geologists in time, we plan to design a larger diameter dual- pipe which the outer pipe diameter is 127...

... equilibrium and vapor-aqueous conditions are not very different. diameter rotation speed methane fraction mpa upstream oil & gas production monitoring impellor rotation speed rpm vfl efficiency flow assurance artificial lift system void fraction production logging esp performance...

... in transparent pipe of inner diameter D = 150 mm. Velocities of individual particles of different diameters were measured by radiometric method during vertical mixture flow. Goal of investigation was determining of slip velocities for the artificial nodules of mean diameter d 30 mm during the heterogeneous...

..., 20o and 60o with a bend radius of 5 times the hose diameter for various flow rates. The results of 20o bend angle were compared with the steady state pressure drop values obtained using Computational Fluid Dynamics using FLUENTTM software. The results from the tests were useful in conducting subsea...

... separation seafloor ore separation japan diameter concentration formula consideration Consideration of Seafloor Ore Separation by Slurry Flushing for Seafloor Massive Sulfide Mining T. Yamazaki, Y. Yamamoto, R. Arai and N. Nakatani Osaka Prefecture University Sakai, Japan ABSTRACT Seafloor massive...

... in this study. In the experiment, fine ice particles, the diameter of which was about 0.5 μm, generated by an ultrasonic mist generator, was confined in a reaction cell with pure CO2 gas under the condition of 0.7 MPa and 253 K to form CO2 hydrate. The conversion rate of ice to hydrate was obtained as a time...

... measurement sediment entry pressure fluid migration porosity reservoir characterization kpa porosimeter muddy sediment grain size capillary pressure unconsolidated sediment pore size fine sand sem observation regression line nankai trough diameter Entry Pressure Measurement...

... velocity flow behavior two-layer model pipe bottom nodule flow metering slurry flow production control glass ball flow pattern coarse-grained slurry pressure drop diameter friction pipe chara concentration Flow Behavior of Coarse-Grained Slurries in Pipes Pavel Vlasak1, Zdenek Chara1...

... particle, uniform and non-uniform group particles, there are three kinds of suspension experiments have been done. The testing apparatus is an indoor nodule lifting system with 30-m height and 200-mm inner diameter. This article describes the status of particle and group particles move upward...

... concentration solid particle symmetry vertical distribution university diameter absorption coefficient density profile upstream oil & gas vertical plane pipeline cross-section radiation density distribution flow velocity flotation grain size pipe horizontal pipeline...

... ENERGY PLANT The caisson of the plant had an opening width of 10 m and a water plane area of 67.5 m2. The best hydrodynamic efficiency (based on model studies) can be attained using a turbine diameter of 2 m (Koola, 1990). impulse turbine energy plant chord well guide vane impulse turbine...

... in liquids. In second investigation presented in this paper relations between parameters of falling particles and flowing medium in vertical pipeline have been presented. Between others, drag coefficients have been determined in function of particles diameter and flow velocity in a vertical pipeline. Foamed...

... surface. manganese nodule artificial lift system characteristic curve lifting pipe lifting motor pump nodule mining test lifting pump comra diameter metals & mining lifting technology stage lifting pump requirement cross-section lifting method impeller concentration upstream...

... of analyses of head loss and slip velocity changes in function on concentration of solids in mixture, diameter of the pipe and diameter of solids. KEY WORDS: Multiphase flow, mathematical model of flow, two- phase mixtures. INTRODUCTION Transport in pipelines belong to for years intensively developed methods...

... system maintenance displacement sagami bay diameter abt upstream oil & gas significant wave height capacity abt riser pipe impeller takumi university density current small waterplane area current generator wind project area wave period Three Years Operation of Ocean Nutrient...

... sampler multiple corer sediment inner pressure corer specimen tube petal catcher diameter deep-sea pressure tight multiple wire rope drilling operation Research on Deep-sea Pressure Tight Multiple Coring Technique Liang Zhu1, Linyi Gu1, Huawei Qin1, Shilun LiI1, Ying Chen1, Guanghai Wu2 1The...

... result formula concentration upstream oil & gas particle critical velocity fluid velocity diameter pipe shape coefficient reservoir surveillance experiment production control vertical pipe production monitoring vertical hydraulic lifting system Experiment Study on Critical Velocity...

... independent from drilling machine is highly desired for gas hydrate pressure core sampler soil horizon drilling operation dicken paull corer pressure lever core tube experiment piston corer accumulator upstream oil & gas hydrate area pressure piston corer diameter novel pressure...

... of solid phase in vertical pipe lifting. They concluded that solid phase distribution was related to solid slip velocity, gas velocity gradient, particle rotation velocity, particle diffusion coefficient and particle diameter, and developed a most complicated formula. production monitoring...