... a lot money and time under meeting the requirement of gas hydrate exploration and resource evaluation. KEY WORDS: gas hydrate; reverse circulation;; dual-wall drilling pipe; drilling equipment and tools; sea water; low- temperature mud; sampling. INTRODUCTION The key for survey and evaluation of gas...

... formulas under different mining conditions. The results show that the farther away from buffer mining collector is, the smaller tilt angle of hose is; and the more difficult solid particles transportation is, the higher critical velocity is needed to avoid pipe clogging, and the more pressure drop...

... Abstract Pump performance of a submersible centrifugal type is investigated experimentally using a multiphase vertical flow loop. Methane in water is tested under turbulent bubbly pipe flows. Some tests are conducted at a three-phase equilibrium point of methane-water-methane hydrate. The pump...

... ABSTRACT The effect of slurry velocity and concentration on the coarse-grained particle-water mixtures flow behavior and pressure drops was studied in horizontal and inclined pipes of inner diameter 100 mm. The study revealed that the coarse-grained particle-water mixtures were significantly...

... pipe omco environmental guideline mining system deflection ocean mining system upstream oil & gas mining system development metals & mining operation Third-Generation Commercial Mining System Development for Manganese Nodules: Direct-to- vs. Incremental-to-5,000-m Approach Jin S...

... precision artificial intelligence parabolic approximation piping design sensor unit approximation projection endpoint fusion information pipe identification pressure sensor electrical engineering piping simulation accelerometer coefficient sensor metals & mining depth...

.... The depth of the sea was about 100m. The lifting system for deep ocean mineral resources includes flexible hoses, lifting pump, buffer, lifting pipes and control/measurements devices. For May and June of 2009, the lifting system was successfully tested. INTRODUCTION Steeply rising oil prices change...

... ABSTRACT: The present paper describes the experimental investigation of model coarse-grained slurry on a re-circulation pipe loop with smooth stainless steel pipes. Graded pebble gravel and glass balls were used as a model for poly-metallic nodules, and very fine glass beads as a model...

... in the vertical pipe. It also analyzes the influence of factors such as particle concentration, diameter, gradation and boundary conditions on single and group suspension velocity. At the same time, it obtains empirical formula of suspension velocity of particle and group particles in vertical lifting...

... of the bathymetry near Kavaratti island The cold water for this land based plant needed a pipe to be deployed to about 300 m water depth in the ocean that was available at about 500 m from the shoreline. A view of the bathymetry near the plant was shown in Fig. 2. High Density Poly Ethylene (HDPE) pipes of 0.63-m...

...) wide in the bottom of the ship hull, this could be opened and closed in mid-ocean. A large, remotely controlled, self-propelled ocean-floor miner with a 5,000-m-long steel pipe system---OD 15-in (38-cm); ID 7.5- in (19-cm)---deployed and retrieved through the moon pool's open door for operation...

... 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...

... on the deep-ocean mining system is mainly focused on static and dynamic analyses of the rigid pipe or flexible hose independently. Although geometrical nonlinear static and dynamic responses of the rigid pipe with free-hanging bottom end were studied by finite element method (Chung,1978; Chung and Felippa...

..., and gradually pulled into the sea water by mining tool. Considering the variable length of the immersed riser, a numerical model is presented to capture the dynamics of the riser with a lumped mass approximation. Discretization scheme for riser and pipe geometry and methodology for calculating the internal...

... drilling operation and the implementation of the next Deep Sea Drilling Project (DSDP) with a 10,000 tons class vessel, Glomar Challenger in 1968. drilling vessel upstream oil & gas penetration reservoir characterization chikyu drilling operation riser pipe drill pipe sea floor...

... and Magnus lift force were included. The collisions between particles as well as between particles and the pipe wall were also simulated. The simulated results show some motion characteristics of nodules in hydraulic hoist. These results agree with the experimental results in general. INTRODUCTION One...

... total integrated mining system (TIS) and control (Brink and Chung, 1980): Ship-, pipe-, buffer- and connection- to-miner and miner, and transshipment (Fig. 1). Surface ship system. Very little in the way of new work can be found in recent surface ship system developments, including the heavy-lift...

... Three-Dimensional DEM Model for Deep-Ocean Mining Pipe System Yan Li, Shaojun Liu College of Mechanical and Electrical Engineering, Central South University Changsha, Hunan, China ABSTRACT A discrete element method (DEM) is proposed for the analysis of deep- ocean mining pipe system based...

... ABSTRACT: The issues of sediment siltation in vertical pipes for hydraulic lifting are frequently encountered in vertical pipes. Most of the proposed formulas had no physical meaning due to lack of comprehensive analysis of impact factors. Based on the experiments on single particle settling...

... virtual prototype active heave compensation system compensation system artificial intelligence heave compensation mining system heave platform ship heave compensation system pipe modeling & simulation hydraulic cylinder platform design target cylinder upstream oil & gas...