Advanced Materials Research Vol. 402

Abstract: Anti-floating checking calculation is indispensable in the design of buried horizontal tank, in addition to the structure strength and stability to meet the requirements. A new checking calculation method propounded by synthesizing analysis and comparison drawbacks in the several existing anti-floating checking methods, and this method takes into account the effect of different environmental conditions to the anti-floating stability of buried tank. The calculation shows that the new method can effectively improve the anti-floating stability of buried tank. Anti-floating measures must be adopted to prevent tank floating if the anti-floating stability conditions are not being met.

Abstract: Based on the datum of factual measuring to surface observation station in LUJIA mining area, This paper completely analyzes movement and deformation to surface of earth due to repeat extracting in mining, ascertains parameter of movement and deformation to surface of earth in this mining, obtains change tendency of basic parameter to surface of earth in this geological mining condition and basic feature of movement and deformation to surface of earth in repeat mining.

Abstract: Having analyze the stress-strain curve of coal containing gas and their failure types, we draw a conclusion that coupling effect between the Ⅱ failure type of the coal containing gas and high-speed gas seepage leads to the occurrence of gas outburst, which provided theoretical basis for the stress distribution characteristics of coal before heading face and preventing the occurrence of sudden gas outburst. The relationship between the safety width of the distressed zone and the gas outburst danger, and the quality relationship between the safety width of the distressed zone and its influence factors as for a colliery, are both discussed. The result is significant to the prediction of gas outburst in the coal tunnel, the reasonable support for the tunnel and the mine gas drainage.

Abstract: This paper designs real-time distributing measurement and monitoring system based on field bus for meeting the needs of testing and monitoring large-scale oil tanks. The system uses optical fiber sensor to collect the oil tank’s data, and has the advantages of the high precision, the high reliability, the strong anti-disturbed, and the avoiding of fire hidden trouble effectively, by the way of using the industrial Ethernet to achieve long-distance communication by RS-485, with a computer as controlling center to collect the data, and measures, monitors and manages oil tanks intelligently. And then the system is designed according to HART port protocol, as real-time testing and monitoring software to predict and manage automatically with advantages of fault diagnosis, routine maintenance, prediction of fire hidden trouble, and function of reliability, by relieving workload and good economical and social benefit.

Abstract: Gemini benzimidazole cationic surfactant, propanediyl-α, ω-bis-(N-dodecyl benzimidazole ammonium bromide), referred as BIMGCS12-3, was synthesized from the raw materials of benzimidazole, dodecane bromide and dibromopropane. The structure of the target compound was confirmed by HNMR and elemental analysis. Electrochemical behaviors of BIMGCS12-3 for protecting mild steel from sulfuric acid corrosion were issued. Changes in impedance parameters (charge transfer resistance, Rct, and double layer capacitance, Cdl) were indicative of the feasibility of BIMGCS12-3 as excellent mild steel corrosion inhibitor in sulfuric acid.

Abstract: Shale gas reservoirs require a large fracture network to maximize well performance. Microseismic fracture mapping has shown that large fracture networks can be generated in many shale reservoirs. The application of microseismic fracture mapping measurements requires estimation of the structure of the complex hydraulic fracture or the volume of the reservoir that has been stimulated by the fracture treatment. There are three primary approaches used to incorporate microseismic measurements into reservoir simulation models: discrete modeling of the complex fracture network, wire-mesh model, and dual porosity model. This paper discuss the different simulation model, the results provided insights into effective stimulation designs and flow mechanism for shale gas reservoirs.

Abstract: To build a new type of engineering education training mode meet the Chinese national condition. The mode of experience-orientation stress on cultivates engineering spirit and engineering consciousness; acquire engineer experience and skills actively. The eight principles of engineer education are important idea, the credit system, the mentor system, Professional certification system are the foundation of engineering education, under the CDIO background adopt TSIP educational model, encourage and guide the student to learn cross major, interdisciplinary, unify the school and social, unify the class and the scientific research, realizes eminent engineer talent training.

Abstract: Nodal analysis, defined as a systems approach to the optimization of oil and gas wells, is used to evaluate thoroughly a complete producing system. For the systematicness easily ignored during the design of artificial lifting system, based on coordination principle of reservoir, wellbore and lifting equipment, the concept of well performance curves are proposed. With the well performance curves, a new nodal analysis method of artificial lifting system is obtained, which is more efficient. Upstream and downstream pressure of pump and pressure difference provided by pump are displayed in well performance curve, which reflects the property of the well itself. Through further research of well performance curve, the energy of well itself will be fully developed, system effectiveness will be raised, and energy consumption will be reduced.

Abstract: The experiments were conducted in a horizontal multiphase flow test loop (50mm inner diameter, 40m long) and the cross-correlation technology was used for the study of the characteristics of the interfacial wave velocity about two types of annular flow regimes (AN║DO/W and AN║DW/O) for gas-oil-water three-phase flow. The results show that the interfacial wave velocity on the liquid film of AN║DO/W flow pattern and AN║DW/O flow pattern all increases with the increase of gas superficial velocity and liquid superficial velocity on the condition of fixed ratio of oil and water flow rates, but the difference is that the increase is a linear monotonic increase for AN║DO/W flow pattern and a non-linear increase for AN║DW/O flow pattern, and the liquid superficial velocity makes a larger contribution than the gas superficial velocity. The interfacial wave velocity also increases with the increase of input water cut in liquid at different gas superficial velocities under the conditions of liquid superficial velocity fixed.

Abstract: The article analyses the problem in the use of φ4m centrifugal classifier from technology、design、manufacture、repair in detail,etc. It gives the solution from technology and machinery design.