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Journal articles on the topic 'Multistage technology'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Zuo, Zhi Jiang, J. J. Yang, and L. R. Fu. "The Technology of Multistage Extrusion for Thin Walled Brass Cylinder." Applied Mechanics and Materials 217-219 (November 2012): 1934–37. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1934.

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This paper analyzed the structure of the thin walled brass cylinder, calculated the deformation degree and extrusion ratio, and designed the multistage cold extrusion process. According to the cold extrusion process, the multistage extrusion mold structure and transfer device were designed. Compared with the stamping process, multistage cold extrusion process has high material utilization, high efficiency, small investment in equipment and other advantages of high strength, high precision and small surface roughness in parts production.

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2

Chakravarty, Amiya K., and Avraham Shtub. "NEW TECHNOLOGY INVESTMENTS IN MULTISTAGE PRODUCTION SYSTEMS." Decision Sciences 16, no. 3 (July 1985): 248–64. http://dx.doi.org/10.1111/j.1540-5915.1985.tb01678.x.

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3

Xue, Ren Jiang, Jian Chun Guo, Wei Ting Fan, and Pei Dong Zhang. "Study and Application on Hydrajet Multistage Fracturing Technology." Applied Mechanics and Materials 433-435 (October 2013): 1965–68. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1965.

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Hydrajet fracturing has the advantages which not only include perforating without compacted zone, creating fracture exactly, but also include controlling fracture height, shortening the working cycle, reducing operation risk and etc.[. Through studying the optimization of nozzle materials and combination, string structure, operation pressure of surface casing and annular displacement, the hydraulic jet multistage fracturing technology is formed. This technology is successfully used and proves it has good popularization and application.

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4

Davydov, A. B., and A. N. Sherstyuk. "Multistage turbine expansion engines." Chemical and Petroleum Engineering 35, no. 9 (September 1999): 516–20. http://dx.doi.org/10.1007/bf02365979.

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5

JPT staff, _. "Technology Updatae: New Methods Boost Multistage Fracturing in Horizontals." Journal of Petroleum Technology 59, no. 07 (July 1, 2007): 28–30. http://dx.doi.org/10.2118/0707-0028-jpt.

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6

Sui, Xiu Hua, De Jun Miao, and Zheng Mao Feng. "Design and Study of Heavy Tipper Multistage Hydraulic Cylinder Based on CAD/CAE." Advanced Materials Research 139-141 (October 2010): 1122–25. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1122.

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The hydraulic cylinder is an actuator of hydraulic lifting system in the heavy tipper, which also plays an important role in unloading. Aiming at the existing multistage hydraulic cylinder design method's insufficiency, the CAD/CAE technology is introduced into the domains of multistage hydraulic cylinder design. In this paper push-forwarding five-stage hydraulic cylinder is designed, and virtual assembly is established based on three-dimensional digital model using PRO/E sofeware. The multistage hydraulic cylinder's load-supporting characteristics are analyzed by ANSYS. The result of finite element analysis shows that the stress on the top front part of three down hydraulic cylinder is biggest, those on the trunnion and the cylinder's bottom are also bigger. It is also proved that the multistage hydraulic cylinder designed with CAD/CAE technology can satisfy the requirements of intensity, rigidity and supporting stability.

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7

Ohgai, T., Y. Oguchi, K. Ohno, T. Kamei, Y. Magara, and M. Itoh. "Development of evaluation methods to introduce a nanofiltration membrane process in drinking water treatment." Water Supply 6, no. 2 (March 1, 2006): 9–17. http://dx.doi.org/10.2166/ws.2006.042.

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The objective of this study was to develop a new prediction method for evaluating performance of full-scale nanofiltration (NF) pilot plant by using small-scale pilot plants. Operating experiments using both multistage array pilot plant and two small-scale pilot plants in parallel had been conducted for about a year. From this experiment, it was revealed that data obtained from small-scale pilot plants could predict the performance of multistage pilot plant from the viewpoint of flux and rejection. In other words, both permeate water quantity of multistage pilot plant without noticeable fouling caused by aluminium from coagulant and permeate water quality of multistage pilot plant could be estimated.

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8

OKAYAMA, Shigeo. "High-Precision Alignment Technology for Multistage Quadrupole Correction-lens System." Journal of the Japan Society for Precision Engineering 81, no. 2 (2015): 193–96. http://dx.doi.org/10.2493/jjspe.81.193.

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9

Zhao Xin, 赵馨, 董岩 Dong Yan, 刘洋 Liu Yang, 宋延嵩 Song Yansong, and 常帅 Chang Shuai. "Optical Phase Locked Loop Technology Based on Multistage Compound Loops." Acta Optica Sinica 38, no. 5 (2018): 0506002. http://dx.doi.org/10.3788/aos201838.0506002.

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10

Zulfin, Muhammad, S. Suherman, Rahmad Fauzi, M. Razali, and Maksum Pinem. "Cross-Point Comparison of Multistage Non-Blocking Technologies." International Journal of Engineering & Technology 7, no. 3.2 (June 20, 2018): 703. http://dx.doi.org/10.14419/ijet.v7i3.2.15348.

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Multistage switching networks play important role in communication and computer network. They make communication nodes connect to each other. In computer hardware switches connect processors and memories. Initially, switches are arranged as one stage interconnection. As clients are growing, multistage is a must. The finding Clos multistage switching initiated multistage technologies. Benes improves Clos by reducing number of cross-points by using a 2 x 2 switch element and call re-routing. Batcher improves the technology by other way which is sorting destination address. Banyan is then joined to Batcher to simplify routing control. This paper analyses the number of cross-point required in Clos, Benes and Batcher Banyan to accomplish multistage switching architecture of 16, 64, 256, 1024 and 2048 input/output ports. As results, Clos cross-point is in averages 495.24% higher than Benes and 160.30% higher than Batcher Banyan. Clos blocking probabilities are closed to zero. Benes blocking probabilities are conditionally zero. Batcher Banyan blocking probabilities are zero.

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11

Yang, Xinghua, Yue Xing, Fei Qiao, and Huazhong Yang. "Multistage Latency Adders Architecture Employing Approximate Computing." Journal of Circuits, Systems and Computers 26, no. 03 (November 21, 2016): 1750039. http://dx.doi.org/10.1142/s0218126617500396.

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This paper proposed an energy efficient adder employing multistage latency and approximate computing technology. The delay of the adder decreases after the critical path of the adder is divided into multiple short stages with series of predictors, then the approximate computing technology is exploited to make a tradeoff between output quality and energy efficiency. The proposed design is applied into discrete cosine transformation (DCT) in image processing and support vector machine (SVM) algorithm in machine learning to verify its availability, the simulation results demonstrate that the proposed approximate adder provides 25.6% power-delay-product (PDP) reduction and 2 orders of magnitude reduction in output error than the recent counterpart designs. Compared with the conventional accurate ripple carry adder (RCA) and Kogge stone adde (KSA), the proposed design presents 66.5% to 37.6% PDP reduction, at the cost of negligible output quality reduction, which are qualified as peak signal-to-noise ratio (PSNR) for DCT (decreases from 33.88dB to 33.84dB) and classification accuracy for SVM (decreases from 80.46% to 79.19%).

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12

Grokhovskii, D. V. "Optimum design of centrifugal multistage pumps." Chemical and Petroleum Engineering 21, no. 1 (January 1985): 5–7. http://dx.doi.org/10.1007/bf01148289.

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13

Zhang, Zhiyong, Xiaolan Lv, Feng Ma, Kai Wei, and Kai Li. "Application of multistage acid fracturing technology in deep carbonate thermal reservoirs." Journal of Physics: Conference Series 2351, no. 1 (October 1, 2022): 012018. http://dx.doi.org/10.1088/1742-6596/2351/1/012018.

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As the most common stimulation treatment in carbonate reservoirs, acid fracturing is also frequently used in carbonate geothermal wells, but it has not been applied in deep carbonate thermal reservoirs. The application of a multi-stage acid fracturing technology in Xiong’an deep carbonate thermal reservoir is introduced in this paper. The field application of technology has achieved a good stimulation effect. Multistage acid fracturing technology can effectively communicate the aquifer of carbonate thermal reservoir, improve the length of acid corrosion fracture, increase the conductivity of thermal reservoir and improve the water yield of a geothermal well. The technology is worthy to be popularized.

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14

Qian-bei, Yue, Wang Xiao-xiao, Liu Yue-qiu, Cao Wen, and Zhang Qiang. "Failure evaluations for packers in multistage fracturing technology with immobile strings." Journal of Petroleum Science and Engineering 206 (November 2021): 109039. http://dx.doi.org/10.1016/j.petrol.2021.109039.

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15

JIANG, Tingxue, and Xiaobing BIAN. "Multistage circuitous-temporary plugging fracturing technology for deep oil-gas reservoirs." Journal of Shenzhen University Science and Engineering 38, no. 06 (November 1, 2021): 590–97. http://dx.doi.org/10.3724/sp.j.1249.2021.06590.

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16

Malik, A., S. Naveed, and Z. Nawaz. "Suitability of multistage enthalpy extraction technology for power plants in Pakistan." Journal of the Energy Institute 80, no. 3 (September 1, 2007): 149–52. http://dx.doi.org/10.1179/174602207x239999.

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17

Cheng, Ning, Kaifeng Kang, Jianming Li, Tao Liu, and Kun Ding. "A New Numerical Simulation technology of Multistage Fracturing in Horizontal Well." IOP Conference Series: Earth and Environmental Science 94 (November 2017): 012061. http://dx.doi.org/10.1088/1755-1315/94/1/012061.

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18

Al-Wazzan, Yousef, and Faisal Al-Modaf. "Seawater desalination in Kuwait using multistage flash evaporation technology — historical overview." Desalination 134, no. 1-3 (April 2001): 257–67. http://dx.doi.org/10.1016/s0011-9164(01)00133-3.

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19

Dan-Abia, Dan E., Akaninyene Obot, and Kufre M. Udofia. "Design and Analysis of a Multistage Common Emitter Amplifier for Low Frequency Applications." European Journal of Engineering Research and Science 4, no. 10 (October 19, 2019): 87–92. http://dx.doi.org/10.24018/ejers.2019.4.10.1431.

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The design and analysis of the multistage common emitter (CE) amplifier for improved voltage gain over the single stage CE amplifier is presented in this paper. The design procedure started with the design of a single stage CE amplifier. The design specifications for the CE amplifier were specified. The design of the multistage CE amplifier was done using the designed single stage CE amplifier as the basic configuration. The designed single stage and multistage CE amplifiers were simulated in the linear technology simulation program with integrated circuit emphasis (LT SPICE). The results obtained show that using analytical method a voltage gain of 45 dB was obtained for the single stage and 54 dB was obtained for the multistage respectively, the LT SPICE simulation software presented a result of 44 dB for the single stage and 54 dB for the multistage. The proposed amplifier may find suitable applications in devices operating in the low frequency such as audio signal applications. Furthermore, judging from these results coupling of more stages of the transistor amplifier to obtain greater voltage, current and power gains is recommended.

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20

Dan-Abia, Dan E., Akaninyene Obot, and Kufre M. Udofia. "Design and Analysis of a Multistage Common Emitter Amplifier for Low Frequency Applications." European Journal of Engineering and Technology Research 4, no. 10 (October 19, 2019): 87–92. http://dx.doi.org/10.24018/ejeng.2019.4.10.1431.

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The design and analysis of the multistage common emitter (CE) amplifier for improved voltage gain over the single stage CE amplifier is presented in this paper. The design procedure started with the design of a single stage CE amplifier. The design specifications for the CE amplifier were specified. The design of the multistage CE amplifier was done using the designed single stage CE amplifier as the basic configuration. The designed single stage and multistage CE amplifiers were simulated in the linear technology simulation program with integrated circuit emphasis (LT SPICE). The results obtained show that using analytical method a voltage gain of 45 dB was obtained for the single stage and 54 dB was obtained for the multistage respectively, the LT SPICE simulation software presented a result of 44 dB for the single stage and 54 dB for the multistage. The proposed amplifier may find suitable applications in devices operating in the low frequency such as audio signal applications. Furthermore, judging from these results coupling of more stages of the transistor amplifier to obtain greater voltage, current and power gains is recommended.

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21

Aleksandrov, V. Yu, and K. K. Klimovskii. "Optimization of multistage gas ejectors." Thermal Engineering 56, no. 9 (September 2009): 790–94. http://dx.doi.org/10.1134/s0040601509090146.

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22

Tweedt, Daniel L., Michael D. Hathaway, and Theodore H. Okiishi. "Multistage compressor stator/rotor interaction." Journal of Propulsion and Power 1, no. 6 (November 1985): 449–55. http://dx.doi.org/10.2514/3.22827.

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23

Yehia, Omar R., Christopher B. Reuter, and Yiguang Ju. "Low-temperature multistage warm diffusion flames." Combustion and Flame 195 (September 2018): 63–74. http://dx.doi.org/10.1016/j.combustflame.2018.03.013.

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24

Kusumocahyo, S. P., R. C. Redulla, K. Fulbert, and A. A. Iskandar. "Process design and simulation of industrial-scale biodiesel purification using membrane technology." IOP Conference Series: Earth and Environmental Science 963, no. 1 (January 1, 2022): 012003. http://dx.doi.org/10.1088/1755-1315/963/1/012003.

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Abstract Biodiesel is commonly produced through a transesterification reaction of vegetable oil with alcohol in the presence of a catalyst to produce fatty acid methyl ester (FAME). The reaction also produces glycerol as a by-product that must be separated from the FAME to obtain a biodiesel product that meets international standards. The common method to remove glycerol from FAME is washing with water. However, it produces a vast amount of wastewater and consumes much energy. Membrane technology is a promising separation technique for removing glycerol from biodiesel on an industrial scale since the separation using membrane does not produce wastewater and the energy consumption is low. In this work, the application of membrane technology to separate biodiesel and glycerol was studied through a process design and simulation of an industrial scale biodiesel purification process with a production capacity of 723 kL/day. A multistage feed-and-bleed microfiltration membrane system was designed to purify biodiesel from glycerol, and the process simulation was carried out using computer programming. The result of the process simulation showed that purified biodiesel could be produced by using the multistage microfiltration membrane system. The minimum membrane area required for the separation process in each stage could be calculated using the computer program. It was found that the total membrane area decreased with the increasing number of stages. A reduction of the total membrane area of 37% was achieved using ten stages microfiltration system. The optimum number of the stages could be determined through a tradeoff analysis of the cost to minimize the capital cost of the multistage membrane system. For the case study in this work, a stage number of 4 was found as the optimum stage number of the microfiltration system. This result showed that the membrane technology has great potential to be applied for the industrial-scale biodiesel purification process.

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25

Kulshreshtha, Abhijit, and Abdulkareem Sh Mahdi Al-Obaidi. "Stealth Detection System via Multistage Radar and Quantum Radar." Indonesian Journal of Science and Technology 5, no. 3 (December 1, 2020): 470–86. http://dx.doi.org/10.17509/ijost.v5i3.26806.

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In today’s era of advanced weapons and technology development, many remarkable inventions have shifted the balance of war towards the strategically enhanced military equipped with tactical weapons and armaments. One of these strategic advancements is stealth technology due to which stealth aircraft are high in demand for the military. The question that rises is How to detect a stealth object? This paper proposes a novel anti-stealth technique using void detection, high frequency wave interference and neutrino beam propagation. Void detection method uses a modified satellite-based radar that searches for areas in the aerospace from which the transmitted signals sent to the ground receiving station are blocked or deflected. High frequency wave interference method is used to generate a stellar trajectory of the stealth aircraft at the detected void. Neutrino beam comprises of energy quanta mainly neutrinos, which are able to surpass the absorption or deflection systems in the stealth body of aircraft. This unique phenomenon produces a moving image, which is the precise location of the aircraft in the space. Using these methods, the trajectory of the aircraft is detected which ultimately leads to the detection of the stealth aircraft itself. The newly proposed methods which are theoretically more reliable than the existing methods may not have been tested but the method planning make them practically feasible considering that the technology used is a part of advanced engineering today.

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26

Lin, Gwo-Fong, and Fong-Chung Lee. "Multistage disaggregation processes in stochastic hydrology." Water Resources Management 6, no. 2 (1992): 101–15. http://dx.doi.org/10.1007/bf00872206.

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27

Volodin, V. M., and N. V. Mokrova. "Modeling of decomposition control of multistage process." Chemical and Petroleum Engineering 43, no. 1-2 (January 2007): 92–95. http://dx.doi.org/10.1007/s10556-007-0017-9.

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28

Li, Yi, Dong Liu, Bo Wang, and Xin Ming Li. "Research on Authentication-Based Security Technology for Complex Networks." Applied Mechanics and Materials 232 (November 2012): 701–5. http://dx.doi.org/10.4028/www.scientific.net/amm.232.701.

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The concept of authentication network is proposed to solve the security problems of complex network. The basic idea of authentication network is to ensure that everything of network must be authenticated. The technologies about authentication node, including the trusted root and trusted chain are studied. The security technologies about authentication networks, including trusted transmission, distributed and tree authentication management, multistage and multilayer access control strategy are also researched. At last, the security abilities of authentication network are analyzed.

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29

Pakhotina, Iuliia, Shohei Sakaida, Ding Zhu, and A. Daniel Hill. "Diagnosing Multistage Fracture Treatments with Distributed Fiber-Optic Sensors." SPE Production & Operations 35, no. 04 (November 1, 2020): 0852–64. http://dx.doi.org/10.2118/199723-pa.

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30

Chen, Yu Hui, Yong Zhang, Min Sheng Huang, Yi Fan Zhang, Feng Zhao, and Jin Hong Luo. "Ecological Restoration by a Multistage Floating-Bed System in a Eutrophic Urban River, China." Applied Mechanics and Materials 157-158 (February 2012): 945–49. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.945.

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By constructing a multistage floating-bed system by combination of macrophytes, aquatic animals and aquamats ecobase for ecolgical restoration in a eutrophic urban river, the improvement of water quality and the dynamic variation of phytoplankton was investigated. The results showed that the average removal rates were 9.85%, 15.86%, 24.47% and 12.75%, respectively. phytoplankton quantity was decreased by 22.82×104ind./L and Shannon-Weiner Index was increased by 0.11 averagely, after the restoration work in the demonstration area comparing to control area. The negative correlation between Shannon-Weiner Index of phytoplankton and TN(-0.77, P<0.01) showed that multistage system might effect phytoplankton indirectly through removing nutrients from river, which indicated that the employment of ecological restoration technology of multistage floating-bed system was effective in raising the ecological recovery efficiency of polluted water bodies.

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31

Cheng, Xuan, Shoutian Chen, Wu Ouyang, and Yan Zhang. "Application of Direct-driven Multistage Supercharging Technology in Water Jet Propulsion Devices." Journal of Physics: Conference Series 1846, no. 1 (March 1, 2021): 012093. http://dx.doi.org/10.1088/1742-6596/1846/1/012093.

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32

Khalturin, E. A. "Improving the technology of multistage fracturing and re-fracturing in lateral wells." Neftyanoe khozyaystvo - Oil Industry, no. 9 (2017): 44–46. http://dx.doi.org/10.24887/0028-2448-2017-9-44-46.

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33

Benaroch, Michel, Sandeep Shah, and Mark Jeffery. "On the Valuation of Multistage Information Technology Investments Embedding Nested Real Options." Journal of Management Information Systems 23, no. 1 (June 2006): 239–61. http://dx.doi.org/10.2753/mis0742-1222230108.

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34

Matsuya, Y., K. Uchimura, A. Iwata, and T. Kaneko. "A 17 bit oversampling D-A conversion technology using multistage noise shaping." IEEE Journal of Solid-State Circuits 24, no. 4 (1989): 969–75. http://dx.doi.org/10.1109/4.34079.

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35

Kinnear, W. J. "High reliability multistage mine dewatering pumpsets." International Journal of Mine Water 7, no. 2 (June 1988): 7–18. http://dx.doi.org/10.1007/bf02505833.

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36

Wang, Xuemin, Ming Liu, Haochen Yu, Hang Zhang, Sihao Yan, Cui Zhang, and Shuangxi Liu. "Oxygen-deficient 3D-ordered multistage porous interfacial catalysts with enhanced water oxidation performance." Journal of Materials Chemistry A 8, no. 43 (2020): 22886–92. http://dx.doi.org/10.1039/d0ta08460c.

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Constructing ordered multistage pore structures and controllable defects is accepted as an effective strategy to optimize the activity and stability of catalysts, but it is still restricted by synthesis technology.

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37

Aleksandrov, Vadim, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, and Irina Bulgakova. "Microseismic Multistage Formation Hydraulic Fracturing (MFHF) Monitoring Analysis Results." Key Engineering Materials 785 (October 2018): 107–17. http://dx.doi.org/10.4028/www.scientific.net/kem.785.107.

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Microseismic monitoring of hydrocarbon fields is one of the promising areas of modern seismology. In recent years, the methodology of microseismic monitoring for seismic emission has been actively developing in the oil and gas industry in order to study the impact of various technogenic processes on the hydrocarbon (HC) fields being developed. The technology does not require powerful sources of sounding signals, but uses constantly existing weak seismic fields of artificial or natural origin. During the development of the field, periodic monitoring of the intensity and spatial position of the zones of microseismic activity allows controling the behavior of HC deposits in order to optimize their development. Distinctive features of this technology are high mobility, fast deployment time, high resolution, and low cost of receiving, transferring and processing of microseismic data. The purpose was to analyze the results and evaluate the effectiveness of MFHF using microseismic monitoring of seismic emission processes. The results were obtained with the help of quantitative microseismic monitoring of seismic foci occurring successively near the well ports at different times during MFHF.

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38

Gamache, R. N., and E. M. Greitzer. "Reverse flow in multistage axial compressors." Journal of Propulsion and Power 6, no. 4 (July 1990): 461–73. http://dx.doi.org/10.2514/3.25458.

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39

Zhang, Q. Y., and B. Q. Chai. "Hydraulic Characteristics of Multistage Orifice Tunnels." Journal of Hydraulic Engineering 127, no. 8 (August 2001): 663–68. http://dx.doi.org/10.1061/(asce)0733-9429(2001)127:8(663).

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40

Kumar, Pradumn. "Working Analysis of Multistage Cloud Security Algorithms." International Journal for Research in Applied Science and Engineering Technology 10, no. 1 (January 31, 2022): 1327–29. http://dx.doi.org/10.22214/ijraset.2022.40028.

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Abstract: The security of Cloud computing has been a quickly developing administration which has numerous highlighted services over internet which reduces the cost and operating expenses. The greatest favorable position of cloud administrations is that one can work online in the cloud, whenever the term online comes it automatically concerns about data security. Cloud security gives better approaches for conveying security arrangements till now. In cloud storage we require security for the data so we will encrypt our data into cipher text before uploading and whenever we want access just decrypt cipher text with security policies. In this paper we are analyzing the symmetric encryption algorithm with asymmetric algorithm like DES, RSA and AES, IDEA, Blowfish etc to provide security to cloud data from attackers. By this encryption technique economically allows cloud access. Keywords: AES, 3DES, RSA, DES, BLOWFISH, IDEA, CRYPTOGRAPHY

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41

Gel'fand, B. E., S. M. Frolov, and S. A. Tsyganov. "Origination of detonation during multistage self-ignition." Combustion, Explosion, and Shock Waves 25, no. 4 (1990): 466–72. http://dx.doi.org/10.1007/bf00751557.

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42

Wu, Jin Jun, Li Cai Liu, Guo Hua Zhao, and Xiao San Chu. "Design Research on the Composite Process of Consecutive Perforation-Strong Pulse Fracturing for Multiple Oil Layers and Thick Interlayer." Advanced Materials Research 482-484 (February 2012): 343–46. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.343.

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Currently, most of Chinese oil companies have getting in the later production period, the oil wells are processed frequently and the cost is increasing. In view of the higher problems existed popular in the oil fields such as multiple layers, big interlayer, the technology composited perforation and high energy gas fracturing has to construct with every layer alone, operate long time, cost high. The author puts forward the design research on the composite process of consecutive perforation-strong pulse fracturing for multiple oil layers and thick interlayer This paper introduces the basic design principle and technology method. The design is realized by using the technology of the perforation-symmetrical overpressure fracturing technology, the multi-pulse multistage fracturing, to efficiently guarantee the effect of perforating and pulse fracturing in every layer. The designed multistage detonating device makes the once completed construction technology used in the single well of the multiple oil layers with big interlayer come true. The field test application has gained good effects, greatly reduced the construction cost, and also promoted the application and generalization of the technology composited perforation and high energy gas fracturing.

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43

Yan, Zhou, Hany Hassanin, Mahmoud Ahmed El-Sayed, Hossam Mohamed Eldessouky, JRP Djuansjah, Naser A. Alsaleh, Khamis Essa, and Mahmoud Ahmadein. "Multistage Tool Path Optimisation of Single-Point Incremental Forming Process." Materials 14, no. 22 (November 11, 2021): 6794. http://dx.doi.org/10.3390/ma14226794.

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Single-point incremental forming (SPIF) is a flexible technology that can form a wide range of sheet metal products without the need for using punch and die sets. As a relatively cheap and die-less process, this technology is preferable for small and medium customised production. However, the SPIF technology has drawbacks, such as the geometrical inaccuracy and the thickness uniformity of the shaped part. This research aims to optimise the formed part geometric accuracy and reduce the processing time of a two-stage forming strategy of SPIF. Finite element analysis (FEA) was initially used and validated using experimental literature data. Furthermore, the design of experiments (DoE) statistical approach was used to optimise the proposed two-stage SPIF technique. The mass scaling technique was applied during the finite element analysis to minimise the computational time. The results showed that the step size during forming stage two significantly affected the geometrical accuracy of the part, whereas the forming depth during stage one was insignificant to the part quality. It was also revealed that the geometrical improvement had taken place along the base and the wall regions. However, the areas near the clamp system showed minor improvements. The optimised two-stage strategy successfully decreased both the geometrical inaccuracy and processing time. After optimisation, the average values of the geometrical deviation and forming time were reduced by 25% and 55.56%, respectively.

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Sun, Qingfeng. "Research and application of water flooding injection and production technology after polymer flooding." E3S Web of Conferences 358 (2022): 02031. http://dx.doi.org/10.1051/e3sconf/202235802031.

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For reservoir water flooding after polymer flooding injection points existing in the mining process of high temperature resistant performance is poor and multistage unlock difficulty, examination, and the sealing problems such as in-depth study and analysis, innovation to a new set of return to spit points injection points production technology, to produce more suitable sealing high voltage can be found on a variety of well conditions return to spit points a column technology, is helpful for better improvement points injection tube service life, At the same time, it can effectively solve the problem of clogging downhole concentric test and adjustment unit. Oilfield exploration into the follow-up after water flooding stage, the well will show the water fast, fast production decline, the characteristics of a return so often need to take back to spit on mining technology, but the technology has high pressure resistance and multistage unlock difficulty problem, makes the life of the mining process is shorter, so according to the technical problems existing in the in-depth study and analysis, The effective outcome measures are put forward to provide necessary technical support for reservoir benefit after polymer flooding.

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Feder, Judy. "Multilateral Offshore Well Completed With Multistage Proppant Fracturing." Journal of Petroleum Technology 72, no. 05 (May 1, 2020): 68–69. http://dx.doi.org/10.2118/0520-0068-jpt.

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Carpenter, Chris. "Study Summarizes 20 Years of Horizontal Multistage Completions." Journal of Petroleum Technology 74, no. 04 (April 1, 2022): 60–62. http://dx.doi.org/10.2118/0422-0060-jpt.

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This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 207698, “Twenty Years of Horizontal Multistage Completions: A Summary of Industry Evolution in Unconventional and Conventional Plays,” by Alberto Casero, SPE, BP. The paper has not been peer reviewed. The innovative idea behind the shale gas revolution was the combination of horizontal well drilling and hydraulic fracturing, which allowed for an increase in the surface area available for hydrocarbon flow and overcame the slow, shallow hydrocarbon release from the source rock. To achieve the high number of hydraulic fractures needed for economical production, different execution techniques evolved in what became known as horizontal multistage fracturing (HMSF) completions. The complete paper covers the most-common types of HMSF completion systems and includes a section about the use of these completions in conventional plays. This synopsis focuses on HMSF use in unconventionals. Well Architecture as a Function of Location and Reservoir Properties As hydraulic fracturing and horizontal wells became popular, many preconceptions associated with hydraulic fracturing had to be reimagined. The concept of stimulated reservoir volume (SRV) was introduced; contacting as much rock as possible was the new priority of hydraulic fracturing, while more-conventional fracturing concepts such as fracture conductivity and planar fractures became secondary or irrelevant. Fracture-production interference and fracture complexity became an aim rather than representing a risk. Very high fracture count and reduced well spacing became a necessity, and, inevitably, a mass-production approach had to be applied rather than an individual fit-for-purpose design for each well or fracture. These changes brought a substantial shift in primary well-construction costs, with completion costs in many cases surpassing the drilling cost by a factor of 40–50%. Multistage fracturing with complex and developed fracture networks or SRV, which is at the basis of unconventional developments, requires a robust infrastructure and resource availability to allow easily moving large amounts of proppant (typically natural sands) and water. This can be challenging for remote locations. When permeability decreases, cased and perforated completions with hydraulic fracturing or acid stimulations become the norm. When permeability decreases even further, multistage fractures and horizontal wells are applied; finally, in ultratight gas and shale gas, horizontal multistage fracturing represents the only option.

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Ren, Ming Yuan. "Design and Simulation of Low-Power Multistage Amplifiers." Advanced Materials Research 378-379 (October 2011): 655–58. http://dx.doi.org/10.4028/www.scientific.net/amr.378-379.655.

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This paper presents a low-power multistage amplifier with a novel capacitor-multiplier frequency compensation (CMFC) technique. The proposed compensation strategy can allow the circuit to occupy less silicon area and to drive large capacitive loads more effectively. Moreover, smaller physical capacitance results in higher gain-bandwidth product (GBW) and improved transient responses. Furthermore, the capacitor multiplier stage (CMS) embedded in CMFC creates a left-half plane (LHP) zero, which boosts the phase margin and enhances the stability of the amplifier. Implemented in a commercial 0.5-μm CMOS technology and driving 500pF capacitive load, a three-stage CMFC amplifier achieves over 120dB gain, 1.699MHz GBW and 1.625V/μS average slew rate, while only dissipating 330μW under 3.3V supply.

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Li, Bao Liang, Zhi Shun Yan, and Xiao Wei Hu. "Numerical Simulation and Performance Prediction for Hydraulic Performance of Mine Drainage Pump." Applied Mechanics and Materials 281 (January 2013): 216–20. http://dx.doi.org/10.4028/www.scientific.net/amm.281.216.

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By using the CFX technology in ANSYS Workbench, based on the different operation conditions, the numerical simulation of three dimension steady turbulent flow is carried on the D type mine drainage pump. The pump includes first impeller and guide vane, secondary impeller and guide vane, inlet, outlet. The results will reveals the distribution law of flow field and static pressure, and it further forecasts the performance curve of the multistage pump by means of choosing standard model and setting frozen interface. This method can provide certain theory basis for the energy saving work of the multistage pump.

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Elizarov, D. V., V. I. Elizarov, and T. S. Kamaliev. "Method for Approximate Calculation of Multistage Liquid Extraction." Chemical and Petroleum Engineering 49, no. 7-8 (November 2013): 429–34. http://dx.doi.org/10.1007/s10556-013-9768-7.

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Li, X. J., H. F. Zhao, C. S. Liu, Y. G. Xiong, J. L. Lan, and H. Han. "The influence of roof lithology on the fracture propagation of horizontal well multistage fracturing in the roof of broken soft coal seams." IOP Conference Series: Earth and Environmental Science 1124, no. 1 (January 1, 2023): 012029. http://dx.doi.org/10.1088/1755-1315/1124/1/012029.

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Abstract Horizontal well multistage fracturing in the roof of broken soft coal seams has been demonstrated to be an effective technique to extract coalbed methane (CBM). However, fracture propagation behaviours under this technology vary significantly with different roof lithologies. Therefore, the influence of roof lithology on fracture propagation was investigated in this study. Based on the No. 5 and No. 11 coal seams in the Hancheng block of the Ordos Basin in China, field tests of horizontal well multistage fracturing in the sandstone and mudstone roof of crushed soft coal seams were performed and fractures were detected by microseismic monitoring. Corresponding hydraulic fracturing physical simulation experiments were conducted. The results show that the effectively propped fractures in the roof can provide flow channels for CBM. The better microseismic monitoring fractures and higher CBM production than direct fracturing in coal seams demonstrated the desirable feasibility of this technology. For the sandstone roof, the morphologies of hydraulic fractures were regular and one main fracture was formed by each perforation cluster. For the mudstone roof, the shapes of fractures were irregular and complicated fracture networks were formed. The findings can improve the design of horizontal well multistage fracturing in the roof of broken soft coal seams.

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