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Online since: July 2013
Authors: Yi Na Cai, Hong Bin Wang, Da Wang, Pu Yong Feng, Xue Fei Peng, Guang Zhi Han
PH
suspend solid mg/L
Median diameter μm
total mineralization mg/L
SRB
cell/mL
TGB
cell/mL
FB
cell/mL
mixed injection
6.7
10.482
8.70
8520
130
70
110
D11
6.7
70.744
18.31
7303
600
110
130
Well water
7
6.290
3.20
9505
25
12
36
Table 1 experimental data shows that the suspend solid of well water is basically reach the standards, but mixed water and D11 water are seriously non-compliance.
When the volume of mixed injection is 500ml (38PV), permeability reduction 60.7%; injection volume reached 2500ml (180PV), permeability decrease by 98.4%.
When D11 injection volume is 500ml (38PV), permeability reduction 68.9%; injection volume reached 2500ml (180PV), permeability decreased by 98.6%.
When the injection volume of well water is 500ml (38PV), permeability reduction 21.3%; injection volume reached 2500ml (180PV), permeability decreased only 62.2%.
Conclusions and suggestions Based on the analysis of the above experimental data, the mainly reasons of Suizhong 36-1 oilfield injection well plugging is the intrusion of suspended substances.
When the volume of mixed injection is 500ml (38PV), permeability reduction 60.7%; injection volume reached 2500ml (180PV), permeability decrease by 98.4%.
When D11 injection volume is 500ml (38PV), permeability reduction 68.9%; injection volume reached 2500ml (180PV), permeability decreased by 98.6%.
When the injection volume of well water is 500ml (38PV), permeability reduction 21.3%; injection volume reached 2500ml (180PV), permeability decreased only 62.2%.
Conclusions and suggestions Based on the analysis of the above experimental data, the mainly reasons of Suizhong 36-1 oilfield injection well plugging is the intrusion of suspended substances.
Online since: March 2008
Authors: Yi Ding, Yao Feng Zhang, Bo Qin Gu
The specimens treated by plasma spray have longer fracture time
and larger area reduction.
Table. 1 Electrochemical data of 08Cr2AlMo steel with different coatings Cr2O3-TiO2- SiO2 Al2O3-TiO2 Al2O3 Without coating Corrosion potential φc [V] -0.554 -0.595 -0.647 -0.774 Current density ic [A/cm 2 ] 9.024×10-7 6.003×10-6 8.573×106 4.561×10-5 SSRT test.
The SSRT data of 08Cr2AlMo steel specimens with and without plasma sprayed coatings in saturated H2S solution are listed in Table 2, where the test data obtained in air are also included.
Table. 2 SSRT data of 08Cr2AlMo steel with different coatings Coating material Reduction rate ψ [%] Elongation rate δ [%] Failure time tr [h] Cr2O3-TiO2- SiO2, in H2S solution 34.7 16.3 26.5 Al2O3-TiO2, in H2S solution 28.6 13.8 22.7 Al2O3, in H2S solution 21.5 11.9 20.7 Without coating, in H2S solution 14.8 10.5 14.7 Without coating, in air 42.0 22.4 33.1 Fig.2 shows the SEM fractographs of the tensile specimens of 08Cr2AlMo steel with the plasma sprayed coatings in saturated H2S solution.
Table. 1 Electrochemical data of 08Cr2AlMo steel with different coatings Cr2O3-TiO2- SiO2 Al2O3-TiO2 Al2O3 Without coating Corrosion potential φc [V] -0.554 -0.595 -0.647 -0.774 Current density ic [A/cm 2 ] 9.024×10-7 6.003×10-6 8.573×106 4.561×10-5 SSRT test.
The SSRT data of 08Cr2AlMo steel specimens with and without plasma sprayed coatings in saturated H2S solution are listed in Table 2, where the test data obtained in air are also included.
Table. 2 SSRT data of 08Cr2AlMo steel with different coatings Coating material Reduction rate ψ [%] Elongation rate δ [%] Failure time tr [h] Cr2O3-TiO2- SiO2, in H2S solution 34.7 16.3 26.5 Al2O3-TiO2, in H2S solution 28.6 13.8 22.7 Al2O3, in H2S solution 21.5 11.9 20.7 Without coating, in H2S solution 14.8 10.5 14.7 Without coating, in air 42.0 22.4 33.1 Fig.2 shows the SEM fractographs of the tensile specimens of 08Cr2AlMo steel with the plasma sprayed coatings in saturated H2S solution.
Online since: May 2014
Authors: Gabor Timar, Dimitrios Tsivoulas, Joao Quinta da Fonseca, Martin Tuffs, Michael Preuss
Texture predictions from a crystal plasticity finite-element model were also employed to support the experimental data and interpret the deformation mechanisms.
The thickness reduction for all samples presented here was 72-74%.
Some more useful data can be obtained from the Vickers hardness tests, regarding the anisotropy of the microstructure through the wall thickness.
All samples were deformed to thickness reductions of 72-74%.
In addition, a weaker fibre appears at Φ=30° on the mid-thickness plane or at low thickness reductions.
The thickness reduction for all samples presented here was 72-74%.
Some more useful data can be obtained from the Vickers hardness tests, regarding the anisotropy of the microstructure through the wall thickness.
All samples were deformed to thickness reductions of 72-74%.
In addition, a weaker fibre appears at Φ=30° on the mid-thickness plane or at low thickness reductions.
Online since: September 2016
Authors: Aniello Riccio, Andrea Sellitto, S. Saputo
Indeed, intra-laminar damage and inter-laminar damage often take place concurrently, causing a significant strength reduction up to composite structure collapse.
This failure mode is the most dangerous because can easily evolve, causing a substantial strength reduction of whole structure up to the collapse.
Figure 2: Impact results charts The correlations between the experimental data and the proposed numerical approach is excellent.
Figure 3: Intra-laminar damage- comparison between numerical results (a) and experimental data (Thermography (b); Ultrasonic C-SCAN (c) and Ultrasonic A-scan(d)) In Figure 3, a comparison among NDT techniques output (Thermography, Ultrasonic C-SCAN and Ultrasonic A-scan) and the numerical results, in terms of impact induced delaminations enveloped area is presented.
Indeed, numerical results in terms of force-time and force-displacement delamination have been compared to experimental data and numerically predicted delamination size has been compared with Non Destructive Technique results showing a very good agreement.
This failure mode is the most dangerous because can easily evolve, causing a substantial strength reduction of whole structure up to the collapse.
Figure 2: Impact results charts The correlations between the experimental data and the proposed numerical approach is excellent.
Figure 3: Intra-laminar damage- comparison between numerical results (a) and experimental data (Thermography (b); Ultrasonic C-SCAN (c) and Ultrasonic A-scan(d)) In Figure 3, a comparison among NDT techniques output (Thermography, Ultrasonic C-SCAN and Ultrasonic A-scan) and the numerical results, in terms of impact induced delaminations enveloped area is presented.
Indeed, numerical results in terms of force-time and force-displacement delamination have been compared to experimental data and numerically predicted delamination size has been compared with Non Destructive Technique results showing a very good agreement.
Online since: September 2017
Authors: Vladimir Toporov, O. Panasenko, Danis Sh. Nukhov, K. Pyankov, Aleksandr Bogatov
The analysis of the data obtained from simulation and their processability allow one to estimate the effect of process parameters and tool design features on the quality of shells, including the precision of geometric dimensions, and to develop guidelines on increasing the efficiency of pipe production.
Gleiberg, , (2) where ri, Dri and x are billet radius, radial reduction in the i-th section and ovalization factor.
The measurement data on the width and length of the contact surface is presented in fig. 2 (curve 4).
The calculation data on Ø328×23.7 shell dimensions are presented in table 2.
The obtained results agree well with the data obtained from the industrial experiment.
Gleiberg, , (2) where ri, Dri and x are billet radius, radial reduction in the i-th section and ovalization factor.
The measurement data on the width and length of the contact surface is presented in fig. 2 (curve 4).
The calculation data on Ø328×23.7 shell dimensions are presented in table 2.
The obtained results agree well with the data obtained from the industrial experiment.
Online since: November 2014
Authors: Chin Kim Gan, Wadhah Esmaeel Ibraheem
Load flow estimation can analyze power losses reduction in the system and bus voltages.
PV power generation can be calculated by the historical data of weather.
The electrical characteristics data of solkar 36 W Parameter Value Rated Power 37.08 W Voltage at Maximum power (Vmp) 16.56 V Current at Maximum power (Imp) 2.25 A Open circuit voltage (Voc) 21.24 V Short circuit current (Iscr) 2.55 A Total number of cells in series,parallel (Ns,Np) 36 Fig. 3.
For illustration purposes, one minute resolution for hourly outdoor global irradiance of UK weather with power generation data can be simulated to show the effect on the generation power by irradiation fluctuation over the daily time [7,8].
Fig. 1 represents an IEEE 4 bus test feeder with specified data of transformer, feeders and loads which are defined by IEEE Power and Energy Society standards [10].
PV power generation can be calculated by the historical data of weather.
The electrical characteristics data of solkar 36 W Parameter Value Rated Power 37.08 W Voltage at Maximum power (Vmp) 16.56 V Current at Maximum power (Imp) 2.25 A Open circuit voltage (Voc) 21.24 V Short circuit current (Iscr) 2.55 A Total number of cells in series,parallel (Ns,Np) 36 Fig. 3.
For illustration purposes, one minute resolution for hourly outdoor global irradiance of UK weather with power generation data can be simulated to show the effect on the generation power by irradiation fluctuation over the daily time [7,8].
Fig. 1 represents an IEEE 4 bus test feeder with specified data of transformer, feeders and loads which are defined by IEEE Power and Energy Society standards [10].
Online since: May 2005
Authors: Lea Di Cioccio, Peter J. Wellmann, Michel Pons, Jean Marc Dedulle, Elisabeth Blanquet, Roland Madar, Didier Chaussende, Francis Baillet, Pierre Ferret, Örjan Danielsson, M. Ucar
The main limitation in SiC growth
modeling is the accurate knowledge of physical, thermal, radiative, chemical and electrical data for
the different components of the reactor.
In addition, the link between the thermochemical history of the grown material and its structure and defects still needs further development and input of experimental data.
The main limitation in SiC growth modeling is the accurate knowledge of physical, thermal, radiative, chemical and electrical data for the different components of the reactor.
In addition, the link between the thermochemical history of the grown material and its structure and defects still needs further development and input of experimental data.
The optimization of the temperature field, e.g; reduction of the radial temperature difference, allows the reduction of the global stress field (Fig. 3).
In addition, the link between the thermochemical history of the grown material and its structure and defects still needs further development and input of experimental data.
The main limitation in SiC growth modeling is the accurate knowledge of physical, thermal, radiative, chemical and electrical data for the different components of the reactor.
In addition, the link between the thermochemical history of the grown material and its structure and defects still needs further development and input of experimental data.
The optimization of the temperature field, e.g; reduction of the radial temperature difference, allows the reduction of the global stress field (Fig. 3).
Online since: May 2004
Authors: M. Manuela M. Raposo, António Maurício C. Fonseca, Gilbert Kirsch
In agreement with the UV-VIS data and also
with the electrochemical study the new donor-acceptor systems synthesized could have applications
in NLO.
Table 1- Yields and UV-VIS spectra data of compounds 1-2.
In contrast, the reduction of the series occurs in an irreversible one-electron reduction.
The data illustrate that there is quite an obvious electrochemical distinction between the compounds depending on the type of �-bridge, bridge length and the type of acceptor groups, (Table 2).
Table 2- Electrochemical data for oligothiophenes 1-2.
Table 1- Yields and UV-VIS spectra data of compounds 1-2.
In contrast, the reduction of the series occurs in an irreversible one-electron reduction.
The data illustrate that there is quite an obvious electrochemical distinction between the compounds depending on the type of �-bridge, bridge length and the type of acceptor groups, (Table 2).
Table 2- Electrochemical data for oligothiophenes 1-2.
Online since: September 2007
Authors: Volker Cimalla, Christian Förster, Joerg Pezoldt, Oliver Ambacher, Pierre M. Masri, Thomas Stauden, Francisco M. Morales, Charbel Zgheib
For the reduction
of the residual strain an alternative route for the improvement of the epitaxial growth of 3CSiC(100)
on Si(100) was developed.
The TO phonon peak positions obtained by Raman measurements were used to calculate into strain values using the data reported in [8].
The voids at the interface lead to a relaxation in the grown layer promoting a reduction of the residual strain in the 3C-SiC layer.
The strain reduction reaches a minimum at Ge precoverages between 0.5 and 1 ML.
In dependence on the data used the ratio varies between 0.8025 and 0.8027.
The TO phonon peak positions obtained by Raman measurements were used to calculate into strain values using the data reported in [8].
The voids at the interface lead to a relaxation in the grown layer promoting a reduction of the residual strain in the 3C-SiC layer.
The strain reduction reaches a minimum at Ge precoverages between 0.5 and 1 ML.
In dependence on the data used the ratio varies between 0.8025 and 0.8027.
Online since: December 2013
Authors: Mohd Nizam A. Rahman, Mohd Azhar Sahwan, Baba M. Deros
The focus of the approach is on cost reduction by eliminating non-value added activities.
Ideally, organizations have come to realization that when costs of reduction are reduced through reduction of wastes, profits improves since there is an improvement of quality and market share.
A case study protocol was constructed to assist the data collection.
Yes (3 years) Yes (13 years) Yes (21 years) Yes (22 years) Statistical process control Yes (3 years) Yes (15 years) Yes (21 years) Yes (21 years) Total preventive maintenance Yes (10 years) Yes (15 years) No Yes (3 years) Visual stream mapping Yes (3 years) Yes (13 years) Yes (7 years) No Develop customer satisfaction measures No Yes (13 years) No No Develop a six sigma programme No, company using sumitomo way No No No Supplier development No Yes (5 years) No No Quality assurance system No No No No Develop a systematic training and education Yes (3 years) Yes (13 years) Yes (13 years) No Develop a data collection and measurement system No No No No From the Tables 3, it can be observed that both companies A and D are quite advanced in their application of kaizen compared to the other two.
There are no companies applied the lean initiative of six sigma programme, quality assurance system and data collection and measurement system.
Ideally, organizations have come to realization that when costs of reduction are reduced through reduction of wastes, profits improves since there is an improvement of quality and market share.
A case study protocol was constructed to assist the data collection.
Yes (3 years) Yes (13 years) Yes (21 years) Yes (22 years) Statistical process control Yes (3 years) Yes (15 years) Yes (21 years) Yes (21 years) Total preventive maintenance Yes (10 years) Yes (15 years) No Yes (3 years) Visual stream mapping Yes (3 years) Yes (13 years) Yes (7 years) No Develop customer satisfaction measures No Yes (13 years) No No Develop a six sigma programme No, company using sumitomo way No No No Supplier development No Yes (5 years) No No Quality assurance system No No No No Develop a systematic training and education Yes (3 years) Yes (13 years) Yes (13 years) No Develop a data collection and measurement system No No No No From the Tables 3, it can be observed that both companies A and D are quite advanced in their application of kaizen compared to the other two.
There are no companies applied the lean initiative of six sigma programme, quality assurance system and data collection and measurement system.