1. An oil recovery system, comprising:
a solar power tower for receiving a first portion of water from a water treatment device, heating the first portion of water using solar radiation, and generating a first steam;
a boiler for receiving a second portion of water from the water treatment device, heating the second portion of water, and generating a second steam; and
a flow control device coupled to the solar power tower and the boiler, wherein the flow control device receives at least one of the first steam and the second steam and injects at least one of the first steam and the second steam to an oil field having an oil well.
2. The oil recovery system of claim 1, further comprising a first separator coupled to the oil well, wherein the first separator receives the mixture of oil and water from the oil well, separates a first quantity of oil from the mixture of oil and water, and generates a separated mixture of oil and water.
3. The oil recovery system of claim 2, further comprising a second separator coupled to the first separator, wherein the second separator receives the separated mixture of oil and water from the first separator, separates a second quantity of oil from the separated mixture of oil and water, and generates a separated water, wherein the separated mixture of oil and water has less oil as compared to the mixture of oil and water.
4. The oil recovery system of claim 3, further comprising the water treatment device having a first water treatment device and a second water treatment device.
5. The oil recovery system of claim 4, wherein the second water treatment device comprises a thermal evaporator device or a membrane water treatment device.
6. The oil recovery system of claim 4, wherein the first water treatment device is coupled to the second separator, wherein the first water treatment device receives the separated water from the second separator and further treats the separated water so as to generate a first treated water.
7. The oil recovery system of claim 6, wherein the first treated water comprises the first portion of water and the second portion of water.
8. The oil recovery system of claim 6, wherein the second water treatment device is coupled to the first water treatment device; wherein the second water treatment device receives the first treated water from the first water treatment device and purifies the first treated water so as to generate a second treated water, wherein the second treated water comprises the first portion of water and the second portion of water.
9. The oil recovery system of claim 8, further comprising a heat exchanger coupled to the first separator, the second separator, and the second water treatment device, wherein the heat exchanger receives the separated mixture of oil and water from the first separator and the second treated water from the second water treatment device and circulates the separated mixture of oil and water in heat exchanging relationship with the second treated water to heat the second treated water and cool the separated mixture of oil and water.
10. The oil recovery system of claim 9, wherein the heat exchanger is coupled to the boiler and the solar power tower via the feed pump; wherein the boiler comprises a drum boiler.
11. The oil recovery system of claim 6, further comprising a heat exchanger coupled to the first separator, the second separator, and the first water treatment device, wherein the heat exchanger receives the separated mixture of oil and water from the first separator and the first treated water from the first water treatment device and circulates the separated mixture of oil and water in heat exchanging relationship with the first treated water to heat the first treated water and cool the separated mixture of oil and water.
12. The oil recovery system of claim 11, wherein the heat exchanger is coupled to the boiler and the second water treatment device via the feed pump;
wherein the boiler comprises a once through boiler.
13. A method for enhanced oil recovery, comprising:
receiving a first portion of water from a water treatment device into a solar power tower;
heating the first portion of water in the solar power tower using solar radiation to generate a first steam;
receiving a second portion of water from the water treatment device into a boiler;
heating the second portion of water in the boiler to generate a second steam; and
feeding the first steam and the second steam to an oil well of an oil field via a flow control device to extract a mixture of oil and water.
14. The method of claim 13, further comprising feeding the mixture of oil and water from the oil well into a first separator and separating a first quantity of oil from the mixture of oil and water via the first separator to generate a separated mixture of oil and water.
15. The method of claim 14, further comprising feeding the separated mixture of oil and water from the first separator into a second separator and separating a second quantity of oil from the separated mixture of oil and water via the second separator to generate a separated water.
16. The method of claim 15, further comprising feeding the separated water from the second separator into a first water treatment device and treating the separated water via the first water treatment device so as to generate a first treated water.
17. The method of claim 16, wherein the first treated water comprises the first portion of water and the second portion of water.
18. The method of claim 17, further comprising feeding the first portion of water into a second water treatment device and purifying the first portion of water via the second water treatment device so as to generate a second treated water before feeding the second treated water into the solar power tower.
19. The method of claim 16, further comprising feeding the first treated water from the first water treatment device into a second water treatment device and purifying the first treated water via the second water treatment device so as to generate a second treated water, wherein the second treated water comprises the first portion of water and the second portion of water.
20. The method of claim 19, further comprising feeding the separated mixture of oil and water from the first separator and the second treated water from the second water treatment device into a heat exchanger and circulating the separated mixture of oil and water in a heat exchanging relationship with the second treated water to heat the second treated water and cool the separated mixture of oil and water.
21. The method of claim 16, further comprising feeding the separated mixture of oil and water from the first separator and the first treated water from the first water treatment device into a heat exchanger and circulating the separated mixture of oil and water in a heat exchanging relationship with the first treated water to heat the first treated water and cool the separated mixture of oil and water.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A multi-phase steel sheet excellent in hole expandability characterized in that:
the steel sheet contains, as chemical components in mass,
C: 0.03 to 0.15%,
P: not more than 0.010%,
S: not more than 0.003%, and
either one or both of Si and Al in a total amount of 0.5 to 4%, and one or more of Mn, Ni, Cr, Mo and Cu in a total amount of 0.5 to 4%, with the balance consisting of Fe and unavoidable impurities;
the microstructure at a section of the steel sheet is composed of either one or both of retained austenite and martensite which account(s) for 3 to 30% in total in area percentage and the balance consisting of either one or both of ferrite and bainite;
the maximum length of the crystal grains in the microstructure is not more than 10 microns; and
the number of inclusions 20 microns or larger in size at a section of the steel sheet is not more than 0.3 piece per square millimeter.
2. A multi-phase steel sheet excellent in hole expandability characterized in that:
the steel sheet contains, as chemical components in mass,
C: 0.03 to 0.15%,
P: not more than 0.010%,
S: not more than 0.003%, and
either one or both of Si and Al in a total amount of 0.5 to 4%, and one or more of Mn, Ni, Cr, Mo and Cu in a total amount of 0.5 to 4%, with the balance consisting of Fe and unavoidable impurities;
the microstructure at a section of the steel sheet is composed of either one or both of retained austenite and martensite which account(s) for 3 to 30% in total in area percentage, pearlite which accounts for more than 0% to not more than 3% in area percentage, and the balance consisting of either one or both of ferrite and bainite;
the maximum length of the crystal grains in the microstructure is not more than 10 microns; and
the number of inclusions 20 microns or larger in size at a section of the steel sheet is not more than 0.3 piece per square millimeter.
3. A multi-phase steel sheet excellent in hole expandability according to claim 1, characterized in that the micro Vickers hardness of bainite is less than 240.
4. A multi-phase steel sheet excellent in hole expandability according to claim 1, characterized by further containing, as chemical components in mass, one or more of Nb, V and Ti in a total amount of 0.3% or less.
5. A multi-phase steel sheet excellent in hole expandability according to claim 1, characterized by further containing, as a chemical component in mass, B of 0.01% or less.
6. A multi-phase steel sheet excellent in hole expandability according to claim 1, characterized by further containing, as chemical components in mass, either one or both of Ca of 0.01% or less and REM of 0.05% or less.
7. A method of producing a multi-phase steel sheet excellent in hole expandability, which steel sheet contains, as chemical components in mass,
C: 0.03 to 0.15%,
P: not more than 0.010%,
S: not more than 0.003%, and
either one or both of Si and Al in a total amount of 0.5 to 4%, and one or more of Mn, Ni, Cr, Mo and Cu in a total amount of 0.5 to 4%, with the balance consisting of Fe and unavoidable impurities, characterized by:
when molten steel with said components is refined, circulating the molten steel not less than 1.5 times after flux for desulfurization is added at the time of the desulfurization of the molten steel;
further, when a steel sheet is produced by hot-rolling a slab obtained by casting said molten steel, conducting the finish rolling by controlling the finish-rolling entry temperature to 950\xb0 C. or higher and the finish-rolling exit temperature within the range from 780 to 920\xb0 C.; and
coiling the steel sheet thus obtained at a temperature of 500\xb0 C. or lower.
8. A method of producing a multi-phase steel sheet excellent in hole expandability according to claim 7, characterized in that the steel sheet further contains, as chemical components in mass, one or more of Nb, V and Ti in a total amount of 0.3% or less.
9. A method of producing a multi-phase steel sheet excellent in hole expandability according to claim 7, characterized in that the steel sheet further contains, as a chemical component in mass, B of 0.01% or less.
10. A method of producing a multi-phase steel sheet excellent in hole expandability according to claim 7, characterized in that the steel sheet further contains, as chemical components in mass, either one or both of Ca of 0.01% or less and REM of 0.05% or less.