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A water recovery process for a steam assisted gravity drainage system for a heavy oil recovery facility, the process comprising a flash drum and a flash drum heat exchanger/condenser, wherein the water recovery process receives hot water produced by a facility at a temperature above the water atmosp

A water recovery process for a steam assisted gravity drainage system for a heavy oil recovery facility, the process comprising a flash drum and a flash drum heat exchanger/condenser, wherein the water recovery process receives hot water produced by a facility at a temperature above the water atmospheric boiling point and cools it to a temperature below the water atmospheric boiling point before transferring it to the remaining section of the water recovery process.

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1. A water recovery process for SAGD (Steam Assisted Gravity Drainage) system for a heavy oil recovery facility, the process comprising: providing a flash drum and a flash drum heat exchanger/condenser;separating oil from water;receiving in the flash drum hot water produced after the step of separat

1. A water recovery process for SAGD (Steam Assisted Gravity Drainage) system for a heavy oil recovery facility, the process comprising: providing a flash drum and a flash drum heat exchanger/condenser;separating oil from water;receiving in the flash drum hot water produced after the step of separating oil from water, the hot water being at a temperature above the water atmospheric boiling point;cooling the hot water in the flash drum and the flash drum heat exchanger to a temperature below the water atmospheric boiling point; andtransferring the cooled water to a remaining section of the water recovery process. 2. The water recovery process of claim 1, wherein the hot water produced contains impurities, such as traces of oil, the water recovery process further comprising providing a final water treating unit; and removing at least some of said impurities from the water with the final water treating unit. 3. The water recovery process of claim 2 wherein the final water treating unit comprises at least one of an induced gas flotation unit and oil removal filters. 4. A water recovery process comprising: providing a flash drum, a flash drum heat exchanger/condenser and a final water treating unit;introducing a hot water produced after a separation of oil from water into the flash drum;separating the hot water produced into a cooled liquid and a vapour;cooling the vapour in the flash drum heat exchanger/condenser;mixing the condensed liquids from the heat exchanger with the cooled liquid, from the flash drum heat exchanger/condenser forming a mixture;transferring this mixture into the final water treating unit,removing impurities from the water;producing a cleaned water;transferring the cleaned water to a remainder of the water recovery process or to atmospheric tanks for storage. 5. The water recovery process of claim 1 or 4 wherein the flash drum operates below the atmospheric pressure to prevent flashing in the down stream equipment. 6. The water recovery process of claim 1 or 4 wherein the operating pressure of the flash drum is between (+10) kPag to (−10) kPag. 7. The water recovery process of claim 1 or 4 wherein the flash drum heat exchanger/condenser receives the water vapour from the flash drum and chills that vapour, to produce a chilled vapour and liquid stream to a temperature below the water atmospheric boiling point in a range of (40)° C. to (100)° C. 8. The water recovery process of claim 1 or 4 wherein the flash drum heat exchanger/condenser receives the water vapour from the flash drum and the final water treating unit, and chills that vapour, to produce a chilled vapour and liquid stream to a temperature below the water atmospheric boiling point in a range of (40)° C. to (100)° C. 9. The water recovery process of claim 1 or 4 wherein the hot water temperature is between (100)° C. and (180)° C. with a pressure between (0) kPag and (1400) kPag. 10. The water recovery process of claim 1 or 4 wherein the water exiting the flash drum is at its bubble point temperature at a pressure between (−17) kPag and (0) kPag, and the vapour is at its bubble point temperature at a pressure between (−17) kPag and (0) kPag. 11. The water recovery process of claim 1 or 4 wherein the water exiting the flash drum heat exchanger/condenser is at a temperature between (40)° C. and (100)° C. 12. The water recovery process of claim 4 wherein the combined water entering the final water treating unit is at a temperature between (90)° C. and (100)° C. 13. The water recovery process of claim 4 wherein the water exiting the final water treatment unit is at a temperature of between (90)° C. and (100)° C. 14. The water recovery process of claim 4 wherein the flash drum heat exchanger/condenser and the flash drum are physically located above the final water treating unit to provide a pump suction head. 15. The water recovery process of claim 4 wherein the final water treating unit includes a gas floatation unit, and wherein a pump suction head is between (2) m and (6) m water for the gas floatation unit. 16. The water recovery process of claim 1 or 4 wherein the flash drum heat exchanger/condenser is cooled by glycol. 17. The water recovery process of claim 1 or 4 wherein cold make-up water is directed to the flash drum and further including preheating the water and reducing the amount of coolant in the flash drum heat exchanger/condenser. 18. The water recovery process of claim 1 or 4, wherein the process is conducted with a system that is transportable and modular and is suitable for crude oil recovery from oil sands.