Hot water flood

Injection apparatus for injecting hot water into an oil well head, the injection apparatus comprising:

• a substantially cylindrical combustion chamber having an upper end and a lower end;
• a fuel pump connected to the upper end of the combustion chamber, the fuel pump injecting combustible fuel into the combustion chamber at a predetermined fuel injection rate;
• an air pump connected to the upper end of the combustion chamber, the air pump injecting air into the combustion chamber at a predetermined air injection rate;
• a spark generator connected to the combustion chamber near the upper end thereof, the spark generator providing sparks for initiating combustion of the combustible fuel injected by the fuel pump into the combustion chamber;
• an injection conduit connected between the lower end of the combustion chamber and the well head, the injection conduit providing communication between the combustion chamber and the well head, whereby the combustion gases are injected through the injection conduit into the well head;
• and
• a water pump connected to the injection conduit between the combustion chamber and the well head, the water pump injecting water into the injection conduit at a predetermined water injection rate, whereby the injected water is heated by the combustion gases and injected therewith into the well head via the injection conduit.