Water injection type high-pressure combustion method

Abstract

The invention relates to a water injection type high-pressure combustion method. The method comprises the following steps of: arranging a water injection hole (4) at one end of a combustion section (7) close to a head part (1); injecting a certain quantity of water to a combustion chamber (10) from the water injection hole (4); enabling fuel oil to enter the combustion chamber (10) from an oil nozzle (3) and compressed air to enter the combustion chamber (10) from an air distributor (2); communicating a working end of an igniter (5) to the combustion chamber (10); igniting a mixture of the fuel oil and air by using an igniter (5); and injecting a certain quantity of water into the combustion chamber (10) from the water injection hole (4). The method has strong reliability and easy operation, and the service life of equipment is obviously prolonged.

Description

technical field [0001] The invention relates to a method for a high-pressure mixed gas generating device used in petroleum thermal exploitation, and belongs to the technical field of petroleum exploitation equipment. Background technique [0002] The oil extraction process can be roughly divided into primary oil recovery, secondary oil recovery and multiple oil recovery. Steam recovery is a typical multiple oil recovery process. Steam oil recovery uses the heating effect of thermal energy to reduce the viscosity of crude oil, and at the same time increase the pressure of the oil layer to a certain extent, thereby improving the oil recovery rate of the oil well. [0003] Since the early 1980s, the practice of using steam thermal recovery technology in my country's oilfields has shown that this technology is more suitable for the low production cycle range of oil layers in formations above 800m. During the production process, the formation pressure continues to drop. After 6...

AI Technical Summary

Problems solved by technology

However, these patented devices still have deficiencies in structural design, which brings many difficulties to practical applications.

Typically: the temperature in the combustion chamber is too high (about 2000°C), and under the condition of high oil well back pressure (as is usually the case in practice), ① the high temperature center of the flame in the combustion chamber gradually moves to the fire-facing surface of the head, and the head The parts are easily burned (such as the end face of the fire, the ignition head of the igniter, the atomizer of the oil nozzle, etc.); The use effect of the lining is significantly reduced, thus greatly shortening the service life of the burner (or gas injector) (sometimes less than one gas injection working day)

And so on, the reliability and economy of the operation of the gas injection device will be seriously affected

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