A deep well electric heating igniter and its application method

Abstract

The invention relates to an oilfield electric heating igniter, which belongs to the technical field of oilfield electric heating. The two ends of the U-shaped electric heating tube of the igniter extend into the junction box from the bottom of the junction box. The detection ends of the two temperature sensors are respectively adjacent to the lower end of the U-shaped electric heating tube and the lower end of the cable; the upper part of the junction box is fixedly connected with the sealing sleeve fixed at the lower end of the cable, and the center of the solid core of the cable is a reinforcing core, and the outer edge of the reinforcing core is It is three power cores evenly distributed along the circumference, and there are two signal cores between two adjacent power cores. The two terminals of the electric heating tube are electrically connected with the corresponding joints of the crude oil sensor and the two temperature sensors. The invention has the advantages of not generating additional pollution, saving energy, and avoiding waste of crude oil.

Description

technical field [0001] The invention relates to an igniter, in particular to an electric heating igniter for deep wells, and belongs to the technical field of electric heating for oil fields. Background technique [0002] According to the applicant's knowledge, the underground crude oil in some oil fields is thick and difficult to extract. The Chinese patent application with the application number CN200610134965.5 proposes a thermal ignition method for the fire-flooding oil recovery oil layer. Mixed gas such as nitrogen, carbon dioxide and water vapor and a large amount of heat energy, when the combustion temperature in the gas-steam generator reaches 1800°C, mix with water to cool down to 300-400°C, the pressure is less than 25MPa, and the mixed gas passes through the wellhead device and injection The pipe string is injected into the oil layer; a mixed gas of 3-10×104Nm3300-400°C is injected to preheat the oil layer, and then air is continuously injected into the well to o...

AI Technical Summary

Problems solved by technology

Although this method solves the problem of low ignition success rate of the chemical method, because diesel is used as fuel, exhaust gas will be generated, causing environmental pollution; and the temperature of diesel is too high after combustion, which needs to be mixed with water to cool down, wasting energy; the combustion temperature is difficult to control , leading to the loss of crude oil layer

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