Electric heating type downhole steam generator

A steam generator, electrothermal technology, applied in the direction of steam generation, steam generation method, wellbore/well parts, etc., can solve the problems of limited steam generation, small heating tube, damaged electric heating wire, etc., to achieve heat absorption , long residence time, full heat absorption effect
CN106016221AActive Publication Date: 2016-10-12YANGTZE UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANGTZE UNIVERSITY
Publication Date
2016-10-12

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Abstract

The invention relates to the technical field of heavy oil thermal recovery in petroleum engineering, in particular to an electric heating type downhole steam generator. The generator comprises an inlet part, an electric heating part and an outlet part which are sequentially connected from top to bottom, wherein the electric heating part comprises at least one heating section; each heating section comprises a heating section casing and multiple heating tubes arranged inside the heating section casing; electric heating wires are arranged in all the heating tubes, and positions between the electric heating wires and the heating tubes are filled with insulating and temperature-resistant materials; space allowing water to flow through is formed among the heating tubes and between the heating tubes and the heating section casings; a water inlet is arranged at the inlet part; and a discharge port is arranged at the outlet part. High-temperature steam is produced downhole and directly injected into an oil layer, the heat loss is reduced, the energy utilization rate is greatly increased, and the generator has the outstanding advantages in deep well and extra-deep wells; and the electric heating wires are arranged in the heating tubes, so that the generator is convenient to mount, good in reliability and more beneficial to steam generation.
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Description

technical field

[0001] The invention relates to the technical field of heavy oil thermal recovery in petroleum engineering, in particular to an electrothermal downhole steam generator. Background technique

[0002] my country has abundant heavy oil resources, but the cost and difficulty of exploitation are relatively high. In thermal recovery of heavy oil, steam flooding is one of the most widely used and mature methods.

[0003] Steam generator is one of the indispensable equipments of steam flooding technology. At present, the most common method is to generate high-temperature and high-pressure steam on the ground, and inject it into the downhole heavy oil reservoir through insulated pipelines. The equipment on the well of this technology is bulky and requires a high investment in supporting facilities. The exhaust gas takes away a lot of heat energy and pollutes the surrounding air; and after the surface steam passes through a long pipeline, the energy loss is large, and...

Claims

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