A geothermal composite mining pipe for geothermal wells

Abstract

The invention relates to a geothermal composite exploitation tube for a geothermal well. The geothermal composite exploitation tube comprises an extraction pipe, a bearing frame, guide sliding rails,a protective sleeve, an explosion valve, a flow guide pipe, a control valve, a pressure sensor and a wiring terminal, wherein the protective sleeve wraps the extraction pipe and coaxial with the extraction pipe; the guide sliding rails are uniformly distributed on the outer surface of the extraction pipe, and the guide sliding rails are of a closed loop-shaped structure which is coaxial with the extraction pipe; the inner surface of the protective sleeve is in sliding connection with the guide slide rails, at least one guide pipe is arranged on the inner surface of the protective sleeve and isparallel with the axis of the protective sleeve, the explosion valve is embedded in the side wall of the front end of the protective sleeve and is connected with the front end of the flow guide pipe,and the tail end of the flow guide pipe is communicated with the control valve and the pressure sensor separately; the extraction pipe comprises a drainage pipe, an extraction head, a rotary table mechanism, a flow guide plate, an angle sensor and a flow sensor. The geothermal composite exploitation tube is simple in structure, flexible and convenient to use and high in structural strength, the equipment loss can be effectively reduced, and the resource recycling utilization rate can be increased.

Description

technical field [0001] The invention relates to a geothermal energy development and utilization equipment, in particular to a geothermal composite recovery pipe for a geothermal well. Background technique [0002] At present, in the development and utilization of geothermal energy, due to the constraints and limitations of the stratum structure, the resources such as hot water and steam gathered at the geothermal wells are often relatively small, and a large number of geothermal resources are blocked by the stratum and cannot be effectively exploited. The current main solution to this problem is to perform high-pressure fracturing operations on the formation on the wellbore wall of the geothermal well through high-pressure gas, liquid, etc., to increase the number, depth and width of fractures between the formations, and to facilitate the geothermal resources in the formation. In order to achieve the purpose of improving the utilization rate of geothermal resource exploitati...

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Problems solved by technology

[0002] At present, in the development and utilization of geothermal energy, due to the constraints and limitations of the stratum structure, the resources such as hot water and steam gathered at the geothermal wells are often relatively small, and a large number of geothermal resources are blocked by the stratum and cannot be effectively exploited. The current main solution to this problem is to perform high-pressure fracturing operations on the formation on the wellbore wall of the geothermal well through high-pressure gas, liquid, etc., to increase the number, depth and width of fractures between the formations, and to facilitate the geothermal resources in the formation. In order to achieve the purpose of improving the utilization rate of geothermal resource exploitation, but in actual work, it is found that the currently used magnetosphere fracturing equipment and geothermal resource extraction equipment often operate independently of each other, which leads to geothermal extraction work and geothermal resource extraction equipment. There are large contradictions among formation fracturing operations, which seriously affect the continuity and reliability of geothermal resource extraction. At the same time, in the current fracturing construction, the current fracturing equipment is often disposable equipment, and the resource reuse rate is relatively low. The cost of fracturing operations is relatively low, and it is difficult to implement repeated and cyclic implementations. Therefore, in view of this situation, it is urgent to develop a new type of geothermal resource equipment to meet the needs of simultaneous implementation of drainage and fracturing construction.

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