Geothermal development well reinforcing device

Abstract

The utility model relates to the technical field of reinforcing devices, and discloses a geothermal development well reinforcing device which comprises a geothermal well, a reinforcing frame and an inner protection pipe, the inner protection pipe is located in the geothermal well, the reinforcing frame is located between the geothermal well and the inner protection pipe, and the reinforcing frame comprises a plurality of built-in rings, a plurality of external rings and a plurality of connecting frames. The inner wall of the built-in ring is welded to the outer portion of the inner protection pipe, the outer wall of the external ring is connected to the inner wall of the geothermal well in an attached mode, the external ring is located on the outer side of the built-in ring, the built-in ring and the external ring are fixedly connected through the connecting frame, and mixed filler is arranged between the geothermal well and the inner protection pipe. The reinforcing frame and the inner protection pipe are installed in the geothermal well, the reinforcing frame is located between the inner protection pipe and the inner wall of the geothermal well, and after installation is completed, a worker pours mixed filler into the reinforcing frame, and the inner protection pipe and the reinforcing frame are fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforcement devices, in particular to a reinforcement device for geothermal development wells. Background Art

[0002] A geothermal well refers to a method and device for generating electricity using geothermal energy at a well depth of about 3,500 meters or hot spring water with a water temperature greater than 30°C. Geothermal energy is divided into three categories: high temperature, medium temperature, and low temperature. Geothermal energy above 150°C, existing in the form of steam, belongs to high-temperature geothermal energy; geothermal energy between 90°C and 150°C, existing in the form of a mixture of water and steam, belongs to medium-temperature geothermal energy; geothermal energy above 25°C and below 90°C, existing in the form of warm water, warm-hot water, hot water, etc., belongs to low-temperature geothermal energy.

[0003] An existing reinforcement device for geothermal development wells (publication number: CN220487584U) has at least the following drawbacks: when the reinforcement device is installed inside the geothermal well, both its reinforcement device and fixing device are located at the center of the well. When the steam surges inside the geothermal well, it will heat the reinforcement device and the fixing device at high temperature. Over time, the reinforcement device and the fixing device at the deepest part of the geothermal well will be deformed due to high temperature, and the reinforcement device and the fixing device remain at high temperature for a long time, which is not conducive to the staff to disassemble the reinforcement device and the fixing device. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a reinforcement device for geothermal development wells is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A reinforcement device for geothermal development wells includes a geothermal well, a reinforcement frame, and an inner protection tube. The inner protection tube is located inside the geothermal well, the reinforcement frame is located between the geothermal well and the inner protection tube. The reinforcement frame includes a plurality of inner rings, outer rings, and connecting frames. The inner wall of the inner ring is welded to the outside of the inner protection tube, the outer wall of the outer ring is fitted and connected to the inner wall of the geothermal well, the outer ring is located outside the inner ring, and the inner ring and the outer ring are fixedly connected through the connecting frame. There is a mixed filler between the geothermal well and the inner protection tube.

[0007] As a further solution of the utility model, the mixed filler is filled in the inner void of the reinforcement frame, and a wellhead fixing frame is fixedly installed at the top of the geothermal well.

[0008] As a further solution of the utility model, a plugging groove is formed inside the wellhead fixing frame, the top of the inner protection tube is butted inside the plugging groove, and a plurality of plugging rods are fixedly installed at the bottom of the inner protection tube.

[0009] As a further solution of the present utility model, the inner protection tube and the wellhead retention frame are fixedly connected by retention bolts, and a wellhead tube is provided at the top of the inner protection tube.

[0010] As a further solution of the present utility model, the wellhead tube is fixedly connected to the top of the wellhead retention frame, and a plurality of retention screws are provided outside the wellhead tube, and the retention screws are located outside the insertion rod.

[0011] As a further solution of the present utility model, the retention screws penetrate through the wellhead retention frame and are threadedly connected to the middle of the mixed filler, and the retention screws are located between the inner ring and the outer ring.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] 1. The staff installs the reinforcement frame and the inner protection tube inside the geothermal well. The reinforcement frame is located between the inner protection tube and the inner wall of the geothermal well. After installation, the staff pours the mixed filler into the reinforcement frame to fix the inner protection tube and the reinforcement frame, and to prevent the space between the geothermal well and the inner protection tube from being too empty, which affects the erection of the inner protection tube. The middle of the inner protection tube 3 is hollow without obstacles, which is convenient for the steam and water inside the geothermal well to surge through the inner protection tube.

[0014] 2. The staff fixedly connects the retention frame and the inner protection tube, and then installs the retention frame at the wellhead of the geothermal well. The retention screws are used to penetrate through the wellhead retention frame, and mechanical equipment is used to drive the retention screws through the mixed filler and into the soil layer at the bottom of the geothermal well. The mixed filler accumulates in the thread grooves on the surface of the retention screws to lock and fix the retention screws, strengthening the installation of the inner protection tube and the reinforcement frame, and preventing the reinforcement frame and the inner protection tube from collapsing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of a geothermal development well reinforcement device proposed by the present utility model;

[0016] Figure 2 is a structural schematic diagram of the mixed filler of a geothermal development well reinforcement device proposed by the present utility model;

[0017] Figure 3 is a structural schematic diagram of the reinforcement frame of a geothermal development well reinforcement device proposed by the present utility model;

[0018] Figure 4 is a structural schematic diagram of the retention screw of a geothermal development well reinforcement device proposed by the present utility model;

[0019] In the figure: 1, geothermal well; 2, reinforcement frame; 201, inner ring; 202, outer ring; 203, connecting frame; 3, inner protection pipe; 301, inserting rod; 4, mixed filler; 5, wellhead fixing frame; 501, inserting groove; 6, wellhead pipe; 7, fixing screw. Specific implementation manner

[0020] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation manners.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] Refer to Figures 1 - 4 , a reinforcement device for a geothermal development well, including a geothermal well 1, a reinforcement frame 2 and an inner protection pipe 3. The inner protection pipe 3 is located inside the geothermal well 1, and the reinforcement frame 2 is located between the geothermal well 1 and the inner protection pipe 3. The reinforcement frame 2 includes a number of inner rings 201, outer rings 202 and connecting frames 203. The inner wall of the inner ring 201 is welded to the outside of the inner protection pipe 3, the outer wall of the outer ring 202 is adhesively connected to the inner wall of the geothermal well 1, the outer ring 202 is located outside the inner ring 201, and both the inner ring 201 and the outer ring 202 are fixedly connected through the connecting frame 203. A mixed filler 4 is provided between the geothermal well 1 and the inner protection pipe 3.

[0024] During use, the staff installs the reinforcement frame 2 and the inner protection pipe 3 inside the geothermal well 1. The reinforcement frame 2 is located between the inner protection pipe 3 and the inner wall of the geothermal well 1. After installation, the staff pours the mixed filler 4 into the reinforcement frame 2 to fix the inner protection pipe 3 and the reinforcement frame 2. The built-in ring 201 of the reinforcement frame 2 is welded to the outside of the inner protection pipe 3. The built-in ring 201 and the external ring 202 are welded together through the connection frame 203, so that a number of built-in rings 201, external rings 202 and connection frames 203 are combined to form the reinforcement frame 2 to stabilize the position of the inner protection pipe 3.

[0025] In this embodiment, the mixed filler 4 is filled in the internal voids of the reinforcement frame 2, and a wellhead fixation frame 5 is fixedly installed at the top of the geothermal well 1.

[0026] During use, the mixed filler is composed of materials such as sand, soil and stones, and is filled in the voids between the built-in ring and the external ring to prevent the space between the geothermal well 1 and the inner protection pipe 3 from being too empty and affecting the erection of the inner protection pipe 3.

[0027] In this embodiment, a plug-in slot 501 is provided inside the wellhead fixation frame 5, the top of the inner protection pipe 3 is butted inside the plug-in slot 501, and a number of plug-in rods 301 are fixedly installed at the bottom of the inner protection pipe 3.

[0028] During use, the bottom of the inner protection pipe 3 is inserted into the soil layer at the bottom of the geothermal well 1 through the plug-in rods 301 to fix the position of the inner protection pipe 3.

[0029] In this embodiment, the inner protection pipe 3 and the wellhead fixation frame 5 are fixedly connected by fixation bolts, and a wellhead pipe 6 is provided at the top of the inner protection pipe 3.

[0030] During use, the wellhead fixation frame 5, the inner protection pipe 3 and the wellhead pipe 6 are all hollow and unobstructed, facilitating the steam and water inside the geothermal well 1 to surge through the inner protection pipe 3.

[0031] In this embodiment, the wellhead pipe 6 is fixedly connected to the top of the wellhead fixation frame 5, and a number of fixation screw rods 7 are provided outside the wellhead pipe 6. The fixation screw rods 7 are located outside the plug-in rods 301.

[0032] During use, the fixation frame is installed at the wellhead of the geothermal well 1, the fixation screw rods 7 are used to penetrate the wellhead fixation frame 5, and mechanical equipment is used to penetrate the fixation screw rods 7 through the mixed filler 4 and drive them into the soil layer at the bottom of the geothermal well 1.

[0033] In this embodiment, the fixation screw rods 7 penetrate the wellhead fixation frame 5 and are threadedly connected to the middle of the mixed filler 4. The fixation screw rods 7 are located between the built-in ring 201 and the external ring 202.

[0034] During use, the mixed filler 4 accumulates in the thread grooves on the surface of the retaining screw 7 to lock and fix the retaining screw 7, strengthening the installation of the inner protection tube 3 and the reinforcement frame 2 and preventing the reinforcement frame 2 and the inner protection tube 3 from collapsing.

[0035] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: The staff installs the reinforcement frame 2 and the inner protection tube 3 inside the geothermal well 1. The reinforcement frame 2 is located between the inner protection tube 3 and the inner wall of the geothermal well 1. After installation, the staff pours the mixed filler 4 into the reinforcement frame 2 to fix the inner protection tube 3 and the reinforcement frame 2, and prevent the space between the geothermal well 1 and the inner protection tube 3 from being too empty, which affects the erection of the inner protection tube 3. The middle of the inner protection tube 3 is hollow without obstacles, facilitating the steam and water inside the geothermal well 1 to surge through the inner protection tube 3. The staff fixedly connects the retaining frame to the inner protection tube 3, and then installs the retaining frame at the wellhead of the geothermal well 1. The retaining screw 7 is used to penetrate the wellhead retaining frame 5, and mechanical equipment is used to penetrate the mixed filler 4 with the retaining screw 7 and drive it into the soil layer at the bottom of the geothermal well 1. The mixed filler 4 accumulates in the thread grooves on the surface of the retaining screw 7 to lock and fix the retaining screw 7, strengthening the installation of the inner protection tube 3 and the reinforcement frame 2 and preventing the reinforcement frame 2 and the inner protection tube 3 from collapsing.

[0036] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A geothermal development well reinforcement device, comprising a geothermal well (1), a reinforcement frame (2) and an inner protective pipe (3), characterized in that: The inner protective pipe (3) is located inside the geothermal well (1); the reinforcement frame (2) is located between the geothermal well (1) and the inner protective pipe (3); the reinforcement frame (2) comprises a plurality of inner rings (201), outer rings (202) and a connecting frame (203); the inner wall of the inner ring (201) is welded to the outside of the inner protective pipe (3); the outer wall of the outer ring (202) is fitted and connected to the inner wall of the geothermal well (1); the outer ring (202) is located outside the inner ring (201); the inner ring (201) and the outer ring (202) are both fixedly connected via the connecting frame (203); and a mixed filler (4) is provided between the geothermal well (1) and the inner protective pipe (3).

2. A geothermal development well reinforcement device according to claim 1, characterized in that: The mixed filler (4) is filled in the internal space of the reinforcement frame (2), and a wellhead retaining frame (5) is fixedly installed on the top of the geothermal well (1).

3. A geothermal development well reinforcement device according to claim 2, characterized in that: The wellhead retaining frame (5) is provided with a plug-in groove (501) inside, the top of the inner protective pipe (3) is butted against the inside of the plug-in groove (501), and a plurality of plug-in rods (301) are fixedly mounted on the bottom of the inner protective pipe (3).

4. A geothermal development well reinforcement device according to claim 3, characterized in that: The inner protective pipe (3) is fixedly connected to the wellhead retaining frame (5) via retaining bolts, and a wellhead pipe (6) is provided on the top of the inner protective pipe (3).

5. A geothermal development well reinforcement device according to claim 4, characterized in that: The wellhead pipe (6) is fixedly connected to the top of the wellhead fixing frame (5), and a plurality of fixing screws (7) are arranged outside the wellhead pipe (6), and the fixing screws (7) are located outside the plug-in rod (301).

6. A geothermal well reinforcement device according to claim 5, characterized in that: The retaining screw (7) passes through the wellhead retaining frame (5) and is threadedly connected to the middle of the mixed filler (4); the retaining screw (7) is located between the inner ring (201) and the outer ring (202).

Images