A deep geosequestration well system

Abstract

The present application relates to a kind of deep geologic storage well systems, by the setting of scraping plug and the like device, the sealing thermoplastic resin in the storage pipe inside is high-temperature melting state, concrete enters between well body and casing pipe by casing pipe and one-way valve, when concrete is filled, scraping plug is put into the inside of casing pipe, and scraping plug moves to the direction of one-way valve by the action of pressure, when scraping plug moves to the position of base body, scraping plug cannot continue to move downward, then the pressure of the upper side of scraping plug becomes larger, simultaneously hollow needle breaks sealing block, forced plug is pushed down sealing thermoplastic resin by extruding plug under the action of pressure, makes sealing thermoplastic resin extrude outward through hollow needle, fills the channel, after sealing thermoplastic resin solidifies, it can play the sealing effect to channel, greatly improves the sealing effect of concrete, prevents the situation that concrete flows back to casing pipe, improves the safety and stability of storage well.

Description

Technical Field

[0001] The present invention relates to a deep earth storage well system, and more particularly to a deep earth storage well system applied in the field of storage wells. Background Technology

[0002] During the construction of deep-ground sealing wells, the well body is first drilled out using a drill bit, then the casing is lowered, and then concrete is pressed into the casing to fill the space between the casing and the well body. The construction is completed after the concrete has solidified.

[0003] A float collar is usually installed at the bottom of the casing to prevent the concrete pressed between the casing and the well body from flowing back to the inner wall of the casing. When the casing is long, relying solely on the float collar to prevent concrete backflow is too risky. Once concrete backflows into the casing, it will seriously affect the construction progress.

[0004] Application content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that relying solely on floating hoops to prevent concrete backflow results in unreliable sealing effect and a high risk factor.

[0006] To address the aforementioned problems, this invention provides a deep-earth storage well system, comprising a well body, a casing disposed on the inner side of the well body, a scraper plug slidably connected to the inner wall of the casing, the scraper plug comprising a drive tube and a storage tube, the drive tube and the storage tube being fixedly connected, a push rod slidably connected through the drive tube and the storage tube, a force-bearing plug fixedly connected to one end of the push rod located inside the drive tube, and a compression plug fixedly connected to one end of the push rod located inside the storage tube, the force-bearing plug and the compression plug being respectively slidably and sealingly connected to the drive tube and the storage tube, a top spring fixedly connected between the force-bearing plug and the inner wall of one end of the drive tube, an injection tube fixedly connected to the bottom end of the storage tube, a sealing block fixedly connected to the inner wall of the bottom end of the injection tube, the interior of the storage tube being filled with sealing thermoplastic resin, a rubber sleeve being fitted between the outer walls of the drive tube and the storage tube, a base being fixedly connected to the inner wall of the bottom end of the well body, a channel being formed between the upper and lower surfaces of the base, a hollow needle being fixedly connected to the middle of the top end of the base, and a leakage hole being formed on the side wall of the bottom end of the hollow needle.

[0007] As a further improvement of this application, a barrier plug is slidably connected to the inner wall of the sleeve, the barrier plug is located below the scraper plug, and the inside of the sleeve is filled with cleaning fluid, which is located between the scraper plug and the barrier plug; through the above arrangement, not only can the adhesion effect of the sealing thermoplastic resin be improved, but also the residual concrete inside the sleeve can be avoided.

[0008] As a further improvement of this application, the barrier plug includes a silicone sleeve, the inner ring of which is fixedly connected to a connecting ring, and the inner wall of the connecting ring is fixedly connected to a barrier thermoplastic resin.

[0009] As a further improvement of this application, a heating ring is fixedly connected to the outer wall of the bottom end of the sleeve, and the sleeve located above the heating ring is made of heat-insulating material; through the above arrangement, the channel can be sealed better, further improving the sealing effect of the sealing thermoplastic resin.

[0010] As another improvement of this application, a limiting ring is fixedly connected to the top of the substrate, and the height of the limiting ring is greater than the height of the hollow needle; the limiting ring can protect the hollow needle.

[0011] As a further improvement to this application, the inner wall of the channel is corrugated, and the storage tube is made of heat-insulating material.

[0012] In summary, by using devices such as scrapers, the sealing thermoplastic resin inside the storage pipe is in a high-temperature molten state. Concrete enters the space between the well body and the casing through the casing and a one-way valve. When the concrete is filled, a scraper is inserted into the casing, and pressure causes the scraper to move towards the one-way valve. When the scraper reaches the substrate, it cannot move further downwards, increasing the pressure on the upper side of the scraper. Simultaneously, a hollow needle punctures the sealing block, and the pressure-bearing plug pushes the sealing thermoplastic resin downwards through the extrusion plug, causing the resin to be squeezed outwards through the hollow needle, filling the channel. After the resin solidifies, it seals the channel, greatly improving the sealing effect of the concrete and preventing backflow of concrete into the casing, thus enhancing the safety and stability of the storage well. Attached Figure Description

[0013] Figure 1 This is an overall structural diagram of the first embodiment of this application;

[0014] Figure 2 This is a diagram showing the state when the concrete inside the casing is completely pressed into the well body in the first embodiment of this application.

[0015] Figure 3 This is a frontal cross-sectional view of the scraper plug in the first and second embodiments of this application;

[0016] Figure 4 These are front cross-sectional views of the substrate in the first and second embodiments of this application;

[0017] Figure 5 This is a front cross-sectional view of the barrier plug in the first and second embodiments of this application;

[0018] Figure 6 These are state diagrams of the sealing thermoplastic resin during extrusion in the first and second embodiments of this application.

[0019] Figure 7This is a perspective view of the scraper plug in the first embodiment of this application;

[0020] Figure 8 This is a perspective view of the barrier plug in the first embodiment of this application.

[0021] Explanation of the labels in the diagram:

[0022] 1. Well body; 2. Casing; 201. Check valve; 3. Scraper plug; 301. Drive tube; 302. Storage tube; 303. Top rod; 304. Force plug; 305. Squeeze plug; 306. Top spring; 307. Injection tube; 308. Sealing block; 309. Sealing thermoplastic resin; 310. Rubber sleeve; 4. Matrix; 401. Channel; 402. Hollow needle; 403. Leakage hole; 404. Limiting ring; 5. Barrier plug; 501. Silicone sleeve; 502. Connecting ring; 503. Barrier thermoplastic resin; 6. Heating ring. Detailed Implementation

[0023] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] First implementation method:

[0025] Figure 1-8This invention illustrates a deep-ground storage well system, comprising a well body 1, a casing 2 disposed inside the well body 1, and a scraper plug 3 slidably connected to the inner wall of the casing 2. The scraper plug 3 includes a drive tube 301 and a storage tube 302, which are fixedly connected. A push rod 303 is slidably connected through the drive tube 301 and the storage tube 302. One end of the push rod 303 located inside the drive tube 301 is fixedly connected to a force-bearing plug 304, and the other end of the push rod 303 located inside the storage tube 302 is fixedly connected to a compression plug 305. The pressure plug 305 is slidably connected to the drive tube 301 and the storage tube 302 respectively. A top spring 306 is fixedly connected between the force-bearing plug 304 and the inner wall of one end of the drive tube 301. An injection tube 307 is fixedly connected to the bottom end of the storage tube 302. A sealing block 308 is fixedly connected to the inner wall of the bottom end of the injection tube 307. The inside of the storage tube 302 is filled with sealing thermoplastic resin 309. A rubber sleeve 310 is fitted between the outer walls of the drive tube 301 and the storage tube 302. A base 4 is fixedly connected to the inner wall of the bottom end of the well body 1. An opening is formed between the upper and lower surfaces of the base 4. A channel 401 is provided, and a hollow needle 402 is fixedly connected to the middle of the top of the base 4. A leakage hole 403 is provided on the side wall of the bottom end of the hollow needle 402. The sealing thermoplastic resin 309 inside the storage pipe 302 is in a high-temperature molten state. Concrete enters between the well body 1 and the casing 2 through the casing 2 and the one-way valve 201. When the concrete is filled, a scraper plug 3 is inserted into the casing 2, and pressure causes the scraper plug 3 to move towards the one-way valve 201. When the scraper plug 3 reaches the position of the base 4, it cannot move further downwards. The pressure on the upper side of the scraper plug 3 increases, and at the same time, the hollow needle 402 punctures the sealing block 308. Under the pressure, the force-bearing plug 304 pushes the sealing thermoplastic resin 309 downward through the extrusion plug 305, causing the sealing thermoplastic resin 309 to be squeezed outward through the hollow needle 402 and fill the channel 401. After the sealing thermoplastic resin 309 solidifies, it can seal the channel 401, greatly improving the sealing effect of the concrete and preventing the concrete from flowing back into the casing 2, thus improving the safety and stability of the sealing well.

[0026] Second implementation method:

[0027] Figure 3-6This invention illustrates a deep-earth sealing well system. Unlike the first embodiment, a barrier plug 5 is slidably connected to the inner wall of the casing 2. The barrier plug 5 is located below the scraper plug 3. The inside of the casing 2 is filled with cleaning fluid, which is located between the scraper plug 3 and the barrier plug 5. The cleaning fluid can be water or other liquids with flushing function. Concrete is located below the barrier plug 5, and concrete residue will remain on the inner wall of the channel 401, affecting the adhesion of the sealing thermoplastic resin 309. With the above arrangement, after the concrete is discharged from the inside of the casing 2, the scraper plug 3 continues to move downward, and the cleaning fluid can discharge the concrete residue inside the casing 2 to the outside, cleaning the channel 401. This not only improves the adhesion of the sealing thermoplastic resin 309 but also avoids concrete residue inside the casing 2.

[0028] The barrier plug 5 includes a silicone sleeve 501, with a connecting ring 502 fixedly connected to the inner ring of the silicone sleeve 501. A barrier thermoplastic resin 503 is fixedly connected to the inner wall of the connecting ring 502. A heating ring 6 is fixedly connected to the outer wall of the bottom end of the sleeve 2. The sleeve 2 located above the heating ring 6 is made of heat-insulating material. Because the sealing thermoplastic resin 309 solidifies quickly upon cooling, it solidifies before completely filling the channel 401, resulting in a poor sealing effect. Through the above setup, the barrier thermoplastic resin 503 is initially a low-temperature solid. When the barrier plug 5 moves to the position of the substrate 4 and cannot move further... The heating ring 6 heats the cleaning fluid between the scraper plug 3 and the barrier plug 5 until the barrier thermoplastic resin 503 melts. At this time, the cleaning fluid with a higher temperature can pass through the channel 401 to preheat it. Then, when the sealing thermoplastic resin 309 is filled into the interior of the channel 401, it has good fluidity and will not solidify quickly, so it can better seal the channel 401 and further improve the sealing effect of the sealing thermoplastic resin 309. The top of the substrate 4 is fixedly connected to a limiting ring 404. The height of the limiting ring 404 is greater than the height of the hollow needle 402. The setting of the limiting ring 404 can protect the hollow needle 402.

[0029] The inner wall of channel 401 is corrugated, and storage tube 302 is made of heat-insulating material.

[0030] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A deep-earth storage well system, comprising a well body (1), wherein a casing (2) is disposed on the inner side of the well body (1), characterized in that: A scraper plug (3) is slidably connected to the inner wall of the sleeve (2). The scraper plug (3) includes a drive tube (301) and a storage tube (302). The drive tube (301) and the storage tube (302) are fixedly connected. A push rod (303) is slidably connected through the drive tube (301) and the storage tube (302). One end of the push rod (303) located inside the drive tube (301) is fixedly connected to a force-bearing plug (304). One end of the push rod (303) located inside the storage tube (302) is fixedly connected to a compression plug (305). The force-bearing plug (304) and the compression plug (305) are respectively slidably connected to the drive tube (301) and the storage tube (302). The force-bearing plug (304) and the drive tube... A top spring (306) is fixedly connected between the inner walls of one end of the storage tube (302), an injection tube (307) is fixedly connected to the bottom end of the storage tube (302), a sealing block (308) is fixedly connected to the inner wall of the bottom end of the injection tube (307), the storage tube (302) is filled with sealing thermoplastic resin (309), a rubber sleeve (310) is fitted between the outer walls of the drive tube (301) and the storage tube (302), a base (4) is fixedly connected to the inner wall of the bottom end of the well body (1), a channel (401) is opened between the upper and lower surfaces of the base (4), a hollow needle (402) is fixedly connected to the middle of the top end of the base (4), and a leak hole (403) is opened on the side wall of the bottom end of the hollow needle (402).

2. The deep-earth storage well system according to claim 1, characterized in that: The inner wall of the sleeve (2) is slidably connected with a blocking plug (5), which is located below the scraper plug (3).

3. A deep-earth storage well system according to claim 2, characterized in that: The sleeve (2) is filled with cleaning fluid, which is located between the scraper plug (3) and the barrier plug (5).

4. A deep-earth storage well system according to claim 2, characterized in that: The barrier plug (5) includes a silicone sleeve (501), the inner ring of which is fixedly connected to a connecting ring (502), and the inner wall of the connecting ring (502) is fixedly connected to a barrier thermoplastic resin (503).

5. A deep-earth storage well system according to claim 1, characterized in that: A heating ring (6) is fixedly connected to the outer wall of the bottom end of the sleeve (2), and the sleeve (2) located on the upper side of the heating ring (6) is made of heat insulation material.

6. A deep-earth storage well system according to claim 1, characterized in that: A limiting ring (404) is fixedly connected to the top of the substrate (4), and the height of the limiting ring (404) is greater than the height of the hollow needle (402).

7. A deep-earth storage well system according to claim 1, characterized in that: The inner wall of the channel (401) is corrugated, and the storage tube (302) is made of heat-insulating material.

Images