Device and method for sealing drilling well wall with microbial mixture

Abstract

The present invention discloses a device and method for sealing a wellbore wall with a microbial mixture, which relates to the field of drilling engineering. The device comprises a connecting pipe, on which a plurality of sealing devices are provided. The sealing device comprises a discharge pipe, wherein the connecting pipe and the discharge pipe constitute a sealing pipe body, wherein an inner casing is provided in the sealing pipe, and the inner casing is consistent in length with the sealing pipe. The sealing device further comprises a pair of discharge plates, wherein a connecting block is provided between the discharge plates and the discharge pipe. The present invention detects the pH value of the soil on the wellbore wall in real time through a detection device in the connecting block between the discharge plate and the discharge pipe. Based on the detection result, the discharge of the acid-base neutralizing liquid in the reaction chamber is controlled to fully adjust the pH value with the microbial mixture. In this way, the microorganisms can be effectively guaranteed to react in a suitable acid-base environment, significantly improving the depth and speed of calcium carbonate formation, and effectively enhancing the strength of the wellbore wall.

Description

Technical Field

[0001] The present invention relates to the field of drilling engineering, and in particular to a device and method for sealing a drilling well wall with a microbial mixed liquid. Background Art

[0002] In the field of drilling engineering, the limitations of traditional wellbore sealing technologies are becoming increasingly apparent, prompting the industry to actively explore new and efficient sealing technologies. Microbial sealing technology, due to its environmentally friendly nature and unique reaction mechanism, has gradually become a research hotspot. This technology utilizes the metabolic activity of microorganisms to trigger chemical reactions at the wellbore wall, forming a stable reinforcement material, providing a new approach to solving wellbore stability issues.

[0003] Currently, microbial sealing technology has been used experimentally in some drilling operations. The basic principle is to inject a mixture containing specific microorganisms into the well. Under favorable conditions, the microorganisms grow and multiply, secreting enzymes that catalyze chemical reactions in the substrate, thereby producing minerals such as calcium carbonate on the surface or in the pores of the wellbore, thus strengthening the wellbore. However, existing microbial sealing technology is still in its developmental stages, and many areas need to be improved before it can be put into practical use.

[0004] The operating procedures of existing microbial sealing technology are roughly as follows: first, a microbial mixture is prepared on the ground, and then it is injected into the well through drilling equipment.

[0005] However, the underground environment is complex and changeable, and the soil pH and temperature in different well sections vary greatly. Existing technologies cannot adjust the properties of the microbial mixture in real time according to these environmental factors, and the microbial activity and reaction efficiency are easily affected. At the same time, there is a lack of effective collection and analysis mechanisms for well wall materials, making it difficult to optimize the microbial sealing scheme for different well wall conditions, resulting in unstable well wall sealing effects and difficulty in meeting the needs of drilling operations under complex geological conditions. Summary of the Invention

[0006] Based on this, the purpose of the present invention is to provide a device and method for sealing the wellbore wall with a microbial mixture, so as to solve the technical problem that the existing technology lacks a wellbore material analysis mechanism, resulting in low microbial activity and unstable sealing effect.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device and method for sealing the well wall of a microbial mixture, comprising a connecting pipe, a plurality of sealing devices are arranged on the connecting pipe, the sealing device comprises a discharge pipe, the connecting pipe and the discharge pipe constitute a sealing pipe body, an inner sleeve is arranged in the sealing pipe, the inner sleeve is consistent with the length of the sealing pipe, the sealing device further comprises a pair of discharge plates, a connecting block is arranged between the discharge plate and the discharge pipe, the discharge plate and the discharge pipe are connected by a connecting block, a detection device is arranged in the connecting block, a plurality of collecting devices are arranged on the sealing pipe in conjunction with the plurality of sealing devices, a plurality of discharge troughs are opened on the outer wall of the discharge pipe, and the discharge troughs are connected to the space between the discharge pipe and the inner sleeve.

[0008] By adopting the above technical solution, the collection device is used in conjunction with the detection device to collect and detect the material in the well, and then the pH value of the material is detected.

[0009] The present invention is further configured as follows: the collecting device includes a mounting piece, a pair of collecting ports are symmetrically provided on the mounting piece, a pair of collecting rollers are symmetrically provided in the collecting ports, a mixing chamber is provided in the mounting piece to match the collecting port, a conveying pipe is provided at one end of the mixing chamber close to the discharge pipe, the conveying pipe is connected to the detection device, a control motor is provided in the mixing chamber to match the collecting roller, an induction device is provided in the mixing chamber to match the control motor, a number of electromagnets are provided in the sealing pipe to match the induction device, a transmission cable is provided in the sealing pipe to match the electromagnets, and the electromagnets are connected through the transmission cable.

[0010] By adopting the above technical solution, the collection roller in the collection device in the device is controlled to collect the materials.

[0011] The present invention is further configured as follows: the detection device includes a mounting block, a reaction chamber is provided in the mounting block, the delivery pipe is connected to the reaction chamber, an acid-base reaction sheet is provided in the reaction chamber, the acid-base reaction sheet is fixedly connected to the guide rod on the side away from the delivery pipe, a slide groove is provided on the side of the reaction chamber away from the inner sleeve, a slide plate is slidably provided in the slide groove, the slide plate is connected to the guide rod, a second discharge port is provided on the slide plate, a first discharge port is provided on the inner wall of the discharge pipe to cooperate with the second discharge port, the discharge pipe is configured to be hollow, and the discharge trough is connected to the inside of the discharge pipe.

[0012] By adopting the above technical solution, after the material is collected, the movement of the slide is controlled according to the pH value, thereby controlling the outflow of the neutralization liquid in the reaction chamber, and then adjusting the pH value of the microbial mixture.

[0013] The present invention is further configured such that a plurality of heating rings are provided in the sealing pipe in conjunction with a plurality of sealing devices on the transmission cable, the heating rings are in contact with the inner wall of the inner sleeve, a plurality of mounting plates are provided in the heating rings, and the mounting plates are connected to the transmission cable.

[0014] By adopting the above technical solution, the temperature of the microbial mixture can be regulated, thereby ensuring the growth environment of the microorganisms.

[0015] The present invention is further configured such that a plurality of support plates are provided around the outer periphery of the inner sleeve, and the support plates are connected to the inner wall of the connecting pipe.

[0016] By adopting the above technical solution, support for the inner casing is achieved.

[0017] The present invention is further configured such that the induction device includes a mounting groove, a magnetron conductor is provided in the mounting groove to cooperate with the electromagnet, and a reset spring is provided on a side of the magnetron conductor away from the electromagnet.

[0018] By adopting the above technical solution, it is possible to realize that as the electromagnet is turned on, the magnetically controlled conductor is displaced, thereby controlling the motor to be turned on and collecting the well wall material.

[0019] In summary, the present invention mainly has the following beneficial effects:

[0020] The present invention uses a detection device within the connecting block between the discharge plate and the discharge pipe to monitor the soil pH in real time. Based on the test results, the acid-base neutralization solution in the reaction chamber is discharged to fully adjust the pH with the microbial mixture. This effectively ensures that the microorganisms react in a suitable acid-base environment, significantly increasing the depth and speed of calcium carbonate formation and effectively strengthening the well wall.

[0021] This invention utilizes a collection device consisting of a collection roller and mixing chamber mounted on a mounting assembly to collect wellbore material and deliver it via a delivery pipe to a reaction chamber for analysis. Simultaneously, a transmission cable controls an electromagnet, which, in conjunction with a heating ring, precisely regulates the temperature. This complete process optimizes reaction conditions based on the environmental characteristics of different well sections, maintaining a stable microbial reaction environment and significantly improving the reliability and stability of the wellbore sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic diagram of the sealing device of the present invention;

[0024] Figure 3 This is a schematic diagram of the interior of the inner sleeve of the present invention;

[0025] Figure 4It is a schematic diagram of the collecting device of the present invention;

[0026] Figure 5 It is a partial structural schematic diagram of the collecting device of the present invention;

[0027] Figure 6 This is a schematic diagram of the sealing pipeline structure of the present invention;

[0028] Figure 7 is a cross-sectional view of the sealed pipeline of the present invention;

[0029] Figure 8 is a side sectional view of the sealing device of the present invention;

[0030] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of point A in the middle.

[0031] In the figure: 1. Connecting pipe; 2. Discharge pipe; 3. Collecting roller; 4. Mounting part; 5. Electromagnet; 6. Transmission cable; 7. Discharge trough; 8. First discharge port; 9. Mounting block; 10. Conveying pipe; 11. Support plate; 12. Inner sleeve; 13. Mounting plate; 14. Discharge plate; 15. Heating ring; 16. Mixing chamber; 17. Control motor; 18. Magnetron conductor; 19. Mounting slot; 20. Reset spring; 21. Reaction chamber; 22. Guide rod; 23. Acid-base reaction sheet; 24. Slide plate; 25. Second discharge port; 26. Slide; 27. Connecting block; 28. Collecting port. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0033] The following describes an embodiment of the present invention based on its overall structure.

[0034] A device and method for sealing a borehole wall with a microbial mixture, such as Figure 1-9 As shown, it includes a connecting pipe 1, on which a plurality of sealing devices are provided. The microbial mixture is output into the well wall through the sealing devices, thereby reacting with the well wall to generate calcium carbonate through the reaction, thereby enhancing the strength of the well wall;

[0035] Specifically, the sealing device includes a discharge pipe 2. The connecting pipe 1 and the discharge pipe 2 form a sealing pipe body. When actually used, the sealing pipe body is inserted into the well.

[0036] An inner sleeve 12 is provided in the sealing pipe, and the inner sleeve 12 is consistent with the length of the sealing pipe. The sealing device also includes a pair of discharge plates 14, and a connecting block 27 is provided between the discharge plate 14 and the discharge pipe 2. The discharge plate 14 and the discharge pipe 2 are connected by the connecting block 27. A detection device is provided in the connecting block 27. The detection device is used to detect the soil pH at each section of the well wall. According to the detection device, the acid-base neutralizing liquid in the reaction chamber 21 is controlled to be discharged into the well, and the acid-base neutralizing liquid is mixed with the microbial mixture and then contacts the well wall to ensure the activity of the microorganism during the reaction and the depth and speed of the reaction of the inner wall of calcium carbonate. Specifically, the detection device includes a mounting block 9, and a reaction chamber 21 is opened in the mounting block 9. The reaction chamber 21 stores the acid-base neutralizing liquid for mixing with the microbial mixture to adjust its acidity and alkalinity. The conveying pipe 10 is connected to the reaction chamber 21, and an acid-base reaction sheet 23 is provided in the reaction chamber 21. The acid-base reaction sheet 23 is fixedly connected to the guide rod 22 on the side away from the conveying pipe 10, and a slide groove 26 is provided on the surface of the reaction chamber 21 away from the inner sleeve 12, and a slide plate 24 is slidably provided in the slide groove 26, and the slide plate 24 is connected to the guide rod 22, and a second discharge port 25 is provided on the slide plate 24. The inner wall of the discharge pipe 2 is provided with a first discharge port 8 to match the second discharge port 25. The discharge pipe 2 is hollow, and the discharge trough 7 is connected with the discharge pipe 2. The acid-base reaction sheet 23 installed in the pair of mounting blocks 9 provided in conjunction with the pair of discharge plates 14 is respectively provided with different acid-base neutralizing liquids for acidic and alkaline materials. In actual use, according to the different properties of the well wall material, it reacts with the acid-base reaction sheet 23 to control the movement of the slide plate 24, so that the first discharge port 8 and the second discharge port 25 coincide with each other, thereby discharging the neutralizing liquid and mixing it with the microbial mixed liquid to neutralize the pH value, thereby ensuring the effect of microbial reaction sealing;

[0037] Furthermore, in the above structure, in conjunction with the detection device, a number of collecting devices are provided on the sealing pipe in conjunction with the number of sealing devices. A number of discharge troughs 7 are provided on the outer wall of the discharge pipe 2. The discharge troughs 7 are connected to the space between the discharge pipe 2 and the inner sleeve 12. Specifically, in actual use, the sealing pipe is inserted into the wellbore, and the well wall is collected by the collecting device, and then the mixed material is transported to the discharge pipe 2, and cooperated with the acid-base reaction sheet 23 provided in the reaction chamber 21. According to the acidity and alkalinity of the well wall material, the acid-base reaction sheet 23 reacts, thereby excluding different neutralizing liquids from reacting, thereby ensuring the reaction environment of the microorganisms.

[0038] In the above structure, the collecting device includes a mounting member 4, a pair of collecting ports 28 are symmetrically provided on the mounting member 4, a pair of collecting rollers 3 are symmetrically provided in the collecting ports 28, the pair of collecting rollers 3 are in contact with the well wall, and the materials on the inner wall of the well wall are collected into the mounting member 4 by the rotation of the collecting rollers 3, a mixing chamber 16 is provided in the mounting member 4 to cooperate with the collecting port 28, and the materials enter the mixing chamber 16 to complete the collection, and the mixing chamber 16 is provided with a conveying pipe 10 at one end close to the discharge pipe 2, and the conveying pipe 10 is connected to the detection device, so that the materials enter the reaction chamber 21 of the detection device through the conveying pipe 10 for reaction;

[0039] On the basis of the above structure, a control motor 17 is provided in the mixing chamber 16 in conjunction with the collection roller 3, and an induction device is provided in the mixing chamber 16 in conjunction with the control motor 17, and the induction device includes a mounting groove 19, and a magnetron conductor 18 is provided in the mounting groove 19 in conjunction with the electromagnet 5, and a reset spring 20 is provided on the side of the magnetron conductor 18 away from the electromagnet 5. A plurality of electromagnets 5 are provided in conjunction with the induction device in the sealing pipe, and a transmission cable 6 is provided in conjunction with the electromagnet 5 in the sealing pipe. The electromagnets 5 are connected through the transmission cable 6. In actual use, the movement of the magnetron conductor 18 is controlled by opening and closing the electromagnet 5, and a corresponding contact conductor is provided in the mounting groove 19 in conjunction with it. When the electromagnet 5 is turned on, the magnetron conductor 18 and the contact conductor are in contact to turn on the control motor 17 to collect materials.

[0040] Furthermore, a number of heating rings 15 are provided in the sealing pipe in conjunction with a number of sealing devices on the transmission cable 6. The heating rings 15 are in contact with the inner wall of the inner sleeve 12. A number of mounting plates 13 are provided in the heating rings 15. The mounting plates 13 are connected to the transmission cable 6. The heating rings 15 are powered by the transmission cable 6, thereby providing heating treatment for the sealing devices in designated sections, allowing the microorganisms to be in a stable reaction environment and ensuring the efficiency of the microbial reaction.

[0041] A plurality of support plates 11 are provided around the outer periphery of the inner sleeve 12 , and the support plates 11 are connected to the inner wall of the connecting pipe 1 . The support plates 11 support the inner sleeve 12 to ensure the normal operation of the device.

[0042] The device described in the above content is a partial structure of the pipeline. The entire pipeline is composed of multiple identical devices. Each section of the structure is separated by a fixed distance, maintaining a certain collection distance, so as to adjust the pH value of the microbial mixture according to the pH value of the well wall material in different sections, thereby maximizing the effect of the microbial reaction.

[0043] Specifically, in actual use, a certain amount of water is first injected into the wellbore, and then the pipe is inserted into the wellbore. According to the length of the wellbore, a certain length of the device is selected. After the device is completely entered into the wellbore, the transmission cable 6 is controlled to transmit power, thereby controlling the opening and closing of the electromagnet 5, and then the collecting device collects the well wall material into the device. At this time, because of the water poured in advance, under the action of the collecting device, the material slurry is transported to the mounting block 9 through the conveying pipe 10 for reaction. According to the different acidity and alkalinity of the material, the reaction occurs to cause the acid-base reaction sheet 23 to deform, causing the neutralization liquid to leak out, and the microbial mixture to mix and adjust the pH value, so that it contacts and penetrates with the well wall to carry out a chemical reaction. At the same time, the heating ring 15 is controlled to open according to the use requirements, and the temperature of the microbial mixture output by the section is controlled to ensure the reaction environment of the microbial mixture.

[0044] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A device for sealing a borehole wall with a microbial mixture, comprising a connecting pipe (1), characterized in that: The connecting pipe (1) is provided with a plurality of sealing devices, the sealing devices including a discharge pipe (2), the connecting pipe (1) and the discharge pipe (2) forming a sealing pipe body, an inner sleeve (12) being provided in the sealing pipe, the inner sleeve (12) being consistent in length with the sealing pipe, the sealing device further comprising a pair of discharge plates (14), a connecting block (27) being provided between the discharge plates (14) and the discharge pipe (2), the discharge plates (14) and the discharge pipe (2) being connected via the connecting block (27), a detecting device being provided in the connecting block (27), a plurality of collecting devices being provided on the sealing pipe in conjunction with the plurality of sealing devices, the The outer wall of the discharge pipe (2) is provided with a plurality of discharge troughs (7), the space between the discharge pipe (2) and the inner sleeve (12) is connected to the discharge trough (7), the collecting device comprises a mounting member (4), a pair of collecting ports (28) are symmetrically provided on the mounting member (4), a pair of collecting rollers (3) are symmetrically provided in the collecting ports (28), a mixing chamber (16) is provided in the mounting member (4) in conjunction with the collecting ports (28), a conveying pipe (10) is provided at one end of the mixing chamber (16) close to the discharge pipe (2), the conveying pipe (10) is connected to the detection device, a control device is provided in the mixing chamber (16) in conjunction with the collecting rollers (3) The control motor (17) is provided in the mixing chamber (16) in conjunction with the control motor (17), a sensing device is provided in the sealing pipe in conjunction with the sensing device, a plurality of electromagnets (5) are provided in the sealing pipe in conjunction with the electromagnets (5), and the electromagnets (5) are connected via the transmission cable (6). The detection device includes a mounting block (9), a reaction chamber (21) is provided in the mounting block (9), and the reaction chamber (21) stores an acid-base neutralization liquid. The delivery pipe (10) is connected to the reaction chamber (21), and an acid-base reaction sheet (23) is provided in the reaction chamber (21). A pair of acid-base reaction sheets (23) are installed in the mounting block (9). The thin slices (23) are respectively provided for acidic and alkaline materials. The acid-base reaction thin slice (23) is fixedly connected to the guide rod (22) on the side away from the conveying pipe (10). A slide groove (26) is provided on the side of the reaction chamber (21) away from the inner sleeve (12). A slide plate (24) is slidably provided in the slide groove (26). The slide plate (24) is connected to the guide rod (22). A second discharge port (25) is provided on the slide plate (24). A first discharge port (8) is provided on the inner wall of the discharge pipe (2) to match the second discharge port (25). The discharge pipe (2) is provided with a hollow interior. The discharge trough (7) is connected to the inside of the discharge pipe (2).

2. The device for sealing a borehole wall with a microbial mixture according to claim 1, characterized in that: A plurality of heating rings (15) are provided in the sealing pipe on the transmission cable (6) in cooperation with a plurality of sealing devices. The heating rings (15) are in contact with the inner wall of the inner sleeve (12). A plurality of mounting plates (13) are provided in the heating rings (15). The mounting plates (13) are connected to the transmission cable (6).

3. The device for sealing a wellbore wall with a microbial mixture according to claim 2, characterized in that: A plurality of support plates (11) are provided around the outer periphery of the inner sleeve (12), and the support plates (11) are connected to the inner wall of the connecting pipe (1).

4. The device for sealing a wellbore wall with a microbial mixture according to claim 3, characterized in that: The induction device comprises a mounting groove (19), a magnetron conductor (18) is provided in the mounting groove (19) in cooperation with the electromagnet (5), and a return spring (20) is provided on a side of the magnetron conductor (18) away from the electromagnet (5).

5. A method for using a microbial mixture sealing drilling well wall device according to any one of claims 2 to 4, characterized in that The following steps are involved: Step 1: First, inject a certain amount of water into the well, then insert the pipe into the well. According to the length of the well, select a device of a certain length and insert it into the well; Step 2: After the device is completely inserted into the well, the transmission cable (6) is controlled to transmit power, thereby controlling the opening and closing of the electromagnet (5), and then collecting the well wall material into the device. At this time, due to the water poured in advance, the material slurry is transported to the installation block (9) through the delivery pipe (10) for reaction under the action of the collection device; Step 3: According to the different acidity and alkalinity of the material, a reaction occurs to cause the acid-base reaction sheet (23) to deform, causing the acid-base neutralization liquid to leak out and mix with the microbial mixture to adjust the pH, so that it contacts and penetrates the well wall to carry out a chemical reaction; Step 4: At the same time, the heating ring (15) is controlled to open according to the use requirements, and the temperature of the microbial mixture output from the section is controlled to ensure the reaction environment of the microbial mixture.

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