Device and method for sealing well wall of drilling well through microorganism mixed liquid

Abstract

The invention discloses a device and method for sealing a drilling well wall through microorganism mixed liquid, and relates to the field of drilling engineering.The device comprises a connecting pipe, a plurality of sealing devices are arranged on the connecting pipe, each sealing device comprises a discharging pipe, the connecting pipe and the discharging pipes form a sealing pipeline main body, an inner sleeve is arranged in the sealing pipeline, and the inner sleeve is connected with the connecting pipe. The length of the inner sleeve is consistent with that of the sealing pipeline, the sealing device further comprises a pair of discharging plates, and connecting blocks are arranged between the discharging plates and the discharging pipe. The detection device in the connecting block between the discharging plate and the discharging pipe is used for detecting the acidity and alkalinity of soil of the well wall in real time, and according to the detection result, acid-base neutralization liquid in the reaction cavity is controlled to be discharged, and the acidity and alkalinity are fully adjusted with microorganism mixed liquid, so that microorganisms can be effectively guaranteed to react in a proper acid-base environment, and the yield of the well wall soil is improved. The generation depth and speed of calcium carbonate are obviously improved, and the well wall strength is practically enhanced.

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. 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. 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

[0004] 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.

[0005] To achieve the above object, the present invention provides the following technical solutions: A device and method for sealing a drilling wellbore with a microbial mixture, including a connecting pipe, on which a number of sealing devices are provided. The sealing device includes a discharge pipe. The connecting pipe and the discharge pipe form the main body of the sealing pipeline. An inner sleeve is arranged in the sealing pipeline, and the length of the inner sleeve is the same as that of the sealing pipeline. The sealing device further includes a pair of discharge plates, and a connecting block is arranged between the discharge plate and the discharge pipe. The discharge plate and the discharge pipe are connected through the connecting block. A detection device is arranged in the connecting block. A number of collection devices are arranged on the sealing pipeline corresponding to the number of sealing devices. A number of discharge slots are opened on the outer wall of the discharge pipe, and the discharge slots are connected to the space between the discharge pipe and the inner sleeve.

[0006] By adopting the above technical solutions, the collection and detection of the materials in the well are carried out through the cooperation of the collection device and the detection device, and then the pH value of the materials is detected.

[0007] The present invention is further configured such that the collection device includes a mounting member, on which a pair of collection ports are symmetrically opened. A pair of collection rollers are symmetrically arranged in the collection ports. A mixing chamber is opened in the mounting member corresponding to the collection ports. One end of the mixing chamber close to the discharge pipe is provided with a delivery pipe, and the delivery pipe is connected to the detection device. A control motor is arranged in the mixing chamber corresponding to the collection rollers. An induction device is arranged in the mixing chamber corresponding to the control motor. A number of electromagnets are arranged in the sealing pipeline corresponding to the induction device. A transmission cable is arranged in the sealing pipeline corresponding to the electromagnets, and the electromagnets are connected through the transmission cable.

[0008] By adopting the above technical solutions, the control of the collection rollers in the collection device in the device is realized, so as to collect the materials.

[0009] The present invention is further configured such that the detection device includes a mounting block, in which a reaction chamber is opened. The delivery pipe is communicated with the reaction chamber. An acid-base reaction sheet is arranged in the reaction chamber. A guide rod is fixedly connected to the side of the acid-base reaction sheet away from the delivery pipe. A chute is opened on the surface of the reaction chamber away from the inner sleeve. A slide plate is slidably arranged in the chute, and the slide plate is connected to the guide rod. A second discharge port is opened on the slide plate, and a first discharge port is opened on the inner wall of the discharge pipe corresponding to the second discharge port. The discharge pipe is arranged to be hollow, and the discharge slot is communicated with the inside of the discharge pipe.

[0010] By adopting the above technical solutions, when the materials are collected, the movement of the slide plate is controlled according to the pH value, so as to control the outflow of the acid-base neutralization liquid in the reaction chamber, and then adjust the pH value of the microbial mixture.

[0011] The present invention is further configured such that a plurality of heating rings are arranged on the transmission cable in the sealing pipeline in cooperation with a plurality of sealing devices. The heating rings are in contact with the inner wall of the inner sleeve. A plurality of mounting plates are arranged in the heating rings, and the mounting plates are connected to the transmission cable.

[0012] By adopting the above technical solution, the temperature of the microbial mixture is adjusted, thereby ensuring the growth environment of the microorganisms.

[0013] The present invention is further configured such that a plurality of support plates are arranged on the outer circumference of the inner sleeve, and the support plates are connected to the inner wall of the connecting pipe.

[0014] By adopting the above technical solution, the support for the inner sleeve is realized.

[0015] The present invention is further configured such that the induction device includes a mounting groove, a magnetically controlled conductor is arranged in the mounting groove in cooperation with an electromagnet, and a return spring is arranged on the side of the magnetically controlled conductor away from the electromagnet.

[0016] By adopting the above technical solution, when the electromagnet is turned on, the magnetically controlled conductor is displaced, thereby controlling the motor to turn on and collecting the materials on the well wall.

[0017] In summary, the present invention mainly has the following beneficial effects: 1. Through the detection device in the connecting block between the discharge plate and the discharge pipe of the device of the present invention, the pH value of the well wall soil is detected in real time. According to the detection result, the acid-base neutralizing liquid in the reaction chamber is controlled to be discharged, and is fully mixed with the microbial mixture to adjust the pH value. In this way, it can effectively ensure that the microorganisms react in a suitable acid-base environment, significantly improve the depth and speed of calcium carbonate formation, and effectively enhance the strength of the well wall; 2. The present invention uses the collection device composed of the collection roller and the mixing chamber on the mounting member to collect the well wall materials and send them into the reaction chamber through the conveying pipe for analysis. At the same time, the electromagnet is controlled through the transmission cable, and the temperature is accurately regulated in cooperation with the heating ring. This whole set of processes can optimize the reaction conditions according to the environmental characteristics of different well sections, maintain the stability of the microbial reaction environment, and greatly improve the reliability and stability of the well wall sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the sealing device of the present invention; Figure 3 is a schematic diagram of the inside of the inner sleeve of the present invention; Figure 4 is a schematic diagram of the collection device of the present invention; Figure 5 is a schematic diagram of a partial structure of the collection device of the present invention; Figure 6 Schematic diagram of the pipe sealing structure of the present invention; Figure 7 Cross-sectional view of the pipe sealing of the present invention; Figure 8 Side cross-sectional view of the sealing device of the present invention; Figure 9 For the present invention Figure 8 Enlarged schematic view at position A in

[0019] In the figure: 1, connecting pipe; 2, discharge pipe; 3, collecting roller; 4, mounting part; 5, electromagnet; 6, transmission cable; 7, discharge chute; 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, magneto-controlled conductor; 19, mounting groove; 20, return spring; 21, reaction chamber; 22, guide rod; 23, acid-base reaction sheet; 24, sliding plate; 25, second discharge port; 26, chute; 27, connecting block; 28, collecting port. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0021] Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0022] A device and method for sealing a drilling wellbore with a microbial mixture, as Figures 1-9 shown, including a connecting pipe 1, and a plurality of sealing devices are provided on the connecting pipe 1. The microbial mixture is output into the wellbore through the sealing devices, so as to react with the wellbore. Through the reaction, calcium carbonate is generated on the wellbore to enhance the strength of the wellbore; Specifically, the sealing device includes a discharge pipe 2. The connecting pipe 1 and the discharge pipe 2 form the main body of the sealing pipe. During actual use, the main body of the sealing pipe is inserted into the wellbore. An inner sleeve 12 is provided in the sealing pipeline. The inner sleeve 12 is of the same length as the sealing pipeline. The sealing device further includes a pair of discharge plates 14. 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 through the connecting block 27. A detection device is provided in the connecting block 27. The provided detection device is used to detect the soil pH value at each section of the well wall position. According to the detection device, the acid-base neutralization liquid in the reaction chamber 21 is discharged into the well, mixed with the microbial mixture and then contacts the well wall to ensure the activity during the microbial reaction, and ensure the depth and speed of the calcium carbonate inner wall reaction. Specifically, the detection device includes a mounting block 9. A reaction chamber 21 is opened in the mounting block 9. The reaction chamber 21 stores the acid-base neutralization liquid, which is used to mix with the microbial mixture to adjust its acidity and alkalinity. The delivery pipe 10 is communicated with the reaction chamber 21. An acid-base reaction thin sheet 23 is provided in the reaction chamber 21. One side of the acid-base reaction thin sheet 23 away from the delivery pipe 10 is fixedly connected with a guide rod 22. A chute 26 is opened on the surface of the reaction chamber 21 away from the inner sleeve 12. A slide plate 24 is slidably arranged in the chute 26. The slide plate 24 is connected with the guide rod 22. A second discharge port 25 is opened on the slide plate 24. A first discharge port 8 is provided on the inner wall of the discharge pipe 2 in cooperation with the second discharge port 25. The discharge pipe 2 is arranged to be hollow. The discharge groove 7 is communicated with the inside of the discharge pipe 2. Particularly, the acid-base reaction thin sheets 23 installed in a pair of mounting blocks 9 provided in cooperation with a pair of discharge plates 14 are respectively provided with different acid-base neutralization liquids for acidic and alkaline materials. During actual use, according to the different properties of the well wall materials, it reacts with the acid-base reaction thin 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, thereby discharging the acid-base neutralization liquid, mixing it with the microbial mixture, and neutralizing the acidity and alkalinity to ensure the effect of microbial reaction sealing; Further, in cooperation with the detection device in the above structure, a plurality of collection devices are provided on the sealing pipeline in cooperation with a plurality of sealing devices. A plurality of discharge grooves 7 are opened on the outer wall of the discharge pipe 2. The inside of the discharge groove 7 is connected to the space between the discharge pipe 2 and the inner sleeve 12. Specifically, during actual use, the sealing pipeline is inserted into the wellbore, the well wall is collected through the collection device, and then the mixed material is transported to the discharge pipe 2. In cooperation with the acid-base reaction thin sheet 23 provided in the reaction chamber 21, according to the acidity and alkalinity of the well wall material, the acid-base reaction thin sheet 23 makes a reaction, thereby discharging different acid-base neutralization liquids for reaction to ensure the reaction environment of the microorganisms.

[0023] In the above structure, the collecting device includes a mounting member 4, on which a pair of collecting ports 28 are symmetrically formed. Inside the collecting ports 28, a pair of collecting rollers 3 are symmetrically arranged. 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. Inside the mounting member 4, a mixing chamber 16 is formed in cooperation with the collecting ports 28. The materials enter the mixing chamber 16 to complete the collection. Correspondingly, a conveying pipe 10 is arranged at one end of the mixing chamber 16 close to the discharge pipe 2. The conveying pipe 10 is connected to the detection device. In this way, the materials enter the reaction chamber 21 of the detection device through the conveying pipe 10 for reaction; On the basis of the above structure, a control motor 17 is arranged in the mixing chamber 16 in cooperation with the collecting rollers 3, and an induction device is arranged in the mixing chamber 16 in cooperation with the control motor 17. The induction device includes a mounting groove 19. Inside the mounting groove 19, a magneto-controlled conductor 18 is arranged in cooperation with an electromagnet 5. A return spring 20 is arranged on the side of the magneto-controlled conductor 18 away from the electromagnet 5. Inside the sealing pipe, a number of electromagnets 5 are arranged in cooperation with the induction device, and a transmission cable 6 is arranged in the sealing pipe in cooperation with the electromagnets 5. The electromagnets 5 are connected through the transmission cable 6. During actual use, the movement of the magneto-controlled conductor 18 is controlled by controlling the opening and closing of the electromagnet 5. Correspondingly, a corresponding contact conductor is arranged in the mounting groove 19. When the electromagnet 5 is turned on, the magneto-controlled conductor 18 and the contact conductor are brought into contact to turn on the control motor 17 for material collection.

[0024] Furthermore, on the transmission cable 6 in the sealing pipe, a number of heating rings 15 are arranged in cooperation with a number of sealing devices. The heating rings 15 are in contact with the inner wall of the inner sleeve 12. Inside the heating rings 15, a number of mounting plates 13 are arranged. The mounting plates 13 are connected to the transmission cable 6. The heating rings 15 are powered by the transmission cable 6, so as to provide heat treatment for the sealing devices in the specified section, keep the microorganisms in a stable reaction environment, and ensure the efficiency of the microbial reaction.

[0025] A number of support plates 11 are arranged around the outer circumference of the inner sleeve 12. 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.

[0026] The device described in the above content is a partial structure of the pipeline. The entire pipeline is composed of multiple such devices, and each section of the structure is separated by a fixed distance to maintain a certain collection distance, so as to adjust the pH value of the microbial mixture according to the acidity and alkalinity of the materials on the well wall in different sections, thereby maximizing the effect of the microbial reaction.

[0027] Specifically, during actual use, first inject a certain amount of water into the hoistway, then insert the pipeline into the hoistway. Select a device length of a certain length according to the length of the hoistway. After the device completely enters the hoistway, transmit power through the control transmission cable 6 to control the opening and closing of the electromagnet 5, and then enable the collection device to collect the well wall materials into the device. Because of the previously poured water, under the action of the collection device at this time, the material slurry is transported through the delivery pipe 10 into the mounting block 9 for reaction. According to the different acid-base degrees of the materials, a reaction occurs to cause the acid-base reaction sheet 23 to deform, causing the acid-base neutralization liquid to leak out, mixing and adjusting the pH of the microbial mixed liquid, making it contact and penetrate the well wall for a chemical reaction. At the same time, according to the usage requirements, control the heating ring 15 to turn on to control the temperature of the microbial mixed liquid output in the control section, so as to ensure the reaction environment of the microbial mixed liquid.

[0028] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An apparatus for sealing a drilling wellbore with a microbial mixture, comprising a connecting pipe (1), characterized in that: A number of sealing devices are provided on the connecting pipe (1). The sealing device includes a discharge pipe (2). The connecting pipe (1) and the discharge pipe (2) form the main body of the sealing pipeline. An inner sleeve (12) is arranged in the sealing pipeline. The inner sleeve (12) is the same length as the sealing pipeline. The sealing device further includes a pair of discharge plates (14). A connecting block (27) is arranged between the discharge plate (14) and the discharge pipe (2). The discharge plate (14) is connected to the discharge pipe (2) through the connecting block (27). A detection device is arranged in the connecting block (27). A number of collecting devices are arranged on the sealing pipeline in cooperation with a number of sealing devices. A number of discharge grooves (7) are formed on the outer wall of the discharge pipe (2). The discharge grooves (7) are connected to the space between the discharge pipe (2) and the inner sleeve (12).

2. The device for sealing and fixing a drilling wellbore with a microbial mixture according to claim 1, characterized in that: The collecting device includes a mounting member (4). A pair of collecting ports (28) are symmetrically formed on the mounting member (4). A pair of collecting rollers (3) are symmetrically arranged in the collecting ports (28). A mixing chamber (16) is formed in the mounting member (4) in cooperation with the collecting ports (28). A conveying pipe (10) is arranged 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 motor (17) is arranged in the mixing chamber (16) in cooperation with the collecting rollers (3). An induction device is arranged in the mixing chamber (16) in cooperation with the control motor (17). A number of electromagnets (5) are arranged in the sealing pipeline in cooperation with the induction device. A transmission cable (6) is arranged in the sealing pipeline in cooperation with the electromagnets (5). The electromagnets (5) are connected through the transmission cable (6).

3. The device for sealing and fixing the drilling wellbore with the microbial mixture according to claim 2, wherein: The detection device includes a mounting block (9). A reaction chamber (21) is formed in the mounting block (9). The conveying pipe (10) is communicated with the reaction chamber (21). An acid-base reaction sheet (23) is arranged in the reaction chamber (21). A guide rod (22) is fixedly connected to the side of the acid-base reaction sheet (23) away from the conveying pipe (10). A chute (26) is formed on the surface of the reaction chamber (21) away from the inner sleeve (12). A slide plate (24) is slidably arranged in the chute (26). The slide plate (24) is connected to the guide rod (22). A second discharge port (25) is formed on the slide plate (24). A first discharge port (8) is formed on the inner wall of the discharge pipe (2) in cooperation with the second discharge port (25). The discharge pipe (2) is hollow. The discharge groove (7) is communicated with the inside of the discharge pipe (2).

4. The device for sealing and fixing a drilling wellbore with a microbial mixture according to claim 2, wherein: A number of heating rings (15) are arranged on the transmission cable (6) in the sealing pipeline in cooperation with a number of sealing devices. The heating rings (15) are in contact with the inner wall of the inner sleeve (12). A number of mounting plates (13) are arranged in the heating rings (15). The mounting plates (13) are connected to the transmission cable (6).

5. The device for sealing and fixing a drilling wellbore with a microbial mixture according to claim 1, characterized in that: A number of support plates (11) are arranged around the outer circumference of the inner sleeve (12). The support plates (11) are connected to the inner wall of the connecting pipe (1).

6. The device for sealing and fixing a drilling wellbore with a microbial mixture according to claim 2, wherein: The induction device includes an installation groove (19), a magnetically controlled conductor (18) is arranged in the installation groove (19) in cooperation with an electromagnet (5), and a return spring (20) is arranged on the side of the magnetically controlled conductor (18) away from the electromagnet (5).

7. A method for using a device for sealing a drilling wellbore with a microbial mixture according to any one of claims 1-6, characterized in that: It includes the following steps: Step 1: First, inject a certain amount of water into the shaft, then insert the pipeline into the shaft, and select a device length of a certain length to insert into the shaft according to the length of the shaft; Step 2: After the device completely enters the shaft, transmit power through the control transmission cable 6 to control the opening and closing of the electromagnet (5), so that the collection device collects the well wall materials into the device. At this time, due to the water poured in advance, under the action of the collection device, the material slurry is transported through the delivery pipe (10) into the installation block (9) for reaction; Step 3: According to the different acid-base degrees of the materials, a reaction occurs to cause the acid-base reaction sheet (23) to deform, so that the acid-base neutralization liquid leaks out, and the microbial mixed liquid is mixed to adjust the pH value, so that it contacts and penetrates the well wall for a chemical reaction; Step 4: At the same time, control the heating ring (15) to turn on according to the use requirements, and control the temperature of the microbial mixed liquid output in the paragraph to ensure the reaction environment of the microbial mixed liquid.

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