A targeted drilling plugging device and a plugging method

Abstract

The application discloses a kind of targeted drilling plugging device and plugging method, it is related to engineering survey technical field, the device includes: material pipe, it is used to be connected with lower component;Material filling bag is arranged in material pipe, material filling bag bag mouth is downward and sealed, and material filling bag is filled with plugging agent;Connecting piece, one end is connected with the bottom end of material pipe;Counterweight, upper end is connected with the other end of connecting piece;Control, it is connected with bag mouth, for opening bag mouth.Utilize lower component and lower plugging device into drilling, make counterweight upper end lower than the lowermost end of drilling loss section, material pipe is higher than the uppermost end of drilling loss section;Utilize control and open the bag mouth of material filling bag, make plugging agent enter drilling loss section, after setting time, complete plugging.Solve the prior art in the face of some crack, solution, etc., when loss is faster, and loss intensity is higher, it is difficult to realize economic, fast, effective plugging problem.

Description

Technical Field

[0001] This invention relates to the field of engineering surveying technology, specifically to a targeted drilling and plugging device and method. Background Technology

[0002] In the field of engineering exploration technology, drilling is an essential process. During geological exploration drilling, especially during borehole formation, the complex and diverse underground environment, including pre-existing cracks, pores, or cavities in the strata, can disrupt the integrity of the original formation due to the dynamic destructive effects of drilling. This can lead to drilling fluid leakage, causing an imbalance in borehole pressure and hindering effective drilling fluid circulation, which can adversely affect normal construction and even result in serious borehole accidents.

[0003] In existing technologies, borehole sealing generally employs methods such as water pump injection, tubular injection, or injection device injection. However, when dealing with strata that are prone to rapid water loss and high leakage intensity, such as fractured or karst formations, it is difficult to achieve economical, rapid, and effective sealing. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a targeted drilling and plugging device and method, which can solve the problem that it is difficult to achieve economical, fast and effective plugging when facing some fractured, karst, or other strata with rapid water loss and high leakage intensity.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] On the one hand, this solution provides a targeted borehole plugging device, comprising:

[0007] Material tube, used to connect to the lowering assembly;

[0008] A material filling bag is disposed inside the material tube, with the bag opening facing downwards and sealed, and the material filling bag is filled with a leak-sealing agent;

[0009] A connector, one end of which is connected to the bottom end of the material pipe;

[0010] A counterweight, the upper end of which is connected to the other end of the connector;

[0011] A control element, which is connected to the bag opening, is used to open the bag opening.

[0012] In some alternative solutions, the upper part of the material tube is provided with a spring mechanism connected to the material filling bag. The spring mechanism is connected to the control component. When the bag opening is opened, the spring mechanism can be activated simultaneously to drive the material filling bag to rotate.

[0013] In some alternative embodiments, the spring mechanism includes:

[0014] A spring box is disposed on the upper part of the material tube, and a limit groove is provided on the top of the spring box;

[0015] A spring, which is disposed within the mainspring barrel;

[0016] A rotating rod, the side wall of which is connected to the spring, passes through the upper and lower parts of the mainspring barrel and can rotate inside the mainspring barrel, and a locking block is provided at the end of the rotating rod that extends out of the upper part of the mainspring barrel;

[0017] A limiting cover is provided on the outside of the locking block and is locked in the limiting groove. The limiting cover is connected to the control component.

[0018] A connecting rod is disposed at the lower end of the rotating rod and is connected to the material filling bag.

[0019] In some alternative embodiments, the counterweight includes a gap-filling assembly and a counterweight block disposed at the lower end of the gap-filling assembly, the gap-filling assembly being used to fill the gap between the counterweight and the drilled hole.

[0020] In some alternative embodiments, the sealant assembly includes:

[0021] A joint sealant tube, wherein the joint sealant tube is filled with aggregate;

[0022] An elastic partition, which is folded and placed at the bottom of the sealant tube and connected to the control component, when the elastic partition is pulled out of the sealant tube, brings out the aggregate inside the sealant tube, and unfolds after being pulled out and is locked in the borehole.

[0023] In some alternative solutions, the elastic partition includes a circular base plate and a plurality of spring pieces spaced apart in the circumferential direction of the circular base plate. When the elastic partition is disposed inside the sealant tube, the spring pieces bend toward the bottom of the sealant tube and unfold when the sealant tube is pulled out, thus locking into the drilled hole.

[0024] In some alternative solutions, the control element is a rope for connecting to the spring mechanism, the bag opening, and the elastic partition.

[0025] In some alternative designs, the counterweight is provided with an umbrella-shaped blocking mechanism at its bottom, and the extension switch of the umbrella-shaped blocking mechanism is connected to the control component.

[0026] On the other hand, this solution provides a borehole sealing method, which is implemented using the aforementioned targeted borehole sealing device, including:

[0027] The targeted drilling and plugging device is lowered into the borehole using the lowering component, so that the upper end of the counterweight is lower than the lowest end of the borehole leakage section and the material pipe is higher than the highest end of the borehole leakage section.

[0028] The opening of the material filling bag is opened using the control device, allowing the sealing agent in the material filling bag to enter the leakage section of the borehole. After standing for a set time, the leak is sealed.

[0029] In some alternative solutions, while the bag opening is being opened using the control components, the opening mechanism is simultaneously activated using the control components to rotate the material filling bag and pull the elastic partition out of the sealant tube.

[0030] Compared with existing technologies, the advantages of this invention are as follows: This solution utilizes a lowering component to lower the targeted drilling and plugging device into the borehole, ensuring that the upper end of the counterweight is below the lowest point of the borehole leakage section, and the material pipe is above the highest point of the leakage section. During the lowering process, the material pipe provides protection for the material filling bag. The opening of the material filling bag is opened using a control component, allowing the plugging agent inside to enter the borehole leakage section. After a set set time, the plugging is completed. This solves the problem in existing technologies where it is difficult to achieve economical, rapid, and effective plugging when facing formations with rapid water loss and high leakage intensity, such as fractured or cavernous formations. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the targeted drilling and plugging device in the soil layer in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the targeted drilling and plugging device in an embodiment of the present invention;

[0034] Figure 3 As described in the embodiments of the present invention Figure 1 Schematic diagram of the structure at point A;

[0035] Figure 4 This is a schematic diagram of the elevation structure of the spring mechanism in an embodiment of the present invention;

[0036] Figure 5 This is a top view of the spring mechanism in an embodiment of the present invention;

[0037] Figure 6 As described in the embodiments of the present invention Figure 1 Schematic diagram of the structure at point B;

[0038] Figure 7 As described in the embodiments of the present invention Figure 1 Schematic diagram of the structure at point C;

[0039] Figure 8 This is a schematic diagram of the elastic partition after it has been unfolded in an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the elastic partition after folding in an embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of the counterweight and umbrella-shaped barrier mechanism in an embodiment of the present invention;

[0042] Figure 11 This is a schematic diagram of the umbrella-shaped barrier mechanism after it has been retracted in an embodiment of the present invention;

[0043] Figure 12 This is a schematic diagram of the umbrella-shaped barrier mechanism after it has been deployed in an embodiment of the present invention;

[0044] Figure 13 This is a schematic flowchart of the drilling and plugging method in an embodiment of the present invention;

[0045] In the diagram: 1. Lowering component; 2. Material pipe; 3. Material filling bag; 4. Connector; 5. Counterweight; 51. Sealing component; 511. Aggregate; 512. Elastic partition; 52. Counterweight block; 6. Control component; 7. Spring mechanism; 71. Spring box; 72. Spring; 73. Rotary rod; 731. Locking block; 74. Limit cover; 75. Connecting rod; 8. Umbrella-shaped blocking mechanism; 9. Drilling leakage section. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] like Figure 1 , Figure 2 and Figure 6 As shown, the present invention provides a targeted borehole sealing device, comprising:

[0049] Material pipe 2, which is used to connect to the lowering assembly 1;

[0050] A material filling bag 3 is disposed inside the material pipe 2. The opening of the material filling bag 3 is facing downward and sealed. The material filling bag 3 is filled with a leak-sealing agent.

[0051] Connector 4, one end of which is connected to the bottom end of the material pipe 2;

[0052] The upper end of the counterweight 5 is connected to the other end of the connector 4;

[0053] Control component 6, which is connected to the bag opening, is used to open the bag opening.

[0054] In this embodiment, the present invention utilizes the lowering component 1 to lower the targeted borehole plugging device into the borehole, ensuring that the upper end of the counterweight 5 is lower than the lowest end of the borehole leakage section 9, and the material pipe 2 is higher than the highest end of the borehole leakage section 9. During the lowering process, the material pipe 2 provides protection for the material filling bag 3. The control component 6 opens the opening of the material filling bag 3, allowing the plugging agent in the material filling bag 3 to enter the borehole leakage section 9. After a set set time, the plugging is completed. This solves the problem in the prior art where it is difficult to achieve economical, rapid, and effective plugging when facing formations with rapid water loss and high leakage intensity, such as fractured or cavernous formations.

[0055] like Figure 3 As shown, in some optional embodiments, the upper part of the material tube 2 is provided with a spring mechanism 7 connected to the material filling bag 3. The spring mechanism 7 is connected to the control component 6. When the bag opening is opened, the spring mechanism 7 can be opened at the same time to drive the material filling bag 3 to rotate.

[0056] In this embodiment, by setting a spring mechanism 7, when the bag opening is opened using the control component 6, the spring mechanism 7 is simultaneously activated, causing the material filling bag 3 to rotate. This facilitates the smooth entry of the sealing agent in the material filling bag 3 into the drilling leakage section 9.

[0057] like Figure 4 and Figure 5 As shown, in some optional embodiments, the spring mechanism 7 includes:

[0058] A spring box 71 is disposed on the upper part of the material tube 2, and a limit groove is provided on the top of the spring box 71;

[0059] Spring 72 is disposed inside the spring box 71;

[0060] The rotating rod 73 has its side wall connected to the spring 72. The rotating rod 73 passes through the upper and lower parts of the mainspring box 71 and can rotate inside the mainspring box 71. A locking block 731 is provided at the end of the rotating rod 73 that extends out of the upper part of the mainspring box 71.

[0061] A limiting cover 74 is provided on the outside of the locking block 731 and is locked in the limiting groove. The limiting cover 74 is connected to the control component 6.

[0062] A connecting rod 75 is disposed at the lower end of the rotating rod 73 and is connected to the material filling bag 3.

[0063] In this embodiment, the rotating rod 73 is rotated using the locking block 731, which drives the spring 72 to generate elastic potential energy. This elastic potential energy can be locked by the limiting cover 74 and the limiting groove provided on the top of the spring box 71. The limiting cover 74 is provided with a pull ring, which is connected to the control component 6. When the control component 6 is used, the limiting cover 74 is pulled out of the limiting groove, releasing the elastic potential energy of the spring 72, which drives the material filling bag 3 to rotate via the connecting rod 75. This facilitates the smooth entry of the sealing agent in the material filling bag 3 into the drilling leakage section 9.

[0064] like Figure 2 As shown, in some optional embodiments, the counterweight 5 includes a gap-filling component 51 and a counterweight block 52 disposed at the lower end of the gap-filling component 51, wherein the gap-filling component 51 is used to fill the gap between the counterweight 5 and the drilled hole.

[0065] In this embodiment, by setting a counterweight 52, the targeted drilling and plugging device can be smoothly lowered into the borehole. The size of the counterweight 52 is adapted to the diameter of the borehole, and its mass is determined according to the mud concentration in the borehole. By setting a gap-filling component 51, the gap between the counterweight 5 and the borehole is filled to prevent the plugging fluid from flowing below the borehole leakage section 9.

[0066] like Figure 7 As shown, in some optional embodiments, the sealant assembly 51 includes:

[0067] A joint sealant tube, wherein the joint sealant tube is filled with aggregate 511;

[0068] The elastic partition 512, after being folded, is set at the bottom of the sealant tube and connected to the control component 6. When the elastic partition 512 is pulled out from the sealant tube, it brings out the aggregate 511 inside the sealant tube, and unfolds after being pulled out and is locked in the drill hole.

[0069] In this embodiment, the aggregate 511 includes granular and fibrous materials such as sawdust, nutshells, pulp, and crushed mica flakes. The aggregate 511 fills the gap between the counterweight 5 and the borehole, and also mixes with the sealing agent to jointly seal the leak. When the elastic baffle 512 is pulled out of the sealant tube, it carries out the aggregate 511 from the sealant tube, and after being pulled out, it unfolds and locks itself inside the borehole to prevent the sealing fluid from flowing below the leak section 9 of the borehole.

[0070] like Figure 8 and Figure 9As shown, in some optional embodiments, the elastic partition 512 includes a circular base plate and a plurality of spring pieces spaced apart in the circumferential direction of the circular base plate. When the elastic partition 512 is disposed inside the sealant tube, the spring pieces bend toward the bottom of the sealant tube and unfold when the sealant tube is pulled out, and are locked in the drill hole.

[0071] like Figure 10 , Figure 11 and Figure 12 As shown, in some optional embodiments, the counterweight 5 is provided with an umbrella-shaped blocking mechanism 8 at its bottom, and the extension switch of the umbrella-shaped blocking mechanism 8 is connected to the control component 6.

[0072] In this embodiment, the umbrella-shaped baffle mechanism 8 is initially in a retracted state. When the control element 6 is activated, the extension switch of the umbrella-shaped baffle mechanism 8 is opened, causing the umbrella-shaped baffle mechanism 8 to switch to an extended state, preventing the plugging fluid from flowing below the borehole leakage section 9. Both the umbrella-shaped baffle mechanism 8 and the elastic baffle 512 serve to prevent the plugging fluid from flowing below the borehole leakage section 9; one of the two can be selected.

[0073] In some alternative embodiments, the control element 6 is a rope for connection with the spring mechanism 7, the bag opening, and the elastic partition 512.

[0074] In this embodiment, a rope is used as the control element 6. After being connected to the spring mechanism 7, the bag opening, the elastic partition 512 and the extension switch, when in use, pulling the rope will activate the various switch components of the rope necklace.

[0075] like Figure 13 As shown, on the other hand, the present invention provides a borehole sealing method, which is implemented using the above-mentioned targeted borehole sealing device, including:

[0076] S1: Use the lowering component 1 to lower the targeted drilling and plugging device into the borehole, so that the upper end of the counterweight 5 is lower than the lowest end of the borehole leakage section 9, and the material pipe 2 is higher than the highest end of the borehole leakage section 9.

[0077] S2: Use the control unit 6 to open the bag opening of the material filling bag 3, so that the sealing agent in the material filling bag 3 enters the drilling leakage section 9. After standing for a set time, the sealing is completed.

[0078] In this embodiment, the set time is determined based on the composition of the selected sealant.

[0079] In some alternative embodiments, when the bag opening is opened using the control member 6, the opening mechanism 7 is simultaneously activated using the control member 6, causing the material filling bag 3 to rotate and the elastic partition 512 to be pulled out from the sealant tube.

[0080] In some alternative embodiments, the length of the connector 4 is determined based on the depth of the borehole leakage section 9; the slurry volume is determined based on the borehole leakage range to determine the length of the material pipe 2; and the required counterweight of the counterweight 5 is determined based on the borehole mud concentration.

[0081] In this embodiment, the depth of leakage in the geological borehole is determined based on the core fragmentation section of the formation and the drilling slurry leakage during the drilling process.

[0082] In this embodiment, the material pipe 2 is made of PVC, with a length between 50 and 200 cm and an outer diameter 2 to 6 cm smaller than the borehole diameter. The specific dimensions of the material pipe 2 are determined based on the severity of the actual leakage and the quality of the borehole's inner wall. The limiting cover 74 is a regular hexagonal bolt cap, made of plastic but not limited to plastic. The sealing agent in the material filling bag 3 includes water glass and cement slurry. The cement used in the cement slurry is No. 400 or No. 500 cement, with a water-cement ratio between 0.5 and 1. The water glass is an aqueous solution of sodium silicate with a concentration between 35 and 45 Baume degrees. When the sealing agent requires a shorter setting time, up to 15% by weight of quick-setting lime is added to the cement as an accelerator. When the sealing agent requires a longer setting time, up to 1% by weight of disodium hydrogen phosphate is added to the cement as a retarder.

[0083] In summary, this invention utilizes a lowering component to lower a targeted borehole plugging device into the borehole, ensuring that the upper end of the counterweight is below the lowest point of the borehole's leakage section and the material pipe is above the highest point of the leakage section. During the lowering process, the material pipe protects the material filling bag. A control component opens the opening of the material filling bag, allowing the plugging agent inside to enter the borehole's leakage section. After a set set time, the plugging is complete. This invention solves the problem in existing technologies where it is difficult to achieve economical, rapid, and effective plugging when facing formations with rapid water loss and high leakage intensity, such as fractured or cavernous formations.

[0084] The targeted drilling and plugging device provided by this invention is simple in structure, easy to operate, and low in cost, featuring rapid and targeted plugging. The device has a modular structure, making assembly convenient; it uses rope lowering, eliminating the need for drill rods, resulting in high efficiency; the materials used in the device have no adverse effects on the borehole, ensuring safety and reliability. It is suitable for geological drilling in severely leaky strata such as bedrock fissures, karst, and gravelly soil. Due to its targeted plugging characteristics, it prevents the plugging agent from being diluted by groundwater when entering pores, fissures, or karst caves, thus avoiding plugging failure. Furthermore, it eliminates the need for drill rods and piston-type injection devices, preventing the serious accident of the plugging agent solidifying within the targeted drilling and plugging device.

[0085] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0086] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0087] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A targeted drilling and plugging device, characterized in that, include: Material pipe (2), which is used to connect to the lowering assembly (1); Material filling bag (3) is placed inside the material tube (2), the opening of the material filling bag (3) is facing down and sealed, and the material filling bag (3) is filled with a leak-sealing agent; The connector (4) is connected at one end to the bottom end of the material pipe (2); The upper end of the counterweight (5) is connected to the other end of the connector (4); Control element (6), which is connected to the bag opening, for opening the bag opening; The upper part of the material tube (2) is provided with a spring mechanism (7) connected to the material filling bag (3). The spring mechanism (7) is connected to the control component (6). When the bag opening is opened, the spring mechanism (7) can be opened at the same time to drive the material filling bag (3) to rotate. The spring mechanism (7) includes: A spring box (71) is provided on the upper part of the material tube (2), and a limit groove is provided on the top of the spring box (71); A spring (72) is disposed inside the spring box (71); The rotating rod (73) has its side wall connected to the spring (72). The rotating rod (73) passes through the upper and lower parts of the spring box (71) and can rotate inside the spring box (71). The end of the rotating rod (73) extending out of the upper part of the spring box (71) is provided with a locking block (731). A limiting cover (74) is provided on the outside of the card block (731) and is locked in the limiting groove. The limiting cover (74) is connected to the control component (6). A connecting rod (75) is disposed at the lower end of the rotating rod (73) and connected to the material filling bag (3).

2. The targeted drilling and plugging device as described in claim 1, characterized in that, The counterweight (5) includes a gap-filling component (51) and a counterweight block (52) located at the lower end of the gap-filling component (51). The gap-filling component (51) is used to fill the gap between the counterweight (5) and the drill hole.

3. The targeted drilling and plugging device as described in claim 2, characterized in that, The sealant assembly (51) includes: A joint filler tube, wherein the joint filler tube is filled with aggregate (511); The elastic partition (512) is folded and placed at the bottom of the sealant tube and connected to the control element (6). When the elastic partition (512) is pulled out from the sealant tube, it brings out the aggregate (511) inside the sealant tube and unfolds after being pulled out, and is stuck in the borehole.

4. The targeted drilling and plugging device as described in claim 3, characterized in that, The elastic partition (512) includes a circular base plate and a plurality of spring pieces spaced apart in the circumferential direction of the circular base plate. When the elastic partition (512) is placed inside the sealant tube, the spring pieces bend toward the bottom of the sealant tube. When the sealant tube is pulled out, the spring pieces unfold and are locked in the drill hole.

5. The targeted drilling and plugging device as described in claim 4, characterized in that, The control element (6) is a rope used to connect to the spring mechanism (7), the bag opening, and the elastic partition (512).

6. The targeted drilling and plugging device as described in claim 1, characterized in that, The counterweight (5) is provided with an umbrella-shaped blocking mechanism (8) at its bottom, and the extension switch of the umbrella-shaped blocking mechanism (8) is connected to the control component (6).

7. A method for sealing leaks through drilling, characterized in that, It is implemented using the targeted drilling and plugging device as described in claim 1, comprising: Using the lowering component (1), the targeted drilling and plugging device is lowered into the borehole, so that the upper end of the counterweight (5) is lower than the lowest end of the borehole leakage section (9), and the material pipe (2) is higher than the highest end of the borehole leakage section (9). Use the control unit (6) to open the bag opening of the material filling bag (3), so that the sealing agent in the material filling bag (3) enters the drilling leakage section (9), and after standing for a set time, the sealing is completed.

8. The drilling and plugging method as described in claim 7, characterized in that, When the bag opening is opened using the control element (6), the opening strip mechanism (7) is opened using the control element (6) at the same time, so that the material filling bag (3) rotates and the elastic partition (512) is pulled out from the sealant tube.

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