A controlled plugging device for water leakage in high-pressure fractured rock formations and its construction process

Abstract

The present invention discloses a controlled plugging device for water leakage in high-pressure fractured rock formations and a construction process thereof. The plugging device comprises: a plugging hole arranged in a corresponding plugging area; a grouting pipe inserted into the plugging hole, the outer end of which is provided with a partition plate that abuts against the plugging hole, and a plurality of grouting holes evenly distributed on the inner end sidewall; a water guide pipe sleeved at the middle of the grouting pipe, the inner end of which is detachably plugged with a water guide ring plate; a plugging assembly comprising an annular airbag mounted on the water guide ring plate, the inner holes of the annular airbag being fixedly connected to a group of plugging plates in an interval state, a group of the plugging plates being respectively provided with corresponding water-permeable holes in a staggered manner, and a group of the plugging plates being respectively provided with plugging protrusions spaced apart from the water-permeable holes; and a driving mechanism for driving the group of the plugging plates to move toward each other. The present invention can effectively ensure the plugging effect of water leakage in high-pressure fractured rock formations.

Description

Technical Field

[0001] The present invention relates to the technical field of construction for plugging water leakage in fractured rock formations, and in particular to a high-pressure fractured rock formation water leakage controlled plugging device and a construction process thereof. Background Art

[0002] The fractured rock layer is a fractured rock layer with a complex and rough fracture network formed after the reservoir is hydraulically fractured. It has good permeability and is prone to high-pressure water leakage.

[0003] Grouting is currently the primary method used to seal water seepage in fractured rock formations with high water pressure. To ensure effective sealing, current technical improvements focus on increasing the setting rate of the sealing slurry. These slurries typically utilize cement slurry combined with admixtures to ensure they reach a high strength within a short period of time, thereby achieving effective sealing. However, due to the high water pressure of the leaking water, the injected slurry is susceptible to loss under the impact of high water pressure, significantly reducing the effectiveness of the grouting.

[0004] Therefore, the purpose of this invention is to design a controlled sealing device for water leakage in fractured rock formations, which can effectively divert high-pressure water during the sealing grouting process to reduce the impact of high water pressure on the sealing slurry, and then seal the water diversion points based on the initially solidified sealing slurry, and perform sealing grouting again to ultimately ensure the sealing effect of water leakage in high-pressure fractured rock formations. Summary of the Invention

[0005] In response to the technical problems existing in the above-mentioned prior art, the present invention provides a high-water-pressure fractured rock formation leakage controlled sealing device and its construction process, which can effectively solve the technical problems existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A controlled plugging device for water leakage in high-pressure fractured rock formations, comprising:

[0008] The plugging hole is provided in the corresponding plugging area;

[0009] A grouting pipe is inserted into the plugging hole in an interval state, the outer end of the grouting pipe is provided with a partition that is closed and abuts against the plugging hole, and a plurality of grouting holes are evenly distributed on the side wall of the inner end of the grouting pipe;

[0010] A water guide pipe is sleeved on the middle part of the grouting pipe, and the inner end of the water guide pipe is detachably connected to a water guide ring plate located inside the grouting pipe;

[0011] A blocking assembly comprising an annular airbag mounted on the side of the water guide ring plate not connected to the water guide pipe, wherein the inner hole of the annular airbag is fixedly connected to a group of blocking plates in an interval state, wherein the group of blocking plates are respectively provided with corresponding water permeable holes in a staggered manner, and the group of blocking plates are respectively provided with blocking protrusions spaced apart from the water permeable holes;

[0012] Driving mechanism, after the annular airbag is inflated, the periphery is closed and abuts against the side wall of the blocking hole, and the leaked water flows along the water-permeable holes between a group of the blocking plates, and is collected by the water-guiding ring plate and then enters the water guide pipe for discharge; after the annular airbag is depressurized, the driving mechanism is used to drive a group of the blocking plates to move toward each other until the blocking protrusions respectively block the corresponding water-permeable holes.

[0013] The inner end of the water guide ring plate is folded outward to provide a support plate for fixing the annular airbag. A circle of corresponding elastic clips is fixed to the inner side of the support plate. The annular airbag is fixedly installed in the space formed by the support plate and the elastic clip. A group of the sealing plates are all located on the inner side of the elastic clip.

[0014] The inflation tube of the annular airbag is located on the inner side wall of the water guide ring plate and is detachably connected to a corresponding inflation and deflation tube. The inflation and deflation tube extends outward through the water guide tube and is connected to an external air pressure control system.

[0015] The driving mechanism adopts a plurality of groups of magnets arranged opposite to each other, and the magnets are evenly distributed and fixed on opposite sides of a group of the blocking plates.

[0016] The annular airbag is provided with corresponding air outlets on the side facing the magnet part, and corresponding air pressure valves are fixedly installed at the air outlets. When the pressure in the annular airbag is greater than the set value, the air pressure valve opens, and the high-pressure gas is discharged through the air outlet to flush and clean the surface of the corresponding magnet part.

[0017] The water guide ring plate is arranged in a bucket shape, and the outer side of the water guide ring plate abuts against the inner end of the grouting pipe.

[0018] The grouting pipe and the water guide pipe are fixedly installed on the corresponding frames through corresponding supporting oil cylinders.

[0019] The outer end of the grouting pipe is connected to an external slurry source through a corresponding slurry guide pipe and a grouting pump.

[0020] A construction process for controlled plugging of water leakage in high-pressure fractured rock formations, based on the above-mentioned plugging equipment, includes the following specific steps:

[0021] S1, inserting the water guide pipe with the water guide ring plate and the grouting pipe into the inner side of the plugging hole simultaneously;

[0022] S2, pressurizing the annular airbag so that its periphery is closed and abuts against the side wall of the blocking hole, so that the leaked water flows through the water-permeable holes between the group of blocking plates, is collected by the water guide ring plate, and then enters the water guide pipe for discharge;

[0023] S3, pouring the plugging slurry into the space formed by the grouting pipe, the plugging hole, and the partition through the grouting pipe;

[0024] S4, after the plugging slurry solidifies, the annular airbag is depressurized, and then the driving mechanism drives a group of the plugging plates to move toward each other until the plugging protrusions respectively plug the corresponding water holes;

[0025] S5, pulling the water conduit and the grouting pipe outward to the outer end of the plugging hole, and simultaneously pouring the plugging slurry during the pulling out process, so that the plugging slurry is output along the gap between the grouting pipe and the water conduit to form a fully sealed treatment for the plugging hole;

[0026] S6, after the plugging slurry solidifies, the water pipe and the grouting pipe are pulled outward from the plugging hole.

[0027] In step S4, before the annular airbag is depressurized, the pressure of the annular airbag is pre-pressurized to a value greater than a set value, so that the air pressure valve is opened to discharge the high-pressure gas through the outlet to flush and clean the surface of the corresponding magnet part, and then the annular airbag is depressurized.

[0028] Advantages of the present invention:

[0029] 1) Based on the grouting pipe, the present invention adds a water guide pipe with a water guide ring plate detachably connected to the inner end, and further provides a sealing component on the water guide ring plate, wherein the sealing component includes an annular airbag installed on the water guide ring plate, and a group of sealing plates are fixedly connected to the inner hole of the annular airbag in a spaced state, and corresponding water permeable holes are staggered on each of the sealing plates, and each of the sealing plates is provided with a sealing protrusion spaced apart from the water permeable holes.

[0030] During the blocking process, the annular airbag is inflated so that its periphery is closed and abuts against the side wall of the blocking hole, so that the leaking water flows along the water-permeable holes between a group of blocking plates, and is collected by the water-guiding annular plate and then enters the water pipe for discharge. At this time, the blocking slurry can be poured into the space formed by the grouting pipe, the blocking hole, and the partition through the grouting pipe. After this part of the blocking slurry solidifies, the annular airbag is depressurized, and then the driving mechanism drives a group of blocking plates to move toward each other until each blocking protrusion blocks are respectively blocked on the corresponding water-permeable holes to temporarily block the water guide point. Subsequently, the water pipe and the grouting pipe are pulled outward to the outer end of the blocking hole, and the blocking slurry is poured simultaneously during the withdrawal process, so that the blocking slurry is output along the gap between the grouting pipe and the water pipe to form a fully sealed treatment for the blocking hole.

[0031] In this way, it is possible to effectively divert the high-pressure water body during the plugging grouting process, so as to achieve partial injection of the plugging slurry under the premise of reducing the impact of high water pressure on the plugging slurry, and then block the water diversion point based on the plugging slurry after preliminary solidification, and perform plugging grouting again to ultimately ensure the blocking effect of water leakage in high-pressure fractured rock formations.

[0032] 2) The inner end of the water guide ring plate of the present invention is folded outward to form a support plate for securing the annular airbag. A corresponding ring of elastic clips is fixedly attached to the inner side of the support plate. The annular airbag is fixedly mounted in the space formed by the support plate and the elastic clips, and a set of blocking plates are located inside the elastic clips. This provides stable support for the annular airbag, ensuring that it can smoothly abut against the sidewall of the blocking hole after inflation, and also ensures that after the pressure is released, it will not excessively interfere with the movement of the set of blocking plates, thus ensuring the practical effect of the present invention.

[0033] 3) The driving mechanism of the present invention uses several groups of magnets arranged in opposite directions. The magnets are evenly distributed and fixed on opposite sides of a group of blocking plates. Corresponding air outlets are respectively provided on the side of the annular airbag facing the magnets. Corresponding air pressure valves are fixedly installed at the air outlets. When the pressure in the annular airbag exceeds the set value, the air pressure valve opens, and high-pressure gas is discharged through the air outlet to flush and clean the surface of the corresponding magnet. This removes dirt adhering to the opposite side of the magnet during the water diversion process, thereby ensuring that after the annular airbag is depressurized, the corresponding magnets can smoothly form an adsorption connection with each other, thereby driving the group of blocking plates to smoothly move toward each other, further effectively improving the practical effect of the present invention.

[0034] 4) During the construction process of the present invention, the loss rate of the plugging slurry is extremely low, and the overall controllability of the construction process is extremely high. The construction process of the present invention can effectively and effectively form a controllable and in-place plugging of water leakage in high-pressure fractured rock formations. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the present invention.

[0036] Figure 2 This is a schematic diagram of the assembly of the plugging component.

[0037] Figure 3 for Figure 2 A partial enlarged view of part A in .

[0038] In the accompanying drawings: sealing hole 1, grouting pipe 2, partition 201, grouting hole 202, water guide pipe 3, water guide ring plate 4, sealing assembly 5, annular airbag 501, sealing plate 502, water permeable hole 6, sealing protrusion 7, driving mechanism 8, support plate 9, elastic clip 10, inflation pipe 11, inflation and discharge pipe 12, air outlet 13, air pressure valve 1301, supporting cylinder 14, frame 15, slurry guide pipe 16, grouting pump 17. DETAILED DESCRIPTION

[0039] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments and the accompanying drawings:

[0040] Example 1

[0041] refer to Figure 1-3 , a high water pressure fractured rock formation water leakage control plugging device, comprising:

[0042] The plugging hole 1 is provided in the corresponding plugging area;

[0043] The grouting pipe 2 is inserted into the plugging hole 1 in a spaced state. The outer end of the grouting pipe 2 is provided with a partition 201 that is closed and abuts against the plugging hole 1. A plurality of grouting holes 202 are evenly distributed on the side wall of the inner end of the grouting pipe 2.

[0044] A water guide pipe 3 is sleeved on the middle part of the grouting pipe 2, and a water guide ring plate 4 located on the inner side of the grouting pipe 2 is detachably plugged into the inner end of the water guide pipe 3;

[0045] The sealing assembly 5 comprises an annular airbag 501 mounted on the side of the water guide ring plate 4 not connected to the water guide pipe 3. A group of sealing plates 502 are fixedly connected to the inner hole of the annular airbag 501 in an interval state. Each of the sealing plates 502 is provided with corresponding water holes 6 in a staggered manner. Furthermore, each of the sealing plates 502 is provided with a sealing protrusion 7 spaced apart from the water holes 6.

[0046] The driving mechanism 8 is used to drive the annular airbag 501 to move toward each other to the sealing protrusion 7 and block the corresponding water holes 6 after the annular airbag 501 is inflated and the peripheral portion is closed and abutted against the side wall of the blocking hole 1. The leaked water flows along the water-permeable holes 6 between a group of the blocking plates 502 and is collected by the water-guiding ring plate 4 before entering the water-guiding pipe 3 for discharge. After the annular airbag 501 is depressurized, the driving mechanism 8 is used to drive the group of the blocking plates 502 to move toward each other to the blocking protrusion 7 and block the corresponding water-permeable holes 6 respectively.

[0047] On the basis of the grouting pipe 2, the present invention adds a water guide pipe 3 with a water guide ring plate 4 detachably plugged into the inner end, and further provides a sealing component 5 on the water guide ring plate 4, wherein the sealing component 5 includes an annular air bag 501 installed on the water guide ring plate 4, and a group of sealing plates 502 are fixedly connected to the inner hole of the annular air bag 501 in a spaced state, and corresponding water permeable holes 6 are staggeredly provided on a group of sealing plates 502, and a group of sealing plates 502 are respectively provided with sealing protrusions 7 spaced apart from the water permeable holes 6.

[0048] During the blocking process, the annular airbag 501 is inflated so that its periphery is closed and abuts against the side wall of the blocking hole 1, so that the leaking water flows along the water-permeable holes 6 between a group of blocking plates 502, and is collected by the water-guiding annular plate 4 and then enters the water pipe 3 for discharge; at this time, the blocking slurry can be poured into the grouting pipe 2, the blocking hole 1, and the space formed by the partition 201 through the grouting pipe 2. After this part of the blocking slurry solidifies, the annular airbag 501 is depressurized, and then the driving mechanism 8 drives a group of blocking plates 502 to move toward each other until each blocking protrusion 7 is blocked on the corresponding water-permeable hole 6, so that the water guide point can be temporarily fully blocked; subsequently, the water pipe 3 and the grouting pipe 2 are pulled outward to the outer end of the blocking hole 1, and the blocking slurry is poured simultaneously during the withdrawal process, so that the blocking slurry is output along the gap between the grouting pipe 2 and the water pipe 3 to form a fully sealed treatment for the blocking hole 1.

[0049] In this way, it is possible to effectively divert the high-pressure water body during the plugging grouting process, so as to achieve partial injection of the plugging slurry under the premise of reducing the impact of high water pressure on the plugging slurry, and then block the water diversion point based on the plugging slurry after preliminary solidification, and perform plugging grouting again to ultimately ensure the blocking effect of water leakage in high-pressure fractured rock formations.

[0050] The inner end of the water guide ring plate 4 is folded outward to form a support plate 9 for securing the annular airbag 501. A corresponding circle of elastic clips 10 are fixedly attached to the inner side of the support plate 9. The annular airbag 501 is fixedly installed in the space formed by the support plate 9 and the elastic clips 10. The set of blocking plates 502 are all located inside the elastic clips. This provides stable support for the annular airbag 501, ensuring that it can smoothly abut against the sidewall of the blocking hole 1 after inflation, and ensures that after the pressure is released, it will not excessively interfere with the movement of the set of blocking plates 502, thereby ensuring the practical effect of the present invention.

[0051] The inflation tube 11 of the annular airbag 501 is located on the inner wall of the water guide ring plate 4 and is detachably connected to a corresponding inflation and deflation tube 12 . The inflation and deflation tube 12 extends outward through the water guide tube 3 and is connected to an external air pressure control system.

[0052] The driving mechanism 8 uses a plurality of groups of magnets arranged opposite to each other, and the magnets are evenly distributed and fixed on opposite sides of a group of the blocking plates 502 .

[0053] The annular airbag 501 is provided with a corresponding air outlet 13 on the side facing the magnet part, and a corresponding air pressure valve 1301 is fixedly installed at the air outlet 13. When the pressure in the annular airbag 501 is greater than the set value, the air pressure valve 1301 opens, and the high-pressure gas is discharged through the air outlet 13 to flush and clean the surface of the corresponding magnet part.

[0054] With the cooperation of the air outlet 13 and the air pressure valve 1301, the dirt adhering to the opposite side of the magnet part during the water diversion process is removed, thereby ensuring that after the annular airbag 501 is depressurized, the corresponding magnet parts can smoothly form an adsorption connection with each other, thereby driving a group of sealing plates 502 to move smoothly toward each other, so as to further effectively improve the practical effect of the present invention.

[0055] The water guide ring plate 4 is arranged in a bucket shape, and the outer side of the water guide ring plate 4 abuts against the inner end of the grouting pipe 2 .

[0056] The grouting pipe 2 and the water guide pipe 3 are fixedly mounted on the corresponding frame 15 through the corresponding supporting oil cylinder 14. The outer end of the grouting pipe 2 is connected to the external slurry source through the corresponding grouting pipe 16 and the grouting pump 17.

[0057] Example 2

[0058] A construction process for controlled plugging of water leakage in high-pressure fractured rock formations, based on the plugging equipment described in the first embodiment, includes the following specific steps:

[0059] S1, insert the water guide pipe 3 with the water guide ring plate 4 and the grouting pipe 2 into the inner side of the plugging hole simultaneously;

[0060] S2, pressurizing the annular airbag 501 so that its periphery is closed and abuts against the side wall of the blocking hole 1, and leaking water flows through the water-permeable holes 6 between the group of blocking plates 502, is collected by the water guide ring plate 4, and then enters the water guide pipe 3 for discharge;

[0061] S3, pouring the plugging slurry into the space formed by the grouting pipe 2, the plugging hole 1, and the partition 201 through the grouting pipe 2;

[0062] S4, after the plugging slurry solidifies, the pressure of the annular airbag 501 is pre-pressurized to a value greater than the set value, so that the air pressure valve 1301 is opened to discharge the high-pressure gas through the gas outlet 13 to flush and clean the surface of the corresponding magnet member. Then, the annular airbag 501 is depressurized, and the driving mechanism 8 drives a group of the blocking plates 502 to move toward each other until the blocking protrusions 7 respectively block the corresponding water permeable holes 6;

[0063] S5, the water conduit 3 and the grouting pipe 2 are pulled outward to the outer end of the plugging hole 1, and the plugging slurry is poured synchronously during the pulling out process, so that the plugging slurry is output along the gap between the grouting pipe 2 and the water conduit 3 to form a full sealing treatment for the plugging hole 1;

[0064] S6, after the plugging slurry solidifies, the water pipe 3 and the grouting pipe 2 are pulled outward from the plugging hole 1.

[0065] During the construction process of the present invention, the loss rate of the sealing slurry is extremely low, and the overall controllability of the construction process is extremely high. Through the construction process of the present invention, it is possible to effectively and effectively form a controllable and in-place sealing for water leakage in high-pressure fractured rock formations.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A controlled plugging device for water leakage in high-pressure fractured rock formations, characterized in that: include: A blocking hole (1) is provided in a corresponding blocking area; A grouting pipe (2) is inserted into the blocking hole (1) in a spaced state, the outer end of the grouting pipe (2) is provided with a partition (201) that is closed and abuts against the blocking hole (1), and a plurality of grouting holes (202) are evenly distributed on the side wall of the inner end of the grouting pipe (2); A water guide pipe (3) is sleeved on the middle part of the grouting pipe (2), and the inner end of the water guide pipe (3) is detachably connected to a water guide ring plate (4) located on the inner side of the grouting pipe (2); A blocking assembly (5) comprising an annular airbag (501) mounted on the side of the water guide ring plate (4) not connected to the water guide pipe (3), a group of blocking plates (502) being fixedly connected to the inner hole of the annular airbag (501) in an interval state, a group of the blocking plates (502) being staggeredly provided with corresponding water-permeable holes (6), and a group of the blocking plates (502) being provided with blocking protrusions (7) spaced apart from the water-permeable holes (6); The driving mechanism (8) is used to drive the annular airbag (501) to move toward each other until the outer periphery is closed and abuts against the side wall of the blocking hole (1). The leaked water flows along the water-permeable holes (6) between a group of the blocking plates (502), is collected by the water-guiding annular plate (4), and then enters the water-guiding pipe (3) for external discharge. After the annular airbag (501) is depressurized, the driving mechanism (8) is used to drive the group of the blocking plates (502) to move toward each other until the blocking protrusions (7) are blocked on the corresponding water-permeable holes (6). The inner end of the water guide ring plate (4) is folded outward to provide a support plate (9) for fixing the annular airbag (501), the inner side of the support plate (9) is fixedly connected to a circle of corresponding elastic clamping plates (10), the annular airbag (501) is fixedly installed in the space formed by the support plate (9) and the elastic clamping plate (10), and a group of the blocking plates (502) are all located on the inner side of the elastic clamping plate (10); The driving mechanism (8) uses a plurality of groups of magnets arranged opposite to each other, and the magnets are evenly distributed and fixed on opposite sides of a group of the blocking plates (502); The annular airbag (501) is provided with a corresponding air outlet (13) on one side facing the magnet part, and a corresponding air pressure valve (1301) is fixedly installed at the air outlet (13). When the pressure in the annular airbag (501) is greater than a set value, the air pressure valve (1301) opens, and high-pressure gas is discharged through the air outlet (13) to flush and clean the surface of the corresponding magnet part.

2. The device for controlling water leakage in high-pressure fractured rock formations according to claim 1 is characterized in that: The inflation tube (11) of the annular airbag (501) is located on the inner side wall of the water guide ring plate (4) and is detachably connected to a corresponding inflation and deflation tube (12). The inflation and deflation tube (12) extends outward through the water guide tube (3) and is connected to an external air pressure control system.

3. The device for controlling water leakage in high-pressure fractured rock formations according to claim 1, characterized in that: The water guide ring plate (4) is arranged in a bucket shape, and the outer side of the water guide ring plate (4) abuts against the inner end of the grouting pipe (2).

4. The device for controlling water leakage in high-pressure fractured rock formations according to claim 1, characterized in that: The grouting pipe (2) and the water guide pipe (3) are fixedly mounted on the corresponding machine frame (15) via corresponding supporting oil cylinders (14).

5. The controlled plugging device for water leakage in high-pressure fractured rock formations according to claim 1, characterized in that: The outer end of the grouting pipe (2) is connected to an external slurry source via a corresponding slurry guide pipe (16) and a grouting pump (17).

6. A construction process for controlled plugging of water leakage in high-pressure fractured rock formations, based on the plugging equipment according to any one of claims 1 to 5, characterized in that: The following specific steps are included: S1, synchronously inserting the water guide pipe (3) connected with the water guide ring plate (4) and the grouting pipe (2) into the inner side of the plugging hole; S2, pressurizing the annular airbag (501) so that its periphery is closed and abuts against the side wall of the blocking hole (1), and the leaked water flows along the water-permeable holes (6) between a group of blocking plates (502), is collected by the water guide ring plate (4), and then enters the water guide pipe (3) for external discharge; S3, pouring the plugging slurry into the space formed by the grouting pipe (2), the plugging hole (1), and the partition (201) through the grouting pipe (2); S4, after the blocking slurry solidifies, the annular airbag (501) is depressurized, and then the driving mechanism (8) drives a group of blocking plates (502) to move toward each other until the blocking protrusions (7) respectively block the corresponding water holes (6); S5, the water guide pipe (3) and the grouting pipe (2) are pulled outward to the outer end of the plugging hole (1), and the plugging slurry is poured synchronously during the pulling out process, so that the plugging slurry is output along the gap between the grouting pipe (2) and the water guide pipe (3) to form a fully sealed treatment for the plugging hole (1); S6, after the plugging slurry solidifies, the water guide pipe (3) and the grouting pipe (2) are pulled outward from the plugging hole (1).

7. A construction process for controlled plugging of water leakage in high-pressure fractured rock formations according to claim 6, characterized in that: In step S4, before the annular airbag (501) is depressurized, the pressure of the annular airbag (501) is pre-pressurized to a value greater than a set value, so that the air pressure valve (1301) is opened to discharge the high-pressure gas through the gas outlet (13) to flush and clean the surface of the corresponding magnet part, and then the annular airbag (501) is depressurized.

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