Three-blocking and two-injecting hole sealing device

Abstract

The utility model provides a three-plugging two-injection hole sealing device, which relates to the technical field of mine drill hole plugging, and comprises a sleeve, a reaming section, a first sealing bag and a third sealing bag, the sleeve is positioned in the reaming section, the first sealing bag surrounds the outer side of the head end section of the sleeve, the third sealing bag surrounds the outer side of the tail end section of the sleeve, and the first sealing bag and the third sealing bag are arranged in the reaming section. Outer groove rings are fixed to the head end and the middle of the sleeve, a side cover ring is arranged on the portion, on one side of the outer groove rings, of the sleeve in a sliding mode, side connecting sliding columns are fixed to the two sides of the side cover ring, supporting springs are fixed to the two sides of the side cover ring, and the first sealing bag one-way valve communicates with a first bag grouting pipe; and the middle section one-way valve of the first bag grouting pipe is communicated with a second sealing bag. The three-plugging two-injection under-pressure hole sealing solves the problems that gas extraction drill hole sealing is not tight and gas leakage is prone to occurring, and solves the problems that according to a conventional drill hole sealing technology, gas tightness is poor, gas leakage is obvious, and the requirement for tight hole sealing of various drill holes cannot be met.

Description

Technical Field

[0001] The utility model relates to the technical field of mine borehole plugging, in particular to a three-plugging and two-injection hole plugging device. Background Art

[0002] In order to ensure the safe production of mines and the safety of miners' lives, coal mines will conduct gas concentration, gas pressure and water hazard prevention tests through gas extraction drilling, pressure measurement drilling and water exploration drilling.

[0003] After the construction of gas extraction drilling, pressure measuring drilling and water exploration drilling in coal mines is completed, cracks develop near the hole mouth due to the cracks in the tunnel pressure relief belt and the drilling pressure relief ring. Conventional drilling sealing technology is used, but the air tightness is poor and the air leakage is obvious, which cannot guarantee the strict sealing requirements of various boreholes. In order to improve this situation, the three-blocking and two-injection pressure sealing device is studied to solve the requirements of high-quality sealing of different types of boreholes in coal mines. Summary of the invention

[0004] The disclosed embodiment relates to a three-blocking and two-injection sealing device, in which a first sealing bag, a second sealing bag, a third sealing bag, an inner grouting area and an outer grouting area constitute a three-blocking and two-injection pressure sealing device to solve the problems of loose sealing and easy leakage of gas extraction drilling holes. At the same time, the sealing method also meets the sealing requirements that the pressure resistance test pressure of the water-stop casing in the water exploration and drainage drilling hole is not less than 2.0MPa, there is no leakage in the drilling hole and the surrounding area, and the casing is not loose or ejected, and the stabilization time is more than 30 minutes.

[0005] According to a first aspect of the present disclosure, a three-plugging and two-injection sealing device is provided, which specifically includes: a sleeve, a hole expansion section, a first sealing bag and a third sealing bag, wherein the sleeve is located inside the hole expansion section, the first sealing bag surrounds the outside of the head end section of the sleeve, the third sealing bag surrounds the outside of the tail end section of the sleeve, an outer groove ring is fixed to the head end and the middle part of the sleeve, a side cover ring is slid on one side of the outer groove ring of the sleeve, side connecting sliding columns are fixed to both sides of the side cover ring, and support springs are fixed to both sides of the side cover ring.

[0006] In at least some embodiments, the side connecting slide column and the outer protrusion of the sleeve are penetrated through the sliding connection, the tail end of the support spring and the outer protrusion of the sleeve are fixedly connected, the support spring supports the side cover ring to move close to the outer groove ring, the support spring supports the side cover ring to squeeze the first sealing bag and the second sealing bag to remain in the groove of the outer groove ring, and the outer groove ring protects the first sealing bag and the second sealing bag.

[0007] In at least some embodiments, the first sealed bag one-way valve is connected to the first bag grouting pipe, the middle section one-way valve of the first bag grouting pipe is connected to the second sealed bag, and the middle section of the first bag grouting pipe is provided with a bursting valve.

[0008] In at least some embodiments, the bursting valve is located between the first sealing bag and the second sealing bag, the first sealing bag is located between the outer groove ring and the side cover ring at the head end of the casing, the second sealing bag is located between the outer groove ring and the side cover ring in the middle of the casing, the first sealing bag and the second sealing bag are located in the groove of the outer groove ring, the supporting spring supports the side cover ring to squeeze the first sealing bag and the second sealing bag and keep them in the groove of the outer groove ring, the outer groove ring protects the first sealing bag and the second sealing bag to avoid wear between the first sealing bag, the second sealing bag and the inner wall of the expansion section during installation.

[0009] In at least some embodiments, the head end of the expansion section is connected to the main hole section, the interval between the first sealing bag and the second sealing bag inside the expansion section is the inner section grouting area, the interval between the second sealing bag and the third sealing bag inside the expansion section is the outer section grouting area, and the inner section grouting area between the first sealing bag and the second sealing bag forms an enclosed space.

[0010] In at least some embodiments, the third sealed bag one-way valve is connected to the second bag grouting pipe, the upper part of the third sealed bag is penetrated by a hole section of a pressurized return grouting pipe, and the middle part of the third sealed bag is penetrated by a hole section of a pressurized grouting pipe.

[0011] In at least some embodiments, the pressurized grouting pipe of the orifice section is connected to the grouting area of ​​the outer section, the pressurized return grouting pipe of the orifice section is connected to the upper part of the grouting area of ​​the outer section, the grouting pipe of the third sealed bag and the first bag are connected through, and the outer section grouting area between the third sealed bag and the second sealed bag forms an enclosed space.

[0012] The utility model provides a three-blocking and two-injection sealing device, which has the following beneficial effects:

[0013] When the first sealing bag and the second sealing bag are not expanded, they are in the groove of the outer groove ring. The protection of the outer groove ring prevents the first sealing bag and the second sealing bag from contacting with the inner wall of the expansion section during installation, thereby preventing the first sealing bag and the second sealing bag from being worn and damaged inside the expansion section.

[0014] The first sealing bag, the second sealing bag, the third sealing bag, the inner grouting area and the outer grouting area constitute a three-block and two-injection pressure-sealed hole to solve the problems of loose sealing and easy leakage of gas extraction drilling holes. At the same time, this sealing method also meets the sealing requirements that the pressure test pressure of the water-stop casing in the exploration and drainage drilling hole is not less than 2.0MPa, there is no leakage in the drilling hole and the surrounding area, and the casing is not loose or ejected, and the stabilization time is more than 30 minutes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0016] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0017] In the attached picture:

[0018] Figure 1 A schematic diagram showing the overall structure of the present application;

[0019] Figure 2 A schematic diagram of the sleeve structure of the present application is shown;

[0020] Figure 3 A schematic diagram showing the outer groove ring structure of the present application is shown;

[0021] Figure 4 A schematic structural diagram of a first sealed pouch of the present application is shown;

[0022] Figure 5 A schematic structural diagram of a third sealed pouch of the present application is shown;

[0023] Figure 6 A schematic diagram showing the structure of the split state of the present application;

[0024] Reference numerals list

[0025] 1. Casing; 101. External groove ring; 102. Side cover ring; 103. Side connecting sliding column; 104. Support spring;

[0026] 2. Hole expansion section; 201. Main hole section; 202. Inner section grouting area; 203. Outer section grouting area;

[0027] 3. First sealed bag; 301. First bag grouting pipe; 302. Second sealed bag; 303. Burst valve;

[0028] 4. The third sealing bag; 401. The second bag grouting pipe; 402. The orifice section pressurized grouting pipe; 403. The orifice section pressurized return grouting pipe. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Example 1: Please refer to Figures 1 to 6 :

[0031] The utility model proposes a three-blocking and two-injection sealing device, comprising: a casing 1, a hole expansion section 2, a first sealing bag 3 and a third sealing bag 4, the casing 1 is fixed with an outer groove ring 101 at the head end and the middle part, the casing 1 is slidably provided with a side cover ring 102 on one side of the outer groove ring 101, the side cover ring 102 is fixed with a side connection slide column 103 on both sides, the side cover ring 102 is fixed with a support spring 104 on both sides, the side connection slide column 103 and the outer side protrusion of the casing 1 are penetrated and slidably connected, the tail end of the support spring 104 is fixedly connected with the outer side protrusion of the casing 1, the support spring 104 supports the side cover ring 102 to move close to the outer groove ring 101, and the support spring 104 supports the side cover ring 102 to squeeze the first sealing bag 3 and the second sealing bag 302. The casing 1 is kept in the groove of the outer groove ring 101, and the outer groove ring 101 protects the first sealing bag 3 and the second sealing bag 302. The casing 1 is inside the expansion section 2, and the first sealing bag 3 is surrounded on the outside of the head end section of the casing 1. The one-way valve of the first sealing bag 3 is connected to the first bag grouting pipe 301, and the middle section of the first bag grouting pipe 301 is connected to the second sealing bag 302. The middle section of the first bag grouting pipe 301 is provided with a bursting valve 303, and the third sealing bag 4 is surrounded on the outside of the tail end section of the casing 1. The one-way valve of the third sealing bag 4 is connected to the second bag grouting pipe 401, and the upper part of the third sealing bag 4 is penetrated by the orifice section pressurized return grouting pipe 403, and the middle part of the third sealing bag 4 is penetrated by the orifice section pressurized grouting pipe 402.

[0032] In the disclosed embodiment, the bursting valve 303 is located between the first sealing bag 3 and the second sealing bag 302, the first sealing bag 3 is located between the outer groove ring 101 and the side cover ring 102 at the head end of the casing 1, and the second sealing bag 302 is located between the outer groove ring 101 and the side cover ring 102 in the middle of the casing 1, the first sealing bag 3 and the second sealing bag 302 are located in the groove of the outer groove ring 101, the support spring 104 supports the side cover ring 102 to squeeze the first sealing bag 3 and the second sealing bag 302 to remain in the groove of the outer groove ring 101, the outer groove ring 101 protects the first sealing bag 3 and the second sealing bag 302, and in the process of the casing 1 penetrating into the reaming section 2, the outer groove ring 101 and the inner wall of the reaming section 2 are in sliding contact, thereby avoiding wear of the first sealing bag 3, the second sealing bag 302 and the inner wall of the reaming section 2 during installation.

[0033] In the disclosed embodiment, the head end of the expansion section 2 is connected to the main hole section 201, the interval between the first sealing bag 3 and the second sealing bag 302 inside the expansion section 2 is the inner section grouting area 202, and the interval between the second sealing bag 302 and the third sealing bag 4 inside the expansion section 2 is the outer section grouting area 203. The inner section grouting area 202 between the first sealing bag 3 and the second sealing bag 302 forms a closed space. After the first sealing bag 3 and the second sealing bag 302 are filled, the first bag grouting pipe 301 continues to grout until the bursting valve 303 is opened, and the inner section grouting area 202 starts grouting. After the inner section grouting area 202 reaches the grouting pressure, grouting stops to form the first pressurized plugging area.

[0034] In the disclosed embodiment, the orifice section pressurized grouting pipe 402 is connected to the outer section grouting area 203, the orifice section pressurized return grouting pipe 403 is connected to the upper part of the outer section grouting area 203, the third sealing bag 4 and the first bag grouting pipe 301 are connected through, and the outer section grouting area 203 between the third sealing bag 4 and the second sealing bag 302 forms a closed space, and grouting is injected into the outer section grouting area 203. When the grouting pressure reaches 1.5Mpa, the grouting is stopped, and a second pressurized plugging area is formed at this time.

[0035] Embodiment 2, based on embodiment 1, the outer groove ring 101, the side cover ring 102, the side connecting slide column 103, and the support spring 104 are not provided, and the first sealing bag 30 and the second sealing bag 302 are directly exposed to the outside. The omission of the outer groove ring 101, the side cover ring 102, the side connecting slide column 103, and the support spring 104 simplifies the number of components and reduces the overall cost.

[0036] The working principle of this embodiment is as follows: the main hole section 201 is a hole formed by drilling, and the expansion section 2 is an enlarged part of the main hole section 201. Before the three-blocking and two-injection pressure-sealing hole is adopted, according to the different types of construction drilling holes and the diameters of the holes, it is necessary to select the first sealing bag 3, the second sealing bag 302, the third sealing bag 4 and the casing 1 that match the diameter of the expansion section 2 of the drilling hole of this type. When the first sealing bag 3 and the second sealing bag 302 are not grouting and do not expand, the first sealing bag 3 and the second sealing bag 302 are in the groove of the outer groove ring 101, supporting the elastic The spring 104 supports the side cover ring 102 to squeeze the first sealing bag 3 and the second sealing bag 302 to keep them in the groove of the outer groove ring 101. The outer groove ring 101 protects the first sealing bag 3 and the second sealing bag 302. When the sleeve 1 penetrates into the reaming section 2, the outer groove ring 101 and the inner wall of the reaming section 2 are in sliding contact, so as to avoid the first sealing bag 3 and the second sealing bag 302 from contacting with the inner wall of the reaming section 2 during the installation process, and to avoid the first sealing bag 3 and the second sealing bag 302 from being worn and damaged inside the reaming section 2.

[0037] After the casing 1 is installed in place, the first sealing bag 3 and the second sealing bag 302 are grouted through the first bag grouting pipe 301. The first sealing bag 3 and the second sealing bag 302 are simultaneously opened. The first sealing bag 3 and the second sealing bag 302 open the side cover ring 102 to one side. The first sealing bag 3 and the second sealing bag 302 expand and contact the inner wall of the expansion section 2. The inner section grouting area 202 between the first sealing bag 3 and the second sealing bag 302 forms a In the closed space, after the first sealing bag 3 and the second sealing bag 302 are filled, the first bag grouting pipe 301 continues to grout. After the bursting valve 303 is opened, the inner grouting area 202 starts grouting. After the inner grouting area 202 reaches the grouting pressure, the grouting is stopped to form the first pressurized plugging area. Then, the third sealing bag 4 is grouted and plugged through the second bag grouting pipe 401. The outer grouting area 203 between the third sealing bag 4 and the second sealing bag 302 is formed. A closed space is formed, grouting is performed through the orifice section pressure grouting pipe 402, and the orifice section pressure return grouting pipe 403 is immediately blocked after grouting, and then grouting is continued to the outer section grouting area 203, and the grouting is stopped when the grouting pressure reaches 1.5Mpa. At this time, the second pressure sealing area is formed, and the three-blocking and two-injection pressure sealing is completed; the first sealing bag 3, the second sealing bag 302, the third sealing bag 4, the inner section grouting area 202 and the outer section grouting area 203 form a three-blocking and two-injection pressure sealing area. The method of sealing the holes under pressure can solve the problems of loose sealing and easy gas leakage in gas extraction drilling holes. At the same time, the method of sealing the holes also meets the sealing requirements that the pressure test pressure of the water-stop casing in the exploration and drainage drilling holes is not less than 2.0MPa, there is no leakage in the drilling holes and the casing is not loose or pushed out, and the stabilization time is more than 30 minutes. It is applied to the pressure sealing of the water-stop casing in the Bei Er 1206 return high-position directional drilling hole and the Bei Er 709 Yunshun directional exploration and drainage hole in a certain mine. The actual sealing on site has achieved the ideal effect.

[0038] In this article, there are a few points to note:

[0039] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0040] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0041] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A three-blocking and two-injection sealing device, comprising: A sleeve (1), a hole expansion section (2), a first sealing bag (3) and a third sealing bag (4); the sleeve (1) is characterized in that the sleeve (1) is located inside the hole expansion section (2), the first sealing bag (3) surrounds the outer side of the head end section of the sleeve (1), the third sealing bag (4) surrounds the outer side of the tail end section of the sleeve (1), the head end and the middle part of the sleeve (1) are fixed with an outer groove ring (101), the sleeve (1) is slidably provided with a side cover ring (102) on one side of the outer groove ring (101), side connecting sliding columns (103) are fixed on both sides of the side cover ring (102), and support springs (104) are fixed on both sides of the side cover ring (102).

2. A three-blocking and two-injection sealing device according to claim 1, characterized in that: The side connection sliding column (103) and the sleeve (1) are connected in a sliding manner, the tail end of the support spring (104) is fixedly connected to the sleeve (1), and the support spring (104) supports the side cover ring (102) to move closer to the outer groove ring (101).

3. The three-blocking and two-injection sealing device according to claim 1 is characterized in that: The one-way valve of the first sealed bag (3) is connected to the first bag grouting pipe (301), the middle section one-way valve of the first bag grouting pipe (301) is connected to the second sealed bag (302), and the middle section of the first bag grouting pipe (301) is provided with a bursting valve (303).

4. A three-blocking and two-injection sealing device according to claim 3, characterized in that: The bursting valve (303) is located between the first sealing bag (3) and the second sealing bag (302); the first sealing bag (3) is located between the outer groove ring (101) and the side cover ring (102) at the head end of the sleeve (1); and the second sealing bag (302) is located between the outer groove ring (101) and the side cover ring (102) at the middle of the sleeve (1).

5. The three-blocking and two-injection sealing device according to claim 1 is characterized in that: The head end of the expansion section (2) is connected to the main hole section (201); the interval between the first sealing bag (3) and the second sealing bag (302) inside the expansion section (2) is the inner section grouting area (202); and the interval between the second sealing bag (302) and the third sealing bag (4) inside the expansion section (2) is the outer section grouting area (203).

6. A three-blocking and two-injection sealing device according to claim 5, characterized in that: The one-way valve of the third sealed bag (4) is connected to the second bag grouting pipe (401), the upper part of the third sealed bag (4) is penetrated by an orifice section of a pressurized grouting pipe (403), and the middle part of the third sealed bag (4) is penetrated by an orifice section of a pressurized grouting pipe (402).

7. The three-blocking and two-injection sealing device according to claim 6 is characterized in that: The orifice section pressurized grouting pipe (402) is connected to the outer section grouting area (203), the orifice section pressurized return grouting pipe (403) is connected to the upper part of the outer section grouting area (203), and the third sealing bag (4) and the first bag grouting pipe (301) are connected through.

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