Three-blocking and two-injecting hole sealing device

Abstract

The utility model provides a three-plugging two-injection hole sealing device, and relates to the technical field of gas extraction drilling plugging, the three-plugging two-injection hole sealing device comprises a gas extraction pipe, a mounting seat, a first bag, a second bag and a third bag are sequentially arranged on the gas extraction pipe from left to right, a hole sealing grouting section is arranged between every two adjacent bags, and a supporting seat is arranged in the hole sealing grouting section and located on the gas extraction pipe; the supporting seat is arranged on the portion, located on the gas extraction pipe, in the hole sealing and grouting section, the supporting seat is provided with the supporting and protecting assemblies, and the supporting and protecting assemblies are evenly arranged on the supporting seat along the circumferential side of the gas extraction pipe and used for protecting the bags. The gas extraction pipe is supported in the process of being pushed into the drill hole through the supporting and protecting assembly and the supporting base, abrasion caused in the pushing process due to the fact that the bag makes contact with the inner wall of the drill hole is avoided, the sealing performance and normal work of the bag are guaranteed, the sealing effect of the drill hole is guaranteed, and safety and high efficiency of gas extraction operation are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas extraction drilling hole sealing, in particular to a three-sealing and two-injection hole sealing device. BACKGROUND

[0002] In order to reduce the risk of safety accidents caused by gas leakage, the gas extraction drilling hole needs to be sealed before gas extraction. Compared with the traditional "two-sealing and one-injection" hole sealing process, the "three-sealing and two-injection" hole sealing process can more effectively avoid the crack area of the roadway surrounding rock, eliminate the influence of the loose circle on the drilling hole sealing section, make the slurry fully combined with the drilling hole and the surrounding cracks, and ensure the tightness of the hole sealing.

[0003] In the "three-sealing and two-injection" hole sealing process, three capsules (first capsule, second capsule and third capsule) are used to seal the drilling hole before grouting, and the drilling hole is divided into two grouting sections, i.e. the first hole sealing grouting section and the second hole sealing grouting section. Then, the grouting pump is used to inject slurry into the two grouting sections through the grouting pipe. Under the action of the grouting pressure, the slurry seeps into the coal body cracks within a certain depth around the drilling hole, realizing the sealing of the extraction drilling hole, and the discharged gas is discharged outward through the exhaust and slurry return pipe.

[0004] However, during the drilling process, the hole wall of part of the holes presents an uneven state, and even there are sharp protrusions. When the capsules of the three-sealing and two-injection hole sealing device are pushed into the hole, they are prone to friction with the uneven parts of the hole wall and the protrusions. Especially in the horizontal section drilling, due to the action of gravity, the capsules have a significant tendency to sag, and the probability of contact with the hole wall increases significantly, resulting in capsule damage, which seriously affects the sealing effect of the drilling hole and poses a potential threat to the safety and efficiency of gas extraction operations. SUMMARY

[0005] The purpose of the present application is to provide a three-sealing and two-injection hole sealing device which can solve the technical problem that the capsules of the existing three-sealing and two-injection hole sealing device are prone to friction with uneven hole walls and protrusions when pushed into the hole, causing capsule damage, which seriously affects the sealing of the drilling hole and threatens the safety and efficiency of gas extraction.

[0006] The present application provides a three-sealing and two-injection hole sealing device, which comprises a gas extraction pipe, the gas extraction pipe is provided with a mounting seat, a first capsule, a second capsule and a third capsule from left to right in sequence, and the adjacent two capsules are a hole sealing grouting section, the mounting seat is provided with an inflation assembly for inflating the first capsule, the second capsule and the third capsule, a grouting assembly for grouting and sealing the hole sealing grouting section, and an exhaust and slurry return assembly for discharging the gas and excess slurry in the hole sealing grouting section, and the hole sealing grouting section is provided with a support seat on the gas extraction pipe, and a plurality of support protection assemblies for protecting the capsules are uniformly arranged on the support seat along the circumferential side of the gas extraction pipe.

[0007] Further, the support protection assembly comprises a connecting cylinder, a spring, a support guide rod and a protection roller, one end of the connecting cylinder is fixed on the support seat, one end of the support guide rod is movably arranged in the connecting cylinder, the protection roller is rotatably arranged at the other end of the support guide rod, and the support guide rod is connected with the connecting cylinder through the spring.

[0008] Further, a first limiting ring is arranged on the support guide rod, a second limiting ring is arranged on the inner wall of the end of the connecting cylinder away from the support seat, the first limiting ring is located above the second limiting ring, one end of the spring is connected with the first limiting ring, and the other end of the spring is connected with the inner top of the connecting cylinder.

[0009] Further, a plurality of threaded holes are uniformly arranged on the support seat along the circumferential side of the gas extraction pipe, locking bolts are threadedly connected in the threaded holes, and the end portions of the locking bolts abut against the gas extraction pipe.

[0010] Further, the inflation assembly comprises a first inflation pipe, a second inflation pipe and a third inflation pipe, the first inflation pipe is connected with the first bag, the first bag is provided with a first inflation accommodation hole matched with the second inflation pipe, one end of the second inflation pipe penetrates through the first inflation accommodation hole and is connected with the second bag, the first bag and the second bag are provided with second inflation accommodation holes matched with the third inflation pipe, one end of the third inflation pipe penetrates through the two second inflation accommodation holes and is connected with the third bag, and the first inflation pipe, the second inflation pipe and the third inflation pipe are all provided with inflation valves.

[0011] Further, the grouting assembly comprises a first grouting pipe and a second grouting pipe, the first bag is provided with a first grouting accommodation hole matched with the first grouting pipe, one end of the first grouting pipe penetrates through the first grouting accommodation hole and communicates with the hole sealing and grouting section between the first bag and the second bag, the first bag and the second bag are provided with second grouting accommodation holes matched with the second grouting pipe, and one end of the second grouting pipe penetrates through the two second grouting accommodation holes and communicates with the hole sealing and grouting section between the second bag and the third bag.

[0012] Further, the exhaust gas back slurry assembly comprises a first exhaust gas back slurry pipe and a second exhaust gas back slurry pipe, the first bag is provided with a first exhaust gas back slurry accommodating hole matched with the first exhaust gas back slurry pipe, one end of the first exhaust gas back slurry pipe penetrates through the first exhaust gas back slurry accommodating hole and communicates with the hole sealing and grouting section between the first bag and the second bag, the first bag and the second bag are provided with a second exhaust gas back slurry accommodating hole matched with the second exhaust gas back slurry pipe, one end of the second exhaust gas back slurry pipe penetrates through the two second exhaust gas back slurry accommodating holes and communicates with the hole sealing and grouting section between the second bag and the third bag.

[0013] The utility model discloses beneficial effect has:

[0014] The utility model discloses support seat is located on the gas extraction pipe in the hole sealing and grouting section, is equipped with the support protection subassembly on the support seat, and the support protection subassembly and the support seat are used for supporting the gas extraction pipe in the process of advancing in the borehole, avoid the contact of bag and borehole inner wall and cause abrasion in the advancing process, guarantee the sealing property and normal work of bag, ensure the sealing effect of borehole, guarantee the security and high efficiency of gas extraction operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, without paying the creative labor, can also obtain other related drawings according to these drawings.

[0016] Figure 1 For the structural schematic diagram of some embodiments of the present application;

[0017] Figure 2 For the structural schematic diagram of support seat and support protection subassembly in some embodiments of the present application;

[0018] Figure 3 For the sectional view of support seat and support protection subassembly in some embodiments of the present application;

[0019] The reference signs are respectively:

[0020] 1, gas extraction pipe; 2, mounting seat; 3, first bag; 4, second bag; 5, third bag; 6, hole sealing and grouting section; 7, inflation assembly; 71, first inflation pipe; 72, second inflation pipe; 73, third inflation pipe; 8, grouting assembly; 81, first grouting pipe; 82, second grouting pipe; 9, exhaust and grouting return assembly; 91, first exhaust and grouting return pipe; 92, second exhaust and grouting return pipe; 10, support seat; 101, locking bolt; 11, support protection assembly; 111, connecting cylinder; 1111, second limiting ring; 112, spring; 113, support guide rod; 1131, first limiting ring; 114, protection roller. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0023] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] Furthermore, the terms "horizontal", "vertical", "overhang", and the like, do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. Specific embodiments:

[0028] As shown in Figure 1 and Figure 2 The present application provides a three-wall two-injection hole sealing device, which comprises a gas extraction pipe 1, and the gas extraction pipe 1 is sequentially provided with a mounting seat 2, a first bag 3, a second bag 4 and a third bag 5 from left to right, and the adjacent two bags are a hole sealing and grouting section 6, the mounting seat 2 is provided with an inflation assembly 7 for inflating the first bag 3, the second bag 4 and the third bag 5, a grouting assembly 8 for hole sealing and grouting of the hole sealing and grouting section 6, and an exhaust and grout return assembly 9 for discharging gas and excess grout in the hole sealing and grouting section 6, a support seat 10 is arranged on the gas extraction pipe 1 in the hole sealing and grouting section 6, and a plurality of support and protection assemblies 11 for protecting the bag are uniformly arranged on the support seat 10 along the circumferential side of the gas extraction pipe 1. The support and protection assemblies 11 and the support seat 10 support the gas extraction pipe 1 during the advancing process in the drilling hole, avoid the contact between the bag and the inner wall of the drilling hole, and cause wear during the advancing process, ensure the sealing property and normal work of the bag, ensure the sealing effect of the drilling hole, and ensure the safety and efficiency of the gas extraction operation.

[0029] As shown in Figures 1-3As shown, the support protection assembly 11 comprises a connecting cylinder 111, a spring 112, a support guide rod 113 and a protection roller 114. One end of the connecting cylinder 111 is fixed on the support seat 10. One end of the support guide rod 113 is movably arranged in the connecting cylinder 111. The protection roller 114 is rotatably arranged at the other end of the support guide rod 113. The support guide rod 113 is connected with the connecting cylinder 111 through the spring 112. When the bag moves in the borehole, the protection roller 114 directly contacts with the borehole wall to prevent the bag from contacting with the inner wall of the borehole. Since the protection roller 114 is rotatably arranged on the support guide rod 113, the protection roller 114 can roll on the surface of the borehole wall during the relative movement between the bag and the borehole wall, so as to convert the sliding friction into rolling friction and effectively reduce the friction. One end of the support guide rod 113 is movably arranged in the connecting cylinder 111 and connected with the connecting cylinder 111 through the spring 112. During the advancing process, the bag is not inflated and is within the support protection range of the protection roller 114. The protection roller 114 is subjected to the reaction force from the borehole wall. The protection roller 114 drives the support guide rod 113 to retract into the connecting cylinder 111. The spring 112 plays a role of buffering and resetting. The combination structure of the spring 112, the support guide rod 113 and the connecting cylinder 111 enables the protection roller 114 to automatically adjust the position according to the actual shape and stress condition of the borehole wall, so as to adapt to various complex borehole wall conditions. No matter whether the borehole wall is locally concave, convex or has an angle change, the protection assembly can timely adjust and provide continuous support protection for the bag, thereby enhancing the adaptability of the hole sealing device in different boreholes.

[0030] As shown in Figure 3 The support guide rod 113 is provided with a first limiting ring 1131. The inner wall of the end of the connecting cylinder 111 away from the support seat 10 is provided with a second limiting ring 1111. The first limiting ring 1131 is located above the second limiting ring 1111. One end of the spring 112 is connected with the first limiting ring 1131. The other end of the spring 112 is connected with the inner top of the connecting cylinder 111. The first limiting ring 1131 cooperates with the second limiting ring 1111 to limit the movement range of the support guide rod 113, so as to prevent the support guide rod 113 from completely coming out of the connecting cylinder 111, ensure the integrity and stability of the structure of the support protection assembly 11 and maintain the normal working state.

[0031] As shown in Figures 1-3As shown, the support seat 10 is uniformly provided with a plurality of threaded holes along the periphery of the gas extraction pipe 1, and a locking bolt 101 is threadedly connected in the threaded hole. The end of the locking bolt 101 abuts against the gas extraction pipe 1. In actual gas extraction operation, the position of the support seat 10 can be flexibly adjusted according to the specific situation of the borehole and the installation requirements of the bag. Specifically, during installation, the locking bolt 101 is screwed in so that the end thereof abuts against the outer wall of the gas extraction pipe 1, and the support seat 10 is fixed by the friction force generated by screwing. If the position needs to be adjusted, the bolt is unscrewed in the opposite direction so that the support seat 10 can move on the pipe. After being positioned, the bolt is again tightened to achieve re-fixing.

[0032] As shown in Figure 1 The inflation assembly 7 includes a first inflation pipe 71, a second inflation pipe 72 and a third inflation pipe 73. The first inflation pipe 71 is connected with the first bag 3. The first bag 3 is provided with a first inflation accommodation hole matched with the second inflation pipe 72. One end of the second inflation pipe 72 penetrates through the first inflation accommodation hole and is connected with the second bag 4. The first bag 3 and the second bag 4 are provided with second inflation accommodation holes matched with the third inflation pipe 73. One end of the third inflation pipe 73 penetrates through the two second inflation accommodation holes and is connected with the third bag 5. The first inflation pipe 71, the second inflation pipe 72 and the third inflation pipe 73 are all provided with inflation valves (not shown in the figure). By controlling the inflation valves on different inflation pipes, inflation operation can be independently performed on each bag to achieve precise inflation control, so that each bag can reach a suitable inflation degree to meet the sealing requirement.

[0033] As shown in Figure 1 The grouting assembly 8 includes a first grouting pipe 81 and a second grouting pipe 82. The first bag 3 is provided with a first grouting accommodation hole matched with the first grouting pipe 81. One end of the first grouting pipe 81 penetrates through the first grouting accommodation hole and communicates with the sealing grouting section 6 between the first bag 3 and the second bag 4. The first bag 3 and the second bag 4 are provided with second grouting accommodation holes matched with the second grouting pipe 82. One end of the second grouting pipe 82 penetrates through the two second grouting accommodation holes and communicates with the sealing grouting section 6 between the second bag 4 and the third bag 5. The first grouting pipe 81 and the second grouting pipe 82 correspond to different sealing grouting sections 6, respectively, so that the two sealing grouting sections 6 can perform grouting operation respectively. According to the geological conditions and sealing requirements of different regions, the grouting parameters can be flexibly adjusted.

[0034] As shown in Figure 1As shown, the exhaust slurry return assembly 9 comprises a first exhaust slurry return pipe 91 and a second exhaust slurry return pipe 92, the first bag 3 is provided with a first exhaust slurry return accommodating hole matched with the first exhaust slurry return pipe 91, one end of the first exhaust slurry return pipe 91 penetrates the first exhaust slurry return accommodating hole and communicates with the hole sealing and grouting section 6 between the first bag 3 and the second bag 4, the first bag 3 and the second bag 4 are provided with second exhaust slurry return accommodating holes matched with the second exhaust slurry return pipe 92, one end of the second exhaust slurry return pipe 92 penetrates the two second exhaust slurry return accommodating holes and communicates with the hole sealing and grouting section 6 between the second bag 4 and the third bag 5, since there is originally air in the borehole, when the slurry is injected into the hole sealing and grouting section 6, the gas is extruded and discharged through the first exhaust slurry return pipe 91 or the first exhaust slurry return pipe 91, so as to prevent the gas accumulation from affecting the slurry filling effect, guarantee the grouting quality, the discharged gas makes the slurry filling sufficient, prevents the pressure abnormality, and avoids the bag rupture.

[0035] The above is only the preferred embodiment of the present application and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-pack two-shot hole sealing device, characterized by: The gas extraction pipe is sequentially provided with a mounting seat, a first bag, a second bag and a third bag from left to right, and a sealing and grouting section is arranged between adjacent two bags.

2. A three-pack two-injection hole sealing device according to claim 1, characterized in that: The support protection assembly comprises a connecting cylinder, a spring, a support guide rod and a protection roller, one end of the connecting cylinder is fixedly arranged on the support seat, one end of the support guide rod is movably arranged in the connecting cylinder, and the protection roller is rotatably arranged at the other end of the support guide rod.

3. A three-pack two-injection hole sealing device according to claim 2, characterized in that: The support guide rod is connected with the connecting cylinder through the spring.

4. A three-pack two-injection hole sealing device according to claim 1, characterized in that: A plurality of threaded holes are uniformly arranged on the support seat along the circumferential side of the gas extraction pipe, lock bolts are threadedly connected in the threaded holes, and the end portions of the lock bolts abut against the gas extraction pipe.

5. A three-pack two-injection hole sealing device according to claim 1, characterized in that: The inflation assembly comprises a first inflation pipe, a second inflation pipe and a third inflation pipe, the first inflation pipe is connected with the first bag, the first bag is provided with a first inflation accommodation hole matched with the second inflation pipe, one end of the second inflation pipe penetrates through the first inflation accommodation hole and is connected with the second bag, the first bag and the second bag are provided with second inflation accommodation holes matched with the third inflation pipe, one end of the third inflation pipe penetrates through the two second inflation accommodation holes and is connected with the third bag, and the first inflation pipe, the second inflation pipe and the third inflation pipe are all provided with inflation valves.

6. A three-pack, two-shot hole sealing device according to claim 1, wherein: The grouting assembly comprises a first grouting pipe and a second grouting pipe, the first bag is provided with a first grouting accommodation hole matched with the first grouting pipe, one end of the first grouting pipe penetrates through the first grouting accommodation hole and communicates with the sealing and grouting section between the first bag and the second bag, the first bag and the second bag are provided with second grouting accommodation holes matched with the second grouting pipe, and one end of the second grouting pipe penetrates through the two second grouting accommodation holes and communicates with the sealing and grouting section between the second bag and the third bag.

7. A three-pack, two-shot hole sealing device according to claim 1, wherein: The exhaust gas back slurry assembly comprises a first exhaust gas back slurry pipe and a second exhaust gas back slurry pipe, the first bag is provided with a first exhaust gas back slurry accommodation hole matched with the first exhaust gas back slurry pipe, one end of the first exhaust gas back slurry pipe penetrates through the first exhaust gas back slurry accommodation hole and communicates with a hole sealing and grouting section between the first bag and the second bag, the first bag and the second bag are provided with second exhaust gas back slurry accommodation holes matched with the second exhaust gas back slurry pipe, one end of the second exhaust gas back slurry pipe penetrates through the two second exhaust gas back slurry accommodation holes and communicates with a hole sealing and grouting section between the second bag and the third bag.

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