Blowout preventer for drilling
By designing a drilling and spray-proof device using a main body and expansion parts, the existing device has solved the problems of complex structure, large weight and high manufacturing cost, and effective sealing and safety improvements inside and outside the drilling hole are achieved.
Patent Information
- Application Number
- CN202421958198.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The existing drilling and anti-blasting devices have complex structures, large weight, difficult to handle and high manufacturing costs, making it difficult to effectively solve the problem of harmful gas leakage such as coal seam gas.
A drilling anti-blasting device is designed, adopting a combined structure of the main body and the expansion member. After expansion, the expansion member supports the main body and seals the gap inside and outside the drill hole to ensure that gas and dust do not leak.
The sealing effect between the inside and outside of the drilling hole is achieved, which prevents harmful gas leakage, improves the safety of drilling operations, and reduces the weight of the device and manufacturing cost.
Smart Images
Figure CN222962838U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mining equipment, and specifically, to a borehole blowout prevention device. Background Art
[0002] During the process of borehole drilling in a mine, since the diameter of the drill bit is larger than that of the drill pipe, harmful gases such as gas in the coal seam will escape from the gap between the drill pipe and the hole wall. The harmful gases such as gas entering the mine are very likely to cause phenomena such as explosion and personnel poisoning. The blowout prevention device for mine boreholes can effectively block the solid particles and harmful gases ejected from the hole.
[0003] The existing borehole safety protection devices usually add a harmful gas collection device at the entrance of the borehole. A part of the device extends into the borehole. The general main body of the device is cylindrical. The cylindrical main body is fixed in the borehole by a support rod driven by a connecting rod. However, in actual use, the cylindrical body with a support rod is usually heavy, not easy to carry and place, and the manufacturing cost is relatively high. Summary of the Utility Model
[0004] The utility model provides a borehole blowout prevention device, which solves the problem of the complex structure of the borehole blowout prevention device in the related art.
[0005] The technical solution of the utility model is as follows:
[0006] A borehole blowout prevention device includes:
[0007] A main body having a first end and a second end. The first end extends into the borehole, and the second end is located outside the borehole. The main body has a first internal space for the drill pipe and gas to pass through;
[0008] An expansion member is arranged on the main body. The expansion member is located between the outer wall of the main body and the inner wall of the borehole. After the expansion member expands, it is used to support the main body and seal the gap between the outer wall of the main body and the inner wall of the borehole.
[0009] Optionally, it further includes:
[0010] A cylindrical member is arranged at the second end of the main body. The cylindrical member has a second internal space, and the second internal space is communicated with the first internal space. The drill pipe sequentially passes through the second internal space and the first internal space. The cylindrical member has an air outlet.
[0011] Optionally, it further includes:
[0012] A first sealing member is arranged on the cylindrical member. The first sealing member is located between the drill pipe and the inner wall of the cylindrical member. The first sealing member is used to seal the gap between the drill pipe and the inner wall of the cylindrical member.
[0013] Optionally, the air outlet is connected to a negative pressure fan.
[0014] Optionally, the air outlet is located at one end of the cylinder away from the ground. The cylinder also has a slag discharge port for discharging the solids carried out from the borehole, and the slag discharge port is located at one end of the cylinder close to the ground.
[0015] Optionally, it further includes:
[0016] A second seal, arranged in the second internal space, and the second seal is further away from the borehole relative to the slag discharge port.
[0017] Optionally, it further includes:
[0018] A catenary, with one end arranged on the cylinder and the other end arranged on a fixed bracket in the mine.
[0019] Optionally, it further includes:
[0020] A copper layer, arranged on the main body and the inner wall of the cylinder.
[0021] Optionally, the expansion member is a water bladder.
[0022] Optionally, it further includes:
[0023] A second connecting pipe, arranged on the main body, with one end located outside the borehole and the other end located inside the expansion member. The second connecting pipe is used for filling and discharging liquid into the expansion member;
[0024] A stop valve, arranged at one end of the second connecting pipe located outside the borehole.
[0025] The working principle and beneficial effects of the present utility model are as follows:
[0026] In the present utility model, the main body has a first end and a second end, where the first end extends into the borehole and the second end is located outside the borehole. A first internal space is provided inside the main body for the drill pipe and gas to pass through. The expansion member is arranged on the main body, between the main body and the borehole wall. When the expansion member expands, it can not only tightly fill the gap between the main body and the borehole to form an effective seal, preventing substances such as gas, dust, or water in the borehole from leaking out between the main body and the borehole, while preventing external substances from entering the borehole to ensure the safety of the working environment, but also provide a supporting effect for the main body, enabling the main body to be stably fixed in the borehole. After the expansion member contracts, it is more convenient for the main body to enter or leave the borehole.
[0027] During actual drilling operations, the flammable, explosive, and harmful gases leaking from the coal seam can only flow out from the first internal space, which is beneficial for the collection of flammable and explosive gases and prevents gas diffusion from causing accidents. Brief Description of the Drawings
[0028] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the present utility model in a clear and understandable manner in combination with the drawings of the preferred embodiments.
[0029] Figure 1 It is a schematic structural view of the present utility model;
[0030] Figure 2 It is a schematic sectional view of the present utility model.
[0031] In the figures: 100, main body; 110, first end; 120, second end; 130, first internal space; 200, expansion member; 800, cylinder member; 810, second internal space; 820, air outlet; 830, first seal; 840, slag discharge port; 850, second seal; 910, catenary; 720, second communication pipe; 300, stop valve. Detailed Embodiment
[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will describe the specific embodiments of the present utility model with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings and other embodiments can be obtained.
[0033] To make the drawings concise, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some figures, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".
[0034] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0035] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0036] Reference Figures 1 to 2 Referring to Figures 1 to 2 , the present utility model provides a drilling blowout prevention device, which includes a main body 100 having a first end 110 and a second end 120. The first end 110 extends into the drilling hole, and the second end 120 is located outside the drilling hole. The main body 100 has a first internal space 130 for the drill pipe and gas to pass through. An expansion member 200 is provided on the main body 100. The expansion member 200 is located between the outer wall of the main body 100 and the inner wall of the drilling hole. After the expansion member 200 expands, it is used to support the main body 100 and seal the gap between the outer wall of the main body 100 and the inner wall of the drilling hole.
[0037] In this embodiment, the main body 100 has a first end 110 and a second end 120, where the first end 110 extends into the drilling hole, and the second end 120 is located outside the drilling hole. The main body 100 is provided with a first internal space 130 for the drill pipe and gas to pass through. The expansion member 200 is provided on the main body 100 and is located between the main body 100 and the drilling hole wall. When the expansion member 200 expands, it can not only tightly fill the gap between the main body 100 and the drilling hole to form an effective seal, preventing substances such as gas, dust, or water in the drilling hole from leaking out between the main body 100 and the drilling hole, while preventing external substances from entering the drilling hole to ensure the safety of the working environment, but also provide a supporting effect for the main body 100, enabling the main body 100 to be stably fixed in the drilling hole. After the expansion member 200 contracts, it is more convenient for the main body 100 to enter or leave the drilling hole.
[0038] In actual drilling operations, the flammable, explosive, and harmful gases leaked from the coal seam can only flow out from the first internal space 130, which is beneficial to the collection of flammable and explosive gases and prevents gas diffusion from causing accidents.
[0039] Furthermore, it further includes a cylinder member 800 provided at the second end 120 of the main body 100. The cylinder member 800 has a second internal space 810, and the second internal space 810 is communicated with the first internal space 130. The drill pipe sequentially passes through the second internal space 810 and the first internal space 130. The cylinder member 800 has an air outlet 820.
[0040] In this embodiment, under normal circumstances, the gas in the drilling hole enters the second internal space 810 from the first internal space 130, and the gas in the second internal space 810 can be discharged from the air outlet 820 into the gas collection device. Collecting gas from the air outlet 820 is more conducive to preventing gas leakage.
[0041] Furthermore, it further includes a first seal 830 provided on the cylinder member 800. The first seal 830 is located between the drill pipe and the inner wall of the cylinder member 800, and the first seal 830 is used to seal the gap between the drill pipe and the inner wall of the cylinder member 800.
[0042] In this embodiment, the drill pipe passes through the cylinder 800 and the main body 100 for drilling. The first seal 830 between the drill pipe and the inner wall of the cylinder 800 is in a dynamic sealing form with the drill pipe, which can prevent gas from leaking through the gap between the drill pipe and the cylinder 800.
[0043] Furthermore, the air outlet 820 is connected to a negative pressure fan.
[0044] In this embodiment, the air outlet 820 of the cylinder 800 is connected to a negative pressure fan, which can adsorb and collect the gas in the second internal space 810.
[0045] Furthermore, the air outlet 820 is located at one end of the cylinder 800 away from the ground. The cylinder 800 also has a slag discharge port 840 for discharging the solids carried out of the borehole. The slag discharge port 840 is located at one end of the cylinder 800 close to the ground.
[0046] In this embodiment, when the drill pipe and the drill bit drill a hole in the coal seam, the crushed slag generated by the drilling will be carried out. After the crushed slag enters the second internal space 810, it will be blocked by the second seal 850 and fall into the slag discharge port 840 under the action of gravity, and finally discharged from the device.
[0047] The air outlet 820 is located at one end of the cylinder 800 away from the ground, and the adsorption of gas by the negative pressure fan will not affect the falling of solids.
[0048] Furthermore, a second seal 850 is provided in the second internal space 810, and the second seal 850 is farther from the borehole relative to the slag discharge port 840.
[0049] In this embodiment, the slag discharge port 840 is closer to the borehole relative to the second seal 850, which can enable the crushed slag solids to freely fall under the action of gravity. The second seal 850 is farther from the slag discharge port 840 relative to the borehole, which can ensure that the crushed slag carried out of the borehole can fall into the slag discharge port 840 after being blocked by the second seal 850. The second seal 850 only needs to block the passage of solids without blocking them. On the one hand, it can reduce costs, and on the other hand, it can prevent the fixed object from hitting the first seal 830 and affecting the service life and sealing effect of the first seal 830.
[0050] Furthermore, one end of a catenary 910 is provided on the cylinder 800, and the other end is provided on a fixed bracket in the mine.
[0051] In this embodiment, the catenary 910 can play a role in suspending the cylinder 800, preventing the cylinder 800 from sagging towards the ground under the action of gravity, thereby causing the main body 100 in the borehole to be skewed.
[0052] Furthermore, a copper layer is provided on the inner wall of the main body 100 and the cylinder 800.
[0053] In this embodiment, a copper layer is provided on the inner wall of the main body 100 and the barrel member 800, which can prevent sparks from being generated when the drill pipe collides with the inner wall of the main body 100 or the barrel member 800 due to high-speed rotation.
[0054] Furthermore, the expansion member 200 is a water bladder.
[0055] In this embodiment, water is a fluid that is almost incompressible, which means that the water bladder can provide more stable support and pressure distribution after being filled. In a high-pressure environment, the water bladder can transmit pressure more evenly, reduce local stress concentration, and provide a more reliable sealing effect.
[0056] Furthermore, a second connecting pipe 720 is provided on the main body 100. One end of the second connecting pipe 720 is located outside the borehole, and the other end is located inside the expansion member 200. The second connecting pipe 720 is used to fill and discharge liquid into the expansion member 200; a stop valve 300 is provided at one end of the second connecting pipe 720 located outside the borehole.
[0057] In this embodiment, the second connecting pipe 720 can fill and discharge liquid into the expansion member 200. One end of the second connecting pipe 720 is located outside the borehole, which is convenient for connecting the second connecting pipe 720 to a water source. The stop valve 300 is provided at one end of the second connecting pipe 720 located outside the borehole, which can close the second connecting pipe 720. On the one hand, it can prevent the liquid in the expansion member 200 from flowing out through the second connecting pipe 720, so as to keep the pressure of the expansion member 200. On the other hand, it can prevent external impurities from entering the expansion member 200 through the second connecting pipe 720 and affecting the use of the expansion member 200.
[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.
Claims
1. A drilling blowout prevention device, characterized in that: include: A main body (100) having a first end (110) and a second end (120), wherein the first end (110) extends into a borehole, and the second end (120) is located outside the borehole, and the main body (100) has a first internal space (130), and the first internal space (130) is used for a drill pipe and gas to pass through; an expansion member (200) disposed on the main body (100), the expansion member (200) being located between the outer wall of the main body (100) and the inner wall of the drill hole, and the expansion member (200) being used to support the main body (100) and seal the gap between the outer wall of the main body (100) and the inner wall of the drill hole after expansion; A cylinder (800) is arranged at the second end (120) of the main body (100), and the drill rod passes through the cylinder (800); A first sealing member (830) is arranged on the barrel (800), the first sealing member (830) is located between the drill rod and the inner wall of the barrel (800), and the first sealing member (830) is used to seal the gap between the drill rod and the inner wall of the barrel (800).
2. A drilling blowout prevention device according to claim 1, characterized in that: The cylinder (800) has a second internal space (810), the second internal space (810) is connected to the first internal space (130), the drill rod passes through the second internal space (810) and the first internal space (130) in sequence, and the cylinder (800) has an air outlet (820).
3. A drilling blowout prevention device according to claim 2, characterized in that: The air outlet (820) is connected to a negative pressure fan.
4. A drilling blowout prevention device according to claim 2, characterized in that: The gas outlet (820) is located at an end of the cylinder (800) away from the ground. The cylinder (800) also has a slag discharge port (840) for discharging solids brought out of the borehole. The slag discharge port (840) is located at an end of the cylinder (800) close to the ground.
5. A drilling blowout prevention device according to claim 4, characterized in that: Also includes: The second sealing member (850) is disposed in the second internal space (810), and the second sealing member (850) is further away from the drill hole than the slag discharge port (840).
6. A drilling blowout prevention device according to claim 2, characterized in that: Also includes: A catenary (910) has one end arranged on the cylinder (800) and the other end arranged on a fixed support in the mine.
7. A drilling blowout prevention device according to claim 2, characterized in that: Also includes: A copper layer is provided on the main body (100) and the inner wall of the cylinder (800).
8. The drilling blowout prevention device according to claim 1, characterized in that: The expansion member (200) is a water bag.
9. A drilling blowout prevention device according to claim 1, characterized in that: Also includes: a second connecting tube (720) disposed on the main body (100), one end of the second connecting tube (720) being located outside the borehole and the other end being located inside the expansion member (200), the second connecting tube (720) being used for filling or discharging liquid into or out of the expansion member (200); A stop valve (300) is provided at an end of the second connecting pipe (720) located outside the borehole.