Blowout prevention and dust removal device for drilling
By designing a drilling anti-blasting dust removal device including a spray mechanism and a sealing gasket, the problem of unfixed coal dust blockage during underground drilling of coal mines is solved, and efficient slag resistance, dust reduction and safe production results are achieved.
Patent Information
- Application Number
- CN202422070858.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-23
AI Technical Summary
During the drilling process of underground drilling of coal mines, the existing soft coal directional blowout device has the problem of untrue coal dust blocking, which causes coal dust mixed with gas to gush out from the slag droplet and drill pipe drilling inlet, affecting the environment at the construction site and the health of the workers.
A drilling anti-blasting dust removal device is designed, including a blowout chamber, a slag return port, a drilling inlet, a extraction port, a slag drop port and a spray mechanism. The water curtain is sprayed out of the spray mechanism to wet the return slag and coal dust, and ensure that the coal dust is effectively sealed through the sealing gasket and flange structure.
It improves the slag resistance and dust reduction efficiency when drilling, reduces the gushing of coal dust at the construction site, improves the visibility of the tunnel, reduces the impact on the workers, and enhances the effect of safe production.
Smart Images
Figure CN222909984U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of underground coal mine drilling, in particular to a drilling anti-blowout dust removal device. Background Art
[0002] In underground coal mines, the directional drilling process of soft coal seams uses compressed air to drive the air screw motor. The air screw motor must have sufficient air volume and air pressure to be driven, and the drill cuttings and slag at the bottom of the hole are also returned to the hole mouth from the bottom of the hole by compressed air and drill rods. The drill cuttings and slag are then processed through the blowout prevention device and the air-water separation device to the conveyor belt or designated place.
[0003] Due to the large amount of drill cuttings and slag, fine particles, sufficient compressed air and high pressure, the drill cuttings and slag returned to the hole mouth form coal dust mixed with gas. During the compressed air drilling construction process, the existing soft coal directional blowout prevention device has the defect that the coal dust is not properly sealed after the slag is returned from the slag outlet and the drill pipe inlet, resulting in a large amount of coal dust mixed with gas gushing out from the slag outlet and the drill pipe inlet. The gushing coal dust causes the entire construction site to have a high coal dust concentration and low visibility, affecting the environment of the entire drilling site and tunnels; and the large amount of gushing coal dust is facing the drilling rig operating table, which also seriously affects the operation of the drilling rig by the operators and the physical and mental health of the operators. Utility Model Content
[0004] The technical problem to be solved by the utility model is to improve the slag blocking and dust reduction efficiency during drilling.
[0005] The utility model solves the above-mentioned technical problems through the following technical means: a drilling anti-blowout dust removal device, comprising an anti-blowout cavity, a slag return port, a drill inlet, an extraction port, a slag drop port and a spray mechanism, the front and rear sides of the anti-blowout cavity are respectively provided with a slag return port and a drill inlet connected to its inner cavity, the upper and lower sides of the anti-blowout cavity are respectively provided with an extraction port and a slag drop port connected to its inner cavity, and the inner ends of the slag return port, the drill inlet and the slag drop port are all surrounded by a spray mechanism.
[0006] As an optimized technical solution, each spray mechanism is interconnected and connected to a water inlet joint and an air inlet joint arranged outside the anti-blowout cavity.
[0007] As an optimized technical solution, the spray mechanism adopts an annular tube, and two rows of spray holes distributed in staggered directions are provided on the annular tube.
[0008] As an optimized technical solution, the outer end of the slag return port is fixedly connected with a first flange.
[0009] As an optimized technical solution, the drilling anti-blowout dust removal device also includes a first sealing gasket and a pressure cover. The outer side of the anti-blowout cavity is fixedly connected with a concave ring. The first sealing gasket is arranged inside the concave ring. The pressure cover is pressed on the outer side of the first sealing gasket and fixedly connected to the concave ring.
[0010] As an optimized technical solution, the drilling anti-blowout dust removal device also includes a second sealing gasket and a second flange, the second sealing gasket is arranged in a groove on the outside of the pressure cover, and the second flange is pressed on the outside of the second sealing gasket and fixedly connected to the pressure cover.
[0011] As an optimized technical solution, the drill inlet is composed of the pressure cover, the second sealing gasket and the second flange, and the spray mechanism at the inner end of the drill inlet is arranged between the first sealing gasket and the second sealing gasket.
[0012] As an optimized technical solution, the first sealing gasket and the second sealing gasket are both made of rubber.
[0013] As an optimized technical solution, the second flange is composed of two symmetrically separated semi-annular flanges.
[0014] As an optimized technical solution, two extraction ports are provided, and the two extraction ports are symmetrically distributed on the left and right sides directly above the slag drop port.
[0015] The advantages of the utility model are:
[0016] 1. It improves the efficiency of slag prevention and dust reduction during drilling, improves the environment of soft coal directional drilling operation site and tunnel, seals the coal dust in the blowout prevention device, reduces the coal dust overflowing in the operation site and tunnel, and improves the visibility of the tunnel; reduces the impact of coal dust directly spraying the operating table on the operator's operation of the drilling rig, reduces safety hazards, allows the drilling rig operator to observe the operation hole more clearly, improves safety effects, and helps safe production.
[0017] 2. Three slag-blocking and dust-reducing measures are formed at the drill inlet through the first sealing pad, the spray mechanism and the second sealing pad, further realizing the slag-blocking and dust-reducing effect of the blowout preventer on drill cuttings during soft coal directional drilling operations.
[0018] 3. The vulnerable parts are easy to replace, which increases the service life of the device and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the drilling anti-spraying and dust removal device according to an embodiment of the utility model. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described in combination with the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.
[0021] like Figure 1 As shown, an embodiment of the utility model discloses a drilling blowout prevention and dust removal device, including a blowout prevention cavity 1, a slag return port 2, a drilling inlet 3, a suction port 4, a slag drop port 5, a spray mechanism 6, a first flange 7, a first sealing gasket 8, a pressure cover 9, a second sealing gasket 10 and a second flange 11.
[0022] A slag return port 2 and a drill inlet 3 connected to the inner cavity are respectively arranged on the front and rear sides of the blowout prevention cavity 1, and the drill rod 12 passes through the blowout prevention cavity 1, the slag return port 2 and the drill inlet 3; an extraction port 4 and a slag drop port 5 connected to the inner cavity are respectively arranged on the upper and lower sides of the blowout prevention cavity 1, and two extraction ports 4 are provided, and the two extraction ports 4 are symmetrically distributed on the left and right sides directly above the slag drop port 5; the extraction port 4 and the air inlet of the gas-water separation device are connected by flange, and can also be connected by a barbed pipe or a thread head; the slag drop port 5 adopts a 6-inch pipe, and the slag drop port 5 and the slag inlet of the gas-water separation device are connected by flange, and can also be connected by a barbed pipe or a thread head.
[0023] The inner ends of the slag return port 2, the drill inlet 3 and the slag drop port 5 are all surrounded by a spray mechanism 6 for wet dust reduction; the spray mechanisms 6 are interconnected and connected to the water inlet joint and the air inlet joint arranged on the outside of the blowout prevention cavity 1. During the drilling operation, the downhole system water and the downhole compressed air are connected to form a water curtain to achieve wet dust reduction and blocking; the spray mechanism 6 adopts an annular tube, on which are provided two rows of spray holes distributed at 30° and 45°.
[0024] The outer end of the slag return port 2 is fixedly connected with a first flange 7, and the drilling anti-blowout dust removal device can be fixedly connected to the hole opening through the first flange 7.
[0025] A concave ring is fixedly connected to the outer side of the blowout prevention cavity 1, a first sealing gasket 8 is arranged inside the concave ring, and a pressure cover 9 is pressed on the outer side of the first sealing gasket 8 and fixedly connected to the concave ring.
[0026] The second sealing gasket 10 is arranged in a groove on the outside of the pressure cover 9, and the second flange 11 is pressed on the outside of the second sealing gasket 10 and fixedly connected to the pressure cover 9; the second flange 11 is composed of two symmetrically separated semi-annular flanges, and the drilling anti-blowout dust removal device can be fixedly connected to the drilling rig through the second flange 11.
[0027] The first sealing gasket 8 and the second sealing gasket 10 are both made of nitrile rubber, which can seal drill cuttings, drill slag and coal dust mixed with gas; the first sealing gasket 8 and the second sealing gasket 10 are arranged concentrically, and the size of the first sealing gasket 8 is larger than that of the second sealing gasket 10;
[0028] The drill inlet 3 is composed of a gland 9 , a second sealing gasket 10 and a second flange 11 . The spray mechanism 6 at the inner end of the drill inlet 3 is arranged between the first sealing gasket 8 and the second sealing gasket 10 .
[0029] Working principle: During soft coal directional drilling, the spray mechanism 6 is connected to the underground system water and underground compressed air. The spray mechanism 6 sprays a water curtain to initially wet and reduce the returned slag and coal dust during construction. A part of the wet large slag flows into the gas-water separation device from the slag outlet 5, and the other part of the floating fine slag and gas mixed with gas is extracted into the gas-water separation device through the extraction port 4, and the slag is further precipitated and dusted in the gas-water separation device to separate the gas.
[0030] Most of the coal dust in the directional drilling site and tunnels is gushing out from the drill inlet 3, which is the most unreliable part for coal dust blocking. During directional drilling operation, the first sealing pad 8 is the first slag blocking and dust reduction measure at the drilling end, the spray mechanism 6 is the second slag blocking and dust reduction measure, and the second sealing pad 10 is the third slag blocking and dust reduction measure. The three slag blocking and dust reduction measures complete more than 85% of the coal dust blocking, realizing the slag blocking and dust reduction effect of the blowout preventer on drill cuttings during soft coal directional drilling operation.
[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A drilling anti-spray dust removal device, characterized in that: The invention comprises a blowout prevention cavity, a slag return port, a drill inlet, a extraction port, a slag drop port and a spray mechanism. The front and rear sides of the blowout prevention cavity are respectively provided with a slag return port and a drill inlet connected to its inner cavity. The upper and lower sides of the blowout prevention cavity are respectively provided with an extraction port and a slag drop port connected to its inner cavity. The inner ends of the slag return port, the drill inlet and the slag drop port are all surrounded by a spray mechanism.
2. The drilling anti-blowout dust removal device according to claim 1 is characterized in that: The spray mechanisms are interconnected and connected to a water inlet joint and an air inlet joint arranged outside the anti-spray cavity.
3. The drilling anti-spray dust removal device according to claim 2 is characterized in that: The spray mechanism adopts an annular tube, on which two rows of spray holes distributed in staggered directions are arranged.
4. The drilling anti-blowout dust removal device according to claim 1 is characterized in that: The outer end of the slag return port is fixedly connected with a first flange.
5. The drilling anti-spray dust removal device according to claim 1 is characterized in that: The drilling anti-blowout dust removal device also includes a first sealing gasket and a pressure cover. The outer side of the anti-blowout cavity is fixedly connected with a concave ring. The first sealing gasket is arranged inside the concave ring. The pressure cover is pressed on the outer side of the first sealing gasket and fixedly connected to the concave ring.
6. The drilling anti-spray dust removal device according to claim 5, characterized in that: The drilling anti-blowout dust removal device also includes a second sealing gasket and a second flange. The second sealing gasket is arranged in a groove on the outer side of the gland, and the second flange is pressed on the outer side of the second sealing gasket and fixedly connected to the gland.
7. The drilling anti-spray dust removal device according to claim 6, characterized in that: The drill inlet is composed of the pressure cover, the second sealing gasket and the second flange, and the spray mechanism at the inner end of the drill inlet is arranged between the first sealing gasket and the second sealing gasket.
8. The drilling anti-blowout dust removal device according to claim 6 is characterized in that: The first sealing gasket and the second sealing gasket are both made of rubber.
9. The drilling anti-blowout dust removal device according to claim 6, characterized in that: The second flange consists of two symmetrically separated semi-annular flanges.
10. The drilling anti-blowout dust removal device according to claim 1, characterized in that: There are two extraction ports, which are symmetrically distributed on the left and right sides of the slag drop port.