Drilling orifice blowout preventer

Abstract

A drill hole orifice blowout preventer comprises a drill rod and further comprises an orifice bottom bracket arranged on the outer side of a drill hole, and an early warning whistle is arranged at the top of the orifice bottom bracket. The first drainage pipe is connected with the top of the orifice bottom bracket; the second drainage pipe is connected with the top of the orifice five-way joint, a gas collecting box is arranged in the middle of the second drainage pipe, and the tail end of the second drainage pipe is connected with a pneumatic valve; the deslagging pipe is connected with the bottom of the orifice five-way part; the gas-water separator is communicated with the slag discharging pipe, and a water discharging pipe and an air discharging pipe are further communicated with the gas-water separator; the floor drainage device is communicated with the first drainage pipe, the pneumatic valve and the exhaust pipe; the automatic water drainer is communicated with the floor water drainer; and the third-stage filter tank is communicated with the drainage pipe. A blowout prevention early warning whistle and a packing are installed on an orifice five-way joint, a second drainage pipe, a gas collecting box, an automatic water drainage device and the like are additionally arranged, the negative pressure of the second drainage pipe is adjusted through a pneumatic valve on a drilling machine operation table, the gas extraction negative pressure of a drilling hole orifice is increased, and therefore environment gas on the downwind side of a drilling machine is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of blowout prevention at the orifice, and more specifically, to a blowout prevention device for the orifice of a drill hole. Background Art

[0002] During the process of coal mining, the main measure for gas control is the gas drainage from the original coal seam. When a drill hole blows out during the drilling process, it is easy to cause abnormal gas on the downwind side of the drill rig.

[0003] The existing orifice blowout prevention device is connected to a steam-water separator through an orifice five-way joint and a φ108mm coiled pipe, and finally enters the drainage branch pipe in the drill site. When a blowout occurs, a large amount of gas enters the gas-water separator, causing the gas-water separator and the pipeline to bear a large pressure in a short time, which easily leads to unsmooth gas discharge. Content of the Utility Model

[0004] The utility model aims to provide a blowout prevention device for the orifice of a drill hole to overcome the above deficiencies, which can increase the negative pressure of gas drainage at the orifice of the drill hole, thereby reducing the environmental gas on the downwind side of the drill rig.

[0005] A blowout prevention device for the orifice of a drill hole includes a drill pipe, and also includes an orifice five-way joint arranged outside the drill hole. A warning whistle is arranged at the top of the orifice five-way joint; a first drainage pipe connected to the top of the orifice five-way joint; a second drainage pipe connected to the top of the orifice five-way joint. A gas collection box is arranged in the middle of the second drainage pipe, and a pneumatic valve is connected to the end of the second drainage pipe; a slag discharge pipe connected to the bottom of the orifice five-way joint; a gas-water separator communicated with the slag discharge pipe. A drain pipe and an exhaust pipe are also communicated with the gas-water separator; a floor drainer communicated with the first drainage pipe, the pneumatic valve and the exhaust pipe; an automatic drainer communicated with the floor drainer; and a three-stage filter box communicated with the drain pipe.

[0006] Further, a PVC pipe is arranged at the front end of the orifice five-way joint. The PVC pipe is embedded in the coal wall and surrounds the drill pipe.

[0007] Further, the drill pipe penetrates through the front end and the rear end of the orifice five-way joint, and the rear end of the orifice five-way joint is sealed by a packing.

[0008] Further, the first drainage pipe, the second drainage pipe and the slag discharge pipe are all φ108mm coiled pipes.

[0009] Further, the gas collection box is connected to the second drainage pipe through a flange. A first slag discharge port is arranged at the bottom of the gas collection box, and a sealing cap is detachably connected to the first slag discharge port.

[0010] Further, the pneumatic valve is remotely controlled by a computer and can also be controlled manually.

[0011] Further, two partition plates are provided inside the gas-water separator. The partition plates are inclined. The slag discharge pipe communicates with the top of the gas-water separator. The drain pipe communicates with the bottom of the side wall of the gas-water separator. The exhaust pipe communicates with the top of the other side wall of the gas-water separator.

[0012] Further, a gas discharge pipe is also communicated with the top of the floor drainer. The other end of the gas discharge pipe communicates with the main pipeline.

[0013] Further, the floor drainer is located higher than the automatic drainer. A second slag discharge port is provided at the bottom of the floor drainer. A sealing cap is also detachably connected to the second slag discharge port.

[0014] Further, a drainage pump is provided at the end of the three-stage filtration tank.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] ① An anti-blowout warning whistle and packing are installed on the orifice five-way. At the same time, a second gas extraction pipe, a gas collection box, an automatic drainer, etc. are added. According to the gas situation at the orifice of the drilling hole on site, the negative pressure of the second gas extraction pipe is adjusted through the pneumatic valve on the drilling rig console to increase the negative pressure of gas extraction at the orifice of the drilling hole, thereby reducing the environmental gas on the downwind side of the drilling rig. The frequency of abnormal gas on the downwind side caused by problems such as blowout and high pressure during the drilling construction process is effectively reduced. At the same time, the loss of negative pressure during normal drilling can also be effectively controlled, providing equipment guarantee for the reasonable and effective use of extraction negative pressure during the drilling of directional drilling rigs. Description of the Drawings

[0017] The drawings are used to provide further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is an overall structural schematic diagram of a drilling hole orifice anti-blowout device.

[0019] Figure 2 is an exploded view of the rear end of the orifice five-way in a drilling hole orifice anti-blowout device.

[0020] Figure 3 is a schematic diagram of the gas-water separator in a drilling hole orifice anti-blowout device.

[0021] In the figure: 1. Drill pipe; 2. Five-way pipe at the orifice; 21. Warning whistle; 22. PVC pipe; 23. Packing; 24. Protective shell; 3. First gas drainage pipe; 4. Second gas drainage pipe; 41. Gas collection box; 411. First slag discharge port; 42. Pneumatic valve; 5. Slag discharge pipe; 6. Gas-water separator; 61. Drain pipe; 62. Exhaust pipe; 63. Partition board; 7. Floor drainer; 71. Gas discharge pipe; 711. Main pipeline; 72. Second slag discharge port; 8. Automatic drainer; 9. Three-stage filter box; 91. Drainage pump. Specific implementation manner

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] As Figure 1 shown, a blowout prevention device at the orifice of a drill hole includes a drill pipe 1, and also includes a five-way pipe 2 at the orifice arranged outside the drill hole. A warning whistle 21 is provided at the top of the five-way pipe 2 at the orifice; a first gas drainage pipe 3 connected to the top of the five-way pipe 2 at the orifice; a second gas drainage pipe 4 connected to the top of the five-way pipe 2 at the orifice. A gas collection box 41 is provided in the middle of the second gas drainage pipe 4, and a pneumatic valve 42 is connected to the end of the second gas drainage pipe 4; a slag discharge pipe 5 connected to the bottom of the five-way pipe 2 at the orifice; a gas-water separator 6 communicated with the slag discharge pipe 5. A drain pipe 61 and an exhaust pipe 62 are also communicated with the gas-water separator 6; a floor drainer 7 communicated with the first gas drainage pipe 3, the pneumatic valve 42 and the exhaust pipe 62; an automatic drainer 8 communicated with the floor drainer 7; and a three-stage filter box 9 communicated with the drain pipe 61.

[0024] A PVC pipe 22 is provided at the front end of the five-way pipe 2 at the orifice. The PVC pipe 22 is embedded in the coal wall and surrounds the drill pipe 1. When drilling, the PVC pipe 22 is fitted to the drill hole. The gas generated during drilling enters the five-way pipe 2 at the orifice from the PVC pipe 22, avoiding a large amount of gas leakage.

[0025] As Figure 2 shown, the drill pipe 1 penetrates through the front end and the rear end of the five-way pipe 2 at the orifice. The rear end of the five-way pipe 2 at the orifice is sealed by a packing 23. The packing 23 fits the inner wall of the rear end of the five-way pipe 2 at the orifice and the outer wall of the drill pipe 1. When the drill pipe 1 rotates, it rubs against the packing 23. A protective shell 24 is also screwed outside the five-way orifice. The protective shell 24 prevents the packing 23 from slipping out of the rear end of the five-way orifice. The packing 23 prevents gas from flowing out of the rear end of the five-way pipe 2 at the orifice. At the same time, compared with the commonly used red leather gasket for sealing, the wear resistance of the packing 23 is significantly enhanced, reducing the number of times of replacing the sealing parts and improving the work efficiency.

[0026] The first gas drainage pipe 3, the second gas drainage pipe 4 and the slag discharge pipe 5 are all φ108mm serpentine pipes. The serpentine pipes are flexible and easy to bend. Using serpentine pipes can more conveniently move the positions of each component, facilitating better layout and maintenance of each component.

[0027] The warning whistle 21 is located behind the first gas drainage pipe 3 and the second gas drainage pipe 4, and the warning whistle 21 is internally connected to the orifice five-way pipe 2. During normal drilling operations, the concentration, flow rate and quantity of gas are small, and the gas can be discharged from the first gas drainage pipe 3 into the floor drainer 7. At this time, the pressure of the gas is not sufficient to sound the warning whistle 21, and the coal slag and water entering from the orifice five-way pipe 2 can directly flow into the lower slag discharge pipe 5 by gravity; when a blowout occurs, a large amount of gas quickly enters the orifice five-way pipe 2. At this time, the pressure of the gas sounds the warning whistle 21, prompting the operator to perform a series of operations to deal with the blowout.

[0028] Before a blowout occurs, the pneumatic valve 42 is in the closed state, and the second gas drainage pipe 4 is in the non-operating state. After a blowout occurs, the pneumatic valve 42 is opened to connect the second gas drainage pipe 4 with the floor drainer 7.

[0029] The gas collection box 41 is connected to the second gas drainage pipe 4 by a flange. A large amount of gas can be stored in the gas collection box 41. After a blowout occurs, gas enters the first gas drainage pipe 3 and the second gas drainage pipe 4 simultaneously. At the same time, after a large amount of gas enters the gas collection box 41, its volume expands, and the gas diffuses in the gas collection box 41, reducing the pressure and flow rate of the gas, reducing the pressure of the gas discharged by the floor drainer 7, reducing the equipment loss caused by the blowout, and at the same time reducing the possibility of gas overflow.

[0030] The bottom of the gas collection box 41 is provided with a first slag discharge port 411, and a sealing cap is detachably connected to the first slag discharge port 411. After the gas brings some water and coal slag into the gas collection box 41 during a blowout, the power weakens and it no longer moves in the gas collection box 41. When overhauling, the sealing cap is opened, and the water and coal slag flow out from the first slag discharge port 411 under the action of gravity.

[0031] The pneumatic valve 42 is remotely controlled by a computer in the drilling rig console or can also be controlled manually. The pneumatic valve 42 is opened after the warning whistle 21 sounds.

[0032] Such as Figure 3As shown in the figure, there are two partition plates 63 inside the gas-water separator 6. The partition plates 63 are inclined. The two partition plates 63 divide the interior of the gas-water separator 6 into a Z-shaped channel. The slag discharge pipe 5 is connected to the top of the gas-water separator 6, the drain pipe 61 is connected to the bottom of the side wall of the gas-water separator 6, and the exhaust pipe 62 is connected to the top of the other side wall of the gas-water separator 6. When water and coal slag enter the slag discharge pipe 5, a part of the gas will be entrained. When the coal slag and water enter the gas-water separator 6, the two partition plates 63 slow down and buffer the water and coal slag, and the entrained gas floats out. The water and coal slag flow into the three-stage filtration tank 9 from the bottom drain pipe 61, and the gas floats upward and enters the exhaust pipe 62 and further enters the floor drainer 7.

[0033] The floor drainer 7 collects the gas and part of the water in the first gas extraction pipe 3, the second gas extraction pipe 4 and the exhaust pipe 62. There is also a gas discharge pipe 71 connected to the top of the floor drainer 7. The other end of the gas discharge pipe 71 is connected to the main pipe 711. The main pipe 711 is a pipe with a diameter of 427 mm. The main pipe 711 is used to discharge the gas to the outside. The gas entering the floor drainer 7 floats into the main pipe 711 from the gas discharge pipe 71.

[0034] The floor drainer 7 is higher than the automatic drainer 8. The water in the floor drainer 7 enters the automatic drainer and is discharged. The automatic drainer 8 uses an instrument in the existing technology. There is a second slag discharge port 72 at the bottom of the floor drainer 7. A sealing cap is also detachably connected to the second slag discharge port 72. Opening the sealing cap can discharge the coal slag entering the floor drainer 7.

[0035] The three-stage filtration tank 9 is used to separate the water and coal slag in the gas-water separator 6. There is a drainage pump 91 at the end of the three-stage filtration tank 9. The drainage pump 91 discharges the water in the three-stage filtration tank 9 to the outside, and the coal slag is cleaned regularly manually.

[0036] An anti-blowout warning whistle 21 and a packing 23 are installed on the orifice five-way 2. At the same time, the second gas extraction pipe 4, the gas collection box 41, the automatic drainer 8, etc. are added. According to the gas situation at the orifice of the drilled hole on site, the negative pressure of the second gas extraction pipe 4 is adjusted through the pneumatic valve 42 on the drilling rig console, increasing the negative pressure of the gas extraction at the orifice of the drilled hole, thereby reducing the environmental gas on the downwind side of the drilling rig. It effectively reduces the frequency of abnormal gas on the downwind side caused by problems such as blowout and high pressure during the drilling construction process. At the same time, it can also effectively control the loss of the gas extraction negative pressure during normal drilling, providing equipment guarantee for the reasonable and effective use of the gas extraction negative pressure during the directional drilling rig drilling.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A blowout preventer device for the orifice of a drill hole, comprising a drill pipe (1), characterized in that: It also includes a five-way orifice (2) provided outside the drill hole, and a warning whistle (21) is provided at the top of the five-way orifice (2); a first drainage pipe (3) connected to the top of the five-way orifice (2); a second drainage pipe (4) connected to the top of the five-way orifice (2), a gas collection box (41) is provided in the middle of the second drainage pipe (4), and a pneumatic valve (42) is connected to the end of the second drainage pipe (4); a slag discharge pipe (5) connected to the bottom of the five-way orifice (2); a gas-water separator (6) communicated with the slag discharge pipe (5), and a drain pipe (61) and an exhaust pipe (62) are also communicated with the gas-water separator (6); a floor drainer (7) communicated with the first drainage pipe (3), the pneumatic valve (42) and the exhaust pipe (62); an automatic drainer (8) communicated with the floor drainer (7); and a three-stage filter box (9) communicated with the drain pipe (61).

2. The blowout preventer device for the orifice of a borehole according to claim 1, characterized in that: A PVC pipe (22) is provided at the front end of the five-way orifice (2), the PVC pipe (22) is embedded in the coal wall, and the PVC pipe (22) surrounds the drill pipe (1).

3. The blowout preventer device for the drilling hole orifice according to claim 2, characterized in that: The drill pipe (1) penetrates through the front end and the rear end of the five-way orifice (2), and the rear end of the five-way orifice (2) is sealed by a packing (23).

4. The blowout preventer device for the drilling hole orifice according to claim 3, characterized in that: The first drainage pipe (3), the second drainage pipe (4) and the slag discharge pipe (5) are all φ108mm serpentine pipes.

5. The blowout preventer device for a borehole orifice according to claim 4, characterized in that: The gas collection box (41) is connected to the second drainage pipe (4) by a flange, a first slag discharge port (411) is provided at the bottom of the gas collection box (41), and a sealing cap is detachably connected to the first slag discharge port (411).

6. The blowout preventer device for the orifice of a borehole according to claim 5, characterized in that: The pneumatic valve (42) is remotely controlled by a computer and can also be controlled manually.

7. The blowout preventer device for the orifice of a borehole according to claim 6, characterized in that: Two partition plates (63) are provided in the gas-water separator (6), the partition plates (63) are inclined, the slag discharge pipe (5) is communicated with the top of the gas-water separator (6), the drain pipe (61) is communicated with the bottom of the side wall of the gas-water separator (6), and the exhaust pipe (62) is communicated with the top of the other side wall of the gas-water separator (6).

8. The blowout preventer device for a borehole orifice according to claim 7, characterized in that: A gas discharge pipe (71) is also communicated with the top of the floor drainer (7), and the other end of the gas discharge pipe (71) is communicated with a main pipe (711).

9. The blowout preventer device for the orifice of a drilling hole according to claim 8, wherein: The floor drainer (7) is higher than the automatic drainer (8), a second slag discharge port (72) is provided at the bottom of the floor drainer (7), and a sealing cap is also detachably connected to the second slag discharge port (72).

10. A blowout preventer device for a drilling orifice, according to claim 9, characterized in that: A drainage pump (91) is provided at the end of the three-stage filter box (9).

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