Intelligent blowout prevention system for outburst prevention measure drilling in strong outburst coal seam area

Abstract

The utility model discloses an intelligent drilling blowout prevention system for outburst prevention measures in a strong outburst coal seam area, which is characterized in that a drill rod of a drilling machine sequentially penetrates through an intelligent blowout prevention device and an orifice five-way to extend into an orifice, and the orifice five-way is respectively connected with the orifice, two pumping pipes, an inlet of a blowout prevention box and one end of the intelligent blowout prevention device; the other ends of the two pumping and discharging pipes are connected with an extraction gathering pipe, buffering blowout prevention air bags are installed on the pumping and discharging pipes, a pipeline is connected between the extraction gathering pipe and a hole opening, the upper layer of the double-layer gas-water separator is communicated with the extraction gathering pipe, the intelligent blowout prevention device, the blowout prevention box and the slag discharging box through the pipeline, and a water discharging opening is formed in the lower layer of the double-layer gas-water separator. One end of the extraction pipeline is connected with the extraction gathering pipe; and a methane sensor is mounted at one end of the intelligent blowout preventer. According to the utility model, the functions of advanced early warning of spray holes, automatic sealing of the drill rod, automatic regulation and control of negative pressure and the like can be realized, so that the safety is improved, and the normal construction of underground outburst prevention measure drilling is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine construction, especially to a strong outburst coal seam area outburst prevention measure drilling intelligent blowout prevention system. BACKGROUND

[0002] The hole is prone to collapse during the drilling construction of the area outburst prevention measure, causing the phenomenon that the gas in the hole is suddenly blown out. Installing a hole mouth blowout prevention device is an important method to prevent blowout. At present, the drilling construction of coal mine gas extraction generally adopts a single manual supervision mode, and the automatic monitoring degree is low, and gas accidents are prone to occur due to the failure of the implementation of gas control measures. Therefore, the research of an intelligent blowout prevention system capable of realizing prediction, early warning, joint control and extraction promotion is the current work focus. UTILITY MODEL CONTENT

[0003] The utility model discloses a strong outburst coal seam area outburst prevention measure drilling intelligent blowout prevention system, and the utility model discloses can realize the function such as blowout hole early warning, automatic sealing drill rod, automatic control negative pressure, thereby improve security, guarantee the normal construction of the downhole outburst prevention measure drilling.

[0004] The utility model discloses a strong outburst coal seam area outburst prevention measure drilling intelligent blowout prevention system, and the utility model discloses can realize the function such as blowout hole early warning, automatic sealing drill rod, automatic control negative pressure, thereby improve security, guarantee the normal construction of the downhole outburst prevention measure drilling.

[0005] A strong outburst coal seam area outburst prevention measure drilling intelligent blowout prevention system, including drilling machine, intelligent blowout prevention device, hole mouth five pass, extraction pipeline, extraction collection pipe, double layer gas water separator, blowout prevention tank, slag discharge tank, water tank and control system, the drill rod of drilling machine passes through intelligent blowout prevention device, hole mouth five pass in proper order and goes into hole mouth, hole mouth five pass is connected with hole mouth, two extraction and discharge pipes, blowout prevention tank import and intelligent blowout prevention device one end respectively, two extraction and discharge pipes other end are connected with extraction collection pipe, and install buffer blowout air bag on one of extraction and discharge pipes, and the pipeline is connected between extraction collection pipe and hole mouth, the upper layer of double layer gas water separator is passed through pipeline and is communicated with extraction collection pipe, intelligent blowout prevention device, blowout prevention tank and slag discharge tank respectively, and the lower layer of double layer gas water separator is equipped with the water outlet, the one end of extraction pipeline is connected with extraction collection pipe, and the other end is connected with water tank, the one end of intelligent blowout prevention device is installed with methane sensor, and methane sensor is connected with control system, the control system is connected with the control end of intelligent blowout prevention device and drilling machine respectively.

[0006] The control system includes a monitoring substation, a feeder switch, a ring network switch, an electric valve, and a ground control center. The ring network switch is connected to the ground control center and the monitoring substation. The methane sensor, the feeder switch, and the electric valve are connected to the monitoring substation. The feeder switch is connected to the control end of the drilling machine. The electric valve is installed on the high-pressure water pipeline, which is connected to the inlet end of the intelligent blowout prevention device.

[0007] The methane sensor adopts a mine laser methane sensor.

[0008] The advantages of the utility model are: the utility model is provided with mine laser methane sensor, monitoring substation, ring network switch, ground control center and feeder switch etc. can monitor the working condition of drilling machine, intelligent blowout preventer and slagging hole in real time, and the gas concentration of hole, and realizes the functions such as blowout hole advanced early warning, automatic sealing of drill pipe, automatic control of negative pressure according to the above information, the automation function solves the problem of drilling construction measures not in place or sudden blowout hole, ensures the safety of drilling construction;The intelligent blowout preventer of the utility model can realize the blowout sealing function of the exhaust pipe and the drill pipe during the coal mine gas extraction drilling construction;The blowout buffer air bag can control and store the high-pressure gas of the blowout hole, ensure the effectiveness and further improve the safety performance. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the structure schematic diagram of the utility model.

[0010] Figure 2 It is the working principle schematic diagram of the utility model intelligent blowout preventer in pressureless state;

[0011] Figure 3 It is the working principle schematic diagram of the utility model intelligent blowout preventer in pressure state;

[0012] Figure 4 It is the structure schematic diagram of the utility model intelligent blowout preventer;

[0013] Figure 5 It is the sectional view of the utility model intelligent blowout preventer. DETAILED DESCRIPTION

[0014] As Figure 1 The utility model discloses a strong sudden coal seam area outburst prevention measure drilling intelligent blowout preventer system for preventing gas from suddenly spouting from the hole during drilling construction, comprising an intelligent blowout preventer 1, a hole five-way joint 2, a buffer blowout air bag 3, a double-layer gas-water separator 4, a blowout preventer tank 5, a slagging tank 6, a drainage tank 11, an electric valve 13, a feeder switch 15, a ring network switch 17, a methane sensor 8 and a monitoring substation 16.

[0015] The intelligent blowout preventer 1 is used at the hole drilling, can close the drilling in time when gas spouts, prevents and treats gas spouting outward, can also automatically lock according to gas concentration, prevents drill pipe 7 from spouting outward.

[0016] The hole five-way joint 2 is used at the hole, can be connected with the blowout preventer tank 5, the intelligent blowout preventer 1, two Φ108mm exhaust pipes and the hole.

[0017] The buffer blowout prevention air bag 3 is made of high-strength material and can withstand a pressure of 3 MPa. The buffer blowout prevention air bag 3 is wrapped around a Φ108 mm drainage pipe (the wrapped section is perforated) and can store high-pressure gas from the blowout hole, thereby playing a buffering role and preventing a large amount of high-concentration gas from suddenly flowing into the drainage pipeline 12.

[0018] The double-layer gas-water separator 4 is divided into two layers. The upper layer is connected to the Φ108 mm drainage pipe and the Φ325 mm drainage pipeline 10. After the gas enters the double-layer gas-water separator 4, the liquid (water) and impurities (coal slurry and coal residue) enter the lower chamber through gravity settling, and the gas is gathered in the upper chamber, thereby realizing gas-liquid separation. Finally, the liquid and impurities can be discharged from the lower water outlet, and the gas enters the drainage pipe from the upper gas outlet.

[0019] The blowout prevention tank 5 is connected to the orifice five-way valve 2, the double-layer gas-water separator 4, and the residue discharge tank 6 and plays a buffering and storage role, thereby preventing a large amount of gas, water, and coal residue from flowing into the drainage pipeline 12.

[0020] The residue discharge tank 6 is used to store wastewater, coal slurry, and coal residue. The wastewater, coal slurry, and coal residue generated during drilling can be discharged into the residue discharge tank 6 through the system pipeline, thereby ensuring the cleanliness of the drilling site.

[0021] The electric valve 13 can be manually controlled by the drilling personnel.

[0022] The feeder switch 15 is used to connect and disconnect the normal current of the load circuit and can connect and disconnect the abnormal current of the load within a certain time under specified abnormal circuit conditions (such as short circuit) and has a complete set of switch devices with a clear break in the primary circuit.

[0023] The ring network switch 17 is connected to the ground control center 18 and the monitoring substation 16 and can automatically send information to the ground control center 18 for automatic control of the switch.

[0024] The methane sensor 8 is used to monitor and measure the methane concentration of the orifice and send the concentration information to the monitoring substation 16.

[0025] The monitoring substation 16 is used to receive and process the information of the orifice laser sensor and send the information to the feeder switch 15 and the ring network switch 17.

[0026] The ground control center 18 is connected to the monitoring substation 16 through the ring network switch 17.

[0027] The input end of the electric valve 13 is also connected to the high-pressure water pipe 14, and the output end of the electric valve 13 is connected to the intelligent blowout prevention device 1 through the high-pressure water pipe 14.

[0028] The intelligent blowout preventer 1, the orifice five-way 2, the buffer blowout prevention air bag 3, the blowout prevention tank 5, the extraction collection pipe 10 and the extraction pipeline 12 can confine the gas spouted from the orifice to the whole system when the orifice occurs, and prevent the gas concentration around the drilling site.

[0029] The extraction pipeline is provided with an extraction electric control valve, which is used for adjusting the extraction negative pressure state, and the extraction pipeline provides an extraction channel, and in the normal construction state, the extraction electric control valve is partially opened to reduce the extraction negative pressure; in the gas orifice condition, the extraction electric control valve is opened to adjust the extraction negative pressure, and the gas is sucked into the extraction pipeline.

[0030] In actual application, the monitoring substation 16 is connected with the drilling machine 9 through a feed switch 15, which is used for controlling the working state of the drilling machine 9, and the monitoring system of the monitoring substation 16 is used for monitoring the methane sensor 8, which can control the feed switch 15 through the concentration change of the methane sensor 8.

[0031] In actual work, the extraction pipeline is also connected with a drainage tank 11, the extraction pipeline 12 is used for extracting the gas, the blowout prevention tank 5 is used for preventing the coal and gas from spouting to the construction site in the process of drilling orifice, the drilling machine 9 and the drill rod 7 are used for drilling construction, and the monitoring substation 16 can be used for monitoring the working state of the utility model, and the intelligent blowout preventer 1 can realize the blowout sealing function of the orifice five-way 2 and the drill rod 7 in the drilling construction, so that the utility model realizes the automatic monitoring function in the drilling construction process of the outburst prevention measure, solves the accidents caused by the failure of the gas control measure, and improves the safety in the drilling construction process.

[0032] In actual application, when the orifice does not occur, the gas, water and coal slurry enter the orifice five-way 2 from the drilling hole, part of the gas enters the buffer blowout prevention air bag 3 through the extraction pipeline 12 and then enters the Φ325mm extraction collection pipe 10, another part of the double-layer gas enters the gas-water separator 4 and then enters the Φ325mm extraction collection pipe 10, and the water and coal slurry enter the blowout prevention tank 5 through the extraction pipeline 12 and then enter the residue discharge tank 6.

[0033] When the orifice gas concentration is high or the orifice occurs, the monitoring substation 16 can control the feed switch 15, so that the drilling machine 9 stops working, and the intelligent blowout preventer 1 and the orifice five-way 2 are also controlled to be locked to prevent the coal and gas from spouting into the operation space; the buffer blowout prevention air bag 3 can greatly reduce the pressure when the gas spouts and store the pressurized gas therein; after the orifice ends, the pressurized gas can be slowly extracted through the ground control center 18 or the field negative pressure adjustment, so as to prevent a series of problems caused by the orifice.

[0034] When the gas enters the double-layer gas-water separator 4 from the extraction pipeline 12, water can be separated from the gas based on the different densities of different substances, the water flows into the lower layer and is discharged from the water outlet, and the gas enters the extraction pipeline 12 from the upper channel and then enters the Φ325 mm extraction collection pipeline 10.

[0035] As shown in the accompanying drawings Figure 2 It can be seen that, in the pressure-free idle state of the intelligent blowout preventer 1, no high-pressure water causes the internal components to expand, which belongs to the pressure relief and contraction state, and the drilling rig 9 can control the drill pipe 7 to work normally.

[0036] As shown in the accompanying drawings Figure 3 It can be seen that, in the high-pressure sealing state of the intelligent blowout preventer, the high-pressure water pipe 14 can be used to fill high-pressure water (water pressure 2-4 MPa) into the blowout preventer components to expand the internal components of the intelligent blowout preventer 1, so as to block the gap between the drill pipe 7 and the internal components of the intelligent blowout preventer 1, so that the drill pipe 7 cannot continue to drill, and at the same time, the channel for gas emission is blocked.

[0037] As shown in the accompanying drawings Figure 4 , 5 The intelligent blowout preventer 1 comprises a blowout sealing device housing 19, flanges 20 are respectively arranged at both ends of the blowout sealing device housing 19, an annular pressure expansion water bag 21 is arranged in the blowout sealing device housing 19, a high-pressure water inlet 22 and a high-pressure water outlet 23 are respectively arranged on the annular pressure expansion water bag 21, the high-pressure water inlet 22 is connected with the high-pressure water pipe 14, a gas negative pressure extraction pipeline 24 is communicated with the blowout sealing device housing 19, the other end of the gas negative pressure extraction pipeline 24 is communicated with the upper layer of the double-layer gas-water separator 4, a residue discharge port 25 is further arranged at the lower part of the blowout sealing device housing 19, and the drill pipe 7 passes through the inside of the annular pressure expansion water bag 21. In the normal pressure-free idle state, no high-pressure water causes the annular pressure expansion water bag 21 to expand, which belongs to the pressure relief and contraction state, and the drill pipe 7 can work normally; in the high-pressure sealing state, the electric valve 13 is opened, high-pressure water is injected into the inside of the annular pressure expansion water bag 21 through the high-pressure water pipe 14, the water bag is rapidly expanded under pressure, and the drill pipe 7 stops working.

Claims

1. A kind of strong outburst coal seam area outburst prevention measure drilling intelligent blowout preventer system, it is characterized by: The device comprises a drilling machine, an intelligent blowout preventer, an orifice five-way pipe, a pumping pipeline, a pumping collection pipe, a double-layer gas-water separator, a blowout preventer tank, a residue discharge tank, a water discharge tank and a control system, the drill pipe of the drilling machine passes through the intelligent blowout preventer and the orifice five-way pipe into the orifice, the orifice five-way pipe is connected with the orifice, two pumping pipes, the blowout preventer tank and the intelligent blowout preventer, the other ends of the two pumping pipes are connected with the pumping collection pipe, a buffer blowout gas bag is installed on one of the pumping pipes, a pipeline is connected between the pumping collection pipe and the orifice, the upper layer of the double-layer gas-water separator is communicated with the pumping collection pipe, the intelligent blowout preventer, the blowout preventer tank and the residue discharge tank through pipelines, a water outlet is arranged in the lower layer of the double-layer gas-water separator, one end of the pumping pipeline is connected with the pumping collection pipe, and the other end is connected with the water discharge tank, a methane sensor is installed at one end of the intelligent blowout preventer, the methane sensor is connected with the control system, and the control system is also connected with the control end of the drilling machine and the intelligent blowout preventer.

2. The intelligent blowout prevention system for drilling in the outburst prevention measure area of a strong outburst seam zone according to claim 1, characterized in that: The control system comprises a monitoring substation, a feeder switch, a ring network switch, an electric valve and a ground control center, the ring network switch is connected with the ground control center and the monitoring substation, the methane sensor, the feeder switch and the electric valve are connected with the monitoring substation, the feeder switch is connected with the control end of the drilling machine, the electric valve is installed on a high-pressure water pipeline, and the high-pressure water pipeline is connected with the inlet end of the intelligent blowout preventer.

3. The intelligent blowout prevention system for drilling in the outburst prevention measure area of a strong outburst seam zone according to claim 1, characterized in that: The methane sensor is a mine laser methane sensor.

Images