A pneumatic follow-up pipe drilling anti-blowout and anti-dust slag water separation device

Abstract

The present invention discloses a pneumatic tube drilling anti-blowout and dust-proof slag-water separation device, which includes an anti-blowout and dust-proof device and a slag-water separation device. The anti-blowout and dust-proof device of the present invention is used to prevent rock cuttings, rock powder or groundwater from spraying out along the gap between the drill rod and the casing of the pneumatic tube drilling rig; the slag-water separation device collects rock cuttings and rock powder discharged from drilling construction above the aquifer, and quickly separates rock cuttings and groundwater in the aquifer construction. By opening and closing the valve at the discharge end of the material pipe, the slag-water separation device can switch between two operating modes. When the valve is closed, the slag-water separation device collects rock cuttings and rock powder during drilling construction above the aquifer. When the valve is opened during drilling construction in the aquifer, the slag-water separation device quickly separates the discharged rock cuttings from the groundwater. The above combined structure jointly achieves the technical effects of pneumatic tube drilling anti-blowout and dust-proof and slag-water separation.

Description

Technical Field

[0001] The invention relates to the technical field of environmental pollution status investigation, in particular to a pneumatic pipe drilling anti-blowout and anti-dust slag water separation device. Background Art

[0002] At present, in the process of groundwater sampling investigation for pollution status investigation, it is necessary to build groundwater monitoring wells. In gravel or hard bedrock formations, pneumatic follow-up drilling equipment such as down-the-hole hammer drills are usually used for drilling construction. During the drilling construction process, contaminated underground rock cuttings, rock powder and groundwater will be sprayed out along the gap between the drill rod and the casing of the drilling rig. Before drilling into the aquifer, most of the ejected rock cuttings and dust are ejected. After drilling into the aquifer, underground rock cuttings and groundwater are ejected. The above situation will cause secondary pollution to the surrounding environment and damage the health of surrounding personnel. It is also necessary to quickly separate the discharged rock cuttings and groundwater on site for classified disposal. Summary of the invention

[0003] In order to overcome the shortcomings of underground drilling devices in the background technology, the present invention provides a pneumatic pipe drilling anti-blowout and anti-dust and slag water separation device.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a pneumatic pipe drilling anti-blowout and anti-dust slag water separation device, including a blowout prevention device and a separation device;

[0005] The blowout prevention device comprises a blowout prevention sleeve, a barrier rubber pad and a blowout prevention pressure block. The inner wall of the blowout prevention sleeve is provided with an annular pedestal, and a bypass slag discharge pipe is provided on the side wall below the pedestal. Two screw and nut assemblies for connecting and fixing the blowout prevention pressure block are symmetrically hinged on the outer wall of the blowout prevention sleeve;

[0006] The square blowout prevention block is provided with a drill rod hole and a pressure ring on the bottom surface. Two U-shaped openings for connecting the screw and nut assembly are symmetrically provided on both sides of the blowout prevention block.

[0007] The tubular barrier rubber pad is arranged on the support platform in the blowout prevention casing, the pressure ring on the bottom surface of the blowout prevention pressure block is inserted into the blowout prevention casing from above and presses the barrier rubber pad, and the two screw nut assemblies on the outer wall of the blowout prevention casing are respectively connected to the two U-shaped openings of the blowout prevention pressure block;

[0008] The separation device includes a material pipe, a collection tank and a dust removal filter bag. The tank opening at the top of the collection tank is connected to the bottom of the material pipe. A water filter baffle is provided in the material pipe, and the lower edge of the water filter baffle is flush with the edge of the right tank opening of the collection tank. A valve is provided on the discharge end of the material pipe located on the right side of the water filter baffle. The dust removal filter bag is arranged in the collection tank, and the bag opening of the dust removal filter bag is sleeved with the tank opening of the collection tank. A slag discharge door is provided on the side wall of the cuttings collection tank.

[0009] The bypass slag discharge pipe of the blowout prevention device is connected to the feed end of the material pipe of the separation device through a flexible pipeline.

[0010] Furthermore, the flexible pipe is connected to the bypass slag discharge pipe and the material pipe via a clamp connector, and the clamp connector can quickly and reliably connect the pipes.

[0011] Furthermore, the barrier rubber pad is made of elastic rubber material, and its inner wall is provided with an annular boss for strengthening the sealing. The barrier rubber pad made of elastic rubber material can be deformed appropriately under the pressure of the pressure ring of the blowout prevention pressure block, thereby sealing the gap between the drill pipe of the drilling rig and the blowout prevention casing. The annular boss strengthens the blocking and sealing effect. At the same time, when the drilling rig is working, no large friction will be generated between the drill pipe and the drill pipe.

[0012] Furthermore, the width of the U-shaped opening is greater than the screw diameter of the screw-nut assembly and less than the minimum peripheral width of the nut, thereby achieving stable connection strength and facilitating rapid disassembly and assembly of the device.

[0013] Furthermore, the outer diameter of the barrier rubber pad is smaller than the blowout preventer casing, and the inner diameter is greater than or equal to the outer diameter of the drill pipe of the matching drilling rig, which facilitates the installation of the barrier rubber pad on the blowout preventer casing and effectively blocks the gap between the drill pipe of the sealed drilling rig and the surrounding areas and the blowout preventer casing. At the same time, no large friction will be generated when the drilling rig is working, and no impact will be exerted on the drilling construction.

[0014] Furthermore, the water filter partition is provided with strip holes arranged in a vertical direction. The strip holes are arranged in a vertical direction to facilitate the passage of groundwater, are not easily clogged, and have a good filtering effect.

[0015] Furthermore, the upper portion of the water filter baffle is inclined toward the mouth of the collection tank, so that the rock debris falls into the collection tank due to gravity and will not adhere to and accumulate on the water filter baffle, making it less likely to become blocked.

[0016] Furthermore, a zipper seal is provided at the bottom of the dust filter bag to facilitate the removal and disposal of dust collected in the dust filter bag.

[0017] Furthermore, the collection tank is provided with an observation window and a tank vent hole, so that the remaining capacity inside the collection tank can be observed at any time, which is convenient for timely disposal of rock cuttings, and it is also possible to directly observe whether drilling has reached the aquifer. The tank vent hole is used to exhaust gas inside the tank.

[0018] Furthermore, an annular connecting groove for connecting the dust filter bag is provided in the tank mouth of the collection tank, so that the dust filter bag can be firmly connected to the tank mouth of the collection tank.

[0019] Implementation process: During the drilling construction of groundwater monitoring wells, the drill pipe casing of the pneumatic follow-up drilling equipment is first fixed, and the blowout prevention casing is connected to the drill pipe casing. Generally, flange connection or casing connection is adopted. The drill pipe of the pneumatic follow-up drilling equipment is passed through the drill pipe holes of the barrier rubber pad and the blowout prevention pressure block in turn, and then inserted into the blowout prevention casing. The tubular barrier rubber pad is placed on the pedestal in the blowout prevention casing, and the pressure ring of the blowout prevention pressure block is inserted into the blowout prevention casing from above and presses the barrier rubber pad. The two screw and nut assemblies on the outer wall of the blowout prevention casing are respectively connected to the two U-shaped openings of the blowout prevention pressure block, and the nuts of the screw and nut assemblies are tightened. The barrier rubber pad is slightly deformed under the pressure of the pressure ring of the blowout prevention pressure block to close the gap between the drill pipe of the drilling rig and the blowout prevention casing.

[0020] Connect the bypass slag discharge pipe of the blowout preventer and the material pipe of the separation device through a flexible pipe, and first close the valve on the discharge end of the material pipe.

[0021] Start the drilling rig and drill the drill rod downward. Before drilling into the aquifer, underground rock cuttings and dust will enter the separation device along the bypass slag discharge pipe on the side wall of the blowout preventer casing. Since the valve on the discharge end of the material pipe is in a closed state, the rock cuttings and dust are blocked by the water filter baffle and then enter the dust filter bag in the collection tank for storage.

[0022] After drilling into the aquifer through the observation window, the dust removal filter bag can be taken out by opening the slag discharge door during the interval of replacing the drill rod, and the collected materials can be centrally processed; after entering the aquifer during the drilling process, the valve at the discharge end of the material pipe is opened, and the underground rock cuttings and groundwater enter the separation device along the bypass slag discharge pipe provided on the side wall of the blowout prevention casing, and the groundwater is discharged through the water filter baffle, and the rock cuttings are blocked by the water filter baffle and fall into the collection tank for centralized collection. The collection tank is provided with an observation window, and the remaining capacity inside the rock cutting collection tank can be observed at any time, which is convenient for timely disposal of the collected rock cuttings.

[0023] The beneficial effect of the present invention is that the blowout prevention device is used to prevent underground rock cuttings and groundwater from being sprayed out along the gap between the drill pipe and the casing of the pneumatic pipe drilling rig, and the separation device collects the dust discharged from the drilling construction above the aquifer, and quickly separates the rock cuttings and groundwater in the aquifer construction. The blowout prevention device uses the pressure ring of the blowout prevention pressure block to insert into the blowout prevention casing from above and press the barrier rubber pad. The barrier rubber pad is slightly deformed under the pressure of the pressure ring of the blowout prevention pressure block, closing the gap between the drill pipe of the drilling rig and the blowout prevention casing, effectively preventing dust, underground rock cuttings and groundwater from being sprayed vertically along the drill pipe of the drilling rig.

[0024] The separation device is switched to two working modes, dust removal and slag-water separation, through a valve. The dust removal filter bag is used to filter the dust generated during construction above the aquifer, which can effectively eliminate dust pollution containing pollutants. The collection tank is connected to the material pipe. A water filter baffle is provided in the material pipe. The lower edge of the water filter baffle is flush with the right tank mouth edge of the collection tank. The rock cuttings discharged from the aquifer drilling construction can be quickly separated from the groundwater.

[0025] By opening and closing the valve at the discharge end of the material pipe, the separation device can switch between two operating modes. When the valve is closed, the separation device can collect dust during drilling construction above the aquifer. When the valve is opened during drilling construction in the aquifer, the separation device can quickly separate the discharged rock cuttings and groundwater.

[0026] The inner wall of the barrier rubber pad in the blowout preventer is provided with an annular boss, which can maintain a good blocking and sealing effect while reducing the friction between the drill pipe during drilling.

[0027] The water filter baffle is provided with strip holes arranged in a vertical direction. The strip holes are arranged in a vertical direction to facilitate the passage of groundwater, are not easy to be blocked, and have a good filtering effect.

[0028] The water filter baffle is arranged so that its upper part is inclined toward the mouth of the collection tank, so that the rock chips fall into the collection tank due to gravity and will not adhere to and accumulate on the water filter baffle, and it is not easy to be blocked.

[0029] When used in construction on polluted land, this device can effectively prevent the emission of polluted dust around the drill rod of the drilling rig, which may cause air pollution and inhalation hazards to personnel. When constructing on geothermal wells, it can prevent the occurrence of high-temperature groundwater that may cause harm to ground personnel. The separation device can quickly separate the slag and water during the drilling process and centrally treat the pollutant solids. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the device of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the blowout prevention device of the present invention;

[0032] Figure 3 It is a schematic diagram of the implementation of the present invention;

[0033] Figure 4 It is a schematic diagram of the inclined arrangement of the water filtering baffle of the separation device of the present invention.

[0034] Parts and numbers in the picture:

[0035] 1-blowout prevention device; 2-separation device; 3-flexible pipeline; 101-blowout prevention casing; 102-barrier rubber pad; 103-blowout prevention pressure block; 111-cap; 112-bypass slag discharge pipe; 113-screw nut assembly; 131-drill rod hole; 132-pressure ring; 133-U-shaped opening; 201-material pipe; 202-collection tank; 203-dust filter bag; 211-water filter baffle; 222-valve; 221-slag discharge door; 152-annular boss; 213-strip hole; 233-observation window; 244-annular connecting groove; 255-tank exhaust hole; 300-drill rod casing; 400-drill rod. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] like Figures 1 to 4 As shown, a pneumatic pipe drilling anti-blowout and dust and slag water separation device comprises a blowout prevention device 1 and a separation device 2;

[0038] The blowout prevention device 1 comprises a blowout prevention sleeve 101, a barrier rubber pad 102 and a blowout prevention pressure block 103. The inner wall of the blowout prevention sleeve 101 is provided with an annular base 111. The blowout prevention sleeve 101 is provided with a bypass slag discharge pipe 112 on the side wall below the base 111. Two screw and nut assemblies 113 are symmetrically hinged on the outer wall of the blowout prevention sleeve 101.

[0039] The square blowout prevention block 103 is provided with a drill rod hole 131 and a pressure ring 132 on the bottom surface. Two U-shaped openings 133 for connecting the screw and nut assembly 113 are symmetrically provided on both sides of the blowout prevention block 103.

[0040] The tubular barrier rubber pad 102 is arranged on the base 111 in the blowout prevention sleeve 101, the pressure ring 132 on the bottom surface of the blowout prevention pressure block 103 is inserted into the blowout prevention sleeve 101 from above and presses the barrier rubber pad 102, and the two screw nut assemblies 113 on the outer wall of the blowout prevention sleeve 101 are respectively connected to the two U-shaped openings 133 of the blowout prevention pressure block 103;

[0041] The separation device 2 includes a material pipe 201, a collection tank 202 and a dust removal filter bag 203. The tank opening at the top of the collection tank 202 is connected to the bottom of the material pipe 201. A water filter baffle 211 is provided in the material pipe 201. The lower edge of the water filter baffle 211 is flush with the edge of the right tank opening of the collection tank 202. A valve 222 is provided on the discharge end of the material pipe 201 located on the right side of the water filter baffle 211. The dust removal filter bag 203 is arranged in the collection tank 202. The bag opening of the dust removal filter bag 203 is connected with the tank opening of the collection tank 202. A slag discharge door 221 is provided on the side wall of the collection tank 202.

[0042] The bypass slag discharge pipe 112 of the blowout prevention device 1 is connected to the feed end of the material pipe 201 of the separation device 2 through a flexible pipe 3 .

[0043] The flexible pipe 3 is connected to the bypass slag discharge pipe 112 and the material pipe 201 through a clamp connector, and the clamp connector can quickly and reliably connect the pipes.

[0044] The barrier rubber pad 102 is made of elastic rubber material, and its inner wall is provided with an annular boss 152 for strengthening the sealing. The barrier rubber pad 102 made of elastic rubber material can be deformed appropriately under the pressure of the pressure ring 132 of the anti-blowout pressure block 103, and close the gap between the drill pipe of the drilling rig and the anti-blowout casing 101. The annular boss 152 strengthens the blocking and sealing effect. At the same time, when the drilling rig is working, no large friction will be generated between the drill pipe and the drill pipe.

[0045] The width of the U-shaped opening 133 is greater than the screw diameter of the screw-nut assembly 113 and less than the minimum peripheral width of the nut, thereby achieving stable connection strength and facilitating rapid assembly and disassembly of the device.

[0046] The outer diameter of the barrier rubber pad 102 is smaller than the blowout-proof casing 101, and the inner diameter is greater than or equal to the outer diameter of the drill pipe of the matching drilling rig, so that the barrier rubber pad 102 is easy to be installed on the blowout-proof casing 101, and effectively blocks the gap between the drill pipe of the sealed drilling rig and the surrounding areas and the blowout-proof casing 101. At the same time, no large friction will be generated when the drilling rig is working, and no impact will be exerted on the drilling construction.

[0047] The water filtering baffle 211 is provided with strip holes 213 arranged in a vertical direction. The strip holes are arranged in a vertical direction to facilitate the passage of groundwater, are not easily blocked, and have a good filtering effect.

[0048] like Figure 4 The upper part of the water filtering baffle 211 is tilted toward the mouth of the collection tank 202, so that the rock debris falls into the collection tank 202 due to gravity, and will not adhere to and accumulate on the water filtering baffle 211, and is not prone to clogging.

[0049] The bottom of the dust filter bag 203 is provided with a zipper seal to facilitate the removal and processing of the dust collected in the dust filter bag 203.

[0050] The collection tank 202 is provided with an observation window 233 and a tank exhaust hole 255, so that the remaining capacity of the collection tank 202 can be observed at any time, which is convenient for timely disposal of rock cuttings, and can also directly observe whether drilling has reached the aquifer. The tank exhaust hole 255 is used to exhaust and reduce pressure in the tank.

[0051] An annular connecting groove 244 for connecting the dust filter bag 203 is provided in the tank opening of the collection tank 202 , so that the dust filter bag 203 can be firmly connected to the tank opening of the collection tank 202 .

[0052] Implementation process: Figure 3 As shown, during the construction of groundwater monitoring well drilling, the drill pipe casing 300 of the pneumatic follow-up drilling equipment is first fixed, and the blowout prevention casing 1 is connected to the drill pipe casing 300, generally by flange connection or casing connection, and the drill pipe 400 of the pneumatic follow-up drilling equipment is passed through the drill pipe hole 131 of the barrier rubber pad 102 and the blowout prevention pressure block 103 and then into the blowout prevention casing 101, and the tubular barrier rubber pad 102 is placed on the base 111 in the blowout prevention casing 101, and the blowout prevention The pressure ring 132 of the pressure block 103 is inserted into the blowout prevention casing 101 from above and presses the barrier rubber pad 102. The two screw and nut assemblies 113 on the outer wall of the blowout prevention casing 101 are respectively connected to the two U-shaped openings 133 of the blowout prevention pressure block 103. The nuts of the screw and nut assemblies 113 are tightened, and the barrier rubber pad 102 is slightly deformed under the pressure of the pressure ring 132 of the blowout prevention pressure block 103, thereby closing the gap between the drill pipe 400 of the drilling rig and the blowout prevention casing 101.

[0053] The bypass slag discharge pipe 112 of the blowout prevention device 1 and the material pipe 201 of the separation device 2 are connected through the flexible pipe 3, and the valve 222 on the discharge end of the material pipe 201 is closed first.

[0054] The drill rod 400 of the drilling rig is started to drill downward. Before drilling into the aquifer, underground rock cuttings and dust will enter the separation device 2 along the bypass slag discharge pipe 112 provided on the side wall of the blowout prevention casing 101. Since the valve 222 on the discharge end of the material pipe 201 is in a closed state, the rock cuttings and dust are blocked by the water filter baffle 211 and then enter the dust filter bag 203 in the collection tank 202 for storage.

[0055] After drilling into the aquifer, the observation window 233 is used to observe that the dust filter bag 203 can be removed by opening the slag discharge door 221 during the interval between drill rod replacements, and the collected materials can be centrally processed; after entering the aquifer, the valve 222 at the discharge end of the material pipe 201 is opened, and the underground rock cuttings and groundwater enter the separation device 2 along the bypass slag discharge pipe 112 provided on the side wall of the blowout prevention casing 101, and the groundwater passes through the water filter baffle 211 and is discharged from the discharge end of the material pipe 201, and the rock cuttings are blocked by the water filter baffle 211 and fall into the dust filter bag 203 of the collection tank 202 for collection. The dust filter bag 203 is air-permeable and water-permeable, and the pressurized air generated during the drilling process is discharged through the tank exhaust hole 255; the observation window 233 is provided on the collection tank 202, and the remaining capacity inside the collection tank 202 can be observed at any time, so as to facilitate timely disposal of the rock cuttings collected by the dust filter bag 203.

[0056] The separation device 2 is switched to two working modes, dust removal and slag-water separation, through a valve 222. The dust removal filter bag 203 is used to filter the dust generated during construction above the aquifer, which can effectively eliminate dust pollution containing pollutants in the polluted strata. The collection tank 202 is connected to the material pipe 201. A water filter baffle 211 is provided in the material pipe 201. The lower edge of the water filter baffle 211 is flush with the edge of the right tank mouth of the collection tank 202, which can quickly separate the rock cuttings discharged from the aquifer drilling construction from the groundwater.

[0057] Finally, it should be noted that 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 pneumatic pipe drilling anti-blowout and anti-dust slag water separation device, characterized in that: It comprises a blowout prevention device (1) and a separation device (2); The blowout prevention device (1) comprises a blowout prevention sleeve (101), a barrier rubber pad (102) and a blowout prevention pressure block (103); the inner wall of the blowout prevention sleeve (101) is provided with an annular support platform (111); the side wall of the blowout prevention sleeve (101) below the support platform (111) is provided with a bypass slag discharge pipe (112); and the outer wall of the blowout prevention sleeve (101) is symmetrically hinged with two screw nut assemblies (113); A drill rod hole (131) is provided on the square anti-blowout pressure block (103), a pressure ring (132) is provided on the bottom surface, and two U-shaped openings (133) for connecting the screw and nut assembly (113) are symmetrically provided on both sides of the anti-blowout pressure block (103); A tubular barrier rubber pad (102) is arranged on a support platform (111) in the anti-blowout sleeve (101); a pressure ring (132) on the bottom surface of the anti-blowout pressure block (103) is inserted into the anti-blowout sleeve (101) from above and presses the barrier rubber pad (102); two screw nut assemblies (113) on the outer wall of the anti-blowout sleeve (101) are respectively connected to two U-shaped openings (133) of the anti-blowout pressure block (103); The separation device (2) comprises a material pipe (201), a collection tank (202) and a dust removal filter bag (203); the tank opening at the top of the collection tank (202) is connected to the bottom of the material pipe (201); a water filter baffle (211) is provided in the material pipe (201); the lower edge of the water filter baffle (211) is flush with the edge of the right tank opening of the collection tank (202); a valve (222) is provided on the discharge end of the material pipe (201) located on the right side of the water filter baffle (211); the dust removal filter bag (203) is arranged in the collection tank (202); the bag opening of the dust removal filter bag (203) is sleeved with the tank opening of the collection tank (202); and a slag discharge door (221) is provided on the side wall of the collection tank (202); The bypass slag discharge pipe (112) of the blowout prevention device (1) is connected to the feed end of the material pipe (201) of the separation device (2) via a flexible pipe (3); The flexible pipe (3) is connected to the bypass slag discharge pipe (112) and the material pipe (201) via a clamp connector; The barrier rubber pad (102) is made of elastic rubber material, and its inner wall is provided with an annular boss (152) for strengthening the seal; The width of the U-shaped opening (133) is greater than the screw diameter of the screw-nut assembly (113) and smaller than the minimum outer circumference width of the nut; The outer diameter of the barrier rubber pad (102) is smaller than the blowout prevention casing (101), and the inner diameter is greater than or equal to the outer diameter of the drill pipe of the matching drilling rig; The water filtering baffle (211) is provided with strip-shaped holes (213) arranged in a vertical direction; The upper portion of the water filtering baffle (211) is arranged to be inclined toward the tank opening of the collection tank (202); The bottom of the dust removal filter bag (203) is provided with a zipper seal; The collection tank (202) is provided with an observation window (233) and a tank exhaust hole (255); An annular connecting groove (244) for connecting to the dust filter bag (203) is provided in the tank opening of the collection tank (202); In the construction of drilling a groundwater monitoring well, the drill pipe casing of the pneumatic follow-up drilling equipment is first fixed, and the blowout prevention casing (101) is connected to the drill pipe casing. The drill pipe of the pneumatic follow-up drilling equipment is passed through the drill pipe hole (131) of the barrier rubber pad (102) and the blowout prevention pressure block (103) in turn and then inserted into the blowout prevention casing (101). The tubular barrier rubber pad (102) is placed on the support (111) in the blowout prevention casing (101), and the pressure of the blowout prevention pressure block (103) is pressed. The ring (132) is inserted into the blowout prevention sleeve (101) from above and presses the barrier rubber pad (102). The two screw nut assemblies (113) on the outer wall of the blowout prevention sleeve (101) are respectively connected to the two U-shaped openings (133) of the blowout prevention pressure block (103). The nuts of the screw nut assemblies (113) are tightened. The barrier rubber pad (102) is slightly deformed under the pressure of the pressure ring (132) of the blowout prevention pressure block (103), thereby sealing the gap between the drill pipe of the drilling rig and the blowout prevention sleeve (101). Connecting the bypass slag discharge pipe (112) of the blowout prevention device (1) and the material pipe (201) of the separation device (2) through a flexible pipe (3), and first closing the valve (222) on the discharge end of the material pipe (201); The drilling rig drill rod is started to drill downward. Before drilling into the aquifer, underground rock cuttings and dust will enter the separation device (2) along the bypass slag discharge pipe (112) provided on the side wall of the blowout prevention casing (101). Since the valve (222) on the discharge end of the material pipe (201) is in a closed state, the rock cuttings and dust are blocked by the water filter baffle (211) and enter the dust removal filter bag (203) in the collection tank (202) for storage; After drilling into the water-bearing layer through the observation window (233), the slag discharge door (221) can be opened to take out the dust filter bag (203) during the interval between replacing the drill rod, and the collected materials can be centrally processed; After entering the aquifer during the drilling process, the valve (222) at the discharge end of the material pipe (201) is opened, and underground rock cuttings and groundwater enter the separation device (2) along the bypass slag discharge pipe (112) provided on the side wall of the blowout prevention casing (101), and the groundwater is discharged through the water filter baffle (211), and the rock cuttings are blocked by the water filter baffle (211) and fall into the collection tank (202) for centralized collection; the collection tank (202) is provided with an observation window (233), so that the remaining capacity inside the rock cutting collection tank (202) can be observed at any time, so as to facilitate timely disposal of the collected rock cuttings; The separation device (2) is switched to two working modes, dust removal and slag-water separation, through a valve (222). The dust removal filter bag (203) is used to filter dust generated during construction above the aquifer to eliminate dust pollution containing pollutants in the polluted strata. A rock cuttings collection tank (202) is connected to the material pipe (201). A water filter baffle (211) is provided in the material pipe (201). The lower edge of the water filter baffle (211) is designed to be flush with the edge of the right tank opening of the rock cuttings collection tank (202); the rock cuttings discharged from the aquifer drilling construction are quickly separated from the groundwater.

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