CN212716747U - Forward and reverse drainage device in downward through-layer drilling - Google Patents
Forward and reverse drainage device in downward through-layer drilling Download PDFInfo
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- CN212716747U CN212716747U CN202021542232.7U CN202021542232U CN212716747U CN 212716747 U CN212716747 U CN 212716747U CN 202021542232 U CN202021542232 U CN 202021542232U CN 212716747 U CN212716747 U CN 212716747U
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Abstract
The utility model discloses a forward and reverse drainage device in downward cross-layer drilling, which comprises an in-hole structure, a main compressed air system, a water collector, a main extraction system and a plurality of extraction channels; the structure in the hole comprises a compressed air drain pipe and an extraction pipe which are arranged in the lower inlet hole, the compressed air drain pipes in the multiple drill holes are connected with a water collector, the water collector is connected with a main compressed air system, the water collector is connected with a blowout preventer, the extraction pipes in the multiple drill holes are connected with extraction multiple ways, the extraction multiple ways are connected with the main extraction system, and the main compressed air system is connected with the extraction multiple ways. The utility model has the advantages that: by adopting the 'forward and reverse' comprehensive drainage technology, the extraction effect is greatly improved, the difficult situation that the extraction effect is poor due to accumulated water in a downward borehole is effectively solved, the extraction capacity is maximized by a mode of discharging the pipe sleeve in the whole process, and the method has popularization and utilization values.
Description
Technical Field
The utility model relates to a coal seam drainage device especially relates to a drainage device in drilling to wearing layer down.
Background
The fact that drainage effect is poor due to the fact that slag is difficult to discharge and accumulated water in the drill hole cannot be effectively discharged is known at present, particularly, the accumulated water in the downward drill hole cannot be discharged through negative pressure, gas drainage effect is affected, but in the aspect of gas control, downward cross drilling cannot be avoided.
As in application No.: 201610486214.3, discloses a drainage device and method for measuring pressure of gas in a downward drilling hole, the method of the application is to extract water in a pressure measuring air chamber through a piston head, the gas extracted together is injected back into the pressure measuring air chamber through a pressure measuring pipe again to dredge the pressure measuring pipe, then the gas pressure in the pressure measuring air chamber is measured, the device not only enables the water in the air chamber to be drained on the premise of ensuring that the gas in the pressure measuring air chamber does not run off, but also dredges the pressure measuring pipe.
However, in the currently adopted method, accumulated water in the pores can not be well discharged in the water discharging process.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: how to solve the problem that the drainage effect is not good for the accumulated water in the existing downward through-layer drilling hole.
The utility model discloses a following technical means realizes solving above-mentioned technical problem:
the positive and negative drainage device in the downward cross-layer drill hole comprises an in-hole structure, a main compressed air system, a water collector, a main extraction system and extraction multi-pass; the structure in the hole comprises a compressed air drain pipe and an extraction pipe which are arranged in the lower inlet hole, the compressed air drain pipes in the multiple drill holes are connected with a water collector, the water collector is connected with a main compressed air system, the water collector is connected with a blowout preventer, the extraction pipes in the multiple drill holes are connected with extraction multiple ways, the extraction multiple ways are connected with the main extraction system, and the main compressed air system is connected with the extraction multiple ways.
In the utility model, when water is drained in the forward direction, the pressure wind is pressed into the water collector through the wind pressing system, the water collector sends the pressure wind into each wind pressing drain pipe, water and gas flow into the extraction multi-way pipe and are extracted through the extraction multi-way pipe; during reverse drainage, pressure air is pumped into the extraction multi-way through the air compression system, the extraction multi-way conveys the pressure air into each extraction pipe, water and gas flow into the water collector, and extraction is carried out by utilizing the extraction system connected with the blowout preventer; by adopting the 'forward and reverse' comprehensive drainage technology, the extraction effect is greatly improved, the difficult situation that the extraction effect is poor due to accumulated water in a downward borehole is effectively solved, the extraction capacity is maximized by a mode of discharging the pipe sleeve in the whole process, and the method has popularization and utilization values.
Preferably, the extraction pipe is a perforated pipe with a plurality of spaced holes.
Preferably, the structure in the hole further comprises a pipe sleeve, the pipe sleeve comprises an iron pipe and a dual-resistance pipe, the iron pipe playing a role of hole protection is fixed at the hole opening, the dual-resistance pipe sequentially penetrates through the iron pipe, the extraction pipe is located in the pipe sleeve, and the compressed air drain pipe is located in the extraction pipe.
Preferably, the structure in the hole further comprises a bag, the bag is fixedly connected with the joint of the double-resistance tube at the lowest end, and a bag grouting tube is arranged on the bag.
Preferably, the hole structure further comprises a grouting pipe and a slurry return pipe, and the grouting pipe and the slurry return pipe are fixed at the hole.
Preferably, the orifice of the slurry return pipe faces upwards, the orifice of the grouting pipe faces downwards, and valves are required to be installed on the grouting pipe and the slurry return pipe.
Preferably, the water collector is provided with a plurality of connecting ports, the compressed air drain pipes positioned in the connecting holes at two ends of the drain pipes outside the holes are connected with the connecting ports of the water collector, the bottom of the water collector is provided with a drain valve, and the top of the water collector is connected with a blowout preventer.
Preferably, the extraction manifold is provided with a plurality of connecting ports, two ends of an extraction hose positioned outside the hole are connected with the connecting ports of the extraction pipes and the extraction manifold in the plurality of drill holes, the bottom of the extraction manifold is connected with the automatic water drainage device, a valve is arranged between the extraction manifold and the automatic water drainage device, and the top of the extraction manifold is connected with the main compressed air system. The water collector and the extraction multi-way can be formed by self-manufacturing of the existing pipeline, and materials are saved.
Preferably, the main compressed air system comprises a main compressed air pipe and two compressed air pipes, the main compressed air pipe is connected with the two compressed air pipes, one of the compressed air pipes is connected with the water collector, and the other compressed air pipe is connected with the extraction multi-way.
Preferably, the main extraction system comprises a main extraction pipe, the main extraction pipe is connected with the top of the extraction multi-way, and a butterfly valve is arranged between the main extraction pipe and the extraction multi-way.
The utility model has the advantages that:
(1) in the utility model, when water is drained in the forward direction, the pressure wind is pressed into the water collector through the wind pressing system, the water collector sends the pressure wind into each wind pressing drain pipe, water and gas flow into the extraction multi-way pipe and are extracted through the extraction multi-way pipe; during reverse drainage, pressure air is pumped into the extraction multi-way through the air compression system, the extraction multi-way conveys the pressure air into each extraction pipe, water and gas flow into the water collector, and extraction is carried out by utilizing the extraction system connected with the blowout preventer; by adopting a forward and reverse comprehensive drainage technology, the extraction effect is greatly improved, the difficult situation that the extraction effect is poor due to accumulated water in a downward borehole is effectively solved, the extraction capacity is maximized in a whole-course pipe casing discharging mode, and the method has popularization and utilization values;
(2) the water collector, the extraction multi-way pipe and the like can be formed by self-manufacturing the existing pipeline, so that the material is saved;
(3) the drainage mode can be reasonably arranged according to respective advantages of the forward drainage valve and the reverse drainage method, and the efficiency is improved.
Drawings
FIG. 1 is a schematic view of the sealing of the drainage hole in the downward cross-layer hole of the embodiment of the present invention;
FIG. 2 is a schematic view of a positive and negative drainage device in a down-hole cross-hole borehole;
reference numbers in the figures: 1. structure in the hole; 11. an iron pipe; 12. a double anti-solid tube; 13. a pouch; 14. a pouch grouting pipe; 15. a grouting pipe; 16. a pulp returning pipe; 17. a compressed air drain pipe; 18. a floral tube; 2. a water collector; 21. a drain valve; 22. an anti-blowout valve; 3. pumping and extracting multiple channels; 4. a main compressed air system; 41. a main pressure air pipe; 42. pressing an air pipe; 43. a first air inlet valve; 44. a second air inlet valve; 5. a main extraction system; 51. a main extraction pipe; 52. a butterfly valve; 6. an automatic water discharger; 61. a water inlet valve.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the hole structure 1 comprises an iron pipe 11, a double anti-solid pipe 12, a bag 13, a bag grouting pipe 14, a grouting pipe 15, a slurry return pipe 16, an air pressure drain pipe 17 and a perforated pipe 18; the steel pipe 11 is 2 inches, the top of the steel pipe extends out of the orifice for a certain distance, the bottom of the steel pipe is connected with a plurality of double-resisting solid pipes, the perforated pipe 18 is a PVC pipe with the diameter of phi 12mm and is positioned in the steel pipe 11 and the double-resisting solid pipes 12, and the pocket 13, the pocket grouting pipe 14, the grouting pipe 15 and the slurry return pipe 16 are used for grouting and fixing the pipes at the orifice section and select proper specifications according to the requirements in the prior art; the compressed air drain pipe 17 is positioned in the perforated pipe 18.
In the embodiment, the drilling is carried out by a ZDY3200S type hydraulic drilling machine, the drill rod is a phi 73mm large-drift-diameter rib drill rod, the drill bit is a phi 120mm open-close type drill bit, and the grouting pump is a ZBQ-25/5 pneumatic grouting pump. The drilling adopts full-pressure air-blast slagging drilling, a following pipe drilling process, a blowout preventer is installed during fault zone drilling construction, the drilling and sealing adopt whole-course casing pipe setting and single-bag bottom-sitting 'two-plugging one-injection' mode for sealing, and whole-course drainage pipes realize 'one-drilling, one-sealing and one-injection'. The method comprises the following specific steps:
the concrete construction steps are as follows:
s1, drilling a hole with a phi 153mm composite sheet drill bit to drill a 1m, lowering a phi 146mm hole pipe, installing a blowout preventer, using a phi 120 open-close type drill bit to drill to a designed hole depth by adopting full-pressure wind to perform slag discharge, continuing to discharge slag for 5-10min, lifting a drill rod for 0.5m, lowering a perforated pipe 18 from the inside of the drill rod, and after a hole bottom fixing device, taking out the drill rod, wherein the perforated pipe 18 is a 1-inch PVC pipe and is provided with a plurality of spaced through holes along the length direction of the pipe, and the perforated pipe can be manufactured by self;
s2: grouting and sealing holes, wherein 1 2-inch iron pipe 11 is used at the outer opening of a drilled hole, and the hole opening is exposed by 100mm so as to facilitate stubble combining and extraction; the middle part is provided with 10 1.5-inch double anti-solid tubes 12, the joint of the 10 th double anti-solid tube 12 (namely the position with the opening facing inwards to 20 m) is bound and sent into the hole by using a bag 13 (the two ends of the bag 13 are fixed on a hole sealing tube by using adhesive tapes to prevent the bag 13 from sliding or falling off when being sent into a drill hole), the opening is sealed by pouring 8-10 groups of polyurethane into the bag 13 by using a bag grouting tube 14 with the length of 1 m; the hole sealing section is not less than 20m, and if the depth of the visible coal is less than 20m, the hole sealing is carried out until the visible coal point is reached;
a compressed air drain pipe 17 is arranged downwards in the drilled hole, in the embodiment, the compressed air drain pipe 17 is a phi 12mm PVC pipe and is used for draining water downwards to the bottom of the drilled hole; the iron pipe 11 and the double anti-solid pipe 12 inches are positioned outside the perforated pipe 18, and the compressed air drain pipe 17 is positioned inside the perforated pipe 18;
after the slurry is proportioned, grouting and hole sealing are carried out on the hole opening section through a grouting pipe 15 and a slurry return pipe 16, and the water-cement ratio of the slurry is 0.7: 1, the slurry must be stirred uniformly, grouting must be carried out under pressure, and the pumping pressure is not lower than 1.5 MPa.
As shown in FIG. 2, S3, connecting the compressed air drain pipes 17 in a plurality of drill holes with a water collector 2, connecting the water collector 2 with a main compressed air system 4, arranging a blowout preventer on the water collector 2, connecting the blowout preventer with an extraction system, connecting the iron pipes 11 in the plurality of drill holes with an extraction multi-way 3, connecting the extraction multi-way 3 with a main extraction system 5, and connecting the main compressed air system 4 with the extraction multi-way 3;
the water collector 2 is provided with a plurality of connecting ports, the water discharge pipes outside the through holes can be connected with a plurality of compressed air water discharge pipes 17, the bottom of the water collector 2 is provided with a water discharge valve 21, the top of the water collector is connected with a blowout preventer, a blowout preventer 22 is arranged between the water collector and the blowout preventer, the blowout preventer is connected with an extraction system, and the extraction system can be connected with the main extraction system 5 or can be an independent extraction system;
the extraction multi-way 3 is provided with a plurality of connecting ports, a hose outside the hole of the extraction multi-way 3 is connected with a plurality of perforated pipes 18, the bottom of the extraction multi-way 3 is connected with an automatic water drainage device 6, the extraction multi-way 3 and the automatic water drainage device 6 are provided with water inlet valves 61, and the top of the extraction multi-way 3 is connected with a main compressed air system 4;
the main compressed air system 4 comprises a main compressed air pipe 41 and two compressed air pipes 42, wherein the main compressed air pipe 41 is connected with the two compressed air pipes 42, one compressed air pipe 42 is connected with the water collector 2, a first air inlet valve 43 is arranged on a pipeline connected with the water collector 2, the other compressed air pipe 42 is connected with the extraction multi-way 3, and a second air inlet valve 44 is arranged on a pipeline connected with the extraction multi-way 3;
the main extraction system 5 comprises a main extraction pipe 51, the main extraction pipe 51 is connected with the top of the extraction manifold 3, and a butterfly valve 52 is arranged between the main extraction pipe 51 and the extraction manifold 3;
before drainage, checking the opening and closing states of the gate valves in the extraction state: during extraction, the butterfly valve 52 is opened, the water inlet valve 61 is opened, the first air inlet valve 43 and the second air inlet valve 44 are closed, the blowout prevention valve 22 is closed, and the drain valve 21 is closed.
S4, positive drainage: controlling the suction of the butterfly valve 52, opening the first air inlet valve 43, opening the water inlet valve 61, discharging water by the automatic water discharger 6, closing the first air inlet valve 43 and opening the butterfly valve 52 after the water discharge is finished;
the method specifically comprises the following steps: the main pressure air pipe 41 is used for pressing air through the water collector 2, the water collector 2 presses the pressed air into the hole pressure air drain pipe 17, the pressed air is pressed into the drilled hole, at the moment, the butterfly valve 52 of the main extraction system 5 controls the opening size, the main extraction system 5 is in a negative pressure state, and the accumulated water in the hole is collected into the extraction multi-way pipe 3 by using air pressure and negative pressure; when the compressed air is used for draining, water is discharged from an automatic water drainer 6 connected to the extraction multi-way 3, and gas is extracted;
s5: and (3) reverse drainage: opening the blowout prevention valve 22, closing the water inlet valve 61, closing the butterfly valve 52, opening the second air inlet valve 44, opening the drain valve 21, closing the second air inlet valve 44 after the water drainage is finished, closing the drain valve 21, opening the butterfly valve 52, opening the water inlet valve 61, and closing the blowout prevention valve 22;
the method specifically comprises the following steps: the main pressure air pipe 41 is used for pressing air into the drill hole through the perforated pipe 18 connected to the extraction manifold 3, the accumulated water in the drill hole is made to return to the water collector 2 through the air pressure drain pipe 17 in the drill hole and the drain pipe connected to the water collector 2 outside the drill hole by air pressure, and water is drained through the drain valve of the water collector 2.
The blowout prevention valve 22 on the water collector 2 must be opened during drainage in this method to ensure that the gas drained during compressed air drainage enters the blowout prevention system and the gas is prevented from overflowing from the drainage outlet.
Example two:
on the basis of the first embodiment, because a reverse drainage method is adopted, a main pressure air pipe is used for pressing air into a drill hole through an air pipe connected with a plurality of joints, and water accumulated in the drill hole is returned to a water collector through a pressure air drainage pipe arranged in the drill hole and a drainage pipe connected to the water collector outside the drill hole by using air pressure, the drainage pipe is easy to block by residues in the drill hole during drainage due to small diameter of the pressure air drainage pipe, so that drainage is unsmooth and suppressed, water seepage of a roadway bottom plate, falling of an extraction hose and air leakage are caused, and a drainage pipe joint is likely to collapse; the advantages are that: the pressure and the wind of blowing water are large, and the water discharge is large; the 'forward drainage' does not have the defects, but has the defect of small drainage;
therefore, in the using process, when water is reversely drained, the pressure and the wind of blowing water are large, and the water drainage amount is large; when the water is discharged in the forward direction, the problems of unsmooth water discharge and pressure building of the compressed air drain pipe 17 can be avoided; so during down hole construction, the 'forward drainage method' is selected; and a reverse drainage method is adopted in the later stage. Can improve drainage efficiency through reasonable arrangement forward drainage and reverse drainage.
The embodiment is applied to a coal seam, and the coal seam rock roadway section has a designed total length of 136m, wherein the total length of a drift section is 63m, and the total length of an inclined roadway section is 73 m. The elevation of the area is-651.9 m, the expected coal uncovering length is 36m, the actually measured gas pressure is 0.57MPa, and the gas content is 6.6m 3/t. The drill holes 27 are designed in total, the inclination angle of the drill holes ranges from minus 20 degrees to minus 54 degrees, and the total drilling amount is about 2.2 ten thousand meters. In the downward drilling construction process, the main water filling water source is coal top and bottom plate sandstone fracture water, so that the drilling construction and hole sealing grouting difficulty is high, the influence on the gas extraction effect is particularly large, and the extraction problem is solved by adopting a compressed air drainage technology;
after the implementation, a forward and reverse comprehensive drainage technology is adopted, a relatively obvious extraction effect is obtained by drilling a downward cross layer under a roadway thick coal seam in a certain coal measure, and until now, the extraction rate of an evaluation unit at the position reaches 50.98%, wherein the average gas concentration of a dry pipe during pre-extraction is 32.6%, and the maximum concentration is 61%.
At present, through use, the situation that the downward drilling extraction effect is poor and the gas extraction is difficult can be effectively solved by adopting the forward and reverse comprehensive drainage technology, and the method has popularization and utilization values.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The positive and negative drainage device in the downward cross-layer drill hole is characterized by comprising a hole inner structure, a main compressed air system, a water collector, a main extraction system and an extraction multi-way; the structure in the hole comprises a compressed air drain pipe and an extraction pipe which are arranged in the lower inlet hole, the compressed air drain pipes in the multiple drill holes are connected with a water collector, the water collector is connected with a main compressed air system, the water collector is connected with a blowout preventer, the extraction pipes in the multiple drill holes are connected with extraction multiple ways, the extraction multiple ways are connected with the main extraction system, and the main compressed air system is connected with the extraction multiple ways.
2. The device for positive and negative drainage in a down-hole cross-cut borehole according to claim 1, wherein the extraction pipe is a perforated pipe with a plurality of spaced holes.
3. The device for positive and negative drainage in a downward cross-layer drill hole according to claim 1, wherein the hole inner structure further comprises a pipe sleeve, the pipe sleeve comprises an iron pipe and a plurality of double-resistance pipes, the iron pipe is fixed at the hole opening, the bottom of the iron pipe is connected with the plurality of double-resistance pipes which are sequentially connected, the extraction pipe is located in the pipe sleeve, and the compressed air drainage pipe is located in the extraction pipe.
4. The apparatus as claimed in claim 3, wherein the downhole structure further comprises a bladder, the bladder is fixedly connected to the joint of the double-resistance tube at the lowest end, and the bladder is provided with a bladder grouting tube.
5. The device for draining water in a downward through-layer drill hole in a positive and negative direction as claimed in claim 3, wherein the inner structure of the hole further comprises a grouting pipe and a slurry return pipe, and the grouting pipe and the slurry return pipe are fixed at the hole.
6. The device for draining water in the forward and reverse directions in the downward through-layer drill hole according to claim 5, wherein the orifice of the slurry return pipe faces upwards, the orifice of the grouting pipe faces downwards, and valves are required to be installed on the grouting pipe and the slurry return pipe.
7. The device for draining water in a downward through-layer drill hole in a forward and reverse direction according to claim 1, wherein the water collector is provided with a plurality of connecting ports, the compressed air drainage pipe in the connecting holes at two ends of the drainage pipe outside the hole is connected with the connecting ports of the water collector, the bottom of the water collector is provided with a drainage valve, and the top of the water collector is connected with the blowout preventer.
8. The device for positive and negative drainage in the downward cross-layer borehole according to claim 1, characterized in that the extraction manifold has a plurality of connectors, two ends of an extraction hose located outside the borehole connect extraction pipes in the plurality of boreholes with the connectors of the extraction manifold, the bottom of the extraction manifold is connected with an automatic water discharger, a valve is arranged between the extraction manifold and the automatic water discharger, and the top of the extraction manifold is connected with a main compressed air system.
9. The device for positive and negative drainage in a downward cross-layer drill hole according to claim 1, wherein the main compressed air system comprises a main compressed air pipe and two compressed air pipes, the main compressed air pipe is connected with both the two compressed air pipes, one of the compressed air pipes is connected with the water collector, and the other compressed air pipe is connected with the extraction multi-way.
10. The device for positive and negative drainage in a downward cross-layer borehole according to claim 1, wherein the main extraction system comprises a main extraction pipe, the main extraction pipe is connected with the top of the extraction manifold, and a butterfly valve is installed between the main extraction pipe and the extraction manifold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021542232.7U CN212716747U (en) | 2020-07-29 | 2020-07-29 | Forward and reverse drainage device in downward through-layer drilling |
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| CN202021542232.7U CN212716747U (en) | 2020-07-29 | 2020-07-29 | Forward and reverse drainage device in downward through-layer drilling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027389A (en) * | 2021-04-01 | 2021-06-25 | 中勘资源勘探科技股份有限公司 | Double-ring air-pressure boosting type water lifting pipeline connecting structure and water lifting method thereof |
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2020
- 2020-07-29 CN CN202021542232.7U patent/CN212716747U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027389A (en) * | 2021-04-01 | 2021-06-25 | 中勘资源勘探科技股份有限公司 | Double-ring air-pressure boosting type water lifting pipeline connecting structure and water lifting method thereof |
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