CN115680497A - Rapid well drilling device and method with filter tube and inner core drill rod separable - Google Patents
Rapid well drilling device and method with filter tube and inner core drill rod separable Download PDFInfo
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- CN115680497A CN115680497A CN202211307412.0A CN202211307412A CN115680497A CN 115680497 A CN115680497 A CN 115680497A CN 202211307412 A CN202211307412 A CN 202211307412A CN 115680497 A CN115680497 A CN 115680497A
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- 238000011065 in-situ storage Methods 0.000 claims description 3
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- 230000008569 process Effects 0.000 abstract description 6
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- 238000001914 filtration Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention discloses a rapid well drilling device and method with separable filter tubes and inner core drill rods, and relates to a dewatering well device. The invention adopts the rapid well drilling device based on the steel pipe casing, thereby simplifying the traditional well construction process; such as filter material filling, capping and the like, shortens the time of well construction, and wins precious rescue time for effectively treating leakage disasters.
Description
Technical Field
The invention relates to a dewatering well device, in particular to a rapid well drilling device and a rapid well drilling method with a filter pipe and an inner core drill rod which can be separated.
Background
When the foundation ditch excavation, the construction needs dry operation face, simultaneously for guaranteeing construction safety, excavate and go to and need precipitation engineering, so the precipitation well device of foundation ditch engineering is indispensable.
The traditional dewatering well forming technology adopts a mud wall protection and drilling mode of a drilling machine. The method has the advantages of complex working procedures and long well forming time, and can be divided into the processes of well position measurement and release, drilling rig installation, drilling rig pore-forming, emptying and slurry replacement, well pipe lowering, filter material and clay ball enclosing and filling, well washing and the like according to stages.
In engineering, along with the continuous expansion of excavation depth of a foundation pit, the traditional bottom-falling type waterproof curtain has the phenomena of long construction period, high manufacturing cost, incapability of guaranteeing construction quality and the like. In order to save the construction cost and reduce the construction period, a suspended waterproof curtain is usually adopted, the suspended waterproof curtain is not inserted into the waterproof layer, and water outside the pit bypasses the waterproof curtain and enters the pit during the precipitation period. The risk of surging appears in the foundation ditch, to outside the hole, need carry out decompression precipitation for the foundation ditch bottom plate falls below the safe flood peak, and for the safety of assurance foundation ditch, pressure-bearing precipitation also seems to be especially important.
In actual engineering, leakage disasters can appear in structures such as waterproof curtains or tunnel segments of foundation pits because of quality factors, unexpected reasons and the like, and when the leakage disasters are managed, leakage parts need to be plugged through other technologies such as grouting. In order to reduce the water leakage amount, the water head difference inside and outside the tunnel (foundation pit) is reduced by matching with plugging, and precipitation and pressure reduction are required to be carried out near the leakage point, so that the water leakage reduction well is generally called as an emergency relief dewatering well. For the emergency relief well, the well forming speed and the well forming quality are particularly important for the treatment of leakage disasters.
Disclosure of Invention
The invention aims to provide a rapid well drilling device and a rapid well drilling method with a filter pipe and an inner core drill rod capable of being separated, and aims to solve the technical problems that in the prior art, the well drilling speed is low and the well drilling quality is low when an emergency relief well is relieved.
The invention provides a quick well drilling device and a quick well drilling method with a filter pipe and an inner core drill rod capable of being separated, wherein the quick well drilling device comprises a drill bit and an embedded drill rod outer core fixedly connected with the drill bit, a plurality of filter holes are formed in the embedded drill rod outer core, a clamping bolt hole is formed in one end, away from the drill bit, of the embedded drill rod outer core, an embedded drill rod inner core is arranged in the embedded drill rod outer core, a lapping table is arranged on the outer side wall of one end, away from the drill bit, of the embedded drill rod inner core, the embedded drill rod inner core is lapped on the end portion of the embedded drill rod outer core through the lapping table, a clamping bolt is inserted in the clamping bolt hole, one end of the clamping bolt is fixedly connected with the embedded drill rod inner core, the other end of the embedded drill rod inner core extends to the outside of the clamping bolt hole, an integrated drill rod fixedly connected with the embedded drill rod inner core is arranged at one end, away from the drill bit, a steel pipe protective cylinder is sleeved outside the embedded drill rod outer core, a plurality of conventional steel pipe protective cylinders connected in sequence are arranged at one end, the end, away from the drill bit, the end of the first conventional steel pipe protective cylinder is fixedly connected with one end of the steel pipe protective cylinder, the end of the drill bit is far away from the drill bit, and the inner cylinder is smaller than the maximum distance between the two sides of the drill bit.
Furthermore, the clamping bolt is connected with the nested drill rod inner core in a welding mode, and the diameter of the clamping bolt hole is larger than the diameter of the clamping bolt.
Furthermore, the drill bit is provided with an external thread, the end part of the outer core of the nested drill rod is provided with an internal thread, the drill bit and the outer core of the nested drill rod are fixedly connected through the matching of the external thread and the internal thread, and the drill bit and the outer core of the nested drill rod can be quickly connected together in a threaded connection mode.
Furthermore, the diameter of the lapping table is equal to the outer diameter of the outer core of the nested drill rod, a plurality of first socket connecting grooves distributed circumferentially are arranged on the lapping table, a first socket connecting sheet is formed between every two adjacent first socket connecting grooves, a plurality of second socket connecting grooves distributed circumferentially are arranged on a section, close to the lapping table, of the outer core of the nested drill rod, a second socket connecting sheet is formed between every two adjacent second socket connecting grooves, when the outer core of the nested drill rod is connected with the inner core of the nested drill rod, the first socket connecting sheets are inserted into the corresponding second socket connecting grooves, and the second socket connecting sheets are inserted into the corresponding first socket connecting grooves, so that when any one of the outer core of the nested drill rod and the inner core of the nested drill rod is connected, the other one of the outer core of the nested drill rod and the inner core of the nested drill rod cannot rotate.
Furthermore, the filter holes in the outer core of the nested drill rod are bridge filter holes, so that the bridge filter holes are good in filter effect and not prone to blocking.
Further, one end of the steel pipe casing is provided with a first socket part, the inner diameter of the first socket part is larger than that of the steel pipe casing, the first socket part is provided with a bolt hole and a plurality of socket connectors, one end of the conventional steel pipe casing is provided with a second socket part, the outer diameter of the second socket part is equal to that of the first socket part, the second socket part is provided with a bolt hole and a socket connector, when the second socket part is inserted into the first socket part, the socket connector is inserted and matched with the socket connectors, and the bolt holes in the first socket part and the second socket part are connected through bolts.
The invention also provides a well drilling method of the rapid well drilling device with the filter tube and the inner core drill rod being separable, which comprises the following steps:
s1: determining typical soil layer distribution of a field according to geological survey data, and determining the lengths of a steel pipe casing, an outer core of an embedded drill rod and an inner core of the embedded drill rod of the rapid well drilling device according to the soil layer distribution;
s2: connecting a drill bit with the outer core of the nested drill rod, and mutually positioning and connecting the inner core of the nested drill rod and the outer core of the nested drill rod;
s3: when the drilling machine works, the drill bit carries the inner core of the nested drill rod and the outer core of the nested drill rod to drill downwards to form a dewatering well hole, and then the steel pipe protective cylinder is hung to the upper end of the drill bit and sinks synchronously along with the drill bit;
s4: continuing to drill downwards, and sequentially increasing a conventional steel pipe protective cylinder and an integrated drill rod from bottom to top until the inner core of the nested drill rod and the outer core of the nested drill rod reach a water-bearing layer of target precipitation;
s5: the integrated drill rod is pulled upwards, the drill bit upwards contacts the steel pipe protective cylinder along with the inner core of the nested drill rod and the outer core of the nested drill rod, and the drill bit is blocked by the steel pipe protective cylinder and cannot continuously move upwards; continuously pulling up, wherein a clamping bolt at the joint of the nested drill rod inner core and the nested drill rod outer core is damaged by stress, the nested drill rod inner core moves upwards along with the integrated drill rod, and the drill bit and the nested drill rod outer core are kept in situ; upwards pulling the nested drill rod inner core, and stopping upwards pulling when the nested drill rod inner core is about to be separated from the nested drill rod outer core;
s6: after the operation is finished, the integrated drill rod and the nested drill rod inner core are taken as a precipitation well pipe, the nested drill rod outer core is taken as a precipitation well filter screen segment, and the drill bit is taken as a precipitation well bottom sealing;
s7: a water pump is lowered into the dewatering well pipe, and the dewatering well works normally;
s8: after the dewatering well is used, the well drilling device is pulled out and recovered, and can be reused after being washed;
s9: and (7) backfilling the precipitation well hole.
Further, when the nested drill rod inner core and the nested drill rod outer core are connected in a mutually positioned mode in the S2, the clamping bolt is inserted into the clamping bolt hole, and one end, inserted into the clamping bolt hole, of the clamping bolt is welded with the nested drill rod inner core.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the rapid well drilling device based on the steel pipe casing, thereby simplifying the traditional well forming construction process; such as filter material filling, top sealing and the like, shortens the time of well construction, and wins precious rescue time for effectively treating leakage disasters.
2. The application of the steel pipe protective cylinder reduces the use of a slurry protective wall, can prevent hole collapse after the hole is formed by the drilling machine, and also has the function of ensuring slurry circulation in underground seepage and ensuring normal work of the drilling machine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic perspective view of a steel pipe casing according to the present invention;
FIG. 3 is a schematic perspective view of a conventional steel pipe casing according to the present invention;
FIG. 4 is a schematic perspective view of the steel pipe casing according to the present invention assembled with a conventional steel pipe casing;
FIG. 5 is an assembled elevation view of a drill bit, nested drill rod outer core, nested drill rod inner core, and integral drill rod of the present invention;
FIG. 6 is a front view of the drill bit of the present invention;
FIG. 7 is a schematic perspective view of a drill bit according to the present invention;
FIG. 8 is a schematic perspective view of the nested drill rod core of the present invention;
FIG. 9 is a schematic perspective view of the outer core of the nested drill rod of the present invention;
fig. 10 is a schematic perspective view of a drill bit, an inner nested drill rod core, and an outer nested drill rod core of the present invention.
Reference numerals are as follows:
1. a drill bit; 2. nesting the outer core of the drill rod; 3. filtering holes; 4. a latch hole; 5. nesting the inner core of the drill rod; 6. a lapping table; 7. fastening a bolt; 8. an integrated drill rod; 9. protecting the steel pipe; 10. protecting a cylinder by using a conventional steel pipe; 11. an external thread; 12. an internal thread; 13. a first socket connecting groove; 14. a first socket connecting sheet; 15. a second socket connecting groove; 16. a second socket connecting sheet; 17. a first socket part; 18. bolt holes; 19. a socket connector; 20. a second socket part; 21. socket connecting piece.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the invention provides a quick well drilling device and a quick well drilling method with a filter tube and an inner core drill rod separable, which are shown in the following figures 1-10, and the quick well drilling device comprises a drill bit 1 and an outer nested drill rod core 2 fixedly connected with the drill bit 1, wherein in order to improve the connection speed between the drill bit 1 and the outer nested drill rod core 2 during operation, an external thread 11 is arranged on the drill bit 1, an internal thread 12 is arranged at the end part of the outer nested drill rod core 2, the drill bit 1 and the outer nested drill rod core 2 are fixedly connected through the matching of the external thread 11 and the internal thread 12, and the drill bit 1 and the outer nested drill rod core 2 can be quickly connected together in a threaded connection mode.
Referring to fig. 9, in order to enable the nested drill rod outer core 2 to play a role in filtering in the working process, a plurality of filter holes 3 are arranged on the nested drill rod outer core 2, the filter holes 3 are bridge type filter holes, the mesh number of the filter holes meets the porosity requirement of a conventional dewatering well filter screen segment, underground water flow can freely enter the drill rod through the bridge type filter holes of the outer core, the bridge type filter holes have better filtering effect and are not easy to block; when water is pumped, water in the stratum can enter the inner part of the nested drill rod outer core 2 through the bridge type filter holes and is pumped away by the water pump, and impurities are blocked outside the nested drill rod outer core 2.
Specifically, referring to fig. 8 and 9, a clamping bolt hole 4 is formed in one end, away from a drill bit 1, of an outer nested drill rod core 2, an inner nested drill rod core 5 is arranged inside the outer nested drill rod core 2, an overlapping table 6 is arranged on an outer side wall, away from the drill bit 1, of the inner nested drill rod core 5, the end portion of the outer nested drill rod core 2 is overlapped through the overlapping table 6, a clamping bolt 7 is inserted into the clamping bolt hole 4, is generally made of steel and is a short-end straight steel bar rod, the diameter of the short-end straight steel bar rod is about 10 to 15mm, the number of the short-end straight steel bar rod is uniformly distributed along the axial direction, the clamping bolt 7 can bear the dead weight of the drill bit 1 and the inner nested drill rod core 5 during drilling of a drilling machine, one end of the clamping bolt 7 is fixedly connected with the inner nested drill rod core 5, the clamping bolt 7 is connected with the inner nested drill rod core 5 in a welding mode, and the aperture of the clamping bolt hole 4 is larger than the diameter of the clamping bolt 7; because the clamping bolt 7 is inserted into the clamping bolt hole 4, the end part of the clamping bolt 7 positioned in the clamping bolt hole 4 is very difficult to be fixedly connected with the nested drill rod inner core 5, the aperture of the clamping bolt hole 4 is enlarged, and the clamping bolt 7 and the nested drill rod inner core 5 can be welded together conveniently by extending the welding into the clamping bolt hole 4. The other end of the nested drill rod core 5 extends outside the bayonet hole 4.
Specifically, referring to fig. 8 and 9, the diameter of the lapping table 6 is equal to the outer diameter of the outer core 2 of the nested drill rod, a plurality of first socket connecting grooves 13 distributed circumferentially are arranged on the lapping table 6, a first socket connecting piece 14 is formed between every two adjacent first socket connecting grooves 13, a plurality of second socket connecting grooves 15 distributed circumferentially are arranged on a section of the outer core 2 of the nested drill rod, which is close to the lapping table 6, a second socket connecting piece 16 is formed between every two adjacent second socket connecting grooves 15, when the outer core 2 of the nested drill rod is connected with the inner core 5 of the nested drill rod, the first socket connecting pieces 14 are inserted into the corresponding second socket connecting grooves 15, and the second socket connecting pieces 16 are inserted into the corresponding first socket connecting grooves 13, so that when any one of the outer core 2 of the nested drill rod and the inner core 5 of the nested drill rod is fixed, the other one cannot rotate, and the stability of the device during drilling and raising is improved.
The one end that drill bit 1 was kept away from to nested drilling rod inner core 5 is equipped with rather than fixed connection's integrated drilling rod 8, the outside cover of nested drilling rod outer core 2 is equipped with steel pipe and protects a section of thick bamboo 9, the one end that drill bit 1 was kept away from to steel pipe protects a section of thick bamboo 9 is equipped with a plurality of conventional steel pipes that connect gradually and protects a section of thick bamboo 10, and the tip that a section of thick bamboo 10 was protected to first conventional steel pipe protects a section of thick bamboo 9 and steel pipe and protects a section of thick bamboo 9 one end fixed connection who keeps away from drill bit 1, the internal diameter that a section of thick bamboo 9 is close to drill bit 1 one end is less than the maximum distance between the drill bit 1 both sides, a section of thick bamboo 9 is protected to steel pipe and conventional steel pipe protects a section of thick bamboo 10, its material generally is steel. The steel pipe protective cylinder 9 and the conventional steel pipe protective cylinder 10 can prevent hole collapse, and also have the functions of ensuring slurry circulation in underground seepage and ensuring normal work of a drilling machine.
Specifically, referring to fig. 2 to 4, the steel duct 9 is limited by construction equipment and a site, and is divided into sections along an axial length, so that the steel duct 9 is designed to be connected with a plurality of conventional steel ducts 10, in order to facilitate connection between the conventional steel ducts and the conventional steel ducts, a first socket 17 is provided at one end of the steel duct 9, an inner diameter of the first socket 17 is larger than an inner diameter of the steel duct 9, a bolt hole 18 and a plurality of socket connectors 19 are provided on the first socket 17, a second socket 20 is provided at one end of the conventional steel duct 10, an outer diameter of the second socket 20 is equal to the inner diameter of the first socket 17, a bolt hole 18 and a socket connector 21 are provided on the second socket 20, when the second socket 20 is inserted into the first socket 17, the socket connector 21 is inserted into the socket connector 19, and the bolt holes 18 on the first socket 17 and the second socket 20 are connected by bolts.
The invention also provides a well drilling method of the rapid well drilling device with the filter tube and the inner core drill rod separable, which comprises the following steps:
s1: determining typical soil layer distribution of a field according to geological survey data, and determining the lengths of a steel pipe casing 9, an outer core 2 of an embedded drill rod and an inner core 5 of the embedded drill rod of the rapid well drilling device according to the soil layer distribution;
s2: connecting a drill bit 1 with an outer core 2 of the nested drill rod, and mutually positioning and connecting an inner core 5 of the nested drill rod with the outer core 2 of the nested drill rod; inserting the clamping bolt 7 into the clamping bolt hole 4, and welding one end of the clamping bolt 7 inserted into the clamping bolt hole 4 with the nested drill rod inner core 5;
s3: when the drilling machine works, the drill bit 1 carries the nested drill rod inner core 5 and the nested drill rod outer core 2 to drill downwards to form a precipitation well hole, and then the steel pipe protective cylinder 9 is hung to the upper end of the drill bit 1 and sinks synchronously with the drill bit 1; in order to avoid hole collapse during drilling, the whole drilling process is matched with the sleeve for use; the sleeve is matched with the drill hole, so that the process of backfilling the filter material is more material-saving and time-saving;
s4: continuing to drill downwards, and sequentially increasing a conventional steel pipe protective cylinder 10 and an integrated drill rod 8 from bottom to top until the nested drill rod inner core 5 and the nested drill rod outer core 2 reach a water-bearing stratum of target precipitation;
s5: the integrated drill rod 8 is pulled upwards, the drill bit 1 upwards contacts the steel pipe casing 9 along with the nested drill rod inner core 5 and the nested drill rod outer core 2, and the drill bit 1 is blocked by the steel pipe casing 9 and cannot continuously move upwards; continuously pulling up, wherein a clamping bolt 7 at the joint of the nested drill rod inner core 5 and the nested drill rod outer core 2 is damaged by force, the nested drill rod inner core 5 moves upwards along with the integrated drill rod 8, and the drill bit 1 and the nested drill rod outer core 2 are kept in situ; upwards pulling the nested drill rod inner core 5, and stopping upwards pulling when the nested drill rod inner core 5 is about to be separated from the nested drill rod outer core 2;
s6: after the operation is finished, the integrated drill rod 8 and the nested drill rod inner core 5 are regarded as a precipitation well pipe, the nested drill rod outer core 2 is regarded as a precipitation well filter screen segment, and the drill bit 1 is regarded as a precipitation well bottom sealing;
s7: a water pump is lowered into the dewatering well pipe, and the dewatering well works normally;
s8: after the dewatering well is used, the well drilling device is pulled out and recovered, and can be reused after being washed;
s9: and (7) backfilling the precipitation well hole.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a filter tube and separable quick well drilling device of inner core drilling rod, includes drill bit (1), its characterized in that: the drill bit is characterized by further comprising an outer nested drill rod core (2) fixedly connected with the drill bit (1), a plurality of filter holes (3) are formed in the outer nested drill rod core (2), a clamping bolt hole (4) is formed in one end, far away from the drill bit (1), of the outer nested drill rod core (2), an inner nested drill rod core (5) is arranged inside the outer nested drill rod core (2), the outer nested drill rod core (2) and the inner nested drill rod core (5) are fixedly connected with one end, far away from the drill bit (1), of the inner nested drill rod core (5), a clamping bolt (7) is inserted into the clamping bolt hole (4), one end of the clamping bolt (7) is fixedly connected with the inner nested drill rod core (5), an integrated drill rod (8) fixedly connected with the inner nested drill bit (1) is arranged at one end, far away from the drill bit (1), a steel pipe protective cylinder (9) is sleeved outside the outer nested drill rod core (2), and the inner diameter, close to one end of the steel pipe protective cylinder (9) is smaller than the maximum distance between two sides of the drill bit (1).
2. The quick well drilling device with the filter tube and the inner core drill rod separable according to claim 1, is characterized in that: the clamping bolt (7) is connected with the nested drill rod inner core (5) in a welding mode, and the diameter of the clamping bolt hole (4) is larger than that of the clamping bolt (7).
3. The quick well drilling device with the filter tube and the inner core drill rod separable according to claim 1, is characterized in that: the drill bit (1) is provided with an external thread (11), the end part of the outer core (2) of the nested drill rod is provided with an internal thread (12), and the drill bit (1) and the outer core (2) of the nested drill rod are fixedly connected through the matching of the external thread (11) and the internal thread (12).
4. The quick well drilling device with the filter tube and the inner core drill rod separable according to claim 1, is characterized in that: the outer side wall, far away from drill bit (1) one end, of nested drilling rod inner core (5) is provided with an overlap joint platform (6), the end portion of nested drilling rod inner core (5) at nested drilling rod outer core (2) is overlapped through the overlap joint platform (6), the diameter of the overlap joint platform (6) is equal to the outer diameter of the nested drilling rod outer core (2), a plurality of first socket joint grooves (13) distributed in a circumferential mode are arranged on the overlap joint platform (6), a first socket joint connecting sheet (14) is formed between every two adjacent first socket joint grooves (13), one section, close to the overlap joint platform (6), of the nested drilling rod outer core (2) is provided with a plurality of second socket joint grooves (15) distributed in a circumferential mode, a second socket joint sheet (16) is formed between every two adjacent second socket joint grooves (15), when the nested drilling rod outer core (2) is connected with the nested drilling rod inner core (5), the first socket joint connecting sheet (14) is inserted into the corresponding second socket joint groove (15), the second socket joint sheet (16) is inserted into the corresponding first socket joint groove (13), and the nested drilling rod inner core (2) can not rotate when any nested drilling rod outer core (5) is connected with another nested drilling rod inner core, and the nested drilling rod inner core (5) can not rotate.
5. The quick well drilling device with the filter tube and the inner core drill rod separable according to claim 1, is characterized in that: the filter holes (3) on the nested drill rod outer core (2) are bridge type filter holes.
6. The quick well drilling device with the filter tube and the inner core drill rod separable according to claim 1, is characterized in that: one end, far away from the drill bit (1), of the steel pipe protecting cylinder (9) is provided with a plurality of conventional steel pipe protecting cylinders (10) which are connected in sequence, and the end part of the first conventional steel pipe protecting cylinder (10) is fixedly connected with one end, far away from the drill bit (1), of the steel pipe protecting cylinder (9).
7. The quick well drilling device with the filter tube and the inner core drill rod separable according to claim 6, characterized in that: one end of the steel pipe pile casing (9) is provided with a first socket part (17), the inner diameter of the first socket part (17) is larger than that of the steel pipe pile casing (9), a bolt hole (18) and a plurality of socket connectors (19) are arranged on the first socket part (17), one end of the conventional steel pipe pile casing (10) is provided with a second socket part (20), the outer diameter of the second socket part (20) is equal to that of the first socket part (17), a bolt hole (18) and a socket connector (21) are arranged on the second socket part (20), when the second socket part (20) is inserted into the first socket part (17), the socket connector (21) is in inserted fit with the socket connector (19), and the bolt holes (18) in the first socket part (17) and the second socket part (20) are connected through bolts.
8. A well drilling method of a rapid well drilling device with a filter tube and an inner core drill rod which are separable according to any one of claims 1 to 7, which is characterized by comprising the following steps:
s1: determining typical soil layer distribution of a field according to geological survey data, and determining the lengths of a steel pipe casing (9), an outer core (2) of an embedded drill rod and an inner core (5) of the embedded drill rod of the rapid well drilling device according to the soil layer distribution;
s2: connecting a drill bit (1) with the nested drill rod outer core (2), and mutually positioning and connecting the nested drill rod inner core (5) with the nested drill rod outer core (2);
s3: when the drilling machine works, a drill bit (1) carries the nested drill rod inner core (5) and the nested drill rod outer core (2) to drill downwards to form a dewatering well hole, then a steel pipe casing (9) is hung to the upper end of the drill bit (1) and sinks synchronously along with the drill bit (1);
s4: continuing to drill downwards, and sequentially increasing a conventional steel pipe protective cylinder (10) and an integrated drill rod (8) from bottom to top until the nested drill rod inner core (5) and the nested drill rod outer core (2) reach a water-bearing stratum of target rainfall;
s5: the integrated drill rod (8) is pulled upwards, the drill bit (1) upwards contacts the steel pipe casing (9) along with the nested drill rod inner core (5) and the nested drill rod outer core (2), and the drill bit (1) is blocked by the steel pipe casing (9) and cannot continuously move upwards; continuously pulling up, wherein a clamping bolt (7) at the joint of the nested drill rod inner core (5) and the nested drill rod outer core (2) is damaged by stress, the nested drill rod inner core (5) moves upwards along with the integrated drill rod (8), and the drill bit (1) and the nested drill rod outer core (2) are kept in situ; upwards pulling the nested drill rod inner core (5), and stopping upwards pulling when the nested drill rod inner core (5) is about to be separated from the nested drill rod outer core (2);
s6: after the operation is finished, the integrated drill rod (8) and the nested drill rod inner core (5) are regarded as a precipitation well pipe, the nested drill rod outer core (2) is regarded as a precipitation well filter screen segment, and the drill bit (1) is regarded as a precipitation well bottom sealing;
s7: a water pump is lowered in the dewatering well casing, and the dewatering well works normally;
s8: after the dewatering well is used, the well drilling device is pulled out and recovered, and can be reused after being washed;
s9: and (7) backfilling the precipitation well hole.
9. The well drilling method of the rapid well drilling device with the filter tube and the inner core drill rod separable according to claim 7, characterized in that: when the nested drill rod inner core (5) and the nested drill rod outer core (2) are positioned and connected with each other in the S2, the clamping bolt (7) is inserted into the clamping bolt hole (4), and one end, inserted into the clamping bolt hole (4), of the clamping bolt (7) is welded with the nested drill rod inner core (5).
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