CN113250619A - Drilling tool switching assembly and rotary jet drilling tool - Google Patents
Drilling tool switching assembly and rotary jet drilling tool Download PDFInfo
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- CN113250619A CN113250619A CN202110692039.4A CN202110692039A CN113250619A CN 113250619 A CN113250619 A CN 113250619A CN 202110692039 A CN202110692039 A CN 202110692039A CN 113250619 A CN113250619 A CN 113250619A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Earth Drilling (AREA)
Abstract
The invention discloses a drilling tool switching assembly and a rotary jetting drilling tool.A second inner connecting sleeve is inserted in an outer connecting sleeve, and a nozzle assembly is inserted in the outer connecting sleeve and the second inner connecting sleeve along the radial direction; a seventh channel is arranged between the second inner connecting sleeve and the outer connecting sleeve, and the bottom of the seventh channel is provided with a plugging structure; the center of the upper part of the second inner connecting sleeve is provided with an eighth channel. The switching assembly conducts the outer channel and the inner channel of the drill rod assembly, simultaneously blocks the middle channel of the drill rod assembly, switches the three channels of the drill rod assembly into two-channel output, achieves the purpose of performing two-channel construction by using the three-channel drill rod assembly, expands the two-channel application of the three-channel drill rod assembly, enables the three-channel drill rod assembly to be simultaneously applied to three-channel construction and two-channel construction, simplifies the replacement procedure of a drilling tool, reduces the time for assembling and disassembling the drilling tool, reduces the construction cost, shortens the working hours and improves the construction efficiency.
Description
Technical Field
The invention relates to the technical field of drilling tools of drilling machines, in particular to a drilling tool switching assembly and a rotary jetting drilling tool.
Background
The rotary spraying construction method is that a drilling machine is used for drilling, slurry is sprayed out from a high-pressure nozzle at a high speed through a high-pressure generating device to form a liquid flow with highly concentrated energy, and soil bodies are directly damaged.
The common high-pressure rotary jet drilling tool comprises a single drilling tool, a double drilling tool and a triple drilling tool. The single drilling tool is a single channel, and only one medium (such as mud) can be transmitted in one construction. The dual drilling tool has double channels and can simultaneously transmit two media (such as gas and mud). For rotary jetting construction with large pile diameter and high pile quality requirement, a triple drilling tool is usually adopted, and the triple drilling tool is provided with three channels and can simultaneously transmit three media (such as slurry, water and gas). In the prior art, a double drilling tool adopts a drilling rod component and a joint component with double channels, a triple drilling tool adopts a drilling rod component and a joint component with three channels, the drilling rod component and the joint component of the double drilling tool and the triple drilling tool cannot be directly interchanged for use, when the drilling tools are switched according to different construction requirements, a whole set of double drilling tool or triple drilling tool comprising the drilling rod component and the joint component need to be dismounted together, and then the other drilling tool is replaced, the replacing procedure of the drilling tool is complicated, the time spent is long, so that the construction cost is increased, and the construction working hours are prolonged; and each set of double drilling tool and triple drilling tool need to be equipped with matched drilling rod components and joint components separately, and need purchase or prepare materials separately, independent production, can occupy great stock space and production resource like this, spare part cost, manufacturing cost are higher.
Disclosure of Invention
The applicant provides a drilling tool switching assembly and a rotary jetting drilling tool with a reasonable structure aiming at the defects of the conventional rotary jetting drilling tool, and the three channels of the drilling rod assembly are switched into the two channels through the switching assembly, so that the construction requirements of the two-channel drilling tool are met by the three-channel drilling rod assembly, the replacement procedure of the drilling tool is simplified, the disassembly and assembly time is reduced, the construction cost is reduced, the working hours are shortened, and the part cost and the production cost are reduced.
The technical scheme adopted by the invention is as follows:
a drilling tool switching component is characterized in that a second inner connecting sleeve is inserted into an outer connecting sleeve, and a nozzle component is inserted into the outer connecting sleeve and the second inner connecting sleeve in a radial direction; a seventh channel is arranged between the second inner connecting sleeve and the outer connecting sleeve, and the bottom of the seventh channel is provided with a plugging structure; the center of the upper part of the second inner connecting sleeve is provided with an eighth channel with an open top surface and a closed bottom surface; the circumferential wall surface of the second inner connecting sleeve is provided with a radial through hole, the nozzle assembly is inserted in the radial through hole, and the nozzle assembly is respectively communicated with the seventh channel and the eighth channel.
As a further improvement of the above technical solution:
the second inner connecting sleeve is provided with a first shaft part, a second shaft part and a third shaft part with the outer diameters decreasing in sequence, and the outer diameter of the third shaft part is equivalent to the inner diameter of the outer connecting sleeve; the first shaft part is sleeved with a first inner connecting sleeve, a plurality of through shunting holes are formed between the first inner connecting sleeve and the outer connecting sleeve, an annular gap is formed between the second shaft part and the outer connecting sleeve, and the annular gap is communicated with the shunting holes to form a seventh channel; the third shaft part forms a blocking structure and is blocked at the bottom of the seventh channel.
A plurality of sealing rings are arranged between the matching surfaces of the third shaft part and the outer connecting sleeve for sealing; the third shaft portion further has a fourth shaft portion on a lower side thereof, and an outer diameter of the fourth shaft portion is smaller than an outer diameter of the third shaft portion.
The upper part of the eighth channel is provided with a counter bore.
The bottom of the second inner connecting sleeve is axially inserted with a core pipe.
A rotary jetting drilling tool adopts the drilling tool switching assembly, and a drilling rod assembly, a lower joint assembly and a switching assembly are sequentially connected; the drill rod component is of a three-layer pipe structure and comprises an outer pipe, a middle pipe and an inner pipe; the drill rod assembly is internally provided with three channels, an outer channel is arranged between the outer pipe and the middle pipe, an intermediate channel is arranged between the middle pipe and the inner pipe, and an inner channel is arranged in the center of the inner pipe; the lower joint assembly comprises a lower outer joint, a first lower inner joint and a second lower inner joint, a communicated fourth channel is arranged between the lower outer joint and the first lower inner joint, and the fourth channel is communicated with the outer channel; a through fifth channel is arranged between the first lower inner joint and the second lower inner joint and is communicated with the middle channel; the center of the second lower inner joint is provided with a through sixth channel which is communicated with the inner channel; the upper end part of the outer connecting sleeve of the switching assembly is fixedly connected to the lower outer joint, the upper part of the first inner connecting sleeve is sleeved on the lower part of the first lower inner joint, the lower part of the second lower inner joint is inserted into an eighth channel of the second inner connecting sleeve, the seventh channel is communicated with the fourth channel, and the eighth channel is communicated with the sixth channel; the first shaft part of the second inner connecting sleeve is inserted between the second lower inner joint and the first inner connecting sleeve, and the first shaft part is blocked at the bottom of the fifth channel.
As a further improvement of the above technical solution:
the lower end of the switching assembly is connected with a drill bit assembly, the drill bit assembly comprises a drill bit body and an inner sleeve inserted in the drill bit body, the drill bit body is fixedly connected to an outer connecting sleeve, and a core tube is inserted in the inner sleeve.
The upper end part of the drill rod component is connected with an upper joint component, and the upper joint component comprises an upper outer joint, a first upper inner joint, a second upper inner joint and a third upper inner joint; the upper part of the upper outer joint is a connecting part, a first channel is arranged between the upper outer joint and the first upper inner joint, and the first channel is communicated with the outer channel; a second channel is arranged between the first upper inner joint and the second upper inner joint and is communicated with the middle channel; the third upper inner joint is provided with a third channel at the center, and the third channel is communicated with the inner channel.
And a plurality of sealing rings are respectively arranged among the matching surfaces of the second lower inner joint, the first inner connecting sleeve and the second inner connecting sleeve for sealing, and a plurality of sealing rings are also arranged among the matching surfaces of the first inner connecting sleeve and the first lower inner joint for sealing.
The lower part of the second lower inner joint is inserted into the counter bore of the second inner connecting sleeve.
The invention has the following beneficial effects:
according to the invention, the switching assembly conducts the outer channel and the inner channel of the drill rod assembly, simultaneously blocks the middle channel of the drill rod assembly, switches three channels of the drill rod assembly into two-channel output, realizes the purpose of performing two-channel construction by using the three-channel drill rod assembly, expands the two-channel application of the three-channel drill rod assembly, enables the three-channel drill rod assembly to be simultaneously applied to three-channel construction and two-channel construction, and can perform corresponding construction only by dismounting the switching assembly and the drill rod assembly and replacing corresponding assemblies when switching the drill tools according to different construction requirements, thereby simplifying the replacement procedure of the drill tools, reducing the time for dismounting the drill tools, reducing the construction cost, shortening the working hours and improving the construction efficiency; and because the drill rod component can be commonly used for three-channel and two-channel construction, one set of drill rod component can be simultaneously used by a three-channel drilling tool and a two-channel drilling tool, the demand of the drill rod component is reduced, the occupation of inventory space and production resources is reduced, and the cost of parts and production cost are reduced.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a top view of the present invention.
Fig. 4 is a sectional view taken along line B-B of fig. 3.
Fig. 5 is an enlarged view of a portion C in fig. 4.
Fig. 6 is an enlarged view of a portion D in fig. 4.
FIG. 7 is a perspective view of a second inner coupling sleeve.
In the figure: 100. an upper joint assembly; 1. an upper outer joint; 2. a first upper inner joint; 3. a second upper inner joint; 4. a third upper inner joint; 18. a first channel; 19. a second channel; 20. a third channel; 30. a connecting portion;
200. a drill rod assembly; 5. an outer tube; 6. a middle tube; 7. an inner tube; 21. an outer channel; 22. a middle channel; 23. an inner channel;
300. a lower adapter assembly; 8. a lower outer joint; 9. a first lower inner joint; 10. a second lower inner joint; 24. a fourth channel; 25. a fifth channel; 26. a sixth channel;
400. a switching component; 11. an outer connecting sleeve; 12. a first inner connecting sleeve; 13. a second inner connecting sleeve; 14. a core tube; 15. a nozzle assembly; 27. a seventh channel; 28. an eighth channel; 281. a counter bore; 29. a radial through hole; 131. a first shaft portion; 132. a second shaft portion; 133. a third shaft portion; 134. a fourth shaft portion;
500. a drill bit assembly; 16. a bit body; 17. an inner sleeve.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 4, the present invention includes, in order from top to bottom, an upper joint assembly 100, a drill rod assembly 200, a lower joint assembly 300, a switching assembly 400, and a drill bit assembly 500; the upper joint assembly 100 and the lower joint assembly 300 are respectively connected to the upper end and the lower end of the drill rod assembly 200, the lower joint assembly 300 is connected to the upper end of the switching assembly 400, and the lower end of the switching assembly 400 is connected to the drill bit assembly 500.
As shown in fig. 2 to 4, the upper joint assembly 100 includes an upper outer joint 1, a first upper inner joint 2, a second upper inner joint 3, and a third upper inner joint 4. The upper part of the upper outer joint 1 is provided with a connecting part 30 which is used for connecting with a slewing gear; the first upper inner joint 2 is inserted in the upper outer joint 1, a plurality of gaps are axially arranged on the outer cylindrical surface of the first upper inner joint 2, and a plurality of through first channels 18 are formed between the outer circumferential surface of the first upper inner joint 2 and the inner circumferential surface of the upper outer joint 1; the second upper inner joint 3 is inserted in the first upper inner joint 2, a plurality of raised key teeth are arranged on the outer cylindrical surface of the second upper inner joint 3 along the circumferential direction, and a through second channel 19 is formed between two adjacent key teeth and the inner circumferential surface of the first upper inner joint 2; the upper part of the third upper nipple 4 is inserted in the second upper nipple 3, and the center of the third upper nipple 4 has a third through passage 20.
As shown in fig. 2 and 4, the drill rod assembly 200 is a coaxial three-layer tube structure, which comprises an outer tube 5, a middle tube 6 and an inner tube 7 from outside to inside; the drill rod assembly 200 is internally provided with three channels, an annular gap between the inner circumferential surface of the outer tube 5 and the outer circumferential surface of the middle tube 6 forms an outer channel 21, an annular gap between the inner circumferential surface of the middle tube 6 and the outer circumferential surface of the inner tube 7 forms a middle channel 22, and the center of the inner tube 7 is provided with a through inner channel 23. As shown in fig. 4 and 5, the outer pipe 5 is fixed to the upper outer joint 1 by screw connection, the middle pipe 6 is inserted into the first upper inner joint 2, the inner pipe 7 is sleeved on the periphery of the lower part of the third upper inner joint 4, the first channel 18 is communicated with the outer channel 21, the second channel 19 is communicated with the middle channel 22, and the third channel 20 is communicated with the inner channel 23.
As shown in fig. 2 and 4, the lower joint assembly 300 includes a lower outer joint 8, a first lower inner joint 9, and a second lower inner joint 10. The first lower inner joint 9 is inserted in the lower outer joint 8, and a through fourth channel 24 is arranged between the first lower inner joint 9 and the lower outer joint 8; the second lower inner joint 10 is inserted in the first lower inner joint 9, and a through fifth channel 25 is arranged between the second lower inner joint 10 and the first lower inner joint 9; the second lower nipple 10 is centrally provided with a through sixth channel 26. As shown in fig. 4 and 6, the lower outer joint 8 is fixedly connected to the lower end portion of the outer pipe 5 by a screw, the first lower inner joint 9 is fitted to the lower end portion of the middle pipe 6, the second lower inner joint 10 is inserted to the lower end portion of the inner pipe 7, the fourth passage 24 communicates with the outer passage 21, the fifth passage 25 communicates with the middle passage 22, and the sixth passage 26 communicates with the inner passage 23.
As shown in fig. 2, 4 and 6, the switching assembly 400 includes an outer connecting sleeve 11, a first inner connecting sleeve 12, a second inner connecting sleeve 13, a core tube 14 and a nozzle assembly 15. As shown in fig. 4 and 6, the first inner connecting sleeve 12 and the second inner connecting sleeve 13 are inserted into the outer connecting sleeve 11, and the lower portion of the first inner connecting sleeve 12 is sleeved on the upper portion of the second inner connecting sleeve 13; the core tube 14 is axially inserted into the bottom of the second inner connecting sleeve 13, and the nozzle assemblies 15 are radially inserted into the outer connecting sleeve 11 and the second inner connecting sleeve 13. As shown in fig. 7, the second inner connecting sleeve 13 includes a first shaft portion 131, a second shaft portion 132, a third shaft portion 133 and a fourth shaft portion 134 from top to bottom, the outer diameters of the first shaft portion 131, the second shaft portion 132 and the third shaft portion 133 decrease in sequence, the outer diameter of the fourth shaft portion 134 is smaller than the outer diameter of the third shaft portion 133, and the outer diameter of the third shaft portion 133 is equal to the inner diameter of the outer connecting sleeve 11. The lower part of the first inner connecting sleeve 12 is sleeved on the first shaft part 131, a plurality of gaps are arranged on the outer cylindrical surface of the first inner connecting sleeve 12 along the axial direction, and a plurality of through shunting holes are formed between the outer circumferential surface of the first inner connecting sleeve 12 and the inner circumferential surface of the outer connecting sleeve 11; an annular gap is formed between the outer peripheral surface of the second shaft part 132 and the inner peripheral surface of the outer connecting sleeve 11, and the annular gap is communicated with the shunting hole of the first inner connecting sleeve 12 to form a seventh channel 27; the third shaft part 133 forms a blocking structure and blocks the bottom of the seventh channel 27, and a plurality of sealing rings are arranged between the matching surfaces of the third shaft part 133 and the outer connecting sleeve 11 for sealing. As shown in fig. 2, 4 and 6, an eighth passage 28 is formed in the center of the upper portion of the second inner connecting sleeve 13, the eighth passage 28 is a blind hole with an open top surface and a closed bottom surface, and a counter bore 281 is formed in the upper portion of the eighth passage 28. Radial through holes 29 are symmetrically formed in the circumferential wall surfaces of the second shaft portion 132 of the second inner connecting sleeve 13 on two opposite sides, and the radial through holes 29 communicate the seventh channel 27 and the eighth channel 28. The nozzle assembly 15 is inserted into the radial through hole 29 and communicates with the seventh passage 27 and the eighth passage 28, respectively. As shown in fig. 4 and 6, the upper end of the outer connecting sleeve 11 is fixed to the lower outer joint 8 by screwing, the upper part of the first inner connecting sleeve 12 is sleeved on the lower part of the first lower inner joint 9, the lower part of the second lower inner joint 10 is inserted into the counterbore 281 of the second inner connecting sleeve 13, the seventh passage 27 is communicated with the fourth passage 24 and then communicated with the outer passage 21, and the eighth passage 28 is communicated with the sixth passage 26 and then communicated with the inner passage 23; the first shaft portion 131 of the second inner joint sleeve 13 is inserted between the second lower inner joint 10 and the first inner joint sleeve 12, and the first shaft portion 131 constitutes a blocking structure to block the bottom of the fifth passage 25, so that the fifth passage 25 (i.e., the middle passage 22) is blocked. A plurality of sealing rings are respectively arranged among the matching surfaces of the second lower inner joint 10, the first inner connecting sleeve 12 and the second inner connecting sleeve 13 for sealing, and a plurality of sealing rings are also arranged among the matching surfaces of the first inner connecting sleeve 12 and the first lower inner joint 9 for sealing. The switching assembly 400 conducts the outer channel 21 and the inner channel 23 of the drill rod assembly 200 through the connecting sleeve, simultaneously blocks the middle channel 22 of the drill rod assembly 200, switches three channels of the drill rod assembly 200 into dual-channel output, achieves the purpose of performing dual-channel construction by using the three-channel drill rod assembly 200, expands the dual-channel application of the three-channel drill rod assembly 200, enables the three-channel drill rod assembly 200 to be simultaneously applied to three-channel construction and dual-channel construction, does not need to be disassembled when drilling tools are switched according to different construction requirements, and can perform corresponding construction only by disassembling the switching assembly 400 and the drill rod assembly 500 and replacing corresponding assemblies, simplifies the replacing procedures of the drilling tools, reduces the time for disassembling and assembling the drilling tools, reduces the construction cost, shortens the working hours and improves the construction efficiency; and because the drill rod assembly 200 can be used for three-channel and two-channel construction, one set of drill rod assembly 200 can be used for three-channel drilling tools and two-channel drilling tools at the same time, the demand of the drill rod assembly 200 is reduced, the occupation of inventory space and production resources is reduced, and the part cost and the production cost are reduced.
As shown in fig. 4, the drill bit assembly 500 includes a bit body 16 and an inner sleeve 17 inserted into the bit body 16, the bit body 16 is fixed to the outer connecting sleeve 11 of the switching assembly 400 by means of screw connection, and the core tube 14 of the switching assembly 400 is inserted into the inner sleeve 17.
In actual use, the upper joint assembly 100 is connected to the rotating device through the connecting part 30, high-pressure slurry is input from the third channel 20, is transmitted to the nozzle assembly 15 through the inner channel 23, the sixth channel 26 and the eighth channel 28, and is sprayed out of the nozzle assembly 15; high-pressure air is input from the first channel 18, is transmitted to the nozzle assembly 15 through the outer channel 21, the fourth channel 24 and the seventh channel 27, and is sprayed out of the nozzle assembly 15; the high pressure slurry discharged from the nozzle assembly 15 is joined with high pressure water to perform a double rotary spraying operation.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the invention may be modified in any manner without departing from the spirit thereof.
Claims (10)
1. A drilling tool switching assembly, characterized by: a second inner connecting sleeve (13) is inserted into the outer connecting sleeve (11), and a nozzle assembly (15) is inserted into the outer connecting sleeve (11) and the second inner connecting sleeve (13) in a radial direction; a seventh channel (27) is arranged between the second inner connecting sleeve (13) and the outer connecting sleeve (11), and the bottom of the seventh channel (27) is provided with a plugging structure; the center of the upper part of the second inner connecting sleeve (13) is provided with an eighth channel (28) with an open top surface and a closed bottom surface; the circumferential wall surface of the second inner connecting sleeve (13) is provided with a radial through hole (29), the nozzle assembly (15) is inserted into the radial through hole (29), and the nozzle assembly (15) is respectively communicated with the seventh channel (27) and the eighth channel (28).
2. The tool switching assembly of claim 1 wherein: the second inner connecting sleeve (13) is provided with a first shaft part (131), a second shaft part (132) and a third shaft part (133) with the outer diameters decreasing in sequence, and the outer diameter of the third shaft part (133) is equivalent to the inner diameter of the outer connecting sleeve (11); the first shaft part (131) is sleeved with a first inner connecting sleeve (12), a plurality of through shunting holes are formed between the first inner connecting sleeve (12) and the outer connecting sleeve (11), an annular gap is formed between the second shaft part (132) and the outer connecting sleeve (11), and the annular gap is communicated with the shunting holes to form a seventh channel (27); the third shaft portion (133) constitutes a blocking structure and blocks the bottom of the seventh channel (27).
3. The tool switching assembly of claim 2, wherein: a plurality of sealing rings are arranged between the matching surfaces of the third shaft part (133) and the outer connecting sleeve (11) for sealing; a fourth shaft part (134) is further provided below the third shaft part (133), and the outer diameter of the fourth shaft part (134) is smaller than the outer diameter of the third shaft part (133).
4. The tool switching assembly of claim 1 wherein: the upper part of the eighth channel (28) is provided with a counter bore (281).
5. The tool switching assembly of claim 1 wherein: the bottom of the second inner connecting sleeve (13) is inserted with a core pipe (14) along the axial direction.
6. A rotary jetting drilling tool is characterized in that: the drill tool switching assembly according to any one of claims 1 to 5, wherein the drill rod assembly (200), the lower adapter assembly (300) and the switching assembly (400) are connected in sequence;
the drill rod assembly (200) is of a three-layer pipe structure and comprises an outer pipe (5), a middle pipe (6) and an inner pipe (7); the drill rod component (200) is internally provided with three channels, an outer channel (21) is arranged between the outer tube (5) and the middle tube (6), a middle channel (22) is arranged between the middle tube (6) and the inner tube (7), and the center of the inner tube (7) is provided with an inner channel (23);
the lower joint assembly (300) comprises a lower outer joint (8), a first lower inner joint (9) and a second lower inner joint (10), a through fourth channel (24) is arranged between the lower outer joint (8) and the first lower inner joint (9), and the fourth channel (24) is communicated with the outer channel (21); a through fifth channel (25) is arranged between the first lower inner joint (9) and the second lower inner joint (10), and the fifth channel (25) is communicated with the middle channel (22); the center of the second lower inner joint (10) is provided with a through sixth channel (26), and the sixth channel (26) is communicated with the inner channel (23);
the upper end of an outer connecting sleeve (11) of the switching assembly (400) is fixedly connected to a lower outer joint (8), the upper part of a first inner connecting sleeve (12) is sleeved to the lower part of a first lower inner joint (9), the lower part of a second lower inner joint (10) is inserted into an eighth channel (28) of a second inner connecting sleeve (13), a seventh channel (27) is communicated with a fourth channel (24), and the eighth channel (28) is communicated with a sixth channel (26); the first shaft part (131) of the second inner connecting sleeve (13) is inserted between the second lower inner joint (10) and the first inner connecting sleeve (12), and the first shaft part (131) is blocked at the bottom of the fifth channel (25).
7. The jet grouting drill tool according to claim 6, characterized in that: the lower end part of the switching assembly (400) is connected with a drill bit assembly (500), the drill bit assembly (500) comprises a drill bit body (16) and an inner sleeve (17) inserted in the drill bit body (16), the drill bit body (16) is fixedly connected to an outer connecting sleeve (11), and a core pipe (14) is inserted in the inner sleeve (17).
8. The jet grouting drill tool according to claim 6, characterized in that: the upper end part of the drill rod component (200) is connected with an upper joint component (100), and the upper joint component (100) comprises an upper outer joint (1), a first upper inner joint (2), a second upper inner joint (3) and a third upper inner joint (4); the upper part of the upper outer joint (1) is provided with a connecting part (30), a first channel (18) is arranged between the upper outer joint (1) and the first upper inner joint (2), and the first channel (18) is communicated with the outer channel (21); a second channel (19) is arranged between the first upper inner joint (2) and the second upper inner joint (3), and the second channel (19) is communicated with the middle channel (22); the third upper inner joint (4) is provided with a third channel (20) in the center, and the third channel (20) is communicated with the inner channel (23).
9. The jet grouting drill tool according to claim 6, characterized in that: a plurality of sealing rings are respectively arranged among the matching surfaces of the second lower inner joint (10), the first inner connecting sleeve (12) and the second inner connecting sleeve (13) for sealing, and a plurality of sealing rings are also arranged among the matching surfaces of the first inner connecting sleeve (12) and the first lower inner joint (9) for sealing.
10. The jet grouting drill tool according to claim 6, characterized in that: the lower part of the second lower inner joint (10) is inserted into a counter bore (281) of the second inner connecting sleeve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692039.4A CN113250619A (en) | 2021-06-22 | 2021-06-22 | Drilling tool switching assembly and rotary jet drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692039.4A CN113250619A (en) | 2021-06-22 | 2021-06-22 | Drilling tool switching assembly and rotary jet drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113250619A true CN113250619A (en) | 2021-08-13 |
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ID=77189128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110692039.4A Pending CN113250619A (en) | 2021-06-22 | 2021-06-22 | Drilling tool switching assembly and rotary jet drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113250619A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117248825A (en) * | 2023-10-25 | 2023-12-19 | 无锡市安曼工程机械有限公司 | Dual shunt of top drive drilling machine |
-
2021
- 2021-06-22 CN CN202110692039.4A patent/CN113250619A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117248825A (en) * | 2023-10-25 | 2023-12-19 | 无锡市安曼工程机械有限公司 | Dual shunt of top drive drilling machine |
| CN117248825B (en) * | 2023-10-25 | 2024-03-12 | 无锡市安曼工程机械有限公司 | Dual shunt of top drive drilling machine |
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