CN221722748U - Double-channel internal deslagging reverse circulation drilling system - Google Patents
Double-channel internal deslagging reverse circulation drilling system Download PDFInfo
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- CN221722748U CN221722748U CN202420860169.3U CN202420860169U CN221722748U CN 221722748 U CN221722748 U CN 221722748U CN 202420860169 U CN202420860169 U CN 202420860169U CN 221722748 U CN221722748 U CN 221722748U
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- 238000005553 drilling Methods 0.000 title claims abstract description 34
- 239000002893 slag Substances 0.000 claims abstract description 132
- 238000007599 discharging Methods 0.000 claims abstract description 104
- 230000007704 transition Effects 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000007667 floating Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a double-channel internal deslagging reverse circulation drilling system, which comprises: the device comprises a bracket, a driving device, a medium guide cover and a slag discharge transition joint; the driving device includes: the device comprises a front driving unit, a rear driving unit, a slag discharging shaft, a driving output connector and a connector connecting seat; the slag discharging shaft is communicated with the space in the shaft of the rear driving output shaft to form a slag discharging channel for slag discharging; a medium channel for guiding medium is formed between the inner surface of the front driving output shaft and the outer surface of the slag discharging shaft. The structure design of the utility model forms internal circulation type slag discharge, namely, the medium is led into the outer channel of the system by the medium leading-in cover, and the medium and slag in the inner channel are discharged by the slag discharge transition joint, so that compared with the existing structure, the utility model has larger slag discharge space and reduces the blocking risk; the structural design is more reasonable, so that the problem that slag is easy to accumulate at a slag discharging structure at present is solved; the floating shaft is replaced, and inconvenience in disassembly and assembly of the drill rod caused by front-back shrinkage is avoided.
Description
Technical Field
The utility model relates to the technical field of drilling machines, in particular to a double-channel internal deslagging reverse circulation drilling system.
Background
Drilling construction often causes jamming and even breaking of threaded connection, because the drill rod is assembled by a hollow steel pipe, media enter from a central through hole, materials drilled down are discharged along a gap between the outer surface of the steel pipe and the drilling hole, and the drilling hole is damaged by flowing of the media and the materials, so that the drilling hole is enlarged and deviated, and the fault is caused.
In order to solve the above problems, a dual-channel drill rod and a dual-drive power system for driving the dual-channel drill rod to rotate are proposed by a person skilled in the art, the application number is 202220609044.4, and when the dual-drive power system is in operation, a medium enters from an inner channel and is discharged from an outer channel along with slag, so that damage of materials and the medium under drilling to drilling is reduced, and the construction size and accuracy of the drilling can be ensured. However, the existing double-drive power system adopts external circulation type slag discharging, namely, the medium and slag are discharged from the outside of a slag discharging shaft, the slag discharging space of an external circulation type slag discharging structure is smaller, massive particles are easy to clamp at the slag discharging space, and the slag discharging structure is blocked to form a bottleneck. In addition, the production can be met by the slag collecting device which is limited by the structure of the slag collecting device and the internal and external driving units and is easy to accumulate materials, the risk of system blockage is further improved, and finally the equipment cannot be normally used and even is stopped to stop production to influence the construction progress.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a double-channel internal deslagging reverse circulation drilling system. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The utility model adopts the following technical scheme:
provided is a dual-channel internal deslagging reverse circulation drilling system, which comprises: the device comprises a driving device, a medium guide cover and a slag discharge transition joint;
The driving device includes: a rear driving output shaft, a front driving output shaft and a slag discharging shaft;
The slag discharging shaft is arranged at the front end of the rear driving output shaft, the slag discharging shaft is communicated with the intra-shaft space of the rear driving output shaft to form a slag discharging channel for slag discharging, and the rear end of the rear driving output shaft is provided with a slag discharging transition joint communicated with the slag discharging channel;
the front driving output shaft is sleeved outside the slag discharging shaft, a medium channel for guiding in a medium is formed between the inner surface of the front driving output shaft and the outer surface of the slag discharging shaft, and the medium guiding cover is communicated with the medium channel.
Further, the inner surface of the slag discharging shaft is provided with spiral slag discharging blades.
Further, the driving device further includes: a joint connecting seat; the slag discharging transition joint is an arc-shaped pipeline and is arranged on the joint connecting seat; the joint connecting seat is sleeved outside the rear end of the rear driving output shaft, and a sealing ring is arranged between the joint connecting seat and the rear driving output shaft.
Further, the driving device further includes: a rear driver, a rear driver driving gear and a rear driver driven gear which are meshed with each other; the rear driver driving gear is arranged on a power output shaft of the rear driver, and the rear driver driven gear is arranged on the outer wall of the rear driving output shaft.
Further, the driving device further includes: driving the output connector; the driving output connector is arranged at the front end of the front driving output shaft, and the driving output connector is sleeved outside the slag discharging shaft.
Further, the driving device further includes: a front driver, a front driver driving gear and a front driver driven gear which are meshed with each other; the front driver driving gear is arranged on a power output shaft of the front driver, and the front driver driven gear is arranged on the outer wall of the front driver output shaft.
Further, the driving device further includes: a front drive unit housing and a front drive unit rear end bearing cover; the front driver is arranged on the front driving unit shell; the medium guide cover is arranged on the bearing cover at the rear end of the front driving unit; the medium guiding cover is sleeved outside the rear section of the slag discharging shaft; the front driving output shaft is sleeved outside the middle section of the slag discharging shaft; the driving output connection sleeve is sleeved outside the front section of the slag discharging shaft.
Further, the two-channel internal deslagging reverse circulation drilling system further comprises: the driving device drives the rotating double-channel drill rod; the dual-channel drill pipe comprises: an outer drill rod and an inner drill rod arranged inside the outer drill rod; the inner drill rod is connected with the slag discharging shaft; the outer drill rod is connected with the driving output connector.
Further, the outer wall of the front end of the slag discharging shaft is provided with a slag discharging shaft transmission external spline and an external sealing surface which are matched with the inner drill rod, and the inner wall of the rear end of the slag discharging shaft is provided with a slag discharging shaft transmission internal spline and an internal sealing surface which are matched with the rear driving output shaft.
Further, the two-channel internal deslagging reverse circulation drilling system further comprises: a bracket; the driving device further includes: a rear drive unit housing and a rear drive unit rear end bearing cover; the rear driver is arranged on the rear driving unit shell; the joint connecting seat is arranged on the bearing cover at the rear end of the rear driving unit; the front driving unit shell and the rear driving unit shell are both arranged on the bracket.
The utility model has the beneficial effects that:
1. The structure design of the application forms internal circulation type slag discharge, namely, the medium is led into the outer channel of the system by the medium leading-in cover, and the medium and slag in the inner channel are discharged by the slag discharge transition joint, so that compared with the existing structure, the application has larger slag discharge space and reduces the blocking risk;
2. the slag is discharged by utilizing the internal space of the slag discharging shaft and the rear driving output shaft and the slag discharging transition joint positioned behind the slag discharging shaft, so that the structural design is more reasonable, the problem that slag is easy to accumulate at a slag discharging structure at present is solved, and the blocking risk is further reduced;
3. The application utilizes the slag discharging shaft and the rear driving output shaft to drive the inner drill rod, and utilizes the driving output connector and the front driving output shaft to drive the outer drill rod, so as to replace the floating shaft in the prior art, and avoid the problem of inconvenient disassembly and assembly of the drill rod caused by front-back shrinkage.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dual-channel internal deslagging reverse circulation drilling system;
FIG. 2 is a schematic view of the external structure of the driving device of the present utility model;
FIG. 3 is a schematic view of the internal structure of the driving device of the present utility model;
FIG. 4 is a schematic diagram of the structure of the front drive unit of the present utility model;
FIG. 5 is a schematic view of the structure of the rear drive unit of the present utility model;
FIG. 6 is a schematic structural view of the slag discharging shaft of the present utility model;
FIG. 7 is a schematic view of the slag discharging transition joint of the present utility model;
fig. 8 is a schematic structural view of the driving output connector of the present utility model.
Detailed Description
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-8, in some illustrative embodiments, a dual pass in-slag reverse circulation drilling system is provided, comprising: the device comprises a driving device, a medium leading-in cover 3, a slag discharging transition joint 6, a bracket 7 and a double-channel drill rod.
The driving device includes: the slag discharging device comprises a front driving unit 1, a rear driving unit 2, a slag discharging shaft 4, a driving output connector 5 and a connector connecting seat 13.
The double-channel drill rod is driven to rotate by a driving device, and specifically comprises: the inner drill rod 42 is rotatable in the outer drill rod 41, a first channel 43 for conveying a medium is formed between the outer surface of the inner drill rod 42 and the inner surface of the outer drill rod 41, and a second channel 44 for deslagging is formed in the inner drill rod 42. The front driving unit 1 is used for driving the outer drill rod 41 to rotate, the rear driving unit 2 is used for driving the inner drill rod 42 to rotate, the plurality of double-channel drill rods are sequentially connected according to actual drilling conditions, and finally the whole drill rod is formed, and the driving device is used for driving and rotating the whole drill rod.
The rear drive unit 2 includes: rear drive 14, rear drive gear 15, rear drive driven gear 16, rear drive output shaft 17, rear drive unit housing 51, rear drive unit rear end bearing cover 53.
The rear drive unit housing 51 is sleeved outside the rear drive output shaft 17. One of the rear drive unit housing 51 functions as a motor mount for carrying the rear drive 14, i.e., the rear drive 14 is provided on the rear drive unit housing 51, and the other functions to realize rotational support of the rear drive output shaft 17 through a bearing. The joint connection seat 13 is provided on the rear end bearing cover 53 of the rear drive unit.
The rear driver driving gear 15 is provided on the power output shaft of the rear driver 14, the rear driver driven gear 16 is provided on the outer wall of the rear driver output shaft 17, and the rear driver driving gear 15 is meshed with the rear driver driven gear 16. In this embodiment, the rear driver 14 may be a motor, and in operation, the rear driver driving gear 15 disposed on the output shaft of the motor drives the rear driver driven gear 16 to rotate based on the driving force of the motor, so as to drive the rear driving output shaft 17 to rotate.
The slag discharging shaft 4 is arranged at the front end of the rear driving output shaft 17, and the inner drill rod 42 is connected with the slag discharging shaft 4, so that the rear driving unit 2 finally achieves the purpose of driving the inner drill rod 42 to rotate, and meanwhile, the slag discharging shaft 4 rotates to provide slag discharging power for slag.
As shown in fig. 7, the slag discharging transition joint 6 is an arc-shaped pipeline, and the slag discharging transition joint 6 is arranged on the joint connecting seat 13. The joint connection seat 13 is sleeved outside the rear end of the rear driving output shaft 17, and a sealing ring is arranged between the joint connection seat 13 and the rear driving output shaft 17, so that liquid leakage is avoided. Meanwhile, a bearing is further arranged between the joint connecting seat 13 and the rear driving output shaft 17, specifically, the outer ring of the bearing is connected with the inner wall of the joint connecting seat 13, and the inner ring of the bearing is connected with the outer wall of the rear end of the rear driving output shaft 17. The above-mentioned structural design makes the back drive output shaft 17 can not lead to arranging sediment transition joint 6 to follow the commentaries on classics when rotatory, firstly guarantees arranging sediment transition joint 6 job stabilization nature, and secondly is convenient for arrange sediment transition joint 6 and other pipeline butt joints, arranges sediment smoothly.
The front drive unit 1 includes: a front driver 8, a front driver driving gear 9, a front driver driven gear 10, a front drive output shaft 11, a front drive unit housing 52, a front drive unit rear end bearing cover 54.
The front drive unit housing 52 is sleeved outside the front drive output shaft 11. One of the front drive unit housing 52 functions as a motor mount, i.e., the front driver 8 is provided on the front drive unit housing 52, and the other functions to rotatably support the front drive output shaft 11 through a bearing. The medium introducing cover 3 is provided on the front drive unit rear end bearing cover 54.
The front driver driving gear 9 is provided on the power output shaft of the front driver 8, and the front driver driven gear 10 is provided on the outer wall of the front driver output shaft 11. The front drive pinion 9 meshes with a front drive driven pinion 10. The front driver 8 can be a motor, and when the front driver works, the front driver driving gear 9 is arranged on the output shaft of the motor, so that the purpose that the front driver 8 drives the front driver driving gear 9 to rotate is achieved, the front driver driven gear 10 is driven to rotate, and finally the front driver output shaft 11 is driven to rotate.
The drive output connector 5 is arranged at the front end of the front drive output shaft 11, and the outer drill rod 41 is connected with the drive output connector 5, namely, the purpose that the front drive unit 1 drives the outer drill rod 41 to rotate is achieved. In the embodiment, the rear driving output shaft 17 and the slag discharging shaft 4 are utilized to drive the inner drill rod 42 to rotate, the front driving output shaft 11 and the driving output connector 5 are utilized to drive the outer drill rod 41 to rotate, so that the floating shaft in the prior art is replaced, the problem that the drill rod is inconvenient to disassemble and assemble due to the front-back shrinkage of the driving system is avoided, and the double-channel drill rod is more convenient to assemble and disassemble, and the production efficiency is improved.
The front driving unit shell 52 and the rear driving unit shell 51 are arranged on the bracket 7, and the bracket 7 is convenient for installing the dual-channel internal deslagging reverse circulation drilling system of the embodiment on other supporting and conveying equipment so as to ensure the stability of the drilling system during working and facilitate transportation.
The slag discharging shaft 4 and the rear driving output shaft 17 in this embodiment are hollow structures, and the slag discharging shaft 4 is communicated with an intra-shaft space of the rear driving output shaft 17 to form a slag discharging passage for discharging slag.
Wherein, the interior of the slag discharging shaft 4 is provided with a slag discharging shaft inner channel 27, and the slag discharging shaft inner channel 27 is the inner shaft space of the slag discharging shaft 4; the rear drive output shaft 17 is internally provided with a rear drive output shaft internal passage 20, and the rear drive output shaft internal passage 20 is an internal shaft space of the rear drive output shaft 17.
The space in the slag discharging transition joint 6 is communicated with the internal channel 20 of the rear driving output shaft, namely communicated with the slag discharging channel; the second channel 44 inside the inner drill rod 42 is in communication with the slag discharging shaft inner channel 27, i.e. with the slag discharging channel, so that finally the second channel 44, the slag discharging channel and the space in the pipe of the slag discharging transition joint 6 together form an inner channel of the drilling system through which medium and slag are discharged.
The front driving output shaft 11 and the driving output connector 5 in this embodiment are hollow structures.
The front driving output shaft 11 is sleeved outside the slag discharging shaft 4, specifically, is sleeved outside the middle section of the slag discharging shaft 4, and a medium channel for guiding medium is formed between the inner surface of the front driving output shaft 11 and the outer surface of the slag discharging shaft 4, and is used as a second chamber 30.
The front driving output shaft 11 is internally provided with a front driving output shaft inner channel 12, the slag discharging shaft 4 sequentially passes through the medium guiding cover 3, the front driving output shaft inner channel 12 and the driving output connector 5 from the front end of the rear driving output shaft 17 to serve as a starting point, and is connected with the outer drill rod 41.
The medium introducing cover 3 is arranged at the rear end of the front driving unit shell 52, the medium introducing cover 3 is sleeved outside the rear section of the slag discharging shaft 4, meanwhile, a bearing is used for realizing rotary support, a medium inlet 28 is arranged on the medium introducing cover 3, and air or other liquid-phase medium is conveyed into the medium introducing cover 3 through the medium inlet 28. The medium introducing cover 3 is internally communicated with a medium channel, specifically, a first chamber 29 is formed between the cover inner wall of the medium introducing cover 3 and the outer wall of the slag discharging shaft 4, and the first chamber 29 is communicated with the medium channel.
The driving output connector 5 is sleeved outside the slag discharging shaft 4, specifically, is sleeved outside the front section of the slag discharging shaft 4, and a third cavity 31 is formed between the inner surface of the driving output connector 5 and the outer surface of the slag discharging shaft 4. The third chamber 31 is internally provided with the supporting ring 34, and the supporting ring 34 can specifically adopt a bearing with a rotary supporting function, so that the stability of the driving output connector 5 and the slag discharging shaft 4 during rotation is ensured.
The third chamber 31 is communicated with the second chamber 30, the outer drill rod 41 is arranged at the front end of the driving output connector 5, and the first channel 43 is communicated with the third chamber 31, so that the first channel 43, the third chamber 31, the second chamber 30 (medium channel) and the first chamber 29 form an outer channel of the drilling system together, and the medium is introduced through the outer channel and then discharged from the inner channel along with slag.
The inner surface of the slag discharging shaft 4 is provided with a spiral slag discharging blade 24, and the spiral slag discharging blade 24 is used for driving slag to move in the rotating process of the slag discharging shaft 4. In operation, a medium enters the drilling system through the medium inlet 28 on the medium guide cover 3, sequentially enters the drill hole through the first chamber 29, the second chamber 30, the third chamber 31 and the first channel 43, and then is discharged along with slag sequentially through the second channel 44, the slag discharge channel and the space in the slag discharge transition joint 6 to form internal circulation slag discharge. Compared with the existing structure, the slag discharging device has a larger slag discharging space, reduces the blocking risk, and is more reasonable in structural design, so that the technical problem that slag is easy to accumulate at the slag discharging structure at present is solved, and the blocking risk is further reduced.
The front outer wall of the slag discharging shaft 4 is provided with a slag discharging shaft transmission external spline 26 and an external sealing surface 25 which are matched with the internal drill rod 42. Wherein, the adaptation means that the spline structure arranged on the inner drill rod 42 is meshed with the slag discharging shaft transmission external spline 26, thereby realizing transmission torque; the sealing surface and the outer sealing surface 25 arranged on the inner drill rod 42 are smooth surfaces, and when the inner drill rod 42 is connected with the slag discharging shaft 4, the sealing surface and the outer sealing surface 25 arranged on the inner drill rod 42 are attached to each other, so that sealing is realized, and liquid leakage is avoided.
The inner wall of the tail end of the slag discharging shaft 4 is provided with a slag discharging shaft transmission inner spline 22 and an inner sealing surface 23 which are matched with the rear driving output shaft 17. Wherein, the adaptation means that a spline structure arranged on the rear driving output shaft 17 is meshed with a slag discharging shaft transmission internal spline 22, thereby realizing transmission torque; the sealing surface and the inner sealing surface 23 arranged on the rear driving output shaft 17 are smooth surfaces, and when the slag discharging shaft 4 is connected with the rear driving output shaft 17, the sealing surface arranged on the rear driving output shaft 17 is attached to the inner sealing surface 23, so that sealing is realized, and liquid leakage is avoided.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. A dual-channel internal deslagging reverse circulation drilling system, which is characterized by comprising: the device comprises a driving device, a medium guide cover and a slag discharge transition joint;
The driving device includes: a rear driving output shaft, a front driving output shaft and a slag discharging shaft;
The slag discharging shaft is arranged at the front end of the rear driving output shaft, the slag discharging shaft is communicated with the intra-shaft space of the rear driving output shaft to form a slag discharging channel for slag discharging, and the rear end of the rear driving output shaft is provided with a slag discharging transition joint communicated with the slag discharging channel;
the front driving output shaft is sleeved outside the slag discharging shaft, a medium channel for guiding in a medium is formed between the inner surface of the front driving output shaft and the outer surface of the slag discharging shaft, and the medium guiding cover is communicated with the medium channel.
2. The dual-channel internal deslagging reverse circulation drilling system of claim 1, wherein spiral deslagging blades are arranged on the inner surface of the deslagging shaft.
3. The dual channel internally deslagging reverse circulation drilling system of claim 2, wherein the driving device further comprises: a joint connecting seat; the slag discharging transition joint is an arc-shaped pipeline and is arranged on the joint connecting seat; the joint connecting seat is sleeved outside the rear end of the rear driving output shaft, and a sealing ring is arranged between the joint connecting seat and the rear driving output shaft.
4. A dual channel internally deslagging reverse circulation drilling system as claimed in claim 3, wherein the driving means further comprises: a rear driver, a rear driver driving gear and a rear driver driven gear which are meshed with each other; the rear driver driving gear is arranged on a power output shaft of the rear driver, and the rear driver driven gear is arranged on the outer wall of the rear driving output shaft.
5. The dual pass internally deslagging reverse circulation drilling system of claim 4, wherein the driving device further comprises: driving the output connector; the driving output connector is arranged at the front end of the front driving output shaft, and the driving output connector is sleeved outside the slag discharging shaft.
6. The dual pass internally deslagging reverse circulation drilling system of claim 5, wherein the driving device further comprises: a front driver, a front driver driving gear and a front driver driven gear which are meshed with each other; the front driver driving gear is arranged on a power output shaft of the front driver, and the front driver driven gear is arranged on the outer wall of the front driver output shaft.
7. The dual pass internally deslagging reverse circulation drilling system of claim 6, wherein the driving device further comprises: a front drive unit housing and a front drive unit rear end bearing cover;
the front driver is arranged on the front driving unit shell;
the medium guide cover is arranged on the bearing cover at the rear end of the front driving unit;
the medium guiding cover is sleeved outside the rear section of the slag discharging shaft; the front driving output shaft is sleeved outside the middle section of the slag discharging shaft; the driving output connection sleeve is sleeved outside the front section of the slag discharging shaft.
8. The dual pass internally deslagging reverse circulation drilling system of claim 7, further comprising: the driving device drives the rotating double-channel drill rod;
the dual-channel drill pipe comprises: an outer drill rod and an inner drill rod arranged inside the outer drill rod;
the inner drill rod is connected with the slag discharging shaft;
the outer drill rod is connected with the driving output connector.
9. The dual-channel internal deslagging reverse circulation drilling system of claim 8, wherein the outer wall of the front end of the deslagging shaft is provided with a deslagging shaft transmission external spline and an external sealing surface which are matched with the internal drill rod, and the inner wall of the rear end of the deslagging shaft is provided with a deslagging shaft transmission internal spline and an internal sealing surface which are matched with the rear driving output shaft.
10. The dual pass internally deslagging reverse circulation drilling system of claim 9, further comprising: a bracket;
The driving device further includes: a rear drive unit housing and a rear drive unit rear end bearing cover;
The rear driver is arranged on the rear driving unit shell;
The joint connecting seat is arranged on the bearing cover at the rear end of the rear driving unit;
the front driving unit shell and the rear driving unit shell are both arranged on the bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420860169.3U CN221722748U (en) | 2024-04-24 | 2024-04-24 | Double-channel internal deslagging reverse circulation drilling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420860169.3U CN221722748U (en) | 2024-04-24 | 2024-04-24 | Double-channel internal deslagging reverse circulation drilling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221722748U true CN221722748U (en) | 2024-09-17 |
Family
ID=92694088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420860169.3U Active CN221722748U (en) | 2024-04-24 | 2024-04-24 | Double-channel internal deslagging reverse circulation drilling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221722748U (en) |
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2024
- 2024-04-24 CN CN202420860169.3U patent/CN221722748U/en active Active
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