CN114016897B - Reverse circulation impactor and system - Google Patents
Reverse circulation impactor and system Download PDFInfo
- Publication number
- CN114016897B CN114016897B CN202111546983.5A CN202111546983A CN114016897B CN 114016897 B CN114016897 B CN 114016897B CN 202111546983 A CN202111546983 A CN 202111546983A CN 114016897 B CN114016897 B CN 114016897B
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- coring
- impactor
- slag
- reverse circulation
- component
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- 239000002893 slag Substances 0.000 claims description 119
- 238000007599 discharging Methods 0.000 claims description 57
- 239000011435 rock Substances 0.000 claims description 43
- 238000005553 drilling Methods 0.000 abstract description 36
- 238000000034 method Methods 0.000 description 42
- 230000008569 process Effects 0.000 description 25
- 238000010276 construction Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 239000004566 building material Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007123 defense Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- -1 air pollution Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a reverse circulation impactor and a system, wherein the reverse circulation impactor comprises a drill rod component and a coring component; the drill rod component and the coring component are integrally formed, and the drill rod component is arranged above the coring component; the coring component includes a coring impactor; the bottom of the coring impactor barrel body is in a circular ring shape, and a plurality of reverse circulation sub-down-the-hole hammers are arranged on the circular ring at intervals; the drill rod assembly is configured to provide a high pressure air passageway to the coring impactor. The device and the system have simple structure, are safe, effective, reliable and simple and convenient to operate, can effectively improve the drilling efficiency of the large-caliber impactor and reduce the cost of drilling tool consumption.
Description
Technical Field
The invention relates to the technical field of drilling machinery, in particular to a reverse circulation impactor and a device.
Background
The down-the-hole drill is a construction engineering device for piling holes, is suitable for engineering blasting hole drilling operations of metallurgy, coal, building materials, stone materials, railways, hydropower construction, national defense construction, earth and stone, and the like, has the characteristics of high drilling efficiency, wide application range, and the like compared with a common rock drill, and is currently universal rock drilling equipment.
With the development of industries such as metallurgy, coal, building materials, railways, hydroelectric construction, national defense construction, earthwork and the like, the drilling construction has more demands for diameters of 600 mm-1200 mm and over 1200mm,
Currently, large-caliber impactors appear on the market, and the large-caliber impactors are used for drilling large-caliber holes, especially when hard rock drilling is encountered, the drilling efficiency is obviously reduced, and the cost consumed by a drilling tool is obviously increased, including the discharge of rock slag, air pollution, water and soil pollution and surrounding environment damage.
Therefore, it is a urgent problem for those skilled in the art to provide a drilling tool that can effectively improve the drilling efficiency of a large-caliber impactor and reduce the cost consumed by the drilling tool.
Disclosure of Invention
The invention aims to provide a reverse circulation impactor and a system, which have the advantages of simple structure, safety, effectiveness, reliability and simple operation, can effectively improve the drilling efficiency of a large-caliber impactor, and reduce the cost of drilling tool consumption.
Based on the above purpose, the technical scheme provided by the invention is as follows:
a reverse circulation impactor comprising a drill rod component and a coring component;
The drill rod component and the coring component are integrally formed, and the drill rod component is arranged above the coring component;
The coring component includes a coring impactor;
the bottom of the coring impactor barrel body is in a circular ring shape, and a plurality of reverse circulation sub-down-the-hole hammers are arranged on the circular ring at intervals;
The drill rod assembly is configured to provide a high pressure air passageway to the coring impactor.
Preferably, the method comprises the steps of,
The coring impactor comprises a collecting pipe, a slag reflecting hole and a joint slag discharging pipe;
the acquisition tube is vertically arranged in the coring impactor;
the joint slag discharging pipe is L-shaped, and is transversely connected with one end of the collecting pipe;
the other end of the collecting pipe, which is close to the reverse circulation sub-down-the-hole hammer, is obliquely communicated with the slag reversing hole.
Preferably, the method comprises the steps of,
The coring impactor further comprises a joint positioning sleeve and a joint positioning sleeve vent hole;
The joint positioning sleeve is arranged above the collecting pipe and is abutted with the joint slag discharging pipe;
the joint locating sleeve vent hole is transversely arranged at the transverse joint slag discharging pipe and the collecting pipe clamp angle, and the joint locating sleeve vent hole is connected with the joint locating sleeve.
Preferably, the method comprises the steps of,
The coring component further comprises a slag collection chamber;
The slag collecting chamber is connected with the longitudinal joint slag discharging pipe and is used for collecting rock slag.
Preferably, the method comprises the steps of,
The coring component further includes a gas chamber;
the air chamber is arranged below the slag collecting chamber, is connected with the coring impactor and is used for conveying high-pressure air to the coring impactor.
Preferably, the method comprises the steps of,
The drill rod assembly includes a high pressure gas passage;
the high-pressure gas channel penetrates through the slag collecting chamber and is connected with the gas chamber.
Preferably, the method comprises the steps of,
The drill rod part further comprises a slag discharging channel;
the slag discharging channel is communicated with the slag collecting chamber.
Preferably, the method comprises the steps of,
The slag discharging channel, the slag collecting chamber and the coring impactor are respectively provided with two slag discharging channels;
The two slag discharging channels, the two slag collecting chambers and the two coring impactors are symmetrically arranged on two sides of the high-pressure gas channel.
A reverse circulation impact system comprising any one of the reverse circulation impactors described above;
the device also comprises a driving force head, an air compressor and a slag collecting device;
the driving force head cover is arranged at the top of the reverse circulation impactor;
The air compressor is connected with the high-pressure air channel through the driving force head;
the slag collecting device is connected with the slag discharging channel through the driving force head.
The reverse circulation impactor provided by the invention comprises two parts, wherein the upper part is a drill rod part, the lower part is a coring part, and the upper part and the coring part are integrally formed. The coring component is provided with a coring impactor, a barrel of the coring impactor is arranged in a circular ring shape, a plurality of reverse circulation sub-down-the-hole hammers are arranged on the circular ring at intervals, and the drill rod component is used for providing a high-pressure air channel for the coring impactor. In the working process, high-pressure air is injected into the drill rod component, the high-pressure air is injected into the coring impactor along a channel in the drill rod component, the bottom of the barrel of the coring impactor is in contact with rock, under the drive of the high-pressure air, a plurality of reverse circulation sub-down-the-hole hammers arranged at the annular position of the bottom perform rock drilling, when rock is drilled downwards, the down-hole hammers at the annular position are used for drilling rock, a rock core in the middle also enters the barrel of the coring impactor along with the rock core, after the rock core is filled with the barrel of the coring impactor, the angle of the coring impactor is adjusted, and the sub-down-hole hammers continue drilling until the rock core is broken through the high-pressure air. According to the invention, the cutting area of the rock is reduced, the drilling efficiency is obviously improved due to the fact that the drilling area is smaller, the traditional rock drilling mode is avoided, and compared with the traditional mode, the number of the sub-down-the-hole hammers is much smaller, and the cost consumed by the drilling tool can be effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the application 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 application, 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 view of a reverse circulation impactor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a structure of an M-direction coring impactor according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a specific structure of a coring impactor provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic structural view of a coring impactor according to an embodiment of the present invention
Fig. 5 is a schematic structural diagram of a reverse circulation impact system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention is written in a progressive manner.
The embodiment of the invention provides a reverse circulation impactor. The technical problems of reduction in drilling efficiency and increase in cost in the prior art are mainly solved.
A reverse circulation impactor comprises a drill rod component 1 and a coring component 2;
the drill rod part 1 and the coring part 2 are integrally formed, and the drill rod part 1 is arranged above the coring part 2;
the coring member 2 includes a coring impactor 21;
the bottom of the barrel of the coring impactor 21 is in a circular ring shape, and a plurality of reverse circulation sub-down-the-hole hammers 211 are arranged on the circular ring at intervals;
The drill rod assembly 1 is used to provide a high pressure air passage to the coring impactor 21.
The reverse circulation impactor provided by the invention comprises two parts, wherein the upper part is a drill rod part, the lower part is a coring part, and the upper part and the coring part are integrally formed. The coring component is provided with a coring impactor, a barrel of the coring impactor is arranged in a circular ring shape, a plurality of reverse circulation sub-down-the-hole hammers are arranged on the circular ring at intervals, and the drill rod component is used for providing a high-pressure air channel for the coring impactor. In the working process, high-pressure air is injected into the drill rod component, the high-pressure air is injected into the coring impactor along a channel in the drill rod component, the bottom of the barrel of the coring impactor is in contact with rock, under the drive of the high-pressure air, a plurality of reverse circulation sub-down-the-hole hammers arranged at the annular position of the bottom perform rock drilling, when rock is drilled downwards, the down-hole hammers at the annular position are used for drilling rock, a rock core in the middle also enters the barrel of the coring impactor along with the rock core, after the rock core is filled with the barrel of the coring impactor, the angle of the coring impactor is adjusted, and the sub-down-hole hammers continue drilling until the rock core is broken through the high-pressure air. According to the invention, the cutting area of the rock is reduced, the drilling efficiency is obviously improved due to the fact that the drilling area is smaller, the traditional rock drilling mode is avoided, and compared with the traditional mode, the number of the sub-down-the-hole hammers is much smaller, and the cost consumed by the drilling tool can be effectively reduced.
Preferably, the method comprises the steps of,
The coring impactor 21 comprises a sampling tube 212, a slag reflecting hole 213 and a joint slag discharging tube 214;
the collection tube 212 is vertically disposed within the interior of the coring impactor 21;
the joint slag discharging pipe 214 is L-shaped, and the transverse joint slag discharging pipe 214 is connected with one end of the collecting pipe 212;
the other end of the collecting pipe 212, which is close to the reverse circulation sub-down-the-hole hammer 211, is obliquely communicated with the slag-reflecting hole 213.
In the practical application process, the coring impactor is also provided with a collecting pipe, a slag reflecting hole and a joint slag discharging pipe. Wherein, the collection pipe is vertically arranged in the coring impactor, the joint slag discharging pipe is L-shaped, the transverse joint slag discharging pipe is connected with one end of the collection pipe, and the other end of the collection pipe is obliquely communicated with the slag reflecting hole. In the working process, under the action of high-pressure gas, the coring impactor forms a closed space in the process of contacting with rock, after the coring impactor rises, the gas forms a pressure difference, rock slag generated in the process of driving rock drilling obliquely enters the collecting pipe through the slag reversing hole, and under the action of the air pressure difference, the rock slag rises through the collecting pipe and is discharged through the connector slag discharging pipe, so that the pollution of the rock slag to air, water, soil and surrounding environment is reduced.
Preferably, the method comprises the steps of,
The coring impactor 21 further includes a joint positioning sleeve 215 and a joint positioning sleeve vent hole 216;
the joint positioning sleeve 215 is arranged above the collecting pipe 212 and is abutted with the joint slag discharging pipe 214;
the joint positioning sleeve vent hole 216 is transversely arranged at an included angle between the joint slag discharging pipe 214 and the collecting pipe 212, and the joint positioning sleeve vent hole 216 is connected with the joint positioning sleeve 215.
In the practical application process, the coring impactor is also provided with a joint positioning sleeve and a joint positioning sleeve vent hole, and the joint positioning sleeve is arranged above the collecting pipe and is in butt joint with the joint slag discharging pipe. The joint locating sleeve vent hole is transversely arranged at the corners of the transverse joint slag discharging pipe and the collecting pipe clamp. In the working process, as the coring impactor continuously drills the rock under high-pressure gas, the joint slag discharging pipe connected with the collecting pipe continuously vibrates in the rock drilling process, so that the rock slag is discharged inefficiently. Therefore, the connector positioning sleeve is arranged, the connector positioning sleeve is a conical surface and plays a role in positioning and sealing, and the connector positioning sleeve is matched with the connector slag discharging pipe to provide a stable slag discharging channel for the coring impactor. Meanwhile, the connector positioning sleeve vent hole is also arranged for enabling the coring impactor to receive the transmitted high-pressure gas, so that the coring impactor works normally.
Preferably, the method comprises the steps of,
The coring component 2 further includes a slag collection chamber 22;
the slag collecting chamber 22 is connected with a longitudinal joint slag discharging pipe 214 for collecting rock slag.
In the practical application process, the coring component is also provided with a slag collecting chamber which is connected with a slag discharging pipe. In the working process, the rock slag enters the slag discharging pipe from the slag discharging hole to move upwards under the drive of the air pressure difference, and finally enters the slag collecting chamber.
Preferably, the method comprises the steps of,
The coring component 2 further includes a gas chamber 23;
an air chamber 23 is provided below the slag collection chamber 22, and the air chamber 23 is connected to the coring impactor 21 for delivering high pressure air to the coring impactor 21.
In the practical application process, the coring component is also provided with an air chamber, the air chamber is arranged below the slag collecting chamber, and the air chamber is connected with the coring impactor to convey high-pressure air to the coring impactor. In the working process, high-pressure air enters the air chamber through the drill rod part and is injected into the coring impactor through the air chamber to drive the coring impactor to work.
Preferably, the method comprises the steps of,
The drill rod assembly 1 comprises a high pressure gas channel 11;
The high-pressure gas channel 11 passes through the slag collecting chamber 22 and is connected with the gas chamber 23.
In the actual application process, the drill rod component is provided with a high-pressure gas channel, and the high-pressure gas channel penetrates through the slag collecting chamber to be connected with the air chamber. In the working process, high-pressure gas is injected into the coring impactor through a high-pressure gas channel in the drill rod component and a gas chamber in the coring component by using equipment such as a pneumatic press and the like to drive the sub-down-the-hole hammer to drill rock.
Preferably, the method comprises the steps of,
The drill rod part 1 further comprises a slag discharge channel 12;
The slag discharging channel 12 is communicated with the slag collecting chamber 22.
In the actual application process, the drill rod part is also provided with a slag discharging channel which is communicated with the slag collecting chamber. In the working process, the slag collecting device is connected with the slag discharging channel through equipment such as the slag collecting device, and the rock slag of the slag discharging chamber is discharged to the slag collecting device through the slag discharging channel, so that the collection and cleaning of the rock slag are completed, and the pollution to the environment in the rock drilling process is reduced.
Preferably, the method comprises the steps of,
The slag discharging channel 12, the slag collecting chamber 22 and the coring impactor 21 are respectively provided with two slag discharging channels;
The two slag discharging channels 12, the two slag collecting chambers 22 and the two coring impactors 21 are symmetrically arranged at two sides of the high-pressure gas channel 11.
In the practical application process, the slag discharging channel, the slag collecting chamber and the coring impactor are respectively provided with two slag discharging channels, the slag collecting chamber and the coring impactor are respectively and symmetrically arranged at two sides of the high-pressure gas channel. In the working process, based on the consideration of further improving the efficiency, two slag discharging channels, two slag collecting chambers and two coring impactors can be arranged at the same time, high-pressure gas is injected into the high-pressure gas channels to enable the two coring impactors to work at the same time, and the rock drilling coring efficiency is greatly improved.
A reverse circulation impact system comprising a reverse circulation impactor 1 of any one of the above;
the device also comprises a driving force head 2, an air compressor 3 and a slag collecting device 4;
The driving force head 2 is covered on the top of the reverse circulation impactor 1;
The air compressor 3 is connected with the high-pressure gas channel 11 through the driving force head 2;
the slag collecting device 3 is connected with the slag discharging channel 12 through the driving force head 2.
In the practical application process, the reverse circulation impact device is provided with a reverse circulation impact device, a driving force head, an air compressor and a slag collecting device, wherein the driving force head is arranged at the top of the reverse circulation impact device, and the air compressor and the slag collecting device are respectively connected with a high-pressure gas channel and a slag discharging channel through the driving force head. In the working process, the air compressor is started to generate high-pressure gas, the high-pressure gas finally enters the coring impactor through the driving force head, the high-pressure gas pipeline and the air chamber, the coring impactor performs rock drilling under the action of the high-pressure gas, and generated rock slag finally enters the slag collecting device through the slag discharging hole, the slag discharging pipeline, the slag discharging chamber and the slag discharging channel under the action of air pressure difference.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The reverse circulation impact device and the system provided by the invention are described in detail. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A reverse circulation impactor is characterized by comprising a drill rod component and a coring component;
The drill rod component and the coring component are integrally formed, and the drill rod component is arranged above the coring component;
The coring component includes a coring impactor;
the bottom of the coring impactor barrel body is in a circular ring shape, and a plurality of reverse circulation sub-down-the-hole hammers are arranged on the circular ring at intervals;
the drill rod assembly is configured to provide a high pressure air passage to the coring impactor;
The coring impactor comprises a collecting pipe, a slag reflecting hole and a joint slag discharging pipe;
the acquisition tube is vertically arranged in the coring impactor;
the joint slag discharging pipe is L-shaped, and is transversely connected with one end of the collecting pipe;
The other end of the collecting pipe, which is close to the reverse circulation sub-down-the-hole hammer, is obliquely communicated with the slag reversing hole;
The coring impactor further comprises a joint positioning sleeve and a joint positioning sleeve vent hole;
The joint positioning sleeve is arranged above the collecting pipe and is abutted with the joint slag discharging pipe;
The joint positioning sleeve vent hole is transversely arranged at the angle of the transverse joint slag discharging pipe and the collecting pipe clamp, and is connected with the joint positioning sleeve;
The coring component further comprises a slag collection chamber;
The slag collecting chamber is connected with the longitudinal joint slag discharging pipe and is used for collecting rock slag;
the coring component further includes a gas chamber;
the air chamber is arranged below the slag collecting chamber, is connected with the coring impactor and is used for conveying high-pressure air to the coring impactor.
2. The reverse circulation impactor of claim 1, wherein,
The drill rod assembly includes a high pressure gas passage;
the high-pressure gas channel penetrates through the slag collecting chamber and is connected with the gas chamber.
3. The reverse circulation impactor of claim 2, wherein,
The drill rod part further comprises a slag discharging channel;
the slag discharging channel is communicated with the slag collecting chamber.
4. The reverse circulation impactor of claim 3, wherein,
The slag discharging channel, the slag collecting chamber and the coring impactor are respectively provided with two slag discharging channels;
The two slag discharging channels, the two slag collecting chambers and the two coring impactors are symmetrically arranged on two sides of the high-pressure gas channel.
5. A reverse circulation impact system comprising a reverse circulation impactor of any one of claims 3 to 4;
the device also comprises a driving force head, an air compressor and a slag collecting device;
the driving force head cover is arranged at the top of the reverse circulation impactor;
The air compressor is connected with the high-pressure air channel through the driving force head;
the slag collecting device is connected with the slag discharging channel through the driving force head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546983.5A CN114016897B (en) | 2021-12-16 | 2021-12-16 | Reverse circulation impactor and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546983.5A CN114016897B (en) | 2021-12-16 | 2021-12-16 | Reverse circulation impactor and system |
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| Publication Number | Publication Date |
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| CN114016897A CN114016897A (en) | 2022-02-08 |
| CN114016897B true CN114016897B (en) | 2024-05-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111395951A (en) * | 2020-05-08 | 2020-07-10 | 长沙黑金刚实业有限公司 | Heavy-calibre reverse circulation impact system |
| CN112696149A (en) * | 2021-02-09 | 2021-04-23 | 徐州海润行知重工机械有限公司 | Down-the-hole coring hammer head and annular down-the-hole hammer |
| CN113356753A (en) * | 2021-07-13 | 2021-09-07 | 新泰玖翊工程机械有限公司 | Combined variable-caliber cluster type down-the-hole hammer |
| CN114016896A (en) * | 2021-12-16 | 2022-02-08 | 长沙黑金刚实业有限公司 | Reverse circulation impactor and system |
| CN217106807U (en) * | 2021-12-16 | 2022-08-02 | 长沙黑金刚实业有限公司 | Reverse circulation impactor and system |
-
2021
- 2021-12-16 CN CN202111546983.5A patent/CN114016897B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111395951A (en) * | 2020-05-08 | 2020-07-10 | 长沙黑金刚实业有限公司 | Heavy-calibre reverse circulation impact system |
| CN112696149A (en) * | 2021-02-09 | 2021-04-23 | 徐州海润行知重工机械有限公司 | Down-the-hole coring hammer head and annular down-the-hole hammer |
| CN113356753A (en) * | 2021-07-13 | 2021-09-07 | 新泰玖翊工程机械有限公司 | Combined variable-caliber cluster type down-the-hole hammer |
| CN114016896A (en) * | 2021-12-16 | 2022-02-08 | 长沙黑金刚实业有限公司 | Reverse circulation impactor and system |
| CN217106807U (en) * | 2021-12-16 | 2022-08-02 | 长沙黑金刚实业有限公司 | Reverse circulation impactor and system |
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| Publication number | Publication date |
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| CN114016897A (en) | 2022-02-08 |
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