CN210370481U - Drilling, sand blasting and hole reaming device for dry hot rock pneumatic down-the-hole hammer - Google Patents
Drilling, sand blasting and hole reaming device for dry hot rock pneumatic down-the-hole hammer Download PDFInfo
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- CN210370481U CN210370481U CN201921260772.3U CN201921260772U CN210370481U CN 210370481 U CN210370481 U CN 210370481U CN 201921260772 U CN201921260772 U CN 201921260772U CN 210370481 U CN210370481 U CN 210370481U
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- 238000005553 drilling Methods 0.000 title claims abstract description 57
- 239000011435 rock Substances 0.000 title claims abstract description 53
- 238000005488 sandblasting Methods 0.000 title claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 71
- 238000003860 storage Methods 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 210000001503 joint Anatomy 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 18
- 239000003292 glue Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 239000003082 abrasive agent Substances 0.000 abstract description 4
- 241001074085 Scophthalmus aquosus Species 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- 239000010438 granite Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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Abstract
A drilling and sand blasting reaming device for a pneumatic hot rock down-the-hole hammer relates to the technical field of drilling tools for hot dry rock drilling and comprises an upper connector, a fixed sleeve, a sliding sleeve, a middle connector, a drainage tube, a Venturi nozzle, a sand guide tube, an outer tube, an inner tube, a sand storage cavity, a lower connector and a resin ball, wherein the sliding sleeve seals a side hole and the sand storage cavity during normal drilling, and compressed air enters the pneumatic down-the-hole hammer along a central air flow channel. Throw into the resin ball when carrying the brill, central air current passageway is closed, and pressure increases in the twinkling of an eye, and the sliding sleeve gliding, side opening and storage sand chamber are opened, lets in compressed air, and compressed air gets into the drainage tube and produces the negative pressure in the hybrid chamber, and the abrasive material in the storage sand chamber gets into the venturi spray tube directive wall of a well after mixing with compressed air along draw sand pipe and draw sand hole entering drainage tube hybrid chamber under the air pressure combined action on negative pressure and storage sand chamber upper portion, the utility model discloses can enlarge the well footpath effectively, provide the powerful guarantee for new drill bit reachs the hole bottom smoothly, reduced the drilling process under the repeated, improved the rate of creeping into.
Description
Technical Field
The utility model relates to a hot dry rock probing drilling tool technical field, in particular to hot dry rock pneumatic down-the-hole hammer drilling sandblast reaming device.
Background
The dry-hot rock is used as a renewable clean energy source with large reserve and wide distribution, and has extremely high development value and application prospect. Drilling is a key link for development of hot dry rocks. Drilling in a hot dry rock stratum has a plurality of difficulties, including high drilling environment temperature, which affects the stability of drilling fluid and the service life of drilling tools; the main lithology of the hot dry rock is various metamorphic rocks and crystalline rocks, the rock is compact and hard, the compressive strength is high, the drillability is poor, and the hot dry rock is common as granite, granite spangle rock and the like; and the drilling depth is large, and the drilling depth is influenced by adverse factors such as deep hole confining pressure, liquid column pressure holding effect and the like, so that the strength and hardness of the rock are obviously improved, and high requirements on drilling process, equipment maintenance and the like are also provided. By adopting the conventional rotary drilling method, the rock crushing efficiency is low, the drill bit is quickly abraded, and the drilling cost is high, so that the large-scale development and utilization of the hot dry rock are seriously restricted.
From the theory of rock fragmentation, the down-the-hole hammer drilling technology is one of the most effective methods for solving the hard rock drilling problem at present. The pneumatic down-the-hole hammer has the remarkable characteristics of high drilling efficiency, long service life of a drill bit, low drilling cost, low liquid column pressure holding effect and the like, and has a huge application prospect in hot dry rock drilling.
Because the conventional pneumatic down-the-hole hammer drilling does not have a hole reaming function, the abrasiveness of a hot dry rock stratum is strong, the outer diameter of a drill bit out of the well is seriously abraded, and in order to ensure that a new air drill bit can smoothly reach the bottom of a hole, a roller bit is usually used for reaming. The method increases the times of drilling down, and has low drilling speed and high drilling cost.
SUMMERY OF THE UTILITY MODEL
Need the reaming before the new drill bit to the pnematic down-the-hole hammer of hot dry rock creeps into down, and current lower roller bit reaming method exists the longer scheduling problem that takes time, the utility model aims to provide a novel reliable pnematic down-the-hole hammer of hot dry rock that is used for improving hot dry rock drilling speed creeps into sandblast reaming device.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: the pneumatic down-the-hole hammer of hot dry rock creeps into sandblast reaming device, its characterized in that includes: the device comprises an upper joint, a fixed sleeve, a sliding sleeve, a middle joint, a drainage tube, a Venturi nozzle, a sand guide tube, an outer tube, an inner tube, a sand storage cavity, a lower joint and a resin ball, wherein the upper joint is connected to the upper end of the middle joint through threads; the middle joint is provided with side holes which are uniformly distributed along the circumference of the middle joint, and the side holes are arranged in an upward inclined manner; the sliding sleeve is connected with the fixed sleeve through a shear pin, the sliding sleeve, the middle joint and the inner tube are coaxially arranged, the upper part of the sliding sleeve is positioned in a central channel of the middle joint, and the lower part of the sliding sleeve is positioned in the inner tube; the fixed sleeve is positioned at the upper part of the central channel of the middle joint, and the top end of the fixed sleeve is propped against the bottom end face of the upper joint; the Venturi nozzle and the drainage tube are fixed in the side hole, the Venturi nozzle, the drainage tube and the side hole are coaxial, and the Venturi nozzle is communicated with the drainage tube; a sand inlet corresponding to the sand guiding hole is formed in the drainage pipe; the sand guiding hole is formed in the bottom of the middle joint; the outer pipe is positioned between the middle joint and the lower joint, the upper end of the outer pipe is in threaded connection with the middle joint, and the lower end of the outer pipe is in threaded connection with the lower joint; the inner pipe is positioned in the outer pipe, the inner pipe and the outer pipe are coaxially arranged, the length of the inner pipe is smaller than that of the outer pipe, the upper end of the inner pipe is a free end, and the lower end of the inner pipe is connected to the upper end of the lower connector through threads; the sand storage cavity is an annular cavity formed between the inner pipe and the outer pipe; the sand guiding pipe is arranged in the sand storage cavity, the bottom end of the sand guiding pipe is a sand inlet end, and the top end of the sand guiding pipe is inserted into the sand guiding hole and is in threaded connection with the sand guiding hole; the resin ball is used for controlling the sliding sleeve to close or open the side hole and the upper opening of the sand storage cavity.
Furthermore, the included angle between the central axis of the side hole and the central axis of the middle joint is 45-75 degrees.
Furthermore, a first sealing ring is arranged between the sliding sleeve and the middle joint, and a second sealing ring is arranged between the sliding sleeve and the inner pipe.
Further, the outer diameter of the sliding sleeve is d, the inner diameter of the sliding sleeve is 0.8d, and the diameter of the resin ball is 0.9 d.
Furthermore, the inner pipe is divided into an upper section and a lower section, the inner diameter of the upper section is d, the length of the upper section is the same as the length of the sliding sleeve, and the inner diameter of the lower section is 0.75-0.8 d.
Further, the drainage tube is fixed in the side hole through a flat key.
Further, two sealing rings, namely a third sealing ring and a fourth sealing ring, are arranged between the drainage tube and the side hole.
Furthermore, the venturi nozzle is connected in the nozzle base through strong glue, and there are two screwing holes at the nozzle base top, nozzle base and side opening threaded connection.
Furthermore, an elastic retainer ring is arranged above the nozzle seat.
Through the above design scheme, the utility model discloses following beneficial effect can be brought:
1. the utility model provides a pnematic down-the-hole hammer of hot dry rock creeps into sandblast reaming device can enlarge the well diameter effectively, for the new drill bit arrives the hole bottom smoothly and provides powerful guarantee, has reduced and has bored the number of times under the condition, has improved drilling speed.
2. The utility model provides a pnematic down-the-hole hammer of hot dry rock creeps into the sandblast reaming device and has avoided the hard contact of drilling tool with the wall of a well, has reduced the wearing and tearing of drilling tool, reduces the probability of downthehole occurence of failure effectively.
3. The utility model provides a pnematic down-the-hole hammer of dry and hot rock creeps into sandblast reaming device, when normally drilling, stores up the interior abrasive material that does not have of sand chamber, and central air flow channel is closed when carrying the drilling to carry out sandblast reaming, can not appear the abrasive material and get into the condition that pnematic down-the-hole hammer destroyed the inside precision component of down-the-hole hammer.
4. The utility model provides a pnematic down-the-hole hammer of hot dry rock creeps into sandblast reaming device convenient to use. After each drilling is finished, the upper joint is unscrewed before next use, the fixed sleeve and the sliding sleeve are taken out, new shear nails are loaded after cleaning, then the fixed sleeve and the sliding sleeve are placed in the original position, and the upper joint is screwed up for reuse.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this application, and the exemplary embodiments and descriptions thereof are used to understand the invention without constituting undue limitations of the invention, in which:
fig. 1 is a schematic structural diagram of a hot dry rock pneumatic down-the-hole hammer drilling sand blasting reaming device provided by the utility model during normal drilling.
Fig. 2 is a schematic structural diagram of the hot dry rock pneumatic down-the-hole hammer drilling sand blasting reaming device provided by the utility model after ball throwing.
The respective symbols in the figure are as follows: 1-upper joint, 2-middle joint, 3-elastic retainer ring, 4-screwing and disassembling hole, 5-Venturi nozzle, 6-nozzle seat, 7-Luodi gasket, 8-nut, 9-sliding sleeve, 10-second sealing ring, 11-sand guide pipe, 12-inner pipe, 13-outer pipe, 14-lower joint, 15-fixing sleeve, 16-shear nail, 17-first sealing ring, 18-drainage pipe, 19-side hole, 20-flat key, 21-third sealing ring, 22-sand guide hole, 23-fourth sealing ring, 24-sand storage cavity and 25-resin ball.
Detailed Description
In order to explain the present invention more clearly, the present invention will be further described with reference to the preferred embodiments and the accompanying drawings. As will be appreciated by those skilled in the art. The following detailed description is intended to be illustrative rather than limiting, and is not intended to limit the scope of the invention.
As shown in fig. 1 and 2, the drilling, sand blasting and reaming device for the hot dry rock pneumatic down-the-hole hammer comprises an upper connector 1, a fixed sleeve 15, a sliding sleeve 9, a middle connector 2, a drainage tube 18, a venturi nozzle 5, a sand guide tube 11, an outer tube 13, an inner tube 12, a sand storage cavity 24, a lower connector 14 and a resin ball 25, wherein the upper connector 1 is connected to the upper end of the middle connector 2 through threads; the middle joint 2 is provided with side holes 19, the side holes 19 are uniformly distributed along the circumference of the middle joint 2, the side holes 19 are arranged in an upward inclined manner, and the included angle between the central axis of the side holes 19 and the central axis of the middle joint 2 is 45-75 degrees; the sliding sleeve 9 is connected with the fixed sleeve 15 through a shear pin 16, the sliding sleeve 9, the middle joint 2 and the inner pipe 12 are coaxially arranged, the upper part of the sliding sleeve 9 is positioned in a central channel of the middle joint 2, the lower part of the sliding sleeve 9 is positioned in the inner pipe 12, the sliding sleeve 9 and the middle joint 2 are sealed by a first sealing ring 17, the sliding sleeve 9 and the inner pipe 12 are sealed by a second sealing ring 10, and the sliding sleeve 9 and the fixed sleeve 15 are connected through the shear pin 16; the fixed sleeve 15 is positioned at the upper part of the central channel of the middle joint 2, and the top end of the fixed sleeve 15 abuts against the bottom end face of the upper joint 1 and is pressed by the upper joint 1; the Venturi nozzle 5 and the drainage tube 18 are fixed in the side hole 19, the Venturi nozzle 5, the drainage tube 18 and the side hole 19 are coaxial, and the Venturi nozzle 5 is communicated with the drainage tube 18; a sand inlet corresponding to the sand guiding hole 22 is formed on the drainage tube 18; the sand guiding hole 22 is formed at the bottom of the middle joint 2; the outer pipe 13 is positioned between the middle joint 2 and the lower joint 14, the upper end of the outer pipe 13 is in threaded connection with the middle joint 2, and the lower end of the outer pipe 13 is in threaded connection with the lower joint 14; the inner pipe 12 is arranged inside the outer pipe 13, the inner pipe 12 is coaxial with the outer pipe 13, the length of the inner pipe 12 is smaller than that of the outer pipe 13, the upper end of the inner pipe 12 is a free end, and the lower end of the inner pipe 12 is connected to the upper end of the lower joint 14 through threads; the sand storage cavity 24 is an annular cavity formed between the inner pipe 12 and the outer pipe 13; the sand guiding pipe 11 is arranged in the sand storage cavity 24, and the top end of the sand guiding pipe 11 is inserted into the sand guiding hole 22 and is in threaded connection with the sand guiding hole; the resin ball 25 is used for controlling the sliding sleeve 9 to shield or open the side hole 19 and the upper opening of the sand storage cavity 24.
The utility model provides an upper joint 1 of a hot dry rock pneumatic down-the-hole hammer drilling sand blasting reaming device which is in threaded connection with a drill rod, and a lower joint 14 is in threaded connection with an upper joint of the pneumatic down-the-hole hammer;
the utility model provides a hot dry rock pnematic down-the-hole hammer creeps into sandblast reaming device's theory of operation: a great number of microcracks exist in the granite rock body after the granite rock body is drilled by using a down-the-hole hammer drilling technology within a range of 0-10 mm from the hole wall, and the granite hardness around the well wall is reduced due to the existence of the microcracks (the granite rock body can be scribed by a knife). When the drill is lifted, the compressed air carrying the abrasive is sprayed to the well wall through the Venturi nozzle 5 at a low speed, so that the rock mass with a large number of cracks can be peeled off. This method is similar to the sand blasting and rust removal in metal surface treatment processes and is therefore named sand blasting reaming. The sand blasting reaming mode not only reduces the repeated drilling times under the condition of lifting the drill, greatly improves the drilling speed, but also avoids the hard contact between the drilling tool and the hole wall and reduces the abrasion of the drilling tool.
When drilling normally, the sliding sleeve 9 is connected to the fixed sleeve 15 through the shear pin 16; the sliding sleeve 9 seals the side hole 19 and the sand storage cavity 24, and compressed air enters the pneumatic down-the-hole hammer along the central air flow channel. When the drill is lifted, the resin ball 25 is put in, the central air flow channel is closed, the pressure is increased instantly, the shear pin 16 is cut off, the sliding sleeve 9 slides downwards, and the side hole 19 and the sand storage cavity 24 are opened.
The central axis of the Venturi nozzle 5 and the central axis of the middle joint 2 are 45-75 degrees, so that rock debris and abrasive materials generated while the rock on a well wall is efficiently stripped can be discharged at a certain upward return speed.
The speed of lifting the drill bit and the rotation speed of the drill string during lifting the drill bit depend on the stripping speed of the rock on the well wall so as to ensure that the rock on the well wall is stripped to the required thickness.
The number of the Venturi nozzles 5 can be increased or reduced according to the working pressure and the working efficiency of the Venturi nozzles 5, and the Venturi nozzles 5 are uniformly distributed along the circumference of the middle joint 2 so as to ensure that the acting force of the jet air flow and the abrasive on the drilling tool is mutually offset.
The central air flow channel consists of central channels of an upper joint 1, a middle joint 2, a sliding sleeve 9, an inner pipe 12 and a lower joint 14;
the pitching starting system comprises: the sand-throwing device comprises a sliding sleeve 9, a fixed sleeve 15, shear pins 16, an inner tube 12 and a resin ball 25, wherein the diameter of the resin ball 25 is 0.9d (the outer diameter of the sliding sleeve 9 is d, and the inner diameter of the sliding sleeve 9 is 0.8d), the sliding sleeve 9 can be effectively sealed after the resin ball 25 enters the sliding sleeve 9, the inner tube 12 is divided into an upper section and a lower section, the inner diameter of the upper section is d, the length of the upper section is the same as the length of the sliding sleeve 9, the inner diameter of the lower section is 0.75 d-0.8 d.
Sand blasting reaming system: the drainage tube 18 is plugged into the side hole 19 and sealed by a third sealing ring 21 and a fourth sealing ring 23, a sand inlet on the drainage tube 18 is aligned with a sand guiding hole 22, and the drainage tube 18 is fixed in the side hole 19 by a flat key 20; the Venturi nozzle 5 is connected in the nozzle base 6 through strong glue; the top of the nozzle seat 6 is provided with two screwing and disassembling holes 4, the outside of the nozzle seat 6 is provided with threads, and the nozzle seat 6 is screwed into the side hole 19; an elastic retainer ring 3 is arranged above the nozzle seat 6 to prevent the falling off; the upper part of the sand guiding pipe 11 is provided with an external thread, a nut 8 is screwed on the sand guiding pipe 11, then the Luodi gasket 7 is placed, the sand guiding pipe 11 is screwed into the sand guiding hole 22, and then the nut 8 is screwed; the outer pipe 13 is connected to the middle joint 2 and the lower joint 14 through threads, the inner pipe 12 is connected to the lower joint 14 through threads, and the annular cavity between the inner pipe 12 and the outer pipe 13 is a sand storage cavity 24.
During normal drilling: the sliding sleeve 9 seals the upper parts of the side hole 19 and the sand storage cavity 24, and compressed gas enters the pneumatic down-the-hole hammer below through the central gas flow channel to play the roles of driving the pneumatic down-the-hole hammer to work, cleaning rock debris and cooling the drill bit.
When the hole is expanded by sand blasting, ① stops drilling, resin balls 25 are put in, a central air flow channel is closed, a shear pin 16 is sheared by a sliding sleeve 9 under the pressure of compressed air and slides into an inner pipe 12, a side hole 19 and the upper part of a sand storage cavity 24 are opened, ② sand is put in, abrasive falls on the sliding sleeve 9 and the resin balls 25 and then slides into the sand storage cavity 24, ③ the amount of the added abrasive is enough to fill the sand storage cavity 24, the drill is lifted, the compressed air is introduced, the compressed air enters a drainage pipe 18 to generate negative pressure in a mixing cavity, the abrasive in the sand storage cavity 24 enters the mixing cavity of the drainage pipe 18 along a sand guide pipe 11 and a sand guide hole 22 under the combined action of the negative pressure and the air pressure at the upper part of the sand storage cavity 24, the compressed air is mixed with the compressed air and then enters a Venturi nozzle 5 and is sprayed out to the well wall through the Venturi nozzle 5, the time required for complete abrasive consumption in the sand storage cavity 24 is determined according to the consumption rate of the abrasive, the abrasive is stopped, and the drill is lifted out of the steps ② and ③ are.
The above, only be the preferred embodiment of the present invention, not used to limit the present invention, the protection scope of the present invention is defined by the claims, all the equivalent structural changes made by the contents of the specification and the drawings should be included in the protection scope of the present invention.
Claims (9)
1. The pneumatic down-the-hole hammer of hot dry rock creeps into sandblast reaming device, its characterized in that includes: the device comprises an upper joint, a fixed sleeve, a sliding sleeve, a middle joint, a drainage tube, a Venturi nozzle, a sand guide tube, an outer tube, an inner tube, a sand storage cavity, a lower joint and a resin ball, wherein the upper joint is connected to the upper end of the middle joint through threads; the middle joint is provided with side holes which are uniformly distributed along the circumference of the middle joint, and the side holes are arranged in an upward inclined manner; the sliding sleeve is connected with the fixed sleeve through a shear pin, the sliding sleeve, the middle joint and the inner tube are coaxially arranged, the upper part of the sliding sleeve is positioned in a central channel of the middle joint, and the lower part of the sliding sleeve is positioned in the inner tube; the fixed sleeve is positioned at the upper part of the central channel of the middle joint, and the top end of the fixed sleeve is propped against the bottom end face of the upper joint; the Venturi nozzle and the drainage tube are fixed in the side hole, the Venturi nozzle, the drainage tube and the side hole are coaxial, and the Venturi nozzle is communicated with the drainage tube; a sand inlet corresponding to the sand guiding hole is formed in the drainage pipe; the sand guiding hole is formed in the bottom of the middle joint; the outer pipe is positioned between the middle joint and the lower joint, the upper end of the outer pipe is in threaded connection with the middle joint, and the lower end of the outer pipe is in threaded connection with the lower joint; the inner pipe is positioned in the outer pipe, the inner pipe and the outer pipe are coaxially arranged, the length of the inner pipe is smaller than that of the outer pipe, the upper end of the inner pipe is a free end, and the lower end of the inner pipe is connected to the upper end of the lower connector through threads; the sand storage cavity is an annular cavity formed between the inner pipe and the outer pipe; the sand guiding pipe is arranged in the sand storage cavity, the bottom end of the sand guiding pipe is a sand inlet end, and the top end of the sand guiding pipe is inserted into the sand guiding hole and is in threaded connection with the sand guiding hole; the resin ball is used for controlling the sliding sleeve to close or open the side hole and the upper opening of the sand storage cavity.
2. The hot dry rock pneumatic down-the-hole hammer drilling, sand blasting and reaming device of claim 1, wherein an included angle between a central axis of the side hole and a central axis of the middle joint is 45-75 °.
3. The hot dry rock pneumatic down-the-hole hammer drilling, sand blasting and reaming device as claimed in claim 1, wherein a first sealing ring is arranged between the sliding sleeve and the middle joint, and a second sealing ring is arranged between the sliding sleeve and the inner pipe.
4. The hot dry rock pneumatic down-the-hole hammer drilling, sand blasting and reaming device of claim 1, wherein the sliding sleeve has an outer diameter of d, an inner diameter of 0.8d and a diameter of 0.9d of a resin ball.
5. The hot dry rock pneumatic down-the-hole hammer drilling, sand blasting and reaming device of claim 1, wherein the inner pipe is divided into an upper section and a lower section, the inner diameter of the upper section is d, the length of the upper section is the same as that of the sliding sleeve, and the inner diameter of the lower section is 0.75 d-0.8 d.
6. The hot dry rock pneumatic down-the-hole hammer drilling, sand blasting and reaming device of claim 1, wherein the drainage tube is fixed in the side hole by a flat key.
7. The hot dry rock pneumatic down-the-hole hammer drilling, sand blasting and reaming device as claimed in claim 1 or 6, wherein two sealing rings, namely a third sealing ring and a fourth sealing ring, are arranged between the drainage tube and the side hole.
8. The hot dry rock pneumatic down-the-hole hammer drilling, sand blasting and reaming device of claim 1, wherein the venturi nozzle is bonded in the nozzle holder by strong glue, the nozzle holder has two screwing holes at the top, and the nozzle holder is in threaded connection with the side hole.
9. The hot dry rock pneumatic down-the-hole hammer drilling, sand blasting and reaming device of claim 8, wherein a resilient collar is disposed above the nozzle seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921260772.3U CN210370481U (en) | 2019-08-06 | 2019-08-06 | Drilling, sand blasting and hole reaming device for dry hot rock pneumatic down-the-hole hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921260772.3U CN210370481U (en) | 2019-08-06 | 2019-08-06 | Drilling, sand blasting and hole reaming device for dry hot rock pneumatic down-the-hole hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210370481U true CN210370481U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921260772.3U Withdrawn - After Issue CN210370481U (en) | 2019-08-06 | 2019-08-06 | Drilling, sand blasting and hole reaming device for dry hot rock pneumatic down-the-hole hammer |
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| Country | Link |
|---|---|
| CN (1) | CN210370481U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359840A (en) * | 2019-08-06 | 2019-10-22 | 吉林大学 | Hot dry rock pneumatic down-the-hole hammer drilling sandblasting reaming hole device |
-
2019
- 2019-08-06 CN CN201921260772.3U patent/CN210370481U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359840A (en) * | 2019-08-06 | 2019-10-22 | 吉林大学 | Hot dry rock pneumatic down-the-hole hammer drilling sandblasting reaming hole device |
| CN110359840B (en) * | 2019-08-06 | 2024-01-09 | 吉林大学 | Dry hot rock pneumatic down-the-hole hammer drilling sand blasting reaming device |
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