CN112922530B - Air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling - Google Patents
Air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling Download PDFInfo
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- CN112922530B CN112922530B CN202110163748.3A CN202110163748A CN112922530B CN 112922530 B CN112922530 B CN 112922530B CN 202110163748 A CN202110163748 A CN 202110163748A CN 112922530 B CN112922530 B CN 112922530B
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- 238000005553 drilling Methods 0.000 title claims abstract description 58
- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- 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
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
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- 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 relates to the technical field of drilling equipment, in particular to an air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling, which comprises a shell, an air distribution mechanism, a rotation mechanism and a drill bit, wherein the air distribution mechanism, the rotation mechanism and the drill bit are sequentially arranged in the shell from top to bottom; the valve mechanism comprises a valve component and a piston component with a front air chamber and a rear air chamber, wherein the movable end of the piston component is provided with an inclined key part which is matched with a spiral bushing contained in the rotary mechanism; the spiral bushing is connected with a drill bit through a spline sleeve which is intermittently meshed with the spiral bushing; the valve component controls air to be alternately introduced into the front air chamber and the rear air chamber to drive the movable end to reciprocate and drive the drill bit to rotate. Has the advantages that: all the mechanisms are arranged in the shell, and torque is transmitted by means of matching of wedge-shaped teeth and key grooves included in the slewing mechanism, so that the structure is compact, and the strength is reliable; the return energy of the piston with the key is used for driving the drill bit to rotate and grind the rock, the stroke energy of the piston with the key is kept to impact and break the rock, and the energy utilization rate is high.
Description
Technical Field
The invention relates to the technical field of drilling equipment, in particular to an air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling.
Background
The pneumatic reverse circulation down-the-hole hammer drilling technology is an efficient and economic drilling method, is widely applied to the fields of geological core drilling, hydrographic water well drilling, foundation engineering construction, oil and gas resource exploitation and the like, has the advantages of high drilling speed of hard rock, good hole forming quality, low gas consumption, high sampling rate, capability of preventing stratum leakage, no pollution to the environment and the like, can effectively reduce the drilling cost, and improves the construction efficiency.
However, the pneumatic down-the-hole hammer needs a drill rod to drive the drill rod to rotate, and cannot directly use a directional tool, so that the borehole trajectory is difficult to accurately detect and control, the pneumatic down-the-hole hammer cannot be directly used for directional hole construction, and only can be matched with a pneumatic screw drill tool to perform composite drilling.
However, the pneumatic screw drill has high rotating speed and long size, increases the process complexity, has low reliability, and cannot fully exert the technical advantages of the pneumatic down-the-hole hammer. In addition, the conventional pneumatic down-the-hole hammer adopts a drill rod to rotate by being driven by an earth surface drilling machine, and has the technical problems of small torque and difficult bit pressure application when being applied to a directional well or a horizontal well, so that the popularization and the application of the pneumatic down-the-hole hammer in the field are limited.
Disclosure of Invention
The invention aims to provide an air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling comprises a shell, an air distribution mechanism, a rotation mechanism and a drill bit, wherein the air distribution mechanism, the rotation mechanism and the drill bit are sequentially arranged in the shell from top to bottom; the valve mechanism comprises a valve component and a piston component with a front air chamber and a rear air chamber, wherein the movable end of the piston component is provided with an inclined key part which is matched with a spiral bushing contained in the rotary mechanism; the spiral bushing is connected with a drill bit through a spline sleeve which is intermittently meshed with the spiral bushing; the valve component controls air to be alternately introduced into the front air chamber and the rear air chamber to drive the movable end to reciprocate, and then the spiral bushing is driven to engage with the spline housing and drive the engaged spline housing and the drill bit to rotate, or the spiral bushing is driven to separate from the spline housing and impact the drill bit.
As a still further scheme of the invention: the piston assembly comprises a core pipe, a piston with a key and an inner cylinder which are sequentially sleeved, and a front air chamber and a rear air chamber which are separated are formed between the piston with the key and the inner cylinder; the valve component comprises an upper connector and a valve group, the upper connector is mounted at the top of the shell, and the valve group is mounted at the top of a core tube gas distribution seat arranged on the core tube through a spring; the bottom end of the core tube gas distribution seat, the inner side of the inner cylinder and the top end surface of the piston with the key form a rear gas chamber; the valve group adopts a check valve.
As a further scheme of the invention: the bottom end of the core tube gas distribution seat, the inner side of the inner cylinder and the top end face of the piston with the key form a rear gas chamber, a plurality of bulges are uniformly distributed in the middle of the core tube, and the bulges are parallel to the axis of the core tube and are matched with the straight key groove in the upper part of the piston with the key.
The shell comprises an upper shell and a lower shell which are in threaded connection with each other, a shell annular channel is reserved between the upper shell and the inner cylinder, and the shell annular channel is communicated with an air inlet of the inner cylinder; the end face of the lower shell, which is close to the valve actuating mechanism, is sequentially provided with a bushing and a spacer bush, and the side faces of the spacer bush and the piston with the key form a front air chamber.
As a still further scheme of the invention: and a wear-resistant lubricating piece is arranged between the spiral bushing and the lower shell step and used for reducing the friction force when the spiral bushing rotates.
As a still further scheme of the invention: the swing mechanism comprises wedge-shaped teeth arranged at the bottom of the spiral bushing, and the wedge-shaped teeth are meshed with a gear ring arranged at the tail end of the spline sleeve; the inner surface of the spiral bushing is provided with a plurality of spiral grooves matched with the inclined keys of the piston with the keys.
As a still further scheme of the invention: the gear ring comprises two semicircular ring wedge-shaped gear rings which are oppositely connected, and the two semicircular ring wedge-shaped gear rings are respectively connected with a bolt at the tail end of the spline housing.
As a still further scheme of the invention: the bottom demountable installation of casing has the locating part, the spacing restraint rotation mechanism of locating part.
Compared with the prior art, the invention has the beneficial effects that: all the mechanisms are arranged in the shell, and torque is transmitted by means of matching of wedge-shaped teeth and key grooves included in the slewing mechanism, so that the structure is compact, and the strength is reliable; the return energy of the piston with the key is utilized to drive the drill bit to rotate and grind the rock, the stroke energy of the piston with the key is kept to impact and break the rock, the energy utilization rate is high, the mechanical drilling speed in the drilling of the hard rock is improved, the drilling tool and the drill rod do not need to rotate, the energy consumption can be greatly reduced, the problem that the torque of the drill bit is difficult to apply in the directional drilling is effectively solved, the service life of the drill rod is prolonged, and the construction of a directional hole and a horizontal hole is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of an air reverse circulation down-the-hole hammer self-rotating drilling tool for directional drilling in an embodiment of the invention.
FIG. 2 is a schematic cross-sectional view taken along line A-A in FIG. 1.
Fig. 3 is a schematic cross-sectional view taken along line B-B in fig. 1.
Fig. 4 is a schematic structural diagram of a swing mechanism according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a housing according to an embodiment of the invention.
In the drawings: 1. an upper joint; 2. a check valve; 3. a spring; 4. an adjusting washer; 5. a core tube; 6. a rear air chamber; 7. an upper housing; 8. an inner cylinder; 9. a keyed piston; 10. a middle spacer bush; 11. a front air chamber; 12. a bushing; 13. a lower housing; 14. a wear-resistant copper ring; 15. a spline housing; 16. a helical liner; 17. a semicircular card; 18. a drill bit; 19. a limit nut;
501. a protrusion; 502. a core tube gas distribution seat step; 701. a housing annular channel; 801. an inner cylinder air inlet; 901. an upper piston ring surface; 902. a straight key groove; 903. a piston mid-torus; 904. a piston lower ring surface; 905. a piston extension section; 906. a feather key; 131. a lower housing step; 141. a copper ring oblique key groove; 151. A ring gear; 152. a pin; 161. an oblique keyway; 162. a circular groove at the bottom of the spiral bushing; 163. wedge-shaped teeth; 181. surface splines of the drill bit.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Referring to fig. 1-5, in the embodiment of the present invention, an air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling includes a housing, an air distribution mechanism, a rotation mechanism and a drill bit 18, wherein the air distribution mechanism, the rotation mechanism and the drill bit 18 are sequentially installed in the housing from top to bottom; the gas distribution mechanism, the swing mechanism and the drill bit 18 are sequentially arranged in the shell from top to bottom; the valve actuating mechanism comprises a valve component and a piston component with a front air chamber 11 and a rear air chamber 6, wherein the movable end of the piston component is provided with an inclined key part which is matched with an inclined key groove 161 of a spiral bushing 16 contained in the rotary mechanism; the spiral bushing 16 is connected with a drill bit 18 through a spline sleeve 15 which is intermittently meshed with the spiral bushing; the valve component controls air to be alternately introduced into the front air chamber and the rear air chamber to drive the movable end to reciprocate, and then the spiral bushing 16 is driven to bite the spline housing 15 and drive the meshed spline housing 15 and the drill bit 18 to rotate, or the spiral bushing 16 is driven to be separated from the spline housing 15 and impact the drill bit 18. The piston assembly comprises a core tube 5, a piston 9 with a key and an inner cylinder 8 which are sequentially sleeved, and a front air chamber and a rear air chamber which are separated are formed between the piston with the key and the inner cylinder; the top of the inner surface of the piston with the key is provided with a plurality of straight key grooves 902 matched with a protrusion 501 arranged in the middle of the outer surface of the core tube, a plurality of inclined keys 906 are circumferentially arrayed at the piston extension section 905 at the bottom end of the outer surface of the piston with the key to form an inclined key part, the valve assembly comprises an upper connector 1 and a valve group, the upper connector 1 is installed at the top of the shell, and the valve group is installed at the top of a core tube gas distribution seat arranged on the core tube 5 through a spring 3; an adjusting washer 4 is arranged between the spring 3 and the step 502 of the air distribution seat of the core tube. The bottom end of the core tube gas distribution seat, the inner side of the inner cylinder 8 and the top end surface of the piston 9 with the key form a rear gas chamber 6; the valve group adopts a check valve 2.
Specifically, during drilling operation, gas enters the drilling tool through the double-wall drill rod and enters the front gas chamber 11 through the inner cylinder gas inlet 801; at the moment, the piston middle ring surface 903 seals an air inlet path of the rear air chamber 6, the rear air chamber 6 is communicated with the hole bottom atmosphere through a piston central channel and the drill bit 18, the pressure of the front air chamber 11 is increased, and the key piston 9 is pushed to move upwards. The inclined key arranged at the lower part of the piston 9 with the key pushes the spiral bushing to move upwards until the spiral bushing is meshed with the spline housing, the piston 9 with the key continues to move upwards, the inclined key drives the spiral bushing to rotate, generated torque is transmitted to the spline housing through the spiral bushing, and then the spline housing drives the drill bit to rotate so as to crush rock at the bottom of the hole. When the key piston 9 moves to the position where the upper ring surface 901 of the piston exceeds the inner cylinder 8 and the matching position of the inner cylinder, gas is distributed by the gas distribution mechanism and enters the rear gas chamber 6, and at the moment, the front gas chamber 11 is communicated with the atmosphere at the bottom of the hole through the corresponding part of the drill bit to push the key piston to move downwards. The inclined key at the bottom of the key-containing piston 9 drives the spiral bushing 16 to be separated from the spline housing 15, the drill bit does not rotate, the key-containing piston rapidly impacts the drill bit downwards, and impact power is transmitted to the broken rock at the bottom of the hole through the drill bit to realize drilling. After the impact is finished, the gas is supplied to the front gas chamber again through the gas distribution mechanism, the piston with the key moves upwards to drive the spiral bushing and the spline housing 15 to drive the drill bit to rotate, and the process is repeated to realize impact rotary drilling. After the gas drives the piston with the key to reciprocate, the residual part enters the drill bit through the exhaust channels of the front air chamber and the rear air chamber and is exhausted to the bottom of the hole through the bottom spray hole of the drill bit, and the cooled drill bit simultaneously carries rock debris to return to the ground surface through the central channel of the core tube.
When the invention is applied, all the mechanisms are arranged in the shell, and the torque is transmitted by the matching of the spiral bushing and the key groove of the key piston, so that the whole structure is compact and the strength is reliable; the return energy of the piston with the key is utilized to drive the drill bit to rotate and grind the rock, the stroke energy of the piston with the key is kept to impact and break the rock, the energy utilization rate is high, the mechanical drilling speed in the hard rock drilling is improved, the spiral bushing and the spline sleeve of the rotating mechanism are intermittently meshed, the drilling tool and the drill rod do not need to rotate, the energy consumption can be greatly reduced, the problem that the torque of the drill bit is difficult to apply in the directional drilling is effectively solved, the service life of the drill rod is prolonged, and the construction of a directional hole and a horizontal hole is facilitated.
Referring to fig. 1-4, in another embodiment of the present invention, the housing includes an upper housing 7 and a lower housing 13 which are screwed to each other, and a housing annular passage 701 is left between the upper housing and the inner cylinder, and the housing annular passage 701 is communicated with the air inlet of the inner cylinder 8; and the end surface of the lower shell 13 close to the valve train is sequentially provided with a lining 12, a middle spacer sleeve 10 and an inner cylinder 8, and is limited by the lower shell 13. The middle spacer bush 10, the side surface of the piston 9 with the key and the middle ring surface 903 of the piston form a front air chamber; the valve group is arranged on the top of a core tube valve seat arranged on the core tube through a spring; an upper piston ring surface 901 and a lower piston ring surface 905 of the piston 9 with the key are respectively in transition fit with the inner walls of the inner cylinder 8 and the lining 12, and the bottom end of the core tube gas distribution seat, the inner side of the inner cylinder and the top end surface of the piston with the key form a rear gas chamber; the upper end of the upper joint 1 is connected with a double-wall drill rod, the lower end of the upper joint is in threaded connection with an upper shell 7, and the valve group adopts a check valve 2.
Referring to fig. 1, 4 and 5, in a preferred embodiment of the present invention, an anti-abrasion lubricating member is disposed between the spiral bushing and the lower housing step 131 for reducing friction force when the spiral bushing rotates.
The wear-resistant lubricating part is characterized in that two wear-resistant copper rings 14 are selected, and the wear-resistant copper rings 14 are arranged between the step of the lower shell and the spiral bushing; the copper ring contact surface is smeared with lubricating and anti-drag substances, so that the friction load generated in the rotation process of the spiral bushing can be effectively reduced, the installation is more convenient compared with a thrust bearing, and the external dimension can be processed according to the requirement.
The inner surface of the wear-resistant copper ring is provided with a copper ring inclined key groove 141, and the copper ring inclined key groove 141 is convenient for mounting the keyed piston 9.
Referring to fig. 1 and 4, in the embodiment of the present invention, the rotating mechanism includes a wedge-shaped tooth 163 disposed at the bottom of the spiral bushing, and the wedge-shaped tooth 163 is engaged with the gear ring 151 disposed at the tail end of the spline housing 15; the inner surface of the spiral bushing 16 is provided with a plurality of spiral grooves or inclined key grooves matched with the inclined keys of the key piston.
Referring to fig. 1, in another embodiment of the present invention, the inner circumferential surface of the spline housing is axially provided with spline grooves for sliding fit with the surface splines 181 of the drill bit; the bottom demountable installation of casing has the locating part, the spacing restraint rotation mechanism of locating part.
The limiting piece comprises a limiting nut 19 arranged on the inner end face of the lower shell and a semicircular clamp 17 buckled on the drill bit; the limiting nut 19 prevents parts in the shell from falling off, and the semicircular clamp 17 is arranged at the upper end of the drill bit to prevent the drill bit from falling off.
The working principle of the invention is as follows: during drilling operation, gas enters a drilling tool through a double-wall drill rod and enters the front gas chamber 11 through the inner cylinder gas inlet 801; at the moment, the piston middle ring surface 903 seals an air inlet path of the rear air chamber 6, the rear air chamber 6 is communicated with the hole bottom atmosphere through a piston central channel and the drill bit 18, the pressure of the front air chamber 11 is increased, and the key piston 9 is pushed to move upwards. The inclined key arranged at the lower part of the piston 9 with the key pushes the spiral bushing to move upwards until the spiral bushing is meshed with the spline housing, the piston 9 with the key continues to move upwards, the inclined key drives the spiral bushing to rotate, generated torque is transmitted to the spline housing through the spiral bushing, and then the spline housing drives the drill bit to rotate so as to crush rock at the bottom of the hole. When the key piston 9 moves to the position where the upper ring surface 901 of the piston exceeds the inner cylinder 8 and the matching position of the inner cylinder, gas is distributed by the gas distribution mechanism and enters the rear gas chamber 6, and at the moment, the front gas chamber 11 is communicated with the atmosphere at the bottom of the hole through the corresponding part of the drill bit to push the key piston to move downwards. The inclined key at the bottom of the key-containing piston 9 drives the spiral bushing 16 to be separated from the spline housing 15, the drill bit does not rotate, the key-containing piston rapidly impacts the drill bit downwards, and impact power is transmitted to the broken rock at the bottom of the hole through the drill bit to realize drilling. After the impact is finished, the gas is supplied to the front gas chamber again through the gas distribution mechanism, the piston with the key moves upwards to drive the spiral bushing and the spline housing 15 to drive the drill bit to rotate, and the process is repeated to realize impact rotary drilling.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
1. An air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling comprises a shell, an air distribution mechanism, a rotation mechanism and a drill bit, wherein the air distribution mechanism, the rotation mechanism and the drill bit are sequentially arranged in the shell from top to bottom; the valve actuating mechanism is characterized by comprising a valve component and a piston component with a front air chamber and a rear air chamber, wherein the movable end of the piston component is provided with an inclined key part which is matched with a spiral bushing contained in the rotary mechanism; the spiral bushing is connected with a drill bit through a spline sleeve which is intermittently meshed with the spiral bushing; the valve component controls gas to be alternately introduced into the front air chamber and the rear air chamber to drive the movable end to reciprocate, so that the spiral bushing is driven to bite the spline housing and drive the meshed spline housing and the drill bit to rotate, or the spiral bushing is driven to be separated from the spline housing and impact the drill bit;
the piston assembly comprises a core pipe, a piston with a key and an inner cylinder which are sequentially sleeved, and a front air chamber and a rear air chamber which are separated are formed between the piston with the key and the inner cylinder; the key piston is characterized in that the top of the inner surface of the key piston is provided with a plurality of straight key grooves which are matched with bulges arranged in the middle of the outer surface of the core tube, a plurality of inclined keys are arranged on the circumference array of the bottom end of the outer surface of the key piston to form inclined key parts, each valve component comprises an upper connector and a valve group, the upper connector is arranged at the top of the shell, and the valve group is arranged at the top of the core tube air distribution seat arranged on the core tube through a spring.
2. The air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling according to claim 1, characterized in that the bottom end of the core tube air distribution seat, the inner side of the inner cylinder and the top end face of the keyed piston form a rear air chamber, a plurality of protrusions are uniformly distributed in the middle of the core tube, and the protrusions are parallel to the axis of the core tube and matched with the straight key grooves in the upper part of the keyed piston.
3. The air reverse circulation down-the-hole hammer self-rotating drilling tool for directional drilling according to claim 1, wherein the casing comprises an upper casing and a lower casing which are in threaded connection with each other, and a casing annular passage is left between the upper casing and the inner cylinder, and the casing annular passage is communicated with the air inlet of the inner cylinder.
4. The air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling according to claim 3, wherein a bushing and a spacer bush are sequentially installed on the end face of the lower shell close to the air distribution mechanism, and the spacer bush and the side face of the piston with the key form a front air chamber.
5. The air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling according to claim 3, wherein an abrasion-resistant lubricating piece is arranged between the spiral bushing and the end face of the upper shell and used for reducing friction force when the spiral bushing rotates.
6. The air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling is characterized in that the rotation mechanism comprises wedge-shaped teeth arranged at the bottom of a spiral bushing, and the wedge-shaped teeth are meshed with a gear ring arranged at the tail end of a spline sleeve; the inner surface of the spiral bushing is provided with a plurality of spiral grooves matched with the inclined keys of the piston with the keys.
7. The air reverse circulation down-the-hole hammer self-rotating drilling tool for directional drilling according to claim 6, wherein the gear ring comprises two semi-annular wedge-shaped gear rings which are oppositely connected, and the two semi-annular wedge-shaped gear rings are respectively connected with a spline sleeve tail end through a bolt.
8. The air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling according to claim 1, wherein a limiting member is detachably mounted at the bottom of the casing, and the limiting member limits and restricts the rotation mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110163748.3A CN112922530B (en) | 2021-02-05 | 2021-02-05 | Air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110163748.3A CN112922530B (en) | 2021-02-05 | 2021-02-05 | Air reverse circulation down-the-hole hammer self-rotation drilling tool for directional drilling |
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| Publication Number | Publication Date |
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| CN112922530A CN112922530A (en) | 2021-06-08 |
| CN112922530B true CN112922530B (en) | 2022-03-29 |
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| CN113250604B (en) * | 2021-06-29 | 2023-10-13 | 重庆科技学院 | Self-air-distribution cluster type pneumatic down-the-hole hammer set |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8104328L (en) * | 1981-07-13 | 1983-01-14 | Nyman Karl Erik | HYDRAULIC SINK DRILLING MACHINE |
| CN201546617U (en) * | 2009-12-08 | 2010-08-11 | 中国地质科学院探矿工艺研究所 | Three-piece air down-the-hole hammer eccentric following drill connected with elastic cylindrical pin assembly |
| CN101956525B (en) * | 2010-09-08 | 2013-05-08 | 吉林大学 | Down-the-hole hammer reverse concentric casing drilling tool |
| CN106050128B (en) * | 2016-08-06 | 2018-03-09 | 吉林大学 | A kind of drill bit is from rotary type pneumatic down-hole hammer |
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