CN207776796U - A kind of drilling bit of multiple rollers and way-type drilling unit - Google Patents
A kind of drilling bit of multiple rollers and way-type drilling unit Download PDFInfo
- Publication number
- CN207776796U CN207776796U CN201721922440.8U CN201721922440U CN207776796U CN 207776796 U CN207776796 U CN 207776796U CN 201721922440 U CN201721922440 U CN 201721922440U CN 207776796 U CN207776796 U CN 207776796U
- Authority
- CN
- China
- Prior art keywords
- tooth
- bit
- gear wheel
- drilling
- multiple rollers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model provides a kind of drilling bit of multiple rollers, is disposed with bit body, multiple palms and multiple gear wheels from top to bottom；Bit body is provided with the external screw thread and inner via hole that axis extends up and down, and multiple palms are circumferentially uniformly distributed along axis and are set to bit body lower end, each gear wheel is set to a palm by shaft；Any gear wheel is along itself circumferentially disposed multiple rows of tooth；Multiple rows of tooth stagger arrangement distribution；The lateral wall of any tooth is provided with the guide groove and lead tooth that length extends along tooth length direction；The lateral wall of bit body is provided perpendicular to the card slot of axis direction.The drilling bit of multiple rollers of the utility model, since multiple rows of tooth stagger arrangement is distributed, the lateral wall of tooth is provided with guide groove and leads tooth, strengthens the connection of tooth and gear wheel significantly, increases tolerance of the tooth to drilling well firm hard formation；And it facilitates the installation of drill bit perpendicular to the card slot of axis direction and changes.On this basis, the utility model additionally provides a kind of way-type drilling unit.
Description
Technical field
The utility model is related to coal mine oil drilling technology fields, in particular to a kind of drilling bit of multiple rollers and combination
Drilling tool.
Background technology
Rock bit is a kind of most popular drilling bit.Cutting tooth alternately contacts shaft bottom when rock bit works,
Broken rock torque is small, and cutting tooth and shaft bottom contact area are small, higher than pressing, and is easy to wedging stratum；Work edge total length is big, thus opposite
Reduce abrasion.Rock bit can adapt to a variety of stratum from soft to hard.
Rock bit can be divided into single-cone rotary drill bit, tricone bit and assembling drilling bit of multiple rollers by gear wheel quantity.By cutting
Material can be divided into steel-tooth (mill teeth) and insert bit.
In actual engineer operation, rock bit is under the action of bit pressure and drill string rotating, tooth crushing and wedging rock
Stone, while generating certain sliding and shearing rock.When gear wheel is when shaft bottom rolls, the tooth on gear wheel is impacted, is pressed into successively
Stratum.Therefore tooth is required to have enough durabilities, and require the connection of the bearing of gear wheel and palm reliable enough.
However, traditional rock bit is all difficult to meet durability requirements after prolonged operation, also, in rotary drill
When head is installed with drill string, it usually needs gear wheel and palm are packed into tool for fastening/disengaging, tightened by the realization of rotary drilling roofbolt affixed.It is this
Connection, separation method make gear wheel and palm bear very large torque, are easily damaged gear wheel and bearing, reduce the work effect of rock bit
Rate shortens the service life of rock bit.
So how to improve the structure design of rock bit, improves the service efficiency of rock bit, reduces the damage of parts
Consumption is those skilled in the art's urgent problem to be solved.
Utility model content
The purpose of this utility model is to provide a kind of drilling bit of multiple rollers and way-type drilling units, to solve tooth in the prior art
Take turns the problems such as drill bit existing tooth during installation and use is easy to wear, gear wheel and palm axis connection stability are insufficient.
To achieve the goals above, the utility model uses following technical scheme：
A kind of drilling bit of multiple rollers provided by the utility model is disposed with bit body, multiple palms and more from top to bottom
A gear wheel；The bit body is provided with the external screw thread and inner via hole that axis extends up and down, and multiple palms are along axis week
It is set to the bit body lower end to being uniformly distributed, each described gear wheel is set to a palm by shaft；It is any
The gear wheel is along itself circumferentially disposed multiple rows of tooth；Multiple rows of tooth stagger arrangement distribution；The lateral wall of any tooth is arranged
There are the guide groove and lead tooth that length extends along the tooth length direction；The lateral wall of the bit body is provided perpendicular to the axis
The card slot in line direction.
Further, the tooth is inserted.The technical solution has technical effect that：It is inserted can unrestricted choice installation, one
As be since gear wheel is larger, in order to reduce cost or easy to process, gear wheel and teeth tooth separate machined, by two after respectively processing
Person is set in together.Different teeth can be installed according to geological conditions, be commonly used in firm hard formation, it is hard in being also used for and softly
Layer.Meanwhile inserted face surfacing abrasion resistance material improves bit cutting while holding tooth drill bit high rate of penetration
The service life of tooth.
Further, the tooth is chisel teeth, conical tooth, hemi-spherical ended shape insert or flat-top shape tooth.The technology of the technical solution is imitated
Fruit is：Chisel teeth is suitable for plasticity abrasive layer hard and hard small；Conical tooth is suitable for hard big with abrasiveness
Stratum；Hemi-spherical ended shape insert and flat-top shape tooth are suitable for high abrasive firm hard formation.
Further, the tooth is in interference fit with the gear wheel.The technical solution has technical effect that：Tooth interference is matched
The structure of conjunction can greatly increase mounting stability of the tooth on gear wheel, prevent tooth loose or dislocation in use.
Further, the gear wheel appearance surfacing hard alloy bisque.The technical solution has technical effect that：In gear wheel appearance
Surfacing hard alloy bisque can effectively enhance the durability of gear wheel, coordinate with tooth, and greatly prolong drilling bit of multiple rollers uses the longevity
Life.
Further, the tooth is mill teeth.The technical solution has technical effect that：The drilling bit of multiple rollers of mill teeth type
In, tooth is integrated with cone shell, by gear wheel blank by being milled into.In order to improve the wearability of tooth,
Surfacing cemented carbide powder on tooth face.Wherein, mill teeth is mainly chisel teeth, influences the major parameter of its working efficiency and ability and is
Tooth height and tooth angle.
Further, the gear wheel includes main cone and back cone.The technical solution has technical effect that：Main cone and back cone are set
It counts structure and is on the one hand conducive to installation fixation, on the other hand so that gear wheel has more round and smooth shape, done conducive to the cutting of tooth
Work(.
Further, the gear wheel further includes one or more pair cone.The technical solution has technical effect that：Multiple pairs
The structure design of cone coordinates multiple rows of tooth distribution, facilitates installation inserted, or convenient for the molding of mill teeth.
Further, further include hydrophthalmia and oil storage compensation system；The hydrophthalmia is set to the bit body, with the inner via hole
Connection；The oil storage compensation system is set in the gear wheel.The technical solution has technical effect that：Hydrophthalmia and oil storage compensation
System is used to provide flushing, cooling, the effect of lubrication, and can guarantee both quality and quantity the construction task for completing drilling.
The utility model also provides a kind of way-type drilling unit, including drill string and above-mentioned drilling bit of multiple rollers；The drilling rod
Column is spirally connected by the external screw thread and the bit body.
The utility model has the beneficial effects that：
1, drilling bit of multiple rollers is distributed due to multiple rows of tooth stagger arrangement, and the lateral wall of tooth is provided with guide groove and leads tooth, greatly
Consolidate the connection of tooth and gear wheel, increases tolerance of the tooth to drilling well firm hard formation.
2, drilling bit of multiple rollers is provided with the guide groove and lead tooth that length extends along tooth length direction, facilitates the installation of drill bit
With change, also avoid gear wheel and palm from bearing excessive torque, the service life of rock bit can be extended.
Description of the drawings
It, below will be to specific implementation mode in order to illustrate more clearly of the technical solution of specific embodiment of the present invention
Attached drawing needed in description is briefly described.It should be evident that the accompanying drawings in the following description is the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram for the drilling bit of multiple rollers that the utility model embodiment provides；
Fig. 2 is the internal structure schematic diagram for the drilling bit of multiple rollers that the utility model embodiment provides；
Fig. 3 is the sectional view of the gear wheel for the drilling bit of multiple rollers that the utility model embodiment provides；
Fig. 4 is the outline drawing of the tooth for the drilling bit of multiple rollers that the utility model embodiment provides；
Fig. 5 is the A-A direction views of Fig. 4；
Fig. 6 is the structural schematic diagram for the way-type drilling unit that the utility model embodiment provides.
Reference numeral：
1- bit bodys；2- palms；3- gear wheels；
4- teeth；5- external screw threads；6- inner via holes；
7- guide grooves；8- leads tooth；9- card slots；
10- main cones；11- back cones；12- pairs are bored；
13- drill strings.
Specific implementation mode
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicality
Novel protected range.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
DESCRIPTION OF THE PRIOR ART：
Rock bit is a kind of most popular drilling bit.Cutting tooth alternately contacts shaft bottom when rock bit works,
Broken rock torque is small, and cutting tooth and shaft bottom contact area are small, higher than pressing, and is easy to wedging stratum；Work edge total length is big, thus opposite
Reduce abrasion.Rock bit can adapt to a variety of stratum from soft to hard.
Rock bit can be divided into single-cone rotary drill bit, tricone bit and assembling drilling bit of multiple rollers by 3 quantity of gear wheel.By cutting
Steel-tooth (mill teeth) and insert bit can be divided by cutting material.
In actual engineer operation, rock bit is under the action of bit pressure and drill string rotating, the crushing of tooth 4 and wedging rock
Stone, while generating certain sliding and shearing rock.When gear wheel 3 is when shaft bottom rolls, the tooth 4 on gear wheel 3 is impacted, is pressed successively
Enter stratum.Therefore tooth 4 is required to have enough durabilities, and it is reliable enough to require gear wheel 3 to be connect with the bearing of palm 2.
However, traditional rock bit is all difficult to meet durability requirements after prolonged operation, also, in rotary drill
When head is installed with drill string 13, it usually needs gear wheel 3 and palm 2 are packed into tool for fastening/disengaging, tightened by the realization of rotary drilling roofbolt 13 solid
It connects.This connection, separation method make gear wheel 3 and palm 2 bear very large torque, are easily damaged gear wheel 3 and bearing, reduce gear wheel 3
The working efficiency of drill bit shortens the service life of rock bit.
So how to improve the structure design of rock bit, improves the service efficiency of rock bit, reduces the damage of parts
Consumption is those skilled in the art's urgent problem to be solved.
The utility model specific embodiment：
Embodiment one：
A kind of drilling bit of multiple rollers is present embodiments provided, wherein：Fig. 1 is that the multiple tri-cone rotary that the utility model embodiment provides bores
The structural schematic diagram of head；Fig. 2 is the internal structure schematic diagram for the drilling bit of multiple rollers that the utility model embodiment provides；Fig. 3 is this
The sectional view of the gear wheel 3 for the drilling bit of multiple rollers that utility model embodiment provides；Fig. 4 is the polydonita that the utility model embodiment provides
Take turns the outline drawing of the tooth 4 of drill bit；Fig. 5 is the A-A direction views of Fig. 4.As shown in Fig. 1~5, drilling bit of multiple rollers is from top to bottom successively
It is provided with bit body 1, multiple palms 2 and multiple gear wheels 3.The bit body 1 is provided with the external screw thread 5 and interior that axis extends up and down
Through-hole 6, multiple palms 2 are circumferentially uniformly distributed along the axis is set to 1 lower end of the bit body, each described gear wheel
3 are set to a palm 2 by shaft；Any gear wheel 3 is along itself circumferentially disposed multiple rows of tooth 4；Multiple rows of tooth
4 stagger arrangement of tooth is distributed；The lateral wall of any tooth 4 is provided with the guide groove 7 and lead that length extends along 4 length direction of the tooth
Tooth 8；The lateral wall of the bit body 1 is provided perpendicular to the card slot 9 of the axis direction.
Drilling bit of multiple rollers provided by the utility model, can preferably solve rock bit in the prior art installation and
The problems such as existing tooth 4 is easy to wear during use, gear wheel 3 is insufficient with 2 axis connection stability of palm：First, multiple tri-cone rotary
Since 4 stagger arrangement of multiple rows of tooth is distributed, the lateral wall of tooth 4 is provided with guide groove 7 and leads tooth 8 drill bit, strengthens tooth 4 and tooth significantly
The connection of wheel 3, increases tolerance of the tooth 4 to drilling well firm hard formation.Secondly, drilling bit of multiple rollers is provided with length along tooth
The guide groove 7 and lead tooth 8 that 4 length directions extend, facilitate the installation of drill bit and change, also avoid gear wheel 3 and palm 2 from bearing excessive
Torque can extend the service life of rock bit.
Embodiment two：
Present embodiments provide a kind of drilling bit of multiple rollers.As shown in Fig. 1~5, drilling bit of multiple rollers is set gradually from top to bottom
There are bit body 1, multiple palms 2 and multiple gear wheels 3；The bit body 1 is provided with the external screw thread 5 and inner via hole that axis extends up and down
6, multiple palms 2 are circumferentially uniformly distributed along the axis is set to 1 lower end of the bit body, each described gear wheel 3 is logical
It crosses shaft and is set to a palm 2；Any gear wheel 3 is along itself circumferentially disposed multiple rows of tooth 4；Multiple rows of tooth 4
Stagger arrangement is distributed；The lateral wall of any tooth 4 is provided with the guide groove 7 and lead tooth that length extends along 4 length direction of the tooth
8；The lateral wall of the bit body 1 is provided perpendicular to the card slot 9 of the axis direction.
Further, as shown in Figure 1, 2, 3, the tooth 4 is inserted.Wherein, it is inserted can unrestricted choice installation, usually
Since gear wheel 3 is larger, in order to reduce cost or easy to process, gear wheel 3 and 4 separate machined of teeth tooth, by two after respectively processing
Person is set in together.Different teeth 4 can be installed according to geological conditions, be commonly used in firm hard formation, it is hard in being also used for and softly
Layer.Meanwhile inserted face surfacing abrasion resistance material improves bit cutting while holding 4 drill bit of tooth high rate of penetration
The service life of tooth 4.
Further, as shown in Figure 1, 2, 3, the tooth 4 is chisel teeth, conical tooth, hemi-spherical ended shape insert or flat-top shape tooth.It should
In the drilling bit of multiple rollers of structure, chisel teeth is suitable for plasticity abrasive layer hard and hard small；Conical tooth is suitable for hard
And the big stratum of abrasiveness；Hemi-spherical ended shape insert and flat-top shape tooth are suitable for high abrasive firm hard formation.
Further, as shown in Figure 1, 2, 3, the tooth 4 is in interference fit with the gear wheel 3.The multiple tri-cone rotary of the structure bores
In head, the structure that tooth 4 is interference fitted can greatly increase mounting stability of the tooth 4 on gear wheel 3, prevent tooth 4 from making
With loose or dislocation in the process.
Further, 3 appearance surfacing hard alloy bisque of the gear wheel.In the drilling bit of multiple rollers of the structure, in 3 appearance of gear wheel
Surfacing hard alloy bisque can effectively enhance the durability of gear wheel 3, coordinate with tooth 4, greatly prolong the use of drilling bit of multiple rollers
Service life.
Embodiment three：
Present embodiments provide a kind of drilling bit of multiple rollers.As shown in Fig. 1~5, drilling bit of multiple rollers is set gradually from top to bottom
There are bit body 1, multiple palms 2 and multiple gear wheels 3；The bit body 1 is provided with the external screw thread 5 and inner via hole that axis extends up and down
6, multiple palms 2 are circumferentially uniformly distributed along the axis is set to 1 lower end of the bit body, each described gear wheel 3 is logical
It crosses shaft and is set to a palm 2；Any gear wheel 3 is along itself circumferentially disposed multiple rows of tooth 4；Multiple rows of tooth 4
Stagger arrangement is distributed；The lateral wall of any tooth 4 is provided with the guide groove 7 and lead tooth that length extends along 4 length direction of the tooth
8；The lateral wall of the bit body 1 is provided perpendicular to the card slot 9 of the axis direction.
Further, as shown in Figure 1, 2, 3, the tooth 4 is mill teeth.In the drilling bit of multiple rollers of mill teeth type, tooth 4 with
3 shell of gear wheel is integrated, by 3 blank of gear wheel by being milled into.In order to improve the wearability of tooth 4, in 4 face of tooth
Upper surfacing cemented carbide powder.Wherein, mill teeth is mainly chisel teeth, the major parameter for influencing its working efficiency and ability be tooth height and
Tooth angle.
Example IV：
Present embodiments provide a kind of drilling bit of multiple rollers.As shown in Fig. 1~5, drilling bit of multiple rollers is set gradually from top to bottom
There are bit body 1, multiple palms 2 and multiple gear wheels 3；The bit body 1 is provided with the external screw thread 5 and inner via hole that axis extends up and down
6, multiple palms 2 are circumferentially uniformly distributed along the axis is set to 1 lower end of the bit body, each described gear wheel 3 is logical
It crosses shaft and is set to a palm 2；Any gear wheel 3 is along itself circumferentially disposed multiple rows of tooth 4；Multiple rows of tooth 4
Stagger arrangement is distributed；The lateral wall of any tooth 4 is provided with the guide groove 7 and lead tooth that length extends along 4 length direction of the tooth
8；The lateral wall of the bit body 1 is provided perpendicular to the card slot 9 of the axis direction.
Further, as shown in figure 3, the gear wheel 3 includes main cone 10 and back cone 11.In the drilling bit of multiple rollers of the structure,
On the one hand the design structure of main cone 10 and back cone 11 is conducive to installation and fixes, on the other hand so that gear wheel 3 have it is more round and smooth outer
Shape, the cutting for being conducive to tooth 4 are done work.
Further, as shown in figure 3, the gear wheel 3 further includes one or more pair cone 12.The multiple tri-cone rotary of the structure bores
In head, the structure design of multiple secondary cones 12 coordinates multiple rows of tooth 4 to be distributed, and facilitates installation inserted, or convenient for the molding of mill teeth.
Further, further include hydrophthalmia and oil storage compensation system；The hydrophthalmia is set to the bit body 1, and described interior
Through-hole 6 is connected to；The oil storage compensation system is set in the gear wheel 3.In the drilling bit of multiple rollers of the structure, hydrophthalmia and oil storage are mended
System is repaid for providing flushing, cooling, the effect of lubrication, can guarantee both quality and quantity the construction task for completing drilling.
The utility model also provides a kind of way-type drilling unit, wherein：Fig. 6 is the way-type drilling unit that the utility model embodiment provides
Structural schematic diagram.It is bored as shown in fig. 6, way-type drilling unit provided in this embodiment includes drill string 13 and above-mentioned multiple tri-cone rotary
Head；The drill string 13 is spirally connected by the external screw thread 5 and the bit body 1.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it
System；Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should
Understand：It still can be with technical scheme described in the above embodiments is modified, either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacements, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of drilling bit of multiple rollers is disposed with bit body, multiple palms and multiple gear wheels from top to bottom；The bit body is set
Be equipped with external screw thread and inner via hole that axis extends up and down, multiple palms be circumferentially uniformly distributed along the axis be set to it is described
Bit body lower end, each described gear wheel are set to a palm by shaft；Any gear wheel is circumferentially set along itself
Set multiple rows of tooth；It is characterized in that,
Multiple rows of tooth stagger arrangement distribution；The lateral wall of any tooth is provided with length and extends along the tooth length direction
Guide groove and lead tooth；The lateral wall of the bit body is provided perpendicular to the card slot of the axis direction.
2. drilling bit of multiple rollers according to claim 1, which is characterized in that the tooth is inserted.
3. drilling bit of multiple rollers according to claim 2, which is characterized in that the tooth is chisel teeth, conical tooth, hemi-spherical ended shape insert
Or flat-top shape tooth.
4. according to claims 1 to 3 any one of them drilling bit of multiple rollers, which is characterized in that the tooth is in interference fit with institute
State gear wheel.
5. according to claims 1 to 3 any one of them drilling bit of multiple rollers, which is characterized in that the gear wheel appearance surfacing is closed firmly
Bronze layer.
6. drilling bit of multiple rollers according to claim 1, which is characterized in that the tooth is mill teeth.
7. according to claims 1 to 3 or 6 any one of them drilling bit of multiple rollers, which is characterized in that the gear wheel include main cone and
Back cone.
8. drilling bit of multiple rollers according to claim 7, which is characterized in that the gear wheel further includes one or more pair
Cone.
9. according to claims 1 to 3 or 6 any one of them drilling bit of multiple rollers, which is characterized in that further include that hydrophthalmia and oil storage are mended
Repay system；The hydrophthalmia is set to the bit body, is connected to the inner via hole；The oil storage compensation system is set to the tooth
In wheel.
10. a kind of way-type drilling unit, which is characterized in that including drill string and such as claim 1~9 any one of them multiple tri-cone rotary
Drill bit；The drill string is spirally connected by the external screw thread and the bit body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922440.8U CN207776796U (en) | 2017-12-29 | 2017-12-29 | A kind of drilling bit of multiple rollers and way-type drilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922440.8U CN207776796U (en) | 2017-12-29 | 2017-12-29 | A kind of drilling bit of multiple rollers and way-type drilling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207776796U true CN207776796U (en) | 2018-08-28 |
Family
ID=63222284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721922440.8U Active CN207776796U (en) | 2017-12-29 | 2017-12-29 | A kind of drilling bit of multiple rollers and way-type drilling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207776796U (en) |
-
2017
- 2017-12-29 CN CN201721922440.8U patent/CN207776796U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108952582A (en) | PDC drill bit suitable for double pendulum speed-raising drilling tool | |
| CN105113995A (en) | Composite drill bit with core rock breaking capability improved | |
| CN206091882U (en) | Formula down --hole hammer drill tied in a bundle advances to use polycrystalline diamond down --hole drill bit | |
| CN207776796U (en) | A kind of drilling bit of multiple rollers and way-type drilling unit | |
| CN206987737U (en) | Multi-functional Composite Bolt drill bit | |
| CN109681122A (en) | A kind of two rank step scraper | |
| CN202483461U (en) | Polycrystalline diamond compact (PDC) bit with six scrapers | |
| CN208456542U (en) | Drilling well neck eye type reaming tool | |
| CN203796171U (en) | Composite drill bit | |
| CN209195264U (en) | A kind of compound geophysical prospecting bit of ball cone suitable for limestone fast drilling | |
| CN204691683U (en) | Novel down-the-hole drill | |
| CN208364057U (en) | A kind of high-strength abrasion-proof drill bit | |
| CN206190214U (en) | Hard rock grinds drill bit | |
| CN203114176U (en) | Roller cone PDC combination tooth drill bit | |
| CN202325302U (en) | Drill rod special for wind power and mechanical cooperated slag discharge | |
| CN105507818B (en) | Guide type combines drills for stone | |
| CN205591861U (en) | Deflecting surface removable tyoe whipstock of windowing | |
| CN103541659B (en) | A kind of Single-cone compound drill bit | |
| CN203729884U (en) | Diamond-impregnated drill bit with arc teeth | |
| CN204511309U (en) | Carbide drill tooth | |
| CN203463017U (en) | Diamond-impregnated bit | |
| CN207647469U (en) | PDC drill bit suitable for slim-hole salt deposit orientation | |
| CN202531167U (en) | Novel coal mining machine cutting pick | |
| CN202483456U (en) | Novel arc-head petroleum drill bit | |
| CN206903590U (en) | A kind of new six wings PDC drill bit of band cone tooth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |