CN213330913U - Water jet internal slag-removing drill bit - Google Patents
Water jet internal slag-removing drill bit Download PDFInfo
- Publication number
- CN213330913U CN213330913U CN202021560319.7U CN202021560319U CN213330913U CN 213330913 U CN213330913 U CN 213330913U CN 202021560319 U CN202021560319 U CN 202021560319U CN 213330913 U CN213330913 U CN 213330913U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- chip removal
- jet
- channel
- main part
- 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
Images
Abstract
The utility model discloses a sediment formula drill bit is arranged in water jet, set up the drilling rod connecting seat in drill bit main part rear end including drill bit main part and coaxial fixed, the axis position of drill bit main part is equipped with the chip removal passageway that runs through drill bit main part and drilling rod connecting seat, the front end of chip removal passageway is the chip removal hole, the axial direction along the drill bit main part still is equipped with a plurality of jet flow channels that run through drill bit main part and drilling rod connecting seat, and a plurality of jet flow channels set up around chip removal passageway central symmetry for the axis of drill bit main part, the front end of jet flow channel is the jet orifice, the position that jet flow channel is close to drill bit main part front end face is equipped with the reposition of redundant personnel passageway that link up the setting with chip removal. The water jet internal deslagging type drill bit can discharge coal rock debris from the hollow drill rod on the premise of reducing deviation of a drilling track, and is particularly suitable for gas drainage hole drilling construction.
Description
Technical Field
The utility model relates to a drill bit specifically is a sediment formula drill bit is arranged in water jet suitable for drilling in pit in colliery belongs to coal mine safety technical field.
Background
At present, the mine gas treatment in China generally adopts a gas extraction technology, and the gas extraction still takes the gas extraction in the underground industry as a main measure, namely: drilling a coal seam and a gas gathering area, connecting the drilled holes to a special pipeline, and pumping gas in the coal seam and a goaf to the ground by using pumping equipment for utilization or discharging the gas into a total return air flow.
During gas drainage hole drilling construction, drilling track deviation often can appear, and drilling deviation not only can influence the drainage effect of gas, and serious meeting causes the drilling leucorrhea moreover, can bring huge outstanding danger for subsequent drilling operation, and then leads to the emergence of incident. The deviation of the drilling track is generally influenced by the self weight of the drilling tool, geological conditions, drilling parameters, drilling process, drilling equipment, personnel factors and the like, wherein the geological conditions and the drilling process are the most important factors, and when the drill bit meets the texture condition of soft and hard staggering, the drill bit can deviate to a soft region due to different crushing capacities of the drill bit on the soft and hard coal rocks, so that the drilling track is deviated.
In addition, in the drilling tool commonly used at present, the slag discharging power is generally a fluid slag discharging mode and a mechanical slag discharging mode. The fluid is arranged at the bottom of a drilling hole from a cavity of the drill rod, the deslagging space is an annular space between the wall of the drilling hole behind the drill bit and the drill rod, and the deslagging space is discharged through a spiral discharging structure arranged on the drill rod, so that the deformation and damage conditions of the hole wall have great influence on the change of the size of the deslagging space, the phenomena of blockage, drill jamming and drill holding are easy to occur, the drill rod is even broken, and the influence on the depth and the drilling efficiency of the drilling hole is great.
Disclosure of Invention
To the above problem, the utility model provides a sediment formula drill bit is arranged in water jet can realize utilizing the cavity drilling rod to discharge the coal rock bits from the pole under the prerequisite that realizes reducing the skew volume of drilling orbit, and the specially adapted gas is taken out and is put the hole drilling construction.
In order to achieve the purpose, the water jet internal slag removal type drill bit comprises a drill bit main body and a drill rod connecting seat coaxially and fixedly arranged at the rear end of the drill bit main body, wherein the front end surface of the drill bit main body is provided with a plurality of cutting wings which are protruded out of the front end surface and are symmetrically arranged relative to the center axis of the drill bit main body, each cutting wing comprises a plurality of cutting tooth positioning steps with the protruded heights gradually decreased from outside to inside, and the cutting teeth with the matched number are fixedly arranged on the cutting tooth positioning steps in sequence; the axis position of drill bit main part is equipped with the chip removal passageway that runs through drill bit main part and drilling rod connecting seat, the front end of chip removal passageway is the chip removal hole, still be equipped with a plurality of jet channels that run through drill bit main part and drilling rod connecting seat along the axial direction of drill bit main part, and a plurality of jet channels set up around chip removal passageway central symmetry for the axis of drill bit main part, jet channel's front end is the jet orifice, the position that jet channel is close to drill bit main part front end face is equipped with the reposition of redundant personnel passageway that link up the setting with chip removal passageway, and the inside rear slope of reposition of redundant personnel passageway.
As the utility model discloses a further improvement scheme, the fluidic channel that is located the drill bit main part includes preceding path section and back path section, connects through toper pressure boost mouth intercommunication between preceding path section and the back path section.
As a further improvement of the present invention, the whole jet channel located in the drill bit body is an inclined hole structure inclined toward the inside or the outside, or the front small diameter section of the jet channel located in the drill bit body is an inclined hole structure inclined toward the inside or the outside.
As a further improvement of the utility model, the region around the chip removal hole on the preceding terminal surface of drill bit main part still fixedly is equipped with the cutting edge.
As an embodiment of the present invention, the cutting teeth are polycrystalline diamond compact cutting teeth, and the cutting edge is a diamond cutting edge.
As a further improvement of the utility model, the chip removal channel in the drill bit body is a tapered hole structure with a small front part and a big back part.
As a further improvement of the utility model, the drill bit main body and the drill rod connecting seat are of an integrated structure.
Compared with the prior art, when the deslagging type drill bit in the water jet flows to carry out drilling operation, on one hand, high-pressure water is sprayed out through the jet hole on the front end surface of the drill bit main body through the jet channel to crush the coal rock mass, on the other hand, the cutting teeth crush the coal rock mass simultaneously when the drill bit main body rotates, the phenomenon that the drill bit deflects to a softer region when soft and hard staggered texture is met is greatly reduced, and when the high-pressure water is sprayed out through the jet hole, a part of the high-pressure water is sprayed into the chip removal channel through the diversion channel in an inclined backward direction to enable the chip removal channel to be positioned in the front region of the outlet position of the diversion channel to form a local negative pressure environment, so that most crushed coal rock fragments flow into the chip removal channel through the chip removal hole under the action of drilling reaction force and negative pressure and continuously move backward to enter the chip removal channel, the small crushed coal rock fragments enter the space between the forming drill hole and the hollow drill rod under the action of the drilling reaction force, can be discharged through the chip guide blades, or the chip guide protrusions or the chip guide grooves which are arranged on the outer wall of the hollow drill rod and are integrally arranged in a spiral direction, can greatly reduce the phenomena of blockage, drill jamming and drill holding, and is particularly suitable for drilling construction of the gas drainage hole.
Drawings
FIG. 1 is a schematic structural view of a front end face of a drill bit body according to the present invention;
fig. 2 is a sectional view a-a of fig. 1.
In the figure: 1. the drill bit comprises cutting teeth, 2 cutting wings, 3 chip removal holes, 4 jet holes, 5 drill bit bodies, 6 conical pressurizing ports, 7 chip removal channels, 8 jet channels, 9 drill rod connecting seats, 10 cutting edges, 11 flow dividing channels.
Detailed Description
The present invention will be further described with reference to the drawings (hereinafter, the drilling direction of the water jet internal slagging drill bit is described as the front, that is, the upper side of fig. 1 is the drilling direction, the direction toward the central axis of the drill bit body 5 is the inner side direction, and the direction away from the central axis of the drill bit body 5 is described as the outer side direction).
As shown in fig. 1 and 2, the water jet internal slag removal type drill bit comprises a drill bit body 5 and a drill rod connecting seat 9 coaxially and fixedly arranged at the rear end of the drill bit body 5, wherein the drill bit body 5 and the drill rod connecting seat 9 can be of an integrated structure, a plurality of cutting wings 2 protruding out of the front end face are arranged on the front end face of the drill bit body 5, the plurality of cutting wings 2 are symmetrically arranged relative to the center axis of the drill bit body 5, each cutting wing 2 comprises a plurality of cutting tooth positioning steps with the protruding heights gradually decreased from outside to inside along the radial direction of the drill bit body 5, and the cutting teeth 1 with the matched number are sequentially and fixedly arranged on the cutting tooth positioning steps; the axis position of drill bit main part 5 is equipped with chip removal passageway 7 that runs through drill bit main part 5 and drill rod connecting seat 9, chip removal passageway 7's front end is chip removal hole 3, the axial direction along drill bit main part 5 still is equipped with a plurality of jet flow channel 8 that run through drill bit main part 5 and drill rod connecting seat 9, and a plurality of jet flow channel 8 set up around chip removal passageway 7 central symmetry for the axis of drill bit main part 5, jet flow channel 8's front end is jet hole 4, the position that jet flow channel 8 is close to drill bit main part 5 preceding terminal surface is equipped with the reposition of redundant personnel passageway 11 that link up the setting with chip removal passageway 7, and reposition of redundant personnel passageway 11 is to the inside rear.
When the water jet internal slag-removing type drill bit is fixedly installed on a hollow drill rod corresponding to a slag removal channel and a jet channel in a butt joint mode through a drill rod connecting seat 9 and then drilling operation is carried out, the hollow drill rod drives the water jet internal slag-removing type drill bit to rotate together, on one hand, high-pressure water is sprayed out through a jet hole 4 in the front end face of a drill bit main body 5 through a jet channel 8 to crush a coal rock body, on the other hand, cutting teeth 1 simultaneously crush the coal rock body while the drill bit main body 5 rotates, the phenomenon that the drill bit deflects to a softer region when soft and hard staggered texture conditions are met is greatly reduced, while high-pressure water is sprayed out through the jet hole 4, part of high-pressure water is obliquely sprayed backwards into the slag removal channel 7 through a diversion channel 11, so that a local negative pressure environment is formed in the front region of the outlet position of the slag removal channel 7, and most of crushed coal rock chips gush into the slag removal channel 7 through, And the coal rock fragments after being broken in small parts enter a space between the forming drill hole and the hollow drill rod under the action of drilling reaction force, and can be discharged through a chip guide blade, a chip guide bulge or a chip guide groove which is arranged on the outer wall of the hollow drill rod and is integrally arranged in a spiral direction, so that the phenomena of blockage, drill jamming and drill holding can be greatly reduced.
In order to realize the incident pressure of increase water jet, as the utility model discloses a further improvement scheme, the fluidic channel 8 that is located drill bit main part 5 includes preceding path section and back path section, connects through 6 intercommunications of toper pressure boost mouth between preceding path section and the back path section.
In order to realize better water jet effect, as the utility model discloses a further improvement scheme, the fluidic channel 8 that is located in drill bit main part 5 is whole to be the inclined hole structure that sets up to the slope of inboard or outside direction, or the preceding path segment that is located fluidic channel 8 in drill bit main part 5 is the inclined hole structure that sets up to the slope of inboard or outside direction. When the jet channel 8 in the drill bit main body 5 is obliquely arranged towards the inner side, high-pressure water sprayed from the jet hole 4 can be gathered at one point, and the strength of the water jet can be increased; when the jet channel 8 in the drill bit main body 5 is obliquely arranged towards the outer side, the high-pressure water sprayed from the jet hole 4 can realize the effect of divergence relative to the axis, and the operation range of the water jet can be enlarged.
In order to further realize improving the crushing effect to the coal petrography body to in the smooth chip removal passageway 7 that gets into of coal petrography, as the utility model discloses a further improvement scheme, the region around chip removal hole 3 on the preceding terminal surface of drill bit main part 5 still fixes being equipped with cutting edge 10, and the rotatory in-process of drill bit main part 5, the coal petrography piece of gathering at chip removal hole 3 front end can be further cut by cutting edge 10 and broken refines, is convenient for get into chip removal passageway 7 smoothly.
As an embodiment of the present invention, the cutting teeth 1 are polycrystalline diamond compact cutting teeth, and the cutting edge 10 is a diamond cutting edge.
In order to be more favorable to the regional local negative pressure environment that forms of chip removal passageway 7 front portion, as the utility model discloses a further improvement scheme, the chip removal passageway 7 that is located drill bit main part 5 is big taper hole structure in the front. The volume of the front area of the conical hole structure is relatively small, and when high-pressure water is obliquely sprayed backwards into the chip removal channel 7 through the diversion channel 11, the front area of the chip removal channel 7 is more favorable for forming a local negative pressure environment; the rear area of the conical hole structure is relatively large in size, and after the coal and rock fragments flow into the chip removal channel 7, the coal and rock fragments can move backwards continuously under the impact force of high-pressure water to prevent blockage.
Claims (7)
1. A water jet internal slag removal type drill bit comprises a drill bit main body (5) and a drill rod connecting seat (9) coaxially and fixedly arranged at the rear end of the drill bit main body (5), wherein a plurality of cutting wings (2) protruding out of the front end face are arranged on the front end face of the drill bit main body (5), the plurality of cutting wings (2) are symmetrically arranged relative to the center axis of the drill bit main body (5), each cutting wing (2) comprises a plurality of cutting tooth positioning steps with the protruding heights gradually decreased from outside to inside, and the cutting teeth (1) in the matched number are sequentially and fixedly arranged on the cutting tooth positioning steps;
the drill bit is characterized in that a chip removal channel (7) penetrating through the drill bit body (5) and the drill rod connecting seat (9) is arranged at the central axis position of the drill bit body (5), chip removal holes (3) are formed in the front end of the chip removal channel (7), a plurality of jet flow channels (8) penetrating through the drill bit body (5) and the drill rod connecting seat (9) are further arranged in the axial direction of the drill bit body (5), the jet flow channels (8) are symmetrically arranged around the chip removal channel (7) relative to the central axis of the drill bit body (5), the front end of each jet flow channel (8) is a jet flow hole (4), a flow distribution channel (11) penetrating through the chip removal channel (7) is arranged at the position, close to the front end face of the drill bit body (5), of each jet flow distribution channel (11) and the corresponding to the.
2. The water jet internal slagging drill bit according to claim 1, characterized in that the jet channel (8) in the drill bit body (5) comprises a front small diameter section and a rear large diameter section, which are connected in communication by a conical pressurization port (6).
3. The waterjet internal-slagging drill bit according to claim 2, characterized in that the entire jet channel (8) located in the drill bit body (5) is an inclined-hole structure inclined in the inner or outer direction, or the front small-diameter section of the jet channel (8) located in the drill bit body (5) is an inclined-hole structure inclined in the inner or outer direction.
4. The water jet internal slag removal drill bit as claimed in claim 1, 2 or 3, characterized in that the region of the front end face of the drill bit body (5) surrounding the chip removal hole (3) is also fixedly provided with a cutting edge (10).
5. The waterjet internal row drag drill bit according to claim 4, wherein the cutting tooth (1) is a polycrystalline diamond compact cutting tooth and the cutting edge (10) is a diamond cutting edge.
6. The waterjet inner row drill bit as claimed in claim 1 or 2 or 3, characterized in that the debris removal channel (7) in the drill bit body (5) is a tapered hole structure with a small front and a large rear.
7. The waterjet internal-slagging drill bit according to claim 1, 2 or 3, characterized in that the drill bit body (5) and the shank-connecting seat (9) are of one-piece construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021560319.7U CN213330913U (en) | 2020-07-31 | 2020-07-31 | Water jet internal slag-removing drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021560319.7U CN213330913U (en) | 2020-07-31 | 2020-07-31 | Water jet internal slag-removing drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213330913U true CN213330913U (en) | 2021-06-01 |
Family
ID=76093289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021560319.7U Active CN213330913U (en) | 2020-07-31 | 2020-07-31 | Water jet internal slag-removing drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213330913U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309472A (en) * | 2021-07-02 | 2021-08-27 | 重庆大学 | Three-channel reverse circulation drill bit |
| CN116122721A (en) * | 2023-04-13 | 2023-05-16 | 陕西省外经贸建设集团有限公司 | Drilling device for building construction |
-
2020
- 2020-07-31 CN CN202021560319.7U patent/CN213330913U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309472A (en) * | 2021-07-02 | 2021-08-27 | 重庆大学 | Three-channel reverse circulation drill bit |
| CN116122721A (en) * | 2023-04-13 | 2023-05-16 | 陕西省外经贸建设集团有限公司 | Drilling device for building construction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213330913U (en) | Water jet internal slag-removing drill bit | |
| CN105089500B (en) | Underground coal mine waterpower sprays tree-shaped drilling way-type drilling unit | |
| CN109025831B (en) | Hybrid PDC drill bit based on jet technology | |
| CN111021964B (en) | Down-the-hole hammer reverse circulation pipe-following drill bit suitable for large-diameter drilling | |
| CN202788631U (en) | Hydraulic jet drill | |
| CN108798540B (en) | Spiral convex rib hole-cutting pressure-relief internal slag-discharging drill rod | |
| CN103924938B (en) | A kind of coal mine gas drainage holes scouring bit, hole cleaning device and clear hole method | |
| CN109372536A (en) | A kind of development machine and its driving method using pressure (hydraulic) water broken rock | |
| CN109057715A (en) | A kind of compound PDC speed-raising drill bit cutting hardpan | |
| CN110067516B (en) | Quick impact-scraping and cutting combined rock breaking PDC drill bit | |
| CN205778560U (en) | It is bit Integrated that centering type hydraulic bores expansion | |
| CN203097723U (en) | Rotary jet-flow PDC drill bit | |
| CN107989554A (en) | A kind of particle impacting PDC drilling bits | |
| CN2137563Y (en) | Rotary jet-flow generating device with guide impeller | |
| CN111894477B (en) | Outburst coal seam hole protection and pressure relief combined drilling tool and using method thereof | |
| CN102966310A (en) | Induced flow device and method for water jet kerf in drilled hole | |
| CN211201769U (en) | Down-the-hole hammer reverse circulation follow pipe drill bit suitable for large-diameter drilling | |
| CN202483446U (en) | Drilling, reaming and centering combined bit | |
| CN207647471U (en) | A kind of particle punching drilling PDC drill bit | |
| CN204040915U (en) | horizontal well safe and efficient gas drilling jet mill drill bit | |
| CN209761345U (en) | Self-advancing type porous jet drill bit with supporting plate | |
| CN207160992U (en) | A kind of pdc drill bits of multiple rows of toothing | |
| CN112282657B (en) | Mixed structure gas drilling bit based on preferential rock breaking in easily-broken area | |
| CN211342787U (en) | Efficient well drilling drill bit breaks rock | |
| CN209908414U (en) | Quick impact-scraping combined rock breaking PDC drill bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |