CN220880659U - Slag discharging waterway on double-tube drill bit - Google Patents
Slag discharging waterway on double-tube drill bit Download PDFInfo
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- CN220880659U CN220880659U CN202322434922.0U CN202322434922U CN220880659U CN 220880659 U CN220880659 U CN 220880659U CN 202322434922 U CN202322434922 U CN 202322434922U CN 220880659 U CN220880659 U CN 220880659U
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- 239000002893 slag Substances 0.000 title claims abstract description 24
- 238000007599 discharging Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 238000005553 drilling Methods 0.000 claims abstract description 82
- 239000002352 surface water Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000003111 delayed effect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000012809 cooling fluid Substances 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 239000000110 cooling liquid Substances 0.000 description 23
- 239000013049 sediment Substances 0.000 description 18
- 239000002002 slurry Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 10
- 229910003460 diamond Inorganic materials 0.000 description 8
- 239000010432 diamond Substances 0.000 description 8
- 239000011435 rock Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 238000005336 cracking Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a deslagging waterway on a double-pipe drill bit, which belongs to the technical field of drill bit manufacturing and comprises an end face water gap, an inner circular drilling hole, an outer water tank and a drill bit body, wherein one inner circular drilling hole, one inner water tank and one end face water gap and one outer water tank which are connected with the inner circular drilling hole and the inner water tank are sequentially connected into a complete deslagging groove; the outer water tank is a forward-flowing inclined water tank or a spiral water tank; the drill bit body is evenly provided with a plurality of groups of slag discharging grooves, the waterway structure of the drill bit can be improved on the basis of the existing wear-resistant materials of the drill bit, through reasonable waterway diversion and drainage of an outer inclined water tank or a spiral water tank and an end face water gap, flushing fluid flows more smoothly, the bearing condition of a gauge strip on erosion of cooling fluid is changed, the inner gauge and the outer gauge are protected, the wear speed is delayed, synchronous wear of the inner gauge and the outer gauge of the gauge strip and a working layer can be realized, and the purposes of improving drilling efficiency and reducing the use cost of the drill bit are achieved.
Description
Technical Field
The utility model relates to the technical field of drill bit manufacturing, in particular to a deslagging waterway on a double-pipe drill bit of an electroplated diamond drill bit.
Background
Conventionally used double-tube drill bits (including common double-tube and rope core drill bits) are mostly hot pressed sintered drill bits, but in some places, electroplated double-tube drill bits with better performance than hot pressed drill bits lose size due to the easy abrasion of inner and outer gage, and are rarely used. And the polycrystalline gage used by the hot-pressing drill bit is poor in cutting performance, so that the drilling speed is easy to drop when the inside and outside of the diamond working layer are worn, and the working capacity is lost due to the phenomenon of groove pulling when the drilling speed is severe, so that the diamond working layer is wasted. Actually drill bit
The abrasion of the inner and outer gage is mainly caused by erosion and abrasion of particles carried by the gage layer when the gage layer is washed by the cooling liquid, and the erosion and abrasion of the cooling liquid can accelerate the abrasion of the inner and outer gage of the gage strip, so that the search for a reasonable waterway structural design is a key way for solving the problem from the structural study of a waterway of a drill bit.
Based on the above, the utility model designs a deslagging waterway on a double-pipe drill bit to solve the problems. Is especially suitable for manufacturing electroplated double-tube diamond drill bit.
Disclosure of Invention
The utility model aims to provide a deslagging waterway on a double-pipe drill bit, which can improve the waterway structure of the drill bit on the basis of the existing wear-resistant material of the drill bit, and through reasonable waterway diversion and drainage of an outer inclined water tank and an end face water port, the flow of flushing fluid is smoother, the bearing condition of a gage strip on erosion of cooling liquid is changed, the inner and outer gage is protected, the wear speed is delayed, the inner and outer gage of the gage strip and a working layer can be synchronously worn, and the purposes of improving drilling efficiency and reducing the use cost of the drill bit are realized. The manufacturing technology is especially suitable for manufacturing double-tube diamond drill bits of electroplated diamond drill bits.
The utility model is realized in the following way: a slag removal waterway on a double-tube drill bit, comprising:
The drill bit comprises an end face water gap, an inner circular drilling hole, an outer water tank and a drill bit body;
The drill bit body is a hollow circular tube-shaped double-tube drill bit,
The end surface water gap is a strip-shaped groove arranged on the upper end surface of the drill bit body, the bottom of the groove of the end surface water gap is arc-shaped,
The inner circular drilling hole is a round hole, the inner circular drilling hole is vertically arranged on the inner side wall of the drill bit body, an inner water slot hole is formed in the vertical inner side wall of the drill bit body, and the inner cavity of the inner circular drilling hole is communicated with the inner cavity of the drill bit body through the inner water slot hole;
The outer water tank is arranged on the outer side wall of the drill bit body, the outer water tank is an inclined or spirally arranged strip-shaped groove, and the upper ends of the inner circular drilling hole and the outer water tank penetrate through the upper end face of the drill bit body;
the upper ends of the inner circular drilling holes and the outer water tank are communicated through an end surface water gap;
One inner circular drilling hole is sequentially connected with one end surface water gap and one outer water tank to form a complete slag discharging groove;
a plurality of slag discharging grooves are uniformly distributed on the drill bit body.
Further, the outer side edge of the upper end face of the drill bit body is an outer gage, and the inner side edge of the upper end face of the drill bit body is an inner gage;
The diameter e of the inner circular drilling hole is 1/2 of the radial thickness d of the drill bit.
Further, the depth of the end face water gap is b, the width of the groove of the end face water gap is a, and a is less than or equal to 2b.
Further, the outer water tanks are uniformly distributed in a spiral shape on the outer wall of the drill bit body, and the inclination angle or the spiral angle c of the outer water tanks is in a range of 15-45 degrees.
Further, the width f of the opening of the inner water slot hole on the inner side wall of the drill bit body is smaller than the diameter e of the inner circular drilling hole, and f is less than or equal to 2e/3.
The beneficial effects of the utility model are as follows: 1. according to the utility model, through the small-diameter inner circular drilling, the diffusion of the cooling liquid and the particulate matters can be conveniently limited, and the cooling liquid can be effectively guided, so that the particulate matters are guided by the cooling liquid to avoid the inner diameter-keeping part, and the inner diameter-keeping part is protected;
2. The cooling liquid in the inner cavity of the drill bit body is guided through the concave end face water gap, so that the cooling liquid smoothly flows to the outside, the cooling liquid can flow out without obstruction, the situation that particles stay in the drill bit body to continuously erode the inner gauge is effectively avoided, the bottom of the groove of the end face water gap is arc-shaped, stress concentration is effectively avoided, and the cracking probability of working teeth is reduced;
3. The outer water tank is a plurality of spiral inclined water tanks and is inclined, the inclined outer water tanks are uniformly distributed on the outer wall of the drill bit body in a spiral mode, larger centrifugal force and rotating force can be generated when the drill bit body rotates, cooling liquid and rock powder particles in the outer water tank are smoothly thrown out, the drill bit is prevented from being damaged due to accumulation of impurities, inner circular drilling holes and complete slag discharging grooves formed among the openings of the inner side wall of the drill bit body, the end face water gap and the outer water tank are continuous, and the inner circular drilling holes are the waterway of the drill bit.
Drawings
The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of a drill bit body drilling end face according to the present utility model;
FIG. 3 is a schematic view of a partial structure of the connection between the inside and outside of a single end face nozzle according to the present utility model;
FIG. 4 is a schematic view of the opening structure of the inner circular hole drilled on the inner sidewall of the drill body according to the present utility model.
In the drawings, the list of components represented by the various numbers is as follows:
1-end face water gap, 2-inner gauge, 3-inner circular drilling, 31-inner water notch, 4-outer gauge, 5-outer water tank and 6-bit body.
Detailed Description
Referring to fig. 1 to 4, the present utility model provides a technical solution: a slag removal waterway on a double-tube drill bit, comprising:
The end face water gap 1, the inner circular drilling hole 3, the outer water tank 5 and the drill bit body 6;
the drill bit body 6 is a hollow circular tube-shaped double-tube drill bit,
The end surface water gap 1 is a strip-shaped groove arranged on the upper end surface of the drill bit body 6, the bottom of the groove of the end surface water gap 1 is arc-shaped,
The inner circular drilling hole 3 is a round hole, the inner circular drilling hole 3 is vertically arranged on the inner side wall of the drill bit body 6, and the vertical side edge of the inner circular drilling hole 3 is opened on the vertical inner wall of the drill bit body 6;
The outer water tank 5 is arranged on the outer side wall of the drill bit body 6, the outer water tank 5 is a strip-shaped groove which is obliquely arranged, and the upper ends of the inner circular drilling hole 3 and the outer water tank 5 penetrate through the upper end face of the drill bit body 6;
The upper ends of the inner circular drilling holes 3 and the outer water tank 5 are communicated through the end surface water gap 1;
One inner circular drilling hole 3 is sequentially connected with one end surface water gap 1 and one outer water tank 5 to form a complete slag discharging groove;
The drill bit body 6 is evenly provided with a plurality of slag discharging grooves, the waterway structure of the drill bit can be improved on the basis of the existing wear-resistant materials of the drill bit, through reasonable waterway diversion and through the inclined outer water tank 5 and the drainage of the end face water gap 1, flushing fluid flows more smoothly, the bearing condition of the gauge strip on the erosion of cooling liquid is changed, the inner gauge and the outer gauge are protected, the wear speed is delayed, the inner gauge 2 and the outer gauge 4 of the gauge strip can be synchronously worn with a working layer, and the purposes of improving drilling efficiency and reducing the use cost of the drill bit are achieved.
The upper end face of the drill bit body 6 is further provided with a gage strip, the outer side edge of the gage strip on the drill bit body 6 is an outer gage 4, and the inner side edge of the gage strip of the drill bit body 6 is an inner gage 2;
The width d of the upper end face of the bit body 6 determines the size of the diameter e of the inner circular bore 3. When d=9-12 mm, e=4-6 mm; d=13-16 mm, e=6-8 mm; d=17-22 mm, e=8-12 mm; d=23-30 mm, e=10-15 mm. When d is less than or equal to 8mm, the utility model is not suitable, and d is less than 30 mm.
The depth of the end face water gap 1 is b, the width of the groove of the end face water gap 1 is a, a is less than or equal to 2b, sediment is effectively guided, stress concentration of the end face water gap 1 is avoided, and breakage caused by overlarge stress can be avoided.
The outer water tanks 5 are uniformly and obliquely arranged or spirally distributed on the outer wall of the drill bit body 6, the inclination angles or spiral inclination angles of the outer water tanks 5 are the same, the angle c range is 15-45 degrees, mud can be smoothly guided along the outer water tanks 5 to be thrown out of the drilling range of the drill bit, and sediment is conveniently discharged;
The opening width f of the inner water slot hole 31 on the inner side wall of the drill bit body 6 is smaller than the diameter e of the inner circular drilling hole 3, the radian of the inner circular drilling hole 3 is large, the sealing performance is stronger, sediment in the drill bit body 6 can be better limited and collected, and mud is effectively prevented from returning to the inner cavity of the drill bit body 6.
In one embodiment of the utility model:
The embodiment of the utility model provides a deslagging waterway on a double-pipe drill bit, which solves the technical problems that: 1. the existing double-pipe drill bit has the advantages that the bottom of the existing double-pipe drill bit is a flat circular pipe, different drilling tool bits are inlaid on the end face of the drill bit according to different drilling geological conditions, and diamond and other materials are arranged on the end face of the drill bit, however, when the existing double-pipe drill bit is used for drilling, a rock core is taken in an inner cavity of the drill bit, the inside and the outside of the drill bit can be separated by the drill bit, so that sediment drilled in the inner cavity cannot flow out, remains in the inner cavity of the drill bit to be worn, and the drill bit is accelerated to wear; 2. the conventional drill bit can not discharge sediment generated in drilling of the drill bit, the sediment can only be flushed by means of cooling liquid, the cooling liquid is continuously flushed, the flushing can erode the drill bit, the inner gage 2 is easy to wear and the size is changed, the configuration of coring snap springs or the size loss is not facilitated, the working layer cannot be effectively applied, and the gage strip cannot protect the drill bit; 3. when the drill bit is used for drilling and sampling, the current sediment cannot be discharged, so that the sediment continuously gathers at the bottom of the inner cavity of the drill bit, and the gathered sediment can block the drilling operation of the drill bit, so that the drill bit is unsmooth in work.
The technical problems solved by the utility model are as follows: sediment particles generated during operation of the inner cavity of the drill bit body 6 are guided to flow out, sediment is prevented from being accumulated in the inner cavity 6 of the drill bit to continuously abrade the drill bit, the inner gauge 2 is effectively protected, the drill bit can be protected by the inner gauge 2, the service life of the drill bit is prolonged, and drilling is smoother.
The technical effects are realized as follows: 1. according to the utility model, the diffusion of cooling liquid and particulate matters can be conveniently limited through the small-diameter inner circular drilling hole 3, sediment in the drill bit body 6 is gathered and guided, the sediment is flushed through the cooling liquid, and centrifugal force generated by rotation of the drill bit body 6 can guide and gather the sediment in the inner circular drilling hole 3 through the opening of the inner side wall of the drill bit body 6, and the cooling liquid can be effectively guided through the inner circular drilling hole 3, so that the particulate matters are guided through the cooling liquid to avoid the inner diameter 2 and protect the inner diameter 2, and the inner circular drilling hole 3 is a round hole, so that the sediment is prevented from being blocked in the drill bit body 6 to continuously erode the drill bit and the inner diameter 2;
2. The cooling liquid in the inner cavity of the drill bit body 6 is guided through the concave end face water gap 1, so that sediment accumulated in the inner circular drilling hole 3 smoothly flows to the outside, and the sediment in the inner circular drilling hole 3 is continuously thrown outwards by centrifugal force generated by rotation of the drill bit body 6, so that the cooling liquid is smoothly discharged along with the sediment, the particles are effectively prevented from staying in the drill bit body, the inner gage 2 is continuously eroded, the bottom of the groove of the end face water gap 1 is arc-shaped, stress concentration is effectively avoided, and the cracking probability of working teeth is reduced;
3. The outer water tank 5 is a plurality of spiral inclined water tanks, the inclined outer water tanks 5 are uniformly distributed on the outer wall of the drill bit body 6 in a spiral shape, larger centrifugal force and rotating force can be generated when the drill bit body 6 rotates, cooling liquid and rock powder particles in the outer water tank 5 are smoothly thrown out, the drill bit is prevented from being damaged due to accumulation of impurities, and the inner circular drilling holes 3, the inner water notch 31, the end surface water gap 1 and the outer water tank 5 are continuous, so that complete slag discharging grooves are formed.
The technical scheme in the embodiment of the utility model aims to solve the problems, and the overall thought is as follows:
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
In the manufacturing process, a commonly used double-tube diamond drill bit is taken as the drill bit body 6, and the drill bit body 6 is a hollow circular tube double-tube drill bit; the upper end face of the drill bit body 6 is also provided with a gage strip, the outer side edge of the gage strip on the drill bit body 6 is an outer gage 4, and the inner side edge of the gage strip of the drill bit body 6 is an inner gage 2;
then, an end face water gap 1, an inner circular drilling hole 3 and an outer water tank 5 are formed on the drill bit body 6;
the end face water gap 1 is a strip-shaped groove formed in the upper end face of the drill bit body 6, the bottom of the groove of the end face water gap 1 is arc-shaped, the depth of the end face water gap 1 is b, the width of the groove of the end face water gap 1 is a, and a is less than or equal to 2b.
The inner circular drilling hole 3 is a round hole, the inner circular drilling hole 3 is vertically arranged on the inner side wall of the drill bit body 6, an inner water slot hole 31 is formed in the vertical inner side wall of the drill bit body 6, the inner cavity of the inner circular drilling hole 3 is communicated with the inner cavity of the drill bit body 6 through the inner water slot hole 31, the vertical side edge of the inner circular drilling hole 3 penetrates through the vertical inner wall of the drill bit body 6, a vertical inner water slot hole 31 opening is formed in the inner wall of the drill bit body 6, the inner water slot hole 31 forms a channel between the inner cavity of the inner circular drilling hole 3 and the inner cavity of the drill bit body 6 on the vertical side wall, and the width f of the inner water slot hole 31 of the opening of the inner circular drilling hole 3 on the inner side wall of the drill bit body 6 is smaller than the diameter e of the inner circular drilling hole 3; the width d of the upper end face of the bit body 6 determines the size of the diameter e of the inner circular bore 3,
The diameter e of the inner round hole is determined by the width d of the end face of the drill body 6, and when d=9-12 mm, e=4-6 mm; d=13-16 mm, e=6-8 mm; d=17-22 mm, e=8-12 mm; d=23-30 mm, e=10-15 mm.
The heights of the inner gauge 2 and the outer gauge 4 are lengthened by 30-50% compared with the common drill bit.
The outer water tank 5 is arranged on the outer side wall of the drill bit body 6, the outer water tank 5 is a strip-shaped groove which is obliquely arranged, and the upper ends of the inner circular drilling holes 3 and the outer water tank 5 penetrate through the upper end face of the drill bit body 6; the outer water tanks 5 are uniformly distributed in a spiral shape on the outer wall of the drill bit body 6, and the inclination angle c of the outer water tanks 5 ranges from 15 degrees to 45 degrees.
The inner circular drilling hole 3 is communicated with the upper end of the outer water tank 5 through the end surface water gap 1; so that an inner circular drilling hole 3, an end surface water gap 1 and an outer water tank 5 are sequentially connected to form a complete slag discharging groove; a plurality of such slag discharging grooves are uniformly distributed on the drill bit body 6, each slag discharging groove is an independent channel, and can provide an outflow channel for slurry formed by cooling liquid and rock powder particles in the drill bit body 6, so that the slurry is thrown out of the drill bit body 6 along the slag discharging grooves through centrifugal force.
The bottom of the groove of the end face water gap 1 is lower than the upper end face of the drill bit body 6, the height difference is b, namely when the upper end face of the drill bit body 6 is taken as a reference surface, the groove depth of the end face water gap 1 is b, the groove width of the end face water gap 1 is a, and the groove width a is smaller than or equal to twice the groove depth b.
So just make the inside and outside both sides wall of terminal surface mouth of a river 1 intercommunication drill bit body 6 to with interior circular drilling 3 and the upper end intercommunication of outer basin 5, and interior circular drilling 3 and outer basin 5 do not pierce through the lateral wall of drill bit body 6 on vertical lateral wall, consequently interior circular drilling 3 and outer basin 5 are not directly in the lateral wall intercommunication, can only communicate through the terminal surface mouth of a river 1 of up end.
For convenience of description, the upper end face of the drill, i.e., the upper side in fig. 1, is the end face for drilling.
The width of the inner water notch 31 is smaller than the diameter of the inner circular drilling hole 3 and is 1/3-2/3 of the diameter of the inner circular drilling hole. The diameter e of the inner circular drilling hole 3 formed on the upper end surface of the drill bit body 6 is determined by the radial thickness d of the drill bit, and is approximately 1/2 of the radial thickness d of the drill bit.
The bottom of the end face water gap 1 is arc-shaped, so that stress concentration is avoided, and cracking of the working teeth is reduced. The outer trough 4 is a plurality of spiral inclined troughs, and the spiral angle c is preferably 15-45 degrees. The inner water notch 31 penetrates and is connected with the inner circular drilling hole 3, so that the inner diameter of the drill bit 6 can be cooled conveniently, and rock powder generated by cutting the inner diameter can be removed. The inner water notch 31, the inner circular drilling hole 3, the end surface water gap 1 and the outer water tank 5 are continuous, and are waterways of the utility model.
The diameter e of the inner circular bore 3 is related to the thickness d of the working layer of the drill bit, and the structure is generally unsuitable when d is less than or equal to 9 mm; d, when the diameter is 10-12mm, the diameter e of the inner circular drilling hole 3 is 4-6mm; d when the diameter of the inner circular drilling hole 3 is 13-16mm, the diameter e of the inner circular drilling hole 3 is 6-8mm; d, when the diameter is 17-22, the diameter e of the inner circular drilling hole 3 is 8-12mm; d at 22-30mm the diameter e of the inner circular bore 3 is 10-15mm.
Typically, the depth b of the end nozzle 1, in relation to its width a, should generally be greater than or equal to half the width a/2. The wear-resistant drill bit should have a width of half a/2 plus 1-2.5mm. The efficiency bit may be 1/3 of the width of the nozzle but is not preferably less than 1.5mm.
For the convenience of processing, the width of the end face water gap 1 is generally consistent with that of the outer water tank 4, and the processing is directly finished by a milling cutter.
When the drill core is used, the drill core is continuously rotated through the drill bit body 6, the cooling liquid continuously washes the drill bit to cool, the drill bit can drill out sand and rock according to different geological conditions, particles are generated, rock powder particles are also generated, the rock powder particles and the cooling liquid are mixed into slurry, the slurry can be thrown against the vertical inner side wall of the drill bit body 6 under the action of the rotating centrifugal force of the drill bit body 6, the slurry enters the inner cavity of the inner circular drilling hole 3 along the water notch 31 in the opening of the inner side wall of the drill bit body 6, so that the inner circular drilling hole 3 continuously throws the slurry, the centrifugal force continuously throws the slurry, the slurry continuously throws outwards along the end face water gap 1, and the slurry continuously throws outwards along the outer water groove 5, and finally throws the slurry out of the drill bit body 6 along the inclined outer water groove 5, thereby effectively throwing the slurry out of the drill bit body 6, and effectively avoiding the slurry from gathering in the inner cavity of the drill bit body 6.
And an inner circular drilling hole 3, an end face water gap 1 and an outer water groove 5 are sequentially connected into a complete slag discharging groove, and the slag discharging groove is concave and can not block a mud flow path, so that mud is discharged more smoothly.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.
Claims (5)
1. A slag removal waterway on a double-tube drill bit, comprising: the end face water gap (1), an inner circular drilling hole (3), an outer water tank (5) and a drill bit body (6);
The drill bit body (6) is a hollow circular tube-shaped double-tube drill bit,
The end surface water gap (1) is a strip-shaped groove arranged on the upper end surface of the drill bit body (6), the bottom of the groove of the end surface water gap (1) is arc-shaped,
The inner circular drilling hole (3) is a round hole, the inner circular drilling hole (3) is vertically arranged on the inner side wall of the drill bit body (6), an inner water slot hole (31) is formed in the vertical inner side wall of the drill bit body (6), and the inner cavity of the inner circular drilling hole (3) is communicated with the inner cavity of the drill bit body (6) through the inner water slot hole (31);
The outer water tank (5) is arranged on the outer side wall of the drill bit body (6), the outer water tank (5) is a strip-shaped groove which is obliquely or spirally arranged, and the upper ends of the inner circular drilling hole (3) and the outer water tank (5) penetrate through the upper end face of the drill bit body (6);
The upper ends of the inner circular drilling holes (3) and the outer water tank (5) are communicated through an end surface water gap (1);
One inner circular drilling hole (3), one end surface water gap (1) and one outer water tank (5) are sequentially connected to form a complete slag discharging groove;
a plurality of slag discharging grooves are uniformly distributed on the drill bit body (6).
2. The slag removal waterway on a double tube drill bit of claim 1, wherein: the outer side edge of the upper end face of the drill bit body (6) is an outer gage (4), and the inner side edge of the upper end face of the drill bit body (6) is an inner gage (2);
The diameter e of the inner circular drilling hole (3) is 1/2 of the radial thickness d of the drill bit.
3. The slag removal waterway on a double tube drill bit of claim 1, wherein: the depth of the end face water gap (1) is b, the width of the groove of the end face water gap (1) is a, and a is less than or equal to 2b.
4. The slag removal waterway on a double tube drill bit of claim 1, wherein: the outer water tanks (5) are uniformly distributed on the outer wall of the drill bit body (6), and the inclination angle or the spiral angle c of the outer water tanks (5) is 15-45 degrees.
5. The slag removal waterway on a double tube drill bit of claim 1, wherein: the opening width f of the inner water slot hole (31) on the inner side wall of the drill bit body (6) is smaller than or equal to the diameter e of the inner circular drilling hole (3), and f is less than or equal to 2e/3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322434922.0U CN220880659U (en) | 2023-09-08 | 2023-09-08 | Slag discharging waterway on double-tube drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322434922.0U CN220880659U (en) | 2023-09-08 | 2023-09-08 | Slag discharging waterway on double-tube drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220880659U true CN220880659U (en) | 2024-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322434922.0U Active CN220880659U (en) | 2023-09-08 | 2023-09-08 | Slag discharging waterway on double-tube drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220880659U (en) |
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2023
- 2023-09-08 CN CN202322434922.0U patent/CN220880659U/en active Active
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