CN215979216U - Concave tooth drill bit - Google Patents
Concave tooth drill bit Download PDFInfo
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- CN215979216U CN215979216U CN202122418729.9U CN202122418729U CN215979216U CN 215979216 U CN215979216 U CN 215979216U CN 202122418729 U CN202122418729 U CN 202122418729U CN 215979216 U CN215979216 U CN 215979216U
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Abstract
The utility model discloses a concave-tooth drill bit which comprises a cylindrical steel body and a tire body arranged at one end of the steel body, wherein the tire body comprises annular outer teeth and annular inner teeth arranged on the inner sides of the outer teeth, the axial lines of the inner teeth and the outer teeth are coincident with the axial line of the steel body, the inner teeth protrude out of one end, back to the steel body, of the outer teeth, and annular grooves are formed between the outer teeth and the inner teeth. The concave-tooth drill bit has the advantages that the structure is simplified and the production cost is reduced by arranging the inner teeth and the outer teeth, and the grooves are arranged between the inner teeth and the outer teeth, so that the drilling pressure is increased, the crushing of a stratum is enhanced, and the footage speed is increased; in addition, the inner teeth protruding out of the end part of the outer teeth have a guiding effect after drilling into the stratum, so that the drill bit is prevented from being eccentrically inclined in the drilling process, and the drilling effect is ensured.
Description
Technical Field
The utility model relates to the technical field of stratum drilling, in particular to a concave tooth drill bit.
Background
The drill bit is an integral part of the drilling apparatus and its main function is to break rock and form the borehole. The rotary drill bit is a drill bit commonly used in the petroleum industry at present, and can rotate under the drive of machinery, so that the whole drill bit is driven to perform centripetal motion, and rocks are cracked and broken through cutting and grinding, so that the effect of drilling downwards is achieved.
In the prior art, in order to avoid drilling inclined holes, most stepped drill bits are adopted for drilling, for example, a three-order drill bit disclosed in the Chinese utility model with the publication number of CN207960502U can play a good guidance quality through a step structure, and is not easy to be eccentric.
However, in the drill bit with the step structure, the lip surface is thick, so that the pressure intensity is small in the drilling process, the footage speed is reduced, and during drilling, granular impurities such as sandstone, crushing and clay which are in contact with the step drill bit are in close contact with the lip surface of the drill bit and are easy to adhere to the surface of the drill bit, so that the drilling efficiency is further reduced; moreover, as the number of steps increases, the overall structure of the drill bit is complicated, and the production cost is increased.
Accordingly, there is a need for improvements in prior art drill bits.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a concave tooth drill bit which is simple in structure, low in production cost and high in drilling efficiency.
In order to realize the technical effects, the technical scheme of the utility model is as follows: the utility model provides a concave tooth drill bit, include the steel body of tube-shape with set up in the matrix of steel body one end, the matrix include cyclic annular external tooth and set up in the inboard cyclic annular internal tooth of external tooth, the internal tooth with the axial lead of external tooth all with the axial lead coincidence of the steel body, the internal tooth protrusion in outer tooth is back to back the one end of the steel body, the external tooth with be provided with annular recess between the internal tooth.
When the concave-tooth drill bit in the technical scheme operates, the steel body is connected with the reamer, the equipment is connected with the outer pipe assembly, the drill bit rotates to drive the annular inner teeth and the annular outer teeth to rotate around the axial lead of the annular inner teeth and the annular outer teeth, and the inner teeth protrude out of one end of the outer teeth back to the steel body, so that the inner teeth firstly drill into the stratum, the rotating range of the inner teeth is limited after drilling is formed, and the drill bit is prevented from being eccentric to a large extent in the rotating process, has a guiding effect, is prevented from inclining in the drilling process, and is suitable for a hard stratum; because be provided with the recess between internal tooth and the external tooth, reduced the size of lip face, consequently under the same drilling pressure, increased pressure, realized the extrusion breakage to the stratum to be favorable to improving the footage speed, and then improve probing efficiency, compare in traditional multistage drill bit, this concave tooth drill bit simple structure is favorable to reduction in production cost.
Preferably, the groove comprises an inner tooth outer wall arranged on the inner tooth and an outer tooth inner wall arranged on the outer tooth; the outer wall of the inner tooth extends from the groove bottom to the groove opening to the inner side of the steel body, and/or the inner wall of the outer tooth extends from the groove bottom to the groove opening to the outer side of the steel body.
Through adopting above-mentioned technical scheme, not only reduced the lip face size of drill bit, increased the pressure of creeping into to strengthen the crushing effect of extrusion to stereoplasm ground, advance the chi with higher speed, but also can further increase the location effect.
Preferably, the outer wall of the inner teeth is conical.
By adopting the technical scheme, the centering effect during footage is ensured.
Preferably, a gap exists between one end of the outer wall of the inner tooth adjacent to the steel body and one end of the inner wall of the outer tooth adjacent to the steel body.
Through adopting above-mentioned technical scheme for the recess also can play the cutting action, thereby is favorable to speeding up the footage.
Preferably, the inner side wall of the inner tooth protrudes out of the circumferential inner side wall of the steel body, and/or the outer side wall of the outer tooth protrudes out of the circumferential outer side wall of the steel body.
Through adopting above-mentioned technical scheme, be favorable to increasing the interval between internal tooth and the concave tooth, and then enlarge the capacity of recess.
Preferably, the internal tooth includes interior changeover portion, the both ends of interior changeover portion respectively with the inside wall of internal tooth with the inside wall fixed connection of the steel body, and/or the external tooth includes outer changeover portion, the both ends of outer changeover portion respectively with the lateral wall of external tooth with the lateral wall of the steel body is connected.
Preferably, a main water path is arranged between the outer teeth and the inner teeth.
By adopting the technical scheme, in the drilling process, the flushing liquid flowing in the main water channel is used for flushing and cleaning the chips on the inner tooth and outer tooth lip surfaces, so that the drilling efficiency is prevented from being influenced after the drill is stuck; and utilize the flush fluid to take away the heat on internal tooth and the external tooth, cool down internal tooth and external tooth, prevent that internal tooth and external tooth are in under the high temperature environment for a long time and shorten life.
Preferably, the main water path extends from the outer side wall of the outer tooth to the inner side wall of the inner tooth, and the main water path is communicated with the inner cavity of the steel body.
Through adopting above-mentioned technical scheme, enlarged the flow in main water route to make things convenient for the flush fluid to wash and cool down the drill bit by the inside entering main water route of the steel body, guarantee drilling efficiency and life.
Preferably, the main waterway is in a through groove shape, and the bottom of the main waterway is positioned between the bottom of the groove and the steel body.
Preferably, by adopting the technical scheme, the flow of the main water path is enlarged, and the flushing and cooling effects on the lip surface of the drill bit are improved; moreover, the main water channel, the internal teeth and the external teeth form a stepped free surface, and after the external teeth are drilled, a certain gap is reserved between the stratum and the bottom of the main water channel, so that the contact area between the external teeth and the stratum is reduced, the drilling pressure is improved, and accelerated drilling is facilitated; in addition, the material consumption required by the production of the drill bit is reduced, and the production cost is further reduced.
Preferably, the main water paths are arranged in a plurality and are uniformly distributed on a circumference which takes the center of the inner teeth as a circle center.
Through adopting above-mentioned technical scheme, increased the quantity in main water route to increase the flux of washing liquid, improved the washing row mud and the cooling effect to the drill bit.
Preferably, the carcass and the steel body are integrally sintered and molded.
Through adopting above-mentioned technical scheme, consolidated the overall structure of drill bit, prolonged the life of drill bit.
In conclusion, the concave tooth drill bit has the advantages that the structure is simplified and the production cost is reduced by arranging the inner teeth and the outer teeth, and the grooves are arranged between the inner teeth and the outer teeth, so that the drilling pressure is increased, the crushing of the stratum is enhanced, and the footage speed is increased; in addition, the inner teeth protruding out of the end part of the outer teeth have a guiding effect after drilling into the stratum, so that the drill bit is prevented from being eccentrically inclined in the drilling process, and the drilling effect is ensured.
Drawings
FIG. 1 is a schematic representation of the configuration of a button bit of the present invention;
FIG. 2 is a schematic representation of the configuration of a button bit of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
FIG. 5 is an enlarged view of portion A of FIG. 1;
FIG. 6 is an enlarged view of portion B of FIG. 3;
in the figure: 1. the water pump comprises a steel body, 2. internal teeth, 2a. an external wall of the internal teeth, 2b. an internal transition section, 3. external teeth, 3a. an internal wall of the external teeth, 3b. an external transition section, 4. a groove and 5. a main water path.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-6, the concave-tooth drill bit of the present invention comprises a cylindrical steel body 1 and a carcass arranged at one end of the steel body 1, wherein the carcass comprises external teeth 3 and internal teeth 2 fixedly connected with the steel body 1, the external teeth 3 and the internal teeth 2 are both annular and coaxial with the steel body 1, and the internal teeth 2 are located at the inner side of the external teeth 3; the internal teeth 2 protrude out of one end, back to the steel body 1, of the external teeth 3, and an annular groove 4 is formed between the external teeth 3 and the internal teeth 2.
Compared with a traditional multi-step drill bit, the concave-tooth drill bit is only provided with two steps of the inner teeth 2 and the outer teeth 3, so that the structure is simplified, the production cost is reduced, meanwhile, the inner teeth 2 protrude out of one end, back to the steel body 1, of the outer teeth 3, in the drilling process, the inner teeth 2 act on a stratum, after a drilled hole is formed in the surface of the stratum, the drilled hole limits the inner teeth 2, the eccentricity in the drilling process is prevented, and therefore a good guiding effect is achieved; in addition, because be provided with recess 4 between internal tooth 2 and the external tooth 3, reduced the lip face size of drill bit on the one hand, consequently under the same drilling pressure, this notch tooth drill bit has bigger drilling specific pressure, strengthens the crushing effect of extrusion to the stratum, promotes the footage speed to make this drill bit be applicable to hard stratum.
As shown in fig. 5 and 6, the groove 4 includes an inner-tooth outer wall 2a provided on the inner tooth 2 and an outer-tooth inner wall 3a provided on the outer tooth 3, the inner-tooth outer wall 2a extends from the groove bottom to the notch toward the inner side of the steel body 1, and the outer-tooth inner wall 3a extends from the groove bottom to the notch toward the outer side of the steel body 1 and is in the shape of a conical surface; a gap exists between one end of the outer wall 2a of the inner teeth adjacent to the steel body 1 and one end of the inner wall 3a of the outer teeth adjacent to the steel body 1.
After adopting above-mentioned structural design, internal tooth outer wall 2a extends to steel body 1's inboard by tank bottom to notch on the one hand, the compressive action face area of internal tooth 2 when having reduced to creep into, it is corresponding, external tooth inner wall 3a extends to steel body 1's the outside by tank bottom to notch, the compressive action face area of external tooth 3 when having reduced to creep into, the lip face area of drill bit has so been reduced, it is corresponding under the same drilling pressure, the drilling pressure increase of drill bit, thereby the crushing effect to the stereoplasm stratum has been strengthened, the rate of footage has been promoted, and on the other hand has further increased positioning effect, in addition, the internal tooth outer wall 2a of the conical surface is favorable to strengthening centering effect.
As shown in fig. 2 and 4, the inner side wall of the inner teeth 2 protrudes out of the circumferential inner side wall of the steel body 1, the inner teeth 2 comprise inner transition sections 2b, and two ends of each inner transition section 2b are fixedly connected with the inner side wall of the inner teeth 2 and the inner side wall of the steel body 1 respectively; the lateral wall protrusion in the circumference lateral wall of the steel body 1 of external tooth 3, external tooth 3 include outer changeover portion 3b, the both ends of outer changeover portion respectively with the lateral wall of external tooth 3 and the lateral wall fixed connection of steel body 1.
After the design is adopted, the groove 4 can also play a cutting role, and the high-speed drilling of the drill bit is facilitated.
As shown in fig. 1, 3, 5 and 6, a plurality of main water channels 5 are arranged between the outer teeth 3 and the inner teeth 2, the main water channels 5 are uniformly distributed on the circumference with the center of the inner teeth 2 as the center of a circle, and the main water channels 5 are in a through groove shape and communicated with the inner cavity of the steel body 1; the groove bottom of the main waterway 5 is positioned between the groove bottom of the groove 4 and the steel body 1.
By designing the plurality of main water paths 5, when drilling is facilitated, flushing fluid is discharged from the inner cavity of the steel body 1 and flows into the main water paths 5 to flush and clean the inner teeth 2 and the outer teeth 3, so that debris impurities such as mud and powder on the lip surface of the drill bit 1 are removed, sticking of the drill bit is prevented to improve drilling efficiency, and after the low-temperature flushing fluid is contacted with the inner teeth 2 and the outer teeth 3, heat of the inner teeth 2 and the outer teeth 3 is absorbed to cool the drill bit, so that the phenomenon that the inner teeth 2 and the outer teeth 3 are in a high-temperature state for a long time and the service life of the drill bit is shortened is avoided; the tank bottom in main water route 5 is located between the tank bottom of recess 4 and the steel body 1 to enlarged main water route 5's volume, and then enlarged the flow of flush fluid, promoted the washing mud of arranging and cooling effect to the drill bit, still reduced the material production quantity of this concave tooth drill bit in addition, thereby reduced the manufacturing cost of this concave tooth drill bit.
The tire body and the steel body 1 are integrally sintered and molded. By adopting the design, the whole structure of the drill bit is reinforced, and the effective service life of the drill bit is ensured.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a concave tooth drill bit, includes the steel body (1) of tube-shape and set up in the matrix of steel body (1) one end, its characterized in that:
the matrix includes annular external tooth (3) and set up in the annular internal tooth (2) of external tooth (3) inboard, internal tooth (2) with the axial lead of external tooth (3) all with the axial lead coincidence of the steel body (1), internal tooth (2) protrusion in external tooth (3) is dorsad the one end of steel body (1), external tooth (3) with be provided with annular recess (4) between internal tooth (2).
2. The button bit of claim 1, wherein: the groove (4) comprises an inner tooth outer wall (2 a) arranged on the inner tooth (2) and an outer tooth inner wall (3 a) arranged on the outer tooth (3); the outer wall (2 a) of the inner teeth extends from the groove bottom to the groove opening to the inner side of the steel body (1), and/or the inner wall (3 a) of the outer teeth extends from the groove bottom to the groove opening to the outer side of the steel body (1).
3. The button bit of claim 2, wherein: and a gap exists between the outer wall (2 a) of the internal tooth and one end adjacent to the steel body (1) and between the inner wall (3 a) of the external tooth and one end adjacent to the steel body (1).
4. The button bit of claim 1, wherein: the inner side wall of the inner teeth (2) protrudes out of the circumferential inner side wall of the steel body (1), and/or the outer side wall of the outer teeth (3) protrudes out of the circumferential outer side wall of the steel body (1).
5. The button bit of claim 4, wherein: internal tooth (2) include interior changeover portion (2 b), the both ends of interior changeover portion (2 b) respectively with the inside wall of internal tooth (2) with the inside wall fixed connection of steel body (1), and/or external tooth (3) include outer changeover portion (3 b), the both ends of outer changeover portion (3 b) respectively with the lateral wall of external tooth (3) with the lateral wall of steel body (1) is connected.
6. The button bit of claim 1, wherein: a main water channel (5) is arranged between the outer teeth (3) and the inner teeth (2).
7. The button bit of claim 6, wherein: the main waterway (5) is extended to the inner side wall of the inner tooth (2) from the outer side wall of the outer tooth (3), and the main waterway (5) is communicated with the inner cavity of the steel body (1).
8. The button bit of claim 7, wherein: the main water channel (5) is in a through groove shape, and the bottom of the main water channel (5) is located between the bottom of the groove (4) and the steel body (1).
9. The button bit of claim 6, wherein: the main water channels (5) are arranged in a plurality and are uniformly distributed on the circumference which takes the center of the internal teeth (2) as the circle center.
10. The button bit of claim 1, wherein: the tire body and the steel body (1) are integrally sintered and molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122418729.9U CN215979216U (en) | 2021-10-08 | 2021-10-08 | Concave tooth drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122418729.9U CN215979216U (en) | 2021-10-08 | 2021-10-08 | Concave tooth drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215979216U true CN215979216U (en) | 2022-03-08 |
Family
ID=80570605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122418729.9U Active CN215979216U (en) | 2021-10-08 | 2021-10-08 | Concave tooth drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215979216U (en) |
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2021
- 2021-10-08 CN CN202122418729.9U patent/CN215979216U/en active Active
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