CN221144306U - Multi-tooth-shaped roller cone and roller bit - Google Patents
Multi-tooth-shaped roller cone and roller bit Download PDFInfo
- Publication number
- CN221144306U CN221144306U CN202322562272.8U CN202322562272U CN221144306U CN 221144306 U CN221144306 U CN 221144306U CN 202322562272 U CN202322562272 U CN 202322562272U CN 221144306 U CN221144306 U CN 221144306U
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- 230000036346 tooth eruption Effects 0.000 claims description 8
- 239000011435 rock Substances 0.000 abstract description 13
- 238000005553 drilling Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a multi-tooth cone and a cone bit, wherein the multi-tooth cone is of a conical structure, an inner tooth row, a plurality of rows of main cutting tooth rows and an outer tooth row are sequentially arranged from a pointed cone end to the bottom of the multi-tooth cone, each main cutting tooth row comprises a plurality of first tooth teeth and second tooth teeth which are alternately distributed along the circumferential direction of the multi-tooth cone, the heights of the first tooth teeth and the second tooth teeth exposed out of the surfaces of the multi-tooth cone are different, and the intervals between the first tooth teeth and the second tooth teeth on two sides of the first tooth teeth are different; the external gear row includes a plurality of third teeth and fourth teeth alternately arranged along a circumferential direction of the multi-tooth gear. The utility model can strengthen the impact of the drill bit on the stratum and improve the rock breaking efficiency of the drill bit in the hard stratum.
Description
Technical Field
The utility model relates to the technical field of roller bit. More particularly, the present utility model relates to a multi-tooth cone and a roller cone drill bit.
Background
The cone bit is a bit for stratum rock drilling, mainly composed of cone and bit body, in which the bit body is formed from several bit legs by means of assembling and welding, its upper end is equipped with screw thread, and is connected with the tool of drill collar or screw drilling tool, and its lower end is equipped with shaft neck which is formed into a certain angle with centre line of bit body, and the cone has an inner hole matched with shaft neck, and is sleeved on the shaft neck. The gear is cone-shaped, a certain number of teeth are embedded on the cone, the row of teeth close to the bottom of the cone is an outer row of teeth, the row of teeth close to the cone top is an inner row of teeth, and a plurality of rows of main cutting teeth are arranged between the outer row of teeth and the inner row of teeth. In the drilling process, the rotary drill, the rotary table or the screw drilling tool drives the rotary drill bit to rotate, the teeth of the tooth eat into the ground, and rotates around the axle journal of the bit body to break the rock by impacting, crushing, sliding and the like, thereby forming a borehole. In hard and brittle formations, bit weight is required to bring the forces of the teeth on the formation above the threshold for rock breaking. Under the condition of a certain rotating speed, the bit pressure is smaller, the drill bit can not penetrate into the stratum, and the drill bit can be quickly worn; the greater weight on bit can easily lead to tooth breakage or bearing failure. Teeth with the same tooth shape, tooth diameter and exposed height are inlaid on each tooth row of the existing cone, the operation is stable in the working process, the service life is longer, but the impact on stratum is smaller, and the mechanical drilling rate of the hard and brittle stratum is lower; the applied bit pressure is larger, and the main cutting teeth are easy to break; the external gear is used for simultaneously cutting the bottom hole and the well wall, is complex in stress and is easy to damage.
Disclosure of utility model
It is an object of the present utility model to solve at least the above problems and to provide at least the advantages to be described later.
To achieve these objects and other advantages and in accordance with the purpose of the utility model, there is provided a multi-tooth cone having a conical structure in which an inner tooth row, a plurality of main cutting tooth rows including a plurality of first teeth and second teeth alternately arranged in a circumferential direction of the multi-tooth cone, the first teeth and the second teeth being different in height from which surfaces of the multi-tooth cone are exposed, and an outer tooth row being sequentially provided from a pointed cone end to a bottom, the first teeth and the second teeth being different in spacing from each other; the external gear row includes a plurality of third teeth and fourth teeth alternately arranged along a circumferential direction of the multi-tooth gear.
Preferably, the first tooth is a cone button and the second tooth is a ball button.
Preferably, the first tooth is a cone button and the second tooth is a wedge button.
Preferably, the first teeth have a height that exposes the multi-tooth cone surface that is greater than a height that exposes the multi-tooth cone surface of the second teeth.
Preferably, the height of the first tooth exposed to the surface of the multi-tooth cone is 0.5-1.5 mm higher than the height of the second tooth exposed to the surface of the multi-tooth cone.
Preferably, the distance between the first tooth and the second tooth on the front side is smaller than the distance between the first tooth and the second tooth on the rear side in the rotation direction of the multi-tooth cone.
Preferably, the crest radius of the cone buttons is smaller than the radius of the buttons.
Preferably, the third tooth is a spherical tooth and the fourth tooth is a tapered wedge tooth.
Preferably, the third tooth is a side wedge tooth, and the fourth tooth is a taper wedge tooth.
It is a further object of the present utility model to provide a roller cone drill bit comprising one or more multi-tooth cones as described above.
The utility model at least comprises the following beneficial effects:
according to the multi-tooth-shaped roller cone, the mixing of different rock breaking modes is realized by arranging the tooth teeth with different tooth shapes in the main cutting tooth row and the outer tooth row; the teeth with different exposure heights are arranged in the same main cutting tooth row, so that the impact of the drill bit on the stratum can be further enhanced, and the rock breaking efficiency of the drill bit in the hard stratum is improved.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
FIG. 1 is a schematic side view of a multi-tooth cone according to the present utility model, wherein the first teeth are taylor teeth and the second teeth are taylor teeth;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a top view of the multi-tooth cone of the present utility model with the first tooth being a cone and the second tooth being a wedge;
FIG. 4 is a schematic high level view of the first and second teeth exposing the multi-tooth cone surface in accordance with the present utility model;
FIG. 5 is a schematic side view of the multi-tooth cone of the present utility model with the third tooth being a spherical tooth and the fourth tooth being a tapered wedge tooth;
FIG. 6 is a schematic side view of the multi-tooth cone of the present utility model with the third tooth being a side wedge and the fourth tooth being a cone wedge;
Detailed Description
The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present utility model, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.
As shown in fig. 1, the present utility model provides a multi-tooth cone 100 having a conical structure, and an inner tooth row 10, a plurality of rows of main cutting teeth 20, and an outer tooth row 30 are sequentially disposed from a pointed cone end to a bottom, the main cutting teeth row 20 includes a plurality of first teeth 21 and second teeth 22 alternately disposed along a circumferential direction of the multi-tooth cone 100, heights of surfaces of the first teeth 21 and the second teeth 22 exposed to the multi-tooth cone 100 are different, and pitches between any first teeth 21 and the second teeth 22 on both sides thereof are different; the outer gear row 30 includes a plurality of third teeth 31 and fourth teeth 32 alternately arranged along the circumference of the multi-tooth cone 100.
In the above technical solution, by arranging the teeth with different tooth shapes in the main cutting tooth row 20 and the outer tooth row 30, the mixing of different rock breaking modes is realized; the arrangement of the teeth with different exposure in the same main cutting teeth row 20 can further enhance the impact of the drill bit on the stratum, thereby improving the rock breaking efficiency of the drill bit in the hard stratum.
In another embodiment, as shown in fig. 2, the first tooth 21 is a cone gear 211, and the second tooth 22 is a ball gear 221.
In another embodiment, as shown in fig. 3, the first tooth 21 is a cone gear 211, and the second tooth 22 is a wedge gear 222.
Further, as shown in FIG. 4, the height h 1 of the first teeth 21 exposing the multi-tooth cone surface is greater than the height h 2 of the second teeth 22 exposing the multi-tooth cone surface.
Specifically, the height h 1 of the first tooth 21 exposing the surface of the multi-tooth cone 100 is 0.5-1.5 mm higher than the height h 2 of the second tooth 22 exposing the surface of the multi-tooth cone 100.
In the main cutting teeth row 20, the contact stress between the teeth and the stratum can be increased by adopting the cone buttons 211, and the rock can be broken under the condition of smaller bit pressure; the spherical teeth 221 or the wedge-shaped teeth 222 with different exposed tooth heights are adopted, so that the impact of the drill bit on the stratum can be increased, and the rock breaking efficiency is improved.
In another aspect, as shown in fig. 1, a distance L1 between the first tooth 21 and the second tooth 22 on the front side is smaller than a distance L2 between the first tooth and the second tooth 22 on the rear side along the rotation direction of the multi-tooth cone 100, so as to reduce the difficulty of breaking the cone buttons 211 and enhance the impact of the ball buttons 221.
Further, the crest radius R1 of the cone button 211 is smaller than the radius R2 of the button 221 to highlight the ability of the cone button 211 to eat into the earth and the impact surface of the button 221.
In another embodiment, as shown in fig. 5, the third tooth 31 is a spherical tooth 311, and the fourth tooth 32 is a tapered tooth 321.
In another embodiment, as shown in fig. 6, the third tooth 31 is a wedge tooth 312, and the fourth tooth is a wedge tooth 321.
The conical wedge teeth 321 are adopted in the outer gear 30 to break down the rock at the bottom of the well, and the spherical teeth 311 or the side wedge teeth 312 are adopted to scrape the well wall.
The utility model also provides a roller cone drill bit comprising one or more of any of the multi-tooth roller cones described above. By improving the tooth arrangement mode of the cone on the cone bit, the rock breaking efficiency of the bit can be improved, and meanwhile, the working weight of the bit is reduced, so that the rock breaking specific work or energy consumption of the bit is reduced, the bearing stress on the shaft neck is also reduced, and the early failure of the bearing can be avoided.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. The multi-tooth cone is of a conical structure, and an inner tooth row, a plurality of rows of main cutting teeth and an outer tooth row are sequentially arranged from a pointed cone end to the bottom of the multi-tooth cone, and the multi-tooth cone is characterized in that the main cutting teeth row comprises a plurality of first teeth and second teeth which are alternately distributed along the circumferential direction of the multi-tooth cone, the heights of the first teeth and the second teeth exposed out of the surface of the multi-tooth cone are different, and the intervals between the first teeth and the second teeth on two sides of the first teeth are different; the external gear row includes a plurality of third teeth and fourth teeth alternately arranged along a circumferential direction of the multi-tooth gear.
2. The multi-tooth cone of claim 1 wherein the first teeth are cone buttons and the second teeth are spherical buttons.
3. The multi-tooth cone of claim 1 wherein the first teeth are cone buttons and the second teeth are wedge buttons.
4. The multi-tooth cone of claim 2 wherein the first teeth have a height that exposes the multi-tooth cone surface that is greater than the height that the second teeth have exposed the multi-tooth cone surface.
5. The multi-tooth cone of claim 4, wherein the height of the first tooth exposed to the multi-tooth cone surface is 0.5-1.5 mm greater than the height of the second tooth exposed to the multi-tooth cone surface.
6. The multi-tooth cone of claim 2 wherein the distance between the first tooth and the second tooth on the front side is less than the distance between the first tooth and the second tooth on the rear side in the direction of rotation of the multi-tooth cone.
7. The multi-tooth cone of claim 6, wherein the crest radius of the cone buttons is less than the radius of the buttons.
8. The multi-tooth cone of claim 1 wherein the third teeth are spherical teeth and the fourth teeth are tapered wedge teeth.
9. The multi-tooth cone of claim 1 wherein the third tooth is a side wedge and the fourth tooth is a cone wedge.
10. A roller cone drill bit comprising one or more multi-tooth cones according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322562272.8U CN221144306U (en) | 2023-09-21 | 2023-09-21 | Multi-tooth-shaped roller cone and roller bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322562272.8U CN221144306U (en) | 2023-09-21 | 2023-09-21 | Multi-tooth-shaped roller cone and roller bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221144306U true CN221144306U (en) | 2024-06-14 |
Family
ID=91418225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322562272.8U Active CN221144306U (en) | 2023-09-21 | 2023-09-21 | Multi-tooth-shaped roller cone and roller bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221144306U (en) |
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2023
- 2023-09-21 CN CN202322562272.8U patent/CN221144306U/en active Active
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