CN109763774A - PDC drill bit and its cutting tooth - Google Patents
PDC drill bit and its cutting tooth Download PDFInfo
- Publication number
- CN109763774A CN109763774A CN201910217163.8A CN201910217163A CN109763774A CN 109763774 A CN109763774 A CN 109763774A CN 201910217163 A CN201910217163 A CN 201910217163A CN 109763774 A CN109763774 A CN 109763774A
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- Prior art keywords
- cutting tooth
- cutting
- drill bit
- protruding portion
- straight line
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Abstract
The present invention discloses a kind of PDC drill bit and its cutting tooth, cutting tooth includes cutting tooth ontology, with center line, multiple protruding portion is circumferentially arranged at the top of cutting tooth ontology, cutting tooth ontology is covering protruding portion perpendicular to the projection on centerline direction perpendicular to the projection on centerline direction, and wherein the top surface of protruding portion protrudes from the top surface of cutting tooth ontology.In use, which can have preferable acuteness, and broken rock is carried out in rock stratum to be easier to enter.Further, the function of having preferably buffering cutting-impact power due to being located at the cutting tooth ontology at protruding portion rear, to make to be more prone to produce rotating friction force in cutting process, so as to improve the broken rock intensity and service life of cutting tooth.
Description
Technical field
The present invention relates to a kind of petroleum drilling technologies, in particular to a kind of cutting tooth.The invention further relates to one kind
PDC drill bit.
Background technique
The PDC drill bit of traditional oil drilling, used in diamond compact be generally rotating cylindrical tooth, surface
For the plane formula flank of tooth.The PDC drill bit of this structure be oil exploitation drilling engineering contribute, but its exist simultaneously it is as follows
The shortcomings that or deficiency: 1. when drilling through compared with hard formation, dimond synneusis layer fast heating calcination generates the abrasion to crumble, finally
Reduce bit life；2., when designing PDC drill bit, generalling use increasing cutting since to absorb impact power small for rotating cylindrical tooth
The way at inclination angle of the tooth on design normal, to reduce the impact dynamics of tooth, but this way brings broken rock intensity to reduce simultaneously
Defect.
Above- mentioned information are only used for reinforcing the understanding to background of the invention disclosed in the background technology part.
Summary of the invention
A primary object of the present invention is to overcome at least one defect of the above-mentioned prior art, provides a kind of cutting
Tooth, to improve broken rock intensity.
Another main purpose of the invention is to overcome at least one defect of the above-mentioned prior art, provides a kind of PDC
Drill bit, to improve broken rock intensity.
For achieving the above object, the present invention adopts the following technical scheme:
According to an aspect of the invention, there is provided a kind of cutting tooth, including cutting tooth ontology, there is center line, it is described
Multiple protruding portion is circumferentially arranged at the top of cutting tooth ontology, and the cutting tooth ontology is perpendicular to the projection on centerline direction
The protruding portion is covered perpendicular to the projection on the centerline direction, wherein the top surface of the protruding portion protrudes from described cut
Cut the top surface of tooth ontology.
A specific embodiment according to the present invention, wherein the cutting tooth further includes pedestal, the cutting tooth ontology can
It is rotatably provided on the pedestal.
A specific embodiment according to the present invention, wherein the protruding portion is the part of cylindrical body, the cylindrical body
Central axis and the centerline parallel；And/or the protruding portion is the part of Elliptic Cylinder, in the Elliptic Cylinder
Mandrel line and the centerline parallel.
A specific embodiment according to the present invention, wherein the protruding portion is not less than along the size of the centerline direction
1mm。
A specific embodiment according to the present invention, wherein the quantity of the protruding portion is at least 6, multiple protrusions
Portion is evenly arranged.
According to another aspect of the present invention, a kind of PDC drill bit is provided, the PDC drill bit includes drill body, cutting wing
And cutting tooth；Drill body has drill bit；The bite wing is formed in the drill bit, is arranged on the cutting wing
There is perforation；Cutting tooth is set in the perforation, the cutting tooth cutting tooth provided by the invention.
A specific embodiment according to the present invention, wherein the PDC drill bit further includes sink, the sink is set to phase
Between the adjacent cutting wing, nozzle is provided in the sink, the nozzle is connected to water source.
A specific embodiment according to the present invention, wherein the PDC drill bit further includes protection tooth and gauge teeth, the guarantor
Diameter tooth is set to the outer peripheral surface of the bizet of the drill body, the protection tooth be set to the cutting tooth and the gauge teeth it
Between.
A specific embodiment according to the present invention, wherein the top surface of the gauge teeth is semi-cylindrical structure or semicircle
Planar structure.
A specific embodiment according to the present invention, wherein the bite wing includes first straight line section, second straight line section
And arc section；The first straight line section leans on entad to edge diagonally upper direction extension from the bizet, described
First straight line section has tail end, and the tail end is close to the edge；The second straight line section from the top surface of the bizet to
The bottom surface of the bizet extends, the centerline parallel of the second straight line section and the cutting tooth ontology, the second straight line section
With head end, the head end is close to the top surface；The arc section is set to the tail end of the first straight line section and described
Between the head end of second straight line section, the arc section is protruded outward, the first straight line section and the cutting tooth ontology
The angle of bottom surface is 0 ° -45 °.
As shown from the above technical solution, it PDC drill bit of the invention and its advantages of cutting tooth and has the active effect that
Cutting tooth provided by the invention has protruding portion, and in use, which can have preferable sharp
Property, broken rock is carried out in rock stratum to be easier to enter.Further, since the cutting tooth ontology for being located at protruding portion rear has
The preferably function of buffering cutting-impact power, to make to be more prone to produce rotating friction force in cutting process, so as to improve
The broken rock intensity and service life of cutting tooth.
Detailed description of the invention
Consider following the following detailed description of the embodiment of the present invention in conjunction with the accompanying drawings, various targets of the invention,
Feature and advantage will become apparent.Attached drawing is only exemplary diagram of the invention, is not necessarily drawn to scale.
In the accompanying drawings, same appended drawing reference always shows same or similar component.Wherein:
Fig. 1 is a kind of main view of cutting tooth shown according to an illustrative embodiments.
Fig. 2 is the main view of the cutting tooth ontology of the cutting tooth in Fig. 1.
Fig. 3 is the longitudinal sectional view of the pedestal in Fig. 1.
Fig. 4 is the top view of the pedestal in Fig. 1.
Fig. 5 is the top view of the cutting tooth in Fig. 1.
Fig. 6 is a kind of main view of PDC drill bit shown according to an illustrative embodiments.
Fig. 7 is the top view of the PDC drill bit in Fig. 6.
Fig. 8 is the cross-sectional view of the PDC drill bit in Fig. 6.
Fig. 9 is the side drift angle of the cutting tooth of the PDC drill bit in Fig. 1.
Figure 10 is the negative rake of the cutting tooth of the PDC drill bit in Fig. 1.
Wherein, the reference numerals are as follows:
1, drill body；2, cutting tooth；
21, cutting tooth ontology；22, pedestal；
23, protruding portion；3, tooth is protected；
4, gauge teeth；5, wing is cut；
6, nozzle；γ, side drift angle；
β, negative rake；Angle；
24, jump-ring slot.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus the detailed description that will omit them.
Fig. 1 is a kind of main view of cutting tooth shown according to an illustrative embodiments.Fig. 2 is the cutting tooth in Fig. 1
Cutting tooth ontology main view.Fig. 3 is the longitudinal sectional view of the pedestal in Fig. 1.
Fig. 4 is the top view of the pedestal in Fig. 1.Fig. 5 is the top view of the cutting tooth in Fig. 1.
Referring to figs. 1 to Fig. 5, according to an aspect of the invention, there is provided a kind of cutting tooth 2, the cutting tooth 2 may include
Cutting tooth ontology 21, the cutting tooth ontology 21 can have center line, and the top of the cutting tooth ontology 21 can be circumferentially
There is multiple protruding portion 23, to be formed as petal-shaped drill bit structure.In use, which can have preferable point
Sharp property carries out broken rock to be easier to enter in rock stratum.Further, due to the cutting tooth sheet positioned at 23 rear of protruding portion
Body 21 can have the function of preferably buffering cutting-impact power, so as to so as to be more prone to produce spin friction in cutting process
Power, and then the broken rock intensity and service life of cutting tooth 2 can be improved.
A specific embodiment according to the present invention, wherein cutting tooth 2 can be petal type diamond compact structure.
With continued reference to Fig. 1 to Fig. 5, a specific embodiment according to the present invention, wherein the cutting tooth ontology 21 is hanging down
Directly the protruding portion 23 can be covered perpendicular to the projection on the centerline direction in the projection on centerline direction, it can be with
Understand, protruding portion 23 can be protruded outward by the top surface of cutting tooth ontology 21 and be formed.A specific implementation according to the present invention
Mode, wherein the top surface of the protruding portion 23 can protrude from the top surface of the cutting tooth ontology 21.
A specific embodiment according to the present invention, wherein protruding portion 23 can be in conical cylinder structure, the conical cylinder
The central axis of structure can be arranged with the centerline parallel of cutting tooth ontology 21；The trigone in addition, protruding portion 23 can also be positive
The bottom surface of cone structure, the trigone cone structure can be fixedly connected on the top surface of cutting tooth ontology 21；Certainly, the protruding portion
23 can also be hexahedron structure etc., all within the scope of the present invention.With continued reference to Fig. 1 to Fig. 5, according to the present invention one
Specific embodiment, wherein the protruding portion 23 can be the part of cylindrical body, the central axis of the cylindrical body can be with institute
State centerline parallel, protruding portion 23 can for 1/2 cylindrical body or 1/3 cylindrical body or 1/5 cylindrical body etc. all at this
In the protection scope of invention；And/or the part of the protruding portion 23 or Elliptic Cylinder, in the Elliptic Cylinder
Mandrel line and the centerline parallel, wherein protruding portion 23 can be 1/2 Elliptic Cylinder or 1/3 Elliptic Cylinder or 1/
5 Elliptic Cylinders etc. are all within the scope of the present invention.
It is, of course, understood that in the case that protruding portion 23 is part cylindrical structure, the central axis of the cylindrical body
It can also be perpendicular to the center line of cutting tooth ontology 21；In the case where protruding portion 23 is part elliptical cone structure, the ellipse
Cylinder volume central axis can be with the center line of vertical cut tooth ontology 21, all within the scope of the present invention.Such as it is but unlimited
In, in its dimond synneusis layer outer circle, can rule distribution multiple protruding portion 23.The protruding portion 23 can be with dimond synneusis
Level is divided into upper layer and lower layer, wherein having the plycrystalline diamond layer of protruding portion 23, excircle dimension can be less than or equal to below without prominent
The plycrystalline diamond layer in portion 23 out.
Cutting tooth 2 can be fixedly installed on cutting wing, can also be rotationally arranged on cutting wing, such as but
It is not limited to, with continued reference to Fig. 1 to Fig. 5, a specific embodiment according to the present invention, wherein the cutting tooth 2 can also include
Pedestal 22, the cutting tooth ontology 21 are rotationally arranged on the pedestal 22, and pedestal 22 can be fixedly installed on bite
On the wing.Specifically, pedestal 22 can be set to tubular construction, and cutting tooth ontology 21 can be set to stepped shaft structure, the ladder
The small end of axis can protrude into tubular construction, and be rotatablely arranged in tubular construction, can be such as, but not limited to the two
It can be connected for bearing, all within the scope of the present invention.A specific embodiment according to the present invention, wherein multi-diameter shaft
Jump-ring slot 24 has can be set in the end of small end, can cooperate with circlip cutting tooth ontology 21 to be arranged in pedestal 22.
A specific embodiment according to the present invention, wherein the protruding portion 23 can be with along the size of the centerline direction
Not less than 1mm.A specific embodiment according to the present invention, wherein the quantity of the protruding portion 23 is at least 6, Duo Gesuo
Stating protruding portion 23 can be evenly arranged.It is understood that multiple protruding portion 23 can have the same shape, can also have respectively
There is different shape, can be set according to actual needs, all within the scope of the present invention.
A kind of PDC drill bit is provided according to another aspect of the present invention referring to Fig. 6 to Figure 10, which may include
Drill body 1, cutting wing 5 and cutting tooth 2.Drill body 1 can have drill bit, and cutting wing 5 can be formed in
Perforation has can be set on the cutting wing 5 in the drill bit, and cutting tooth 2 can be set in the perforation.According to this
Invention a specific embodiment, cutting tooth 2 provided by the invention can based on cutting tooth, can be set in cutting wing 5 push up
In the perforation in portion, all within the scope of the present invention.
Amount of heat can be generated during PDC drill bit work, in order to avoid the amount of heat is to the longevity of PDC drill bit
Life impacts, a specific embodiment according to the present invention, wherein the PDC drill bit can also include sink, the sink
It can be set between the adjacent cutting wing 5, nozzle 6 can be set in the sink, the nozzle 6 can be with water
Source connection.It is understood that nozzle 6 can be connected to by conduit with water source, it can also be in the drill body 1 of the PDC drill bit
Interior setting water cavity, nozzle 6 are connected to the water cavity.The quantity of nozzle 6 can be with the working environment of PDC drill bit and PDC drill bit
Rotation speed is related, can according to need arbitrarily selected, and such as, but not limited to nozzle 6 can have 4-18.
The structure of drill body 1 can be Elliptic Cylinder, square cylinder or other skilled in the art it is conceivable that
Column body structure is all within the scope of the present invention, according to the present invention a kind of specific embodiment, and what is provided is tubular
Drill body 1, the diameter of the drill bit ontology 1 may be selected to be 127mm to 431.8mm.
A specific embodiment according to the present invention, wherein the PDC drill bit can also include protection tooth 3 and gauge teeth
4, the gauge teeth 4 is set to the outer peripheral surface of the bizet of the drill body, and the protection tooth 3 is set to the cutting tooth and institute
It states between gauge teeth 4.Gauge teeth 4 can be set on the outer peripheral surface of the bizet of drill body 1, which can be used for protecting
The outer peripheral surface of shield bizet is worn with preventing from being in contact with rock stratum.Gauge teeth 4 can have those skilled in the art can
The structure type expected, such as, but not limited to semi-cylindrical structure or semicircular planform structure.Protection tooth 3 can be installed on each
It cuts below the main cutting tooth of bottom one of wing 5, gauge teeth 4 can be installed on bite underwing.
PDC drill bit can also include cutting wing 5, and cutting wing 5 can be from the top surface of the bizet of drill body 1 to drill bit
The outer peripheral surface of the bizet of ontology 1 extends, and main cutting tooth 2 and gauge teeth 4 are respectively arranged on cutting wing 5.Cutting wing 5 can be with
With 3 to 8, there are 5 cutting wings 5 in an embodiment provided by the invention.Main cutting tooth 2 on each cutting wing 5
Quantity can according to need and be configured, can be at least provided with 3 main cuttings on such as, but not limited to each cutting wing 5
Tooth 2.
The setting direction and setting angle of cutting tooth 2With the cutting direction of PDC drill bit and the cutting of PDC drill bit
Angle is related, and referring to Fig. 9 and Figure 10, as one embodiment of the present invention, wherein cutting tooth 2 has side on cutting wing 5
Drift angle γ or negative rake β, the range of side drift angle γ or negative rake β are as follows: 0 ° of γ≤20 ° <, 0 ° of β≤20 ° <.It is understood that
It is that one embodiment provided by the invention is that the bottom surface of the cutting tooth ontology 21 of cutting tooth 2 can be set in drill body 1.
PDC drill bit of the invention, with the range of side drift angle γ or negative rake β are as follows: 0 ° of γ≤20 ° <, 0 ° of β≤20 ° <
Mode is arranged, to make the rock stratum being cut by biggish local pressure, carg is larger, so that more conducively water flow is clear
It washes.
A specific embodiment according to the present invention, wherein the top surface of the gauge teeth 4 is semi-cylindrical structure or semicircle
Shape planar structure.
A specific embodiment according to the present invention, wherein the bite wing includes first straight line section, second straight line section
And arc section；The first straight line section leans on entad to edge diagonally upper direction extension from the bizet, described
First straight line section has tail end, and the tail end is close to the edge；The second straight line section from the top surface of the bizet to
The bottom surface of the bizet extends, the centerline parallel of the second straight line section and the cutting tooth ontology, the second straight line section
With head end, the head end is close to the top surface；The arc section is set to the tail end of the first straight line section and described
Between the head end of second straight line section, the arc section is protruded outward, the first straight line section and the cutting tooth ontology
The angle of bottom surfaceIt is 0 ° -45 °.
From bizet by entad to the edge first straight line section that diagonally upper direction extends, the first straight line section with
The angle of the bottom surface of cutting tooth ontology 21Range is 0 ° to 45 °, and first straight line section has the tail end by proximal edge；From bizet
The second straight line section that top surface extends to the bottom of bizet, it can understanding, second straight line section is from the top surface of bizet to downward
It stretches, the centerline axis parallel of second straight line section and cutting tooth ontology 21, second straight line section has head end, and head end is close to top surface；If
The arc section being placed between the tail end of first straight line section and the head end of second straight line section, arc section protrude outward.The half of arc section
Diameter can be the arbitrary dimension of needs, and such as, but not limited to radius is 0mm to the arbitrary value between 90mm.
3 main cutting teeth are at least installed on the cutting wing 5, the diameter phi 2 of main cutting tooth can be 10-25mm,
Total high h2 can be 5-20mm, and step height h1 can be 3-18mm.
The present invention has the advantages that compared with prior art
1, rock bottom is more easily cut using the acuteness of protruding portion, so as to improve efficiency of breaking rock；
2, the subsequent diamond circle level of its protruding portion can have buffering cutting-impact power, to make in cutting process more
It is easy to produce rotating friction force, so as to improve the broken rock intensity and service life of cutting tooth.
Described feature, structure or characteristic can be incorporated in one or more embodiments in any suitable manner
In.In the above description, many details are provided to provide and fully understand to embodiments of the present invention.However,
It will be appreciated by persons skilled in the art that technical solution of the present invention can be practiced without one in the specific detail or more
It is more, or can be using other methods, component, material etc..In other cases, be not shown in detail or describe known features,
Material or operation are to avoid fuzzy each aspect of the present invention.
Claims (10)
1. a kind of cutting tooth, which is characterized in that including cutting tooth ontology, there is center line, the top week of the cutting tooth ontology
To multiple protruding portion is disposed with, the cutting tooth ontology is covering the protruding portion vertical perpendicular to the projection on centerline direction
Directly in the projection on the centerline direction, wherein the top surface of the protruding portion protrudes from the top surface of the cutting tooth ontology.
2. cutting tooth as described in claim 1, which is characterized in that the cutting tooth further includes pedestal, the cutting tooth ontology
It is rotationally arranged on the pedestal.
3. cutting tooth as described in claim 1, which is characterized in that the protruding portion is the part of cylindrical body, the cylindrical body
Central axis and the centerline parallel；And/or the protruding portion is the part of Elliptic Cylinder, the Elliptic Cylinder
Central axis and the centerline parallel.
4. cutting tooth as described in claim 1, which is characterized in that the protruding portion is not small along the size of the centerline direction
In 1mm.
5. cutting tooth according to any one of claims 1 to 4, which is characterized in that the quantity of the protruding portion is at least 6
A, multiple protruding portions are evenly arranged.
6. a kind of PDC drill bit characterized by comprising
Drill body has drill bit；
Wing is cut, the drill bit is formed in, is provided with perforation on the cutting wing；
Cutting tooth is set in the perforation, and the cutting tooth is the cutting tooth according to any one of claims 1 to 5.
7. PDC drill bit as claimed in claim 6, which is characterized in that the PDC drill bit further includes sink, the sink setting
Between the adjacent cutting wing, nozzle is provided in the sink, the nozzle is connected to water source.
8. PDC drill bit as claimed in claim 6, which is characterized in that the PDC drill bit further includes protection tooth and gauge teeth, institute
The outer peripheral surface that gauge teeth is set to the bizet of the drill body is stated, the protection tooth is set to the cutting tooth and the gauge
Between tooth.
9. PDC drill bit as claimed in claim 8, which is characterized in that the top surface of the gauge teeth is semi-cylindrical structure or half
Circular flat structure.
10. PDC drill bit as claimed in claim 6, which is characterized in that the cutting wing includes:
First straight line section, the first straight line section diagonally go up direction extension to edge by entad from the bizet,
The first straight line section has tail end, and the tail end is close to the edge；
Second straight line section, the second straight line section extend from the top surface of the bizet to the bottom surface of the bizet, and described the
The centerline parallel of two straightways and the cutting tooth ontology, the second straight line section have head end, and the head end is close to described
Top surface；
Arc section, the arc section are set to the tail end of the first straight line section and the head end of the second straight line section
Between, the arc section protrudes outward, and the angle of the bottom surface of the first straight line section and the cutting tooth ontology is 0 ° -45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910217163.8A CN109763774A (en) | 2019-03-21 | 2019-03-21 | PDC drill bit and its cutting tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910217163.8A CN109763774A (en) | 2019-03-21 | 2019-03-21 | PDC drill bit and its cutting tooth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109763774A true CN109763774A (en) | 2019-05-17 |
Family
ID=66458609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910217163.8A Pending CN109763774A (en) | 2019-03-21 | 2019-03-21 | PDC drill bit and its cutting tooth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109763774A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113326591A (en) * | 2021-08-03 | 2021-08-31 | 西南石油大学 | Drill bit design method based on dynamic rock breaking energy balance adaptation principle |
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| US20040163851A1 (en) * | 2003-02-21 | 2004-08-26 | Smith International, Inc. | Drill bit cutter element having multiple cusps |
| GB2420806B (en) * | 2003-06-03 | 2007-08-29 | Smith International | Cutting element with improved cutting element interface design and bits incorporating the same |
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| CN113326591A (en) * | 2021-08-03 | 2021-08-31 | 西南石油大学 | Drill bit design method based on dynamic rock breaking energy balance adaptation principle |
| CN113326591B (en) * | 2021-08-03 | 2021-10-08 | 西南石油大学 | Drill bit design method based on dynamic rock breaking energy balance adaptation principle |
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Inventor after: Qiu Zhiguo Inventor after: Wang Kexing Inventor before: Wang Kexing Inventor before: Qiu Zhiguo |
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Effective date of registration: 20190912 Address after: 261400 No.1 Building, Meiyuan New Village, Wenfeng Road Street, Laizhou City, Yantai City, Shandong Province Applicant after: Laizhou Jinye Diamond Products Co., Ltd. Address before: 261400 No.1 Building, Caojiacun, Wenfeng Street, Laizhou City, Yantai City, Shandong Province Applicant before: LAIZHOU YUANYE SCIENCE AND TECHNOLOGY CO., LTD. |
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