CN106401484A - Composite drill bit provided with rotary teeth - Google Patents
Composite drill bit provided with rotary teeth Download PDFInfo
- Publication number
- CN106401484A CN106401484A CN201611049383.7A CN201611049383A CN106401484A CN 106401484 A CN106401484 A CN 106401484A CN 201611049383 A CN201611049383 A CN 201611049383A CN 106401484 A CN106401484 A CN 106401484A
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- CN
- China
- Prior art keywords
- rotary teeth
- tooth
- rotary
- cutting
- teeth
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
- E21B10/20—Roller bits characterised by detachable or adjustable parts, e.g. legs or axles
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
Abstract
The invention discloses a composite drill bit provided with rotary teeth. The composite drill bit comprises a drill bit body, a fixed cutting structure and roller cones. The fixed cutting structure is provided with fixed cutting teeth; the roller cones are in rotary connection with the drill bit body and can rotate relative to the drill bit body; the drill bit body is provided with at least one roller cone; at least one cutting tooth on each roller cone is the rotary tooth which is in rotary connection with the roller cone; the front cutting face of each rotary tooth or the geometric center of the front cutting face of the rotary tooth deviates relative to the rotary axis of the rotary tooth; the rear cutting face of each rotary tooth or the geometric center of the rear cutting face is in deviation direction of the front cutting face; and the front cutting face is close to the rotary axis of each rotary tooth relative to the rear cutting face and can rotate on the corresponding roller cone around the axis. According to the composite drill bit, the problem that in the prior art, composite teeth (such as PDC teeth) cannot be adopted on a roller cone is solved, and when cutting teeth (such as hard alloy teeth) which are the same with those in the prior art are adopted, abrasion of the cutting teeth is reduced, and the abrasion and passivation speeds of the cutting teeth are low.
Description
Technical field
The invention belongs to the drilling equipment skill such as the construction of petroleum gas, mine engineering, building foundation engineering, geology, hydrology
Art field, more particularly, to a kind of composite drill bit.
Background technology
Drill bit is the rock crushing tool in drilling engineering in order to fractured rock, formation pit shaft.Now used in drilling engineering
Drill bit mainly have rock bit and PDC（Composite polycrystal-diamond）Drill bit.
Cutting tooth on PDC drill bit is fixed on bit body, and cutting tooth is relatively fixed with bit body, and PDC drill bit belongs to be fixed
Step cutting structure bit.Gear wheel in rock bit is passed through bearing arrangement and is connected with bit body formation rotation, during bit operation, drill bit
Body rotarily drive gear wheel around drill axis rotate while, gear wheel also can rotate around the axis of itself, and the cutting tooth on gear wheel exist
The synthesis of above two motion is lower to make complicated compound motion, and rock bit belongs to on-fixed step cutting structure bit.
Stationary cutting structure and cone structure are had on bit body simultaneously（On-fixed cutting structure）Composite drill bit be near
The new rock crushing tool of simultaneously popularization and application is gradually risen over year.In composite drill bit drilling process, gear wheel rotates around drill axis
Simultaneously also around the axis rotation of itself, the cutting tooth on gear wheel under complicated compound motion with bottom rock interaction.Gear wheel
During cutter breaking rock, cutting tooth is being continually changing relative to the action direction of rock, some cutting tooths relatively even rock
Counter motion can be changed to；, all the time without departing from shaft bottom, it is with respect to rock for cutting tooth on gear wheel permanent contact zone with bottom rock
Effect（Scrape and cut）Direction is continually changing between 0～360 °.This makes cannot directly apply on gear wheel and is particularly well suited for scrape butt formula
The composite polycrystal-diamond of broken rock（PDC tooth）The extremely strong diamond class cutting tooth of uniform wearability.Reason is that PDC tooth is by base
Body and polycrystalline diamond layer two parts composition, rise to rock and mainly scrape that cut effect is polycrystalline diamond layer, PDC tooth is scraped cut and made
When there is directionality, can only be polycrystalline diamond layer in front matrix rear.If the Impact direction change in the course of the work of PDC tooth
Amplitude is excessive, or by opposition it is easy to cause polycrystalline diamond layer to be burst apart, the serious work reducing PDC tooth
Life-span, or even make PDC tooth damage inefficacy within the extremely short time.
Therefore, the cutting tooth on the gear wheel of existing composite drill bit is generally hard-metal insert, the wearability of hard-metal insert
With hardness far away from the diamond class cutting tooth such as PDC tooth.The wearability deficiency of cutting tooth is the important of impact gear wheel service life
Factor, the cutting tooth service life that directly affects drill bit easy to wear.
Content of the invention
It is an object of the invention to：There is provided a kind of cutting tooth rotatable composite drill bit, solve on prior art gear wheel no
Method adopts composite teeth（Such as PDC tooth）Problem, even if it is using the cutting tooth consistent with prior art simultaneously（As hard alloy
Tooth）When, the abrasion of cutting tooth and abrasion passivation speed also all more preferable.
The object of the invention is realized by following technical proposals：
A kind of composite drill bit with rotary teeth, including bit body, stationary cutting structure and gear wheel, stationary cutting structure is arranged
There is fixing cutting tooth, gear wheel is to rotate to be connected with bit body, and gear wheel can rotate relative to bit body, and gear wheel is provided with cutting tooth,
Bit body is provided with least one gear wheel, and the cutting tooth on gear wheel at least is rotary teeth, and rotary teeth is formed with gear wheel and turns
It is dynamically connected, the geometric center in the front cutting face of rotary teeth or the front cutting face of rotary teeth rotates against the rotational axis offset of tooth,
And the rear cutting face of rotary teeth or the geometric center in the rear cutting face skew side's homonymy in front cutting face, front cutting face is cut relatively afterwards
Bevel is near the rotation axis of rotary teeth, and can rotate on gear wheel around rotation axis.
Front cutting face described in this patent（It is referred to as rake face）When referring to cutting tooth to downhole formation cutwork, cut
Under the surface flowed out along it of chip.Then cutting face（It is referred to as rear knife face）Then refer to that cutting tooth is relative with downhole formation
Surface, rear cutting face usually faces cutting depth（Direction of feed）Face.Typically, front cutting face and rear cutting face
Intersection formed cutting edge, it serves as main cutwork.
For conventional hard-metal insert, by being combined that matrix and the wearing layer being consolidated on matrix are composited
Tooth, its front cutting face is the front end face of wearing layer, and then cutting face is then the side of wearing layer and/or matrix.So-called wearing layer
For being relative matrix, its wearability is higher, for composite polycrystal-diamond or polycrystal diamond composite teeth or glomerocryst Buddha's warrior attendant
For the composite teeth that stone is composited with impregnated diamond phase, its wearing layer is polycrystalline diamond layer, and matrix is then hard conjunction
Golden or impregnated diamond etc., the rear portion that matrix is in wearing layer pushes away and holds the front end face that support wearing layer and carry out broken rock work front
Make.
Therefore, this patent is mainly wanted to protect a kind of composite drill bit with rotary teeth, including bit body, stationary cutting structure
And gear wheel, stationary cutting structure is provided with fixing cutting tooth, gear wheel is to rotate to be connected with bit body, and gear wheel can relative bit body
Rotate, gear wheel is provided with cutting tooth, bit body is provided with least one gear wheel, the cutting tooth on gear wheel at least is rotation
Turn tooth, rotary teeth forms to rotate with gear wheel and is connected, and rotary teeth has wearing layer and matrix, and several with the front end face of wearing layer
What center is critical point, and rotary teeth entirety or the major part including this geometric center rotate against the rotational axis offset of tooth, and
The front end face of wearing layer, and can rotate on gear wheel around rotation axis near the rotation axis of rotary teeth relative to matrix.
It should be further understood that the rotary teeth of this patent can also be applied to hard-metal insert, cubic boron or impregnated diamond
Tooth（Block）Deng tooth, now rotary teeth just no wearing layer and matrix point.
Composite polycrystal-diamond or polycrystal diamond composite teeth or polycrystalline diamond are combined with impregnated diamond phase
Composite teeth for, its wearing layer is polycrystalline diamond layer, and matrix is then hard alloy or impregnated diamond etc., now
The front end face of polycrystalline diamond layer is then front cutting face, and according to the difference of its front end face shape, front cutting face can be plane（Example
As modal regular cylindrical body PDC tooth, the front end face of its polycrystalline diamond layer is a circular flat）, curved surface（Such as diamond
Layer forms the front end face of a taper, hemispherical or ridge-shaped/wedge shape etc. on matrix）Or the various surfaces such as shaped face.Likewise,
Cutting face, according to the difference of diamond layer or matrix side view, can be the face of cylinder afterwards（For example common regular cylindrical body PDC
Tooth, the side of its polycrystalline diamond layer is the face of cylinder）Or other cylinders or plane etc..
Composite polycrystal-diamond is also known as PDC tooth（Polycrystalline Diamond Compact）Or PDC is combined
Piece, is made up of polycrystalline diamond layer and matrix two parts（Referring to Figure 12）.PDC tooth adopts diadust and hard alloy substrate
Sinter under the conditions of high pressure high temperature and form.Diadust forms the polycrystalline diamond layer of PDC tooth, and hard alloy substrate becomes
The matrix of PDC tooth.PDC tooth had both had the high rigidity of diamond, high-wearing feature, and the intensity with hard alloy is tough with shock resistance
Property, it is the ideal material manufacturing cutting tool, drilling bit and other wear resistant tools.PDC tooth is suitable for work in the way of scraping and cutting
Make, due to the hardness of the polycrystalline diamond layer of PDC tooth and the matrix of wearability significantly larger than Hardmetal materials, therefore PDC tooth
Scrape cut as when there is self-sharpening, that is, the rate of wear of polycrystalline diamond layer be considerably slower than matrix, make the cutting edge of PDC tooth
（Hard and wear-resisting diamond layer）Remain sharp keen state.
When PDC tooth is scraped cut and made, play that mainly scrape the effect of cutting is polycrystalline diamond layer.The polycrystalline diamond layer of PDC tooth is hard
And crisp, matrix phase to soft but there is good toughness, therefore PDC tooth scrape cut as when there is directionality, can only be poly-
Diamond layer front matrix after carry out scraping cutting（As Figure 13）, that is, matrix be in the rear portion of polycrystalline diamond layer and push away to hold and support
Polycrystalline diamond layer.If the counter motion in the course of the work of PDC tooth, matrix front polycrystalline diamond layer after carry out scraping cutting,
Polycrystalline diamond layer directly by opposition it is easy to causing polycrystalline diamond layer to be burst apart or coming off, seriously reduce PDC
The working life of tooth, or even make PDC tooth damage inefficacy within the extremely short time.
This patent compared with the beneficial effect of prior art is：
1st, during rotary teeth contact rock and rock interaction broken rock on this patent gear wheel, no matter cutting tooth and during rock contact
Beginning state is how, when cutting tooth is subject to the active force of rock, because the rotary teeth on gear wheel can rotate relative to gear wheel, rotation
The geometric center in the front cutting face of the front cutting face of tooth or rotary teeth rotates against the rotational axis offset of tooth, and after rotary teeth
The geometric center all in skew side's homonymy or the rear cutting face of rotary teeth for the cutting face is in skew side's homonymy.Effect in rock counter-force
Under, rotary teeth all can rotate front cutting face to tooth front, and rock is cut scraping later in the back side in the front cutting face of rotary teeth.And
Scrape during cutting through rock, no matter how gear wheel rotates, the rotary teeth on gear wheel can be all before cutting face front, front cutting face
The posterior orientation in the back side cuts through rock to scrape.Cutting element on rotary teeth rotates against the rotational axis offset of tooth, in external force
Under effect, along the power of the plane perpendicular to rotation axis（Component）Rotary teeth will be promoted to rotate about axis rotation, make rotation
The normal in the front cutting face of tooth always cuts broken rock along scraping butt, and the front cutting face normal direction of cutting tooth is pointed to all the time and scraped butt
To.The rotary teeth of this patent biasing has orientation self-regulation adaptation function, so that the cutting element on rotary teeth was cut before all the time
Bevel to be scraped in the posterior orientation in the back side in front, front cutting face and to cut through rock.So, just can be using the strong gold of wearability on this patent
Hard rock class cutting tooth, particularly can be using being particularly well suited for scraping the PDC tooth of butt formula broken rock.The organization plan that this patent is adopted
For diamond class cutting tooth, particularly PDC tooth applies the condition that provides in rock bit.
2nd, the rotary teeth on this patent gear wheel can rotate relative to gear wheel and the cutting element of rotary teeth biases, and rotary teeth is all the time
Cut work is scraped relative to rock with stable tangent plane of scraping.No matter how bit cone rotates, the position of gear wheel and rotary teeth thereon
How, no matter scraping of cutting tooth cuts how the direction of motion changes on gear wheel, the rotary teeth on gear wheel all the time can be with its front cutting face
Scrape in the posterior orientation in the back side in front, front cutting face and cut rock, relative to rock, rotary teeth scrapes that to cut operative orientation constant all the time, this
Be conducive to slowing down the abrasion of cutting tooth.Relative to scraping of rock, cutting tooth cuts that frictional direction is constant all the time, compared with cutting on conventional roller cone
Butt is scraped to the working method being continually changing relative to rock, even if this patent employing is consistent with prior art when cutting tooth work
Cutting tooth（As hard-metal insert）, the abrasion of its cutting tooth and abrasion passivation speed all to get well.
3rd, the cutting element on the rotary teeth on this patent can adopt wearability strong and be extremely suitable for scrape butt formula broken rock
PDC tooth, PDC tooth scrape cut as when there is good self-sharpening, the rate of wear of polycrystalline diamond layer is considerably slower than matrix.General
Cutting tooth on logical gear wheel in the drill bit broken rock course of work, cutting tooth relative to scraping butt to being continually changing between rock,
Hard-metal insert on gear wheel can be passivated by rounding scraping butt tooth top water caltrop to during be continually changing, and scrape and cut efficiency fall
Low.PDC tooth is adopted, no matter how gear wheel rotates, and the orientation of cutting tooth how, and the PDC tooth on rotary teeth all the time can on rotary teeth
Scraped in the posterior operating configurations of front matrix with polycrystalline diamond layer and cut rock, PDC tooth scrapes butt to remaining relative to rock
Constant, PDC tooth is scraped with normal direction all the time and is cut through rock, and it is conducive to PDC tooth to scrape cutting through giving full play to of rock advantage, can be fully
Using the wearability of PDC tooth with from sharp characteristic.PDC tooth relative harder carbide button is easier to invade rock, is easier to scrape and cuts through rock.
Therefore, while the gear wheel of composite drill bit significantly improving drilling life of bit using rotary teeth, improve Cutter
Scrape the efficiency of breaking rock cutting efficiency and drill bit.
Alternatively, the front cutting face of rotary teeth is towards its rotation axis.As selecting further, the front cutting of rotary teeth
The normal of the mistake geometric center in face rotates axis and intersects.
Alternatively, rotary teeth includes rotating, with gear wheel, the rotary shaft being connected, and fixing cutting unit on the rotary shaft
Part, cutting element is selected from composite polycrystal-diamond（PDC tooth）, polycrystal diamond composite teeth（I.e. polycrystalline diamond and matrix are adopted
Take the complex form beyond aforementioned compound sheet form, be referred to as " polycrystal diamond composite teeth "）, TSP be combined
Tooth, impregnated diamond tooth（Block）, cubic boron, ceramic tooth or polycrystalline diamond and answering that impregnated diamond phase is composited
Close one or more of tooth, and cutting element is composite polycrystal-diamond, polycrystal diamond composite teeth or polycrystalline diamond
During the composite teeth being composited with impregnated diamond phase, the front end face of the polycrystalline diamond layer of its cutting tooth is front cutting face.Should
In scheme, because this patent adopts the structure of rotary teeth, the cutting element on rotary teeth can be with stable direction relative to rock
Scrape cut to make, wearability preferably above-mentioned cutting element can be used therefore on the rotary teeth of this patent, to improve Cutter
And the service life of whole drill bit and efficiency of breaking rock.
Alternatively, the geometric center in the front cutting face of the front cutting face of rotary teeth or rotary teeth rotates against the rotation of tooth
The offset distance of axis is more than 1/8th of the rotary shaft radius of rotary teeth, less than the twice of rotary shaft radius.In the program, it is
Rotary teeth and rock interaction is enable smoothly to rotate when working to correctly scraping butt to and keeping good and scrape butt position, rotation
The offset distance of the rotation axis that the geometric center turning the front cutting face of tooth or the front cutting face of rotary teeth rotates against tooth can not be too
Little, offset distance is more big more smooth rotation that be easy to rotary teeth, order about rotary teeth rotate to the driving force of normal orientation also will be more sufficient,
Also more it is easy to ensure that rotary teeth can keep good during gear wheel is rotating and scrape butt position.But offset distance nor too
Greatly, too big offset distance will make rotary teeth occupy larger revolution space, causes the waste in gear wheel cloth tooth space.As further
Select, the geometric center in the front cutting face of rotary teeth or the front cutting face of rotary teeth rotates against the offset distance of the rotation axis of tooth
Between 1～32mm.
Alternatively, the cutting element on rotary teeth is 1-6.In the program, the cutting element on rotary teeth can be 1
Individual or multiple, can be arranged according to the actual size of bit size, rotary teeth size and cutting element and cut on rotary teeth
Cut the quantity of element.As selecting further, the cutting element on rotary teeth is 1,2 or 3.
Alternatively, bit body arranges 1 gear wheel.After outside diameter determines, the space on drill bit is limited and valuable
's.On composite drill bit, only 1 gear wheel is set, is conducive to the small-sized of composite drill bit.When the well bored is less, corresponding drill bit
When external diameter is less, drill bit is left the limited space of gear wheel for, composite drill bit only can form single cone composite drill by 1 gear wheel of setting
Head.The Single-cone compound drill bit of only 1 gear wheel, its gear wheel is generally large with the contact area of bottom rock, on gear wheel mostly
Number surfaces contact with bottom rock, and the cutting tooth on gear wheel will scrape butt formula fractured rock with relatively long distance, employing on gear wheel
The rotary teeth of this patent, is conducive to improving the efficiency of breaking rock of gear wheel and drill bit, extends drilling life of bit.
Alternatively, bit body is provided with 2-4 gear wheel.When outside diameter is larger, composite drill bit can be arranged many
Individual gear wheel, such as 2-4 gear wheel.Multiple gear wheels are arranged on composite drill bit, bit cutting structure can be made more to equalize more symmetrical, be conducive to
Improve stability during bit operation.
Alternatively, rotary teeth is arranged on the stationary cutting structure of bit body.Further, rotary teeth is arranged on drill bit
On the center portion region in footpath inside 1/3rd.When drill bit creeps into complexity（As compound drilling）When, cutting tooth complicated movement, cutting tooth
Relatively rock scrape butt to changing greatly and change frequently.Rotary teeth is applied on stationary cutting structure, can improve cutting tooth
Scrape butt to adaptability, improve cutting tooth service life, and then improve the service life of drill bit.In bit drilling process
When there is the compound movement such as lateral vibration, the cutting tooth of drill bit center portion cuts direction change frequently easy generation premature failure because scraping, in drill bit
On the center portion region in footpath inside 1/3rd, rotary teeth is set, can strengthen drill bit center portion cutting tooth scrapes butt to adaptability, carries
High drilling life of bit.
Alternatively, fortune on rotation axis direction for the restricted rotary teeth is set between the rotary shaft of rotary teeth and gear wheel
Dynamic locking mechanism.In the program, when rotary teeth is arranged on gear wheel, for preventing rotary teeth along the direction play of rotation axis or
Come off along axis, locking mechanism can be set between rotary teeth and gear wheel, strengthen reliability and the security of rotary teeth.Here
Locking refers to rotary teeth is spacing along the direction of rotation axis, prevents rotary teeth from along the direction play of rotation axis or coming off, and
Do not limit rotary teeth rotating relative to gear wheel.As selecting further, ball between the rotary shaft of rotary teeth and gear wheel, is adopted to lock
Tightly.While ball locking can reduce impact rotary teeth rotary motion as far as possible, enable rotary teeth along its rotation axis direction
Spacing and axial locking, and be easy to process.
Alternatively, it is provided with sealing structure between the rotary shaft of rotary teeth and gear wheel.In the program, during bit operation at
In the environment such as drilling fluid, landwaste, rotary teeth can rotate relative to gear wheel, for preventing other materials from entering the rotation of rotary teeth and gear wheel
Turn between pair, sealing structure can be set between rotary teeth and gear wheel, to reduce the abrasion of revolute, extend the use of revolute
Life-span.
The aforementioned main scheme of the present invention and its each further selection scheme can be this with independent assortment to form multiple schemes
Invention can adopt and claimed scheme；And the present invention,（Each non conflicting selects）Between selection and and other selections between
Can also independent assortment.Those skilled in the art can understand have according to prior art and common knowledge after understanding the present invention program
Multiple combination, is the claimed technical scheme of the present invention, and here does not do exhaustion.
Brief description
Fig. 1, Fig. 2 are the structural representation of the embodiment of the present invention 1.
Fig. 3 is that the rotary teeth of the embodiment of the present invention 1 scrapes schematic diagram when cutting through rock.
Fig. 4 is the rotary shaft of the rotary teeth of the embodiment of the present invention 1 is to arrange the structural representation of stepped axle journal shape.
Fig. 5 is the rotary shaft of the rotary teeth of the embodiment of the present invention 1 is cylindrical structural representation.
The structural representation that Fig. 6, Fig. 7 are 2 for the cutting element on the rotary teeth of the embodiment of the present invention 1.
Fig. 8, Fig. 9 are to arrange 1 gear wheel on the bit body of the embodiment of the present invention 1, and gear wheel front end is provided with stationary cutting structure
Structural representation.
Figure 10 is the structural representation arranging 2 gear wheels on the bit body of the embodiment of the present invention 2.
Figure 11 is to be provided with locking mechanism and sealing structure between the embodiment of the present invention 4, the rotary teeth of embodiment 5 and gear wheel
Structural representation.
Figure 12 is conventional PDC toothing schematic diagram.
Figure 13 is that conventional PDC tooth normally scrapes schematic diagram when cutting through rock.
Figure 14, Figure 15, Figure 16 are that the shape of the cutting element on the rotary teeth of the embodiment of the present invention 1 is respectively semicolumn
The structural representation of shape, wedge shape and vertically arranged cylinder.
In figure：1st, bit body, 2, gear wheel, 3, rotary teeth, 31, PDC tooth matrix, 32, the polycrystalline diamond layer of PDC tooth, 33,
The front cutting face of rotary teeth, 34, the rotation axis of rotary teeth, 35, the rear cutting face of rotary teeth, 36, the rotary shaft of rotary teeth,
37th, the back side in the front cutting face of rotary teeth, 4, stationary cutting structure, 41, fixing cutting tooth, 5, sealing structure, 6, locking mechanism,
7th, rock.
Specific embodiment
Following non-limiting examples are used for the present invention is described.
Embodiment 1：
With reference to shown in Fig. 1-5, a kind of composite drill bit with rotary teeth, including bit body 1, stationary cutting structure 4 and gear wheel 2,
Fixing cutting tooth 41 is provided with stationary cutting structure 4, gear wheel 2 is to rotate to be connected with bit body 1, and gear wheel 2 can relative bit body 1
Rotate, gear wheel 2 is provided with cutting tooth, bit body 1 is provided with least one gear wheel 2, the cutting tooth on gear wheel 2 at least
For rotary teeth 3, rotary teeth 3 forms to rotate with gear wheel 2 and is connected, and rotary teeth 3 energy rotate relative to gear wheel 2.Alternatively, as this enforcement
Shown in example, rotary teeth 3 includes rotating, with gear wheel 2, the rotary shaft 36 being connected, and is fixed on the cutting element in rotary shaft 36, tooth
The axis hole of the rotary shaft 36 accommodating matching rotation tooth 3 is correspondingly provided with wheel 2, rotary shaft 36 insertion axle in the hole rotates on gear wheel 2.
Rotary shaft 36 can have a various ways, such as Fig. 4,7 be the rotary shaft 36 of rotary teeth 3 be that stepped axle journal shape is set, Fig. 5,6
Rotary shaft 36 for rotary teeth 3 is cylinder.Cutting element is consolidated in the top surface of rotary shaft 36, its front end face（Before wearing layer
End face）Have angle with the top surface of rotary shaft 36, cutting element can also have various ways with the consolidation form of rotary shaft 36：Example
As shown in Figure 4,5, its part of matrix and wearing layer side are absorbed in and being fixed in top surface, or as shown in Figure 6,7, shape in top surface
Become a boss, its body portion side is absorbed in be fixed in boss, and wearing layer then exposure outside boss.The cutting of rotary teeth 3
The rotation axis 34 that geometric center O in the front cutting face 33 of element or front cutting face 33 rotates against tooth 3 offsets, and rotary teeth 3
Rear cutting face 35 or rear cutting face 35 geometric center in skew side homonymy, front cutting face 33 relatively after cutting face 35 is close revolves
Turn the rotation axis 34 of tooth, and can rotate on gear wheel 2 around rotation axis 34.Alternatively, the cutting element on rotary teeth 3 is
Composite polycrystal-diamond（PDC tooth）, polycrystal diamond composite teeth, TSP composite teeth, impregnated diamond tooth
（Block）, the composite teeth that is composited with impregnated diamond phase of cubic boron, ceramic tooth or polycrystalline diamond.As further
Select, the cutting element on rotary teeth 3 is composite polycrystal-diamond（PDC tooth）.Composite polycrystal-diamond is by glomerocryst Buddha's warrior attendant
Rock layers 32 and matrix 31 two parts composition（Referring to Figure 12）, before the front end face of wherein polycrystalline diamond layer 32 is cutting element
Cutting face 33, side is rear cutting face 35（With reference to Fig. 3）.Alternatively, the cutting element on rotary teeth 3 be shaped as semicolumn
Shape（With reference to Figure 14）, wedge shape（With reference to Figure 15）Or vertically arranged cylinder（With reference to Figure 16）Deng.Alternatively, rotary teeth 3
The offset distance S that geometric center O in the front cutting face 33 of front cutting face 33 or rotary teeth 3 rotates against the rotation axis 34 of tooth 3 is big
Rotary shaft 36 radius in rotary teeth 3（Rotary shaft 36 is placed in the radius of cylinder in axis hole or necked part）1/8th,
Twice less than rotary shaft 36 radius（With reference to Fig. 3, Figure 11）.As selecting further, the front cutting face 33 of rotary teeth 3 or rotation
The geometric center in the front cutting face 33 of tooth 3 rotates against the offset distance S of the rotation axis 34 of tooth 3 between 1～32mm.Rotary teeth
On cutting element can be 1 or multiple.Alternatively, the cutting element on rotary teeth 3 is 1-6.As entering
One step selects, and the cutting element on rotary teeth 3 is 1（As shown in Figure 1, Figure 2, Fig. 4, Fig. 5）, 2（As Fig. 6, Fig. 7）Or 3.Cutting
During unit 1, the normal of the preferably mistake geometric center in the front cutting face of rotary teeth rotates axis 34 and intersects.Work as cutting unit
When multiple, the front cutting face 33 of each cutting unit is side by side towards rotation axis 34, and it is uniform to rotate against axis 34 about.Drill bit
On body, the gear wheel of setting can be 1 or multiple.Alternatively, bit body arranges 1 gear wheel（As shown in Figure 1, Figure 2,
Fig. 8, Fig. 9）.Alternatively, bit body 1 is provided with 2-4 gear wheel, with reference to shown in Figure 10, bit body 1 is provided with 2 teeth
Wheel.
Embodiment 2：
The present embodiment is substantially the same manner as Example 1, and its difference is：Rotary teeth 3 is arranged on the stationary cutting structure 4 of bit body 1
On.
Embodiment 3：
With reference to shown in Figure 11, the present embodiment is substantially the same manner as Example 1, and its difference is：The rotary shaft of rotary teeth 3 and gear wheel 2
Between the locking mechanism 6 that restricted rotary teeth 3 moves along rotation axis 34 direction relative to gear wheel 2 is set.Rotary teeth 3 and gear wheel 2
Between elastic collar structure can be set, to prevent rotary teeth 3 from coming off along the direction play of rotation axis 34 or along axis, rotary teeth
Structure can be threaded between 3 and gear wheel 2, spacing for the rotary teeth 3 rotary teeth in the hole in gear wheel 2 is prevented by rotary teeth by nut
Along the direction play of rotation axis or come off.As selecting further, ball between rotary teeth 3 and gear wheel 2, is adopted to lock（As figure
11）.
Embodiment 4：
With reference to shown in Figure 11, the present embodiment is substantially the same manner as Example 1, and its difference is：The rotary shaft of rotary teeth 3 and gear wheel 2
Between be provided with sealing structure 5.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of composite drill bit with rotary teeth, including bit body, stationary cutting structure and gear wheel, stationary cutting structure sets
It is equipped with fixing cutting tooth, gear wheel is to rotate to be connected with bit body, and gear wheel can rotate relative to bit body, and gear wheel is provided with cutting
Tooth it is characterised in that：Bit body is provided with least one gear wheel, and the cutting tooth on gear wheel at least is rotary teeth, rotation
Tooth forms to rotate with gear wheel and is connected, and the geometric center in the front cutting face of rotary teeth or the front cutting face of rotary teeth rotates against tooth
Rotational axis offset, and the rear cutting face of rotary teeth or the geometric center in the rear cutting face skew side's homonymy in front cutting face, front
The relatively rear cutting face in cutting face is near the rotation axis of rotary teeth, and can rotate on gear wheel around rotation axis.
2. the composite drill bit with rotary teeth according to claim 1 it is characterised in that：Rotary teeth includes rotating with gear wheel
The rotary shaft connecting, and fixing cutting element on the rotary shaft, cutting element is selected from composite polycrystal-diamond, glomerocryst gold
Hard rock composite teeth, TSP composite teeth, impregnated diamond tooth, cubic boron, ceramic tooth or polycrystalline diamond
One or more of composite teeth being composited with impregnated diamond phase, and cutting element be composite polycrystal-diamond, poly-
During the composite teeth that diamond composite teeth or polycrystalline diamond are composited with impregnated diamond phase, the glomerocryst gold of its cutting tooth
The front end face of hard rock layer is front cutting face.
3. the composite drill bit with rotary teeth according to claim 1 it is characterised in that：The front cutting face of rotary teeth or rotation
The offset distance of the rotation axis that the geometric center turning the front cutting face of tooth rotates against tooth is more than the rotary shaft radius of rotary teeth
1/8th, less than the twice of rotary shaft radius.
4. the composite drill bit with rotary teeth according to claim 1 or 3 it is characterised in that：The front cutting face of rotary teeth
Or the geometric center in the front cutting face of rotary teeth rotates against the offset distance of the rotation axis of tooth between 1～32mm.
5. the composite drill bit with rotary teeth according to claim 1 it is characterised in that：Cutting element on rotary teeth is
1-6.
6. the composite drill bit with rotary teeth according to claim 1 it is characterised in that：The mistake in the front cutting face of rotary teeth
The normal of geometric center rotates axis and intersects.
7. the composite drill bit with rotary teeth according to claim 1 it is characterised in that：Rotary teeth is arranged on bit body
On stationary cutting structure.
8. the composite drill bit with rotary teeth according to claim 1 and 2 it is characterised in that：The rotary shaft of rotary teeth with
The locking mechanism of motion on rotation axis direction for the restricted rotary teeth is set between gear wheel.
9. the composite drill bit with rotary teeth according to claim 8 it is characterised in that：The rotary shaft of rotary teeth and gear wheel
Between using ball locking.
10. the composite drill bit with rotary teeth according to claim 1 and 2 it is characterised in that：The rotary shaft of rotary teeth with
It is provided with sealing structure between gear wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611049383.7A CN106401484B (en) | 2016-11-25 | 2016-11-25 | A kind of composite drill bit with rotary teeth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611049383.7A CN106401484B (en) | 2016-11-25 | 2016-11-25 | A kind of composite drill bit with rotary teeth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106401484A true CN106401484A (en) | 2017-02-15 |
| CN106401484B CN106401484B (en) | 2018-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611049383.7A Active CN106401484B (en) | 2016-11-25 | 2016-11-25 | A kind of composite drill bit with rotary teeth |
Country Status (1)
| Country | Link |
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| CN (1) | CN106401484B (en) |
Cited By (5)
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| WO2018095441A1 (en) * | 2016-11-25 | 2018-05-31 | 西南石油大学 | Single cone bit having rotating tooth |
| CN109306851A (en) * | 2017-07-28 | 2019-02-05 | 西南石油大学 | A kind of rotary cutting module and the diamond bit with this module |
| CN110273650A (en) * | 2018-03-15 | 2019-09-24 | 西南石油大学 | A kind of diamond bit with flexible cutting structure |
| CN110359856A (en) * | 2018-02-10 | 2019-10-22 | 西南石油大学 | Combined type diamond bit with slew buffer structure |
| CN110792397A (en) * | 2019-12-11 | 2020-02-14 | 西南石油大学 | Composite drill bit |
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| CN205532305U (en) * | 2016-03-29 | 2016-08-31 | 西南石油大学 | Rotatable PDC drill bit of cutting teeth |
| CN206190213U (en) * | 2016-11-25 | 2017-05-24 | 西南石油大学 | Composite drill bit with rotary teeth |
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| US20060013656A1 (en) * | 2004-07-13 | 2006-01-19 | Berkel & Company Contractors, Inc. | Full-displacement pressure grouted pile system and method |
| CN201671547U (en) * | 2010-05-06 | 2010-12-15 | 中国石油天然气股份有限公司 | PDC drill with gauge having cylinder roller |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018095441A1 (en) * | 2016-11-25 | 2018-05-31 | 西南石油大学 | Single cone bit having rotating tooth |
| US10961784B2 (en) | 2016-11-25 | 2021-03-30 | Southwest Petroleum University | Rotating cutter single cone bit |
| CN109306851A (en) * | 2017-07-28 | 2019-02-05 | 西南石油大学 | A kind of rotary cutting module and the diamond bit with this module |
| CN109306851B (en) * | 2017-07-28 | 2024-03-15 | 西南石油大学 | Rotary cutting module and diamond drill bit with same |
| CN110359856A (en) * | 2018-02-10 | 2019-10-22 | 西南石油大学 | Combined type diamond bit with slew buffer structure |
| CN110273650A (en) * | 2018-03-15 | 2019-09-24 | 西南石油大学 | A kind of diamond bit with flexible cutting structure |
| CN110792397A (en) * | 2019-12-11 | 2020-02-14 | 西南石油大学 | Composite drill bit |
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|---|---|
| CN106401484B (en) | 2018-10-30 |
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