CN105927157A - Cutting tooth and PDC (polycrystalline diamond compact) drill bit with same - Google Patents
Cutting tooth and PDC (polycrystalline diamond compact) drill bit with same Download PDFInfo
- Publication number
- CN105927157A CN105927157A CN201610411220.2A CN201610411220A CN105927157A CN 105927157 A CN105927157 A CN 105927157A CN 201610411220 A CN201610411220 A CN 201610411220A CN 105927157 A CN105927157 A CN 105927157A
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- shovel
- face
- matrix
- cutting tooth
- drill bit
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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
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- 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
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a cutting tooth and a PDC (polycrystalline diamond compact) drill bit with the same. The cutting tooth comprises a base. The base is of a column structure, a shoveling-in portion is formed at an end of the base and comprises a first side surface, a shoveling surface and a main shovel blade; the first side surface of the shoveling-in portion extends along the wall surface of the base; the shoveling surface of the shoveling-in portion is formed on the top surface of the base and obliquely extends from the main shovel blade to the wall surface, which is opposite to the main shovel blade, of the base; the main shovel blade is formed on the shoveling surface of the shoveling-in portion; the shovel surface of the shoveling-in portion is provided with a shovel top and a shovel bottom, the distance from the shovel top to the bottom surface of the base is the height of the shovel top, the distance from the shovel bottom to the bottom surface of the base is the height of the shovel bottom, and the height of the shovel top is larger than the height of the shovel bottom. The cutting tooth and the PDC drill bit have the advantages that the cutting tooth is extremely small in rock stratum contact area and extremely high in cutting pressure, is easy to prick into rock strata to split the rock strata and is high in speed and efficiency, and the service life of the cutting tooth can be prolonged.
Description
Technical field
The present invention relates to a kind of petroleum drilling technology, cut tooth in particular to one.The invention still further relates to one
PDC drill bit.
Background technology
The PDC drill bit of traditional oil drilling, tooth is usually cylinder contrate, cylinder founds tooth and pointed tooth in its cutting, although
The cutting tooth of above-mentioned form played an important role in the historical floods of oil drilling, but, the cutting tooth of above-mentioned form
Remain deficiency.Specific as follows:
1. cylinder contrate: cylinder contrate is relatively big with the contact area of rock, and cutting resistance is big, is difficult to cut stratum, therefore
Easily collapse broken composite sheet；2. except this, cylinder contrate quick abrasion, stock-removing efficiency is low, and along with the abrasion of composite sheet, cutting face is rapidly by standing
Body fillet gradually becomes the straight angle, and the area of bit cutting is gradually increased, and cutting pressure reduces, and makes the amount of feeding constantly reduce, drill bit
Arc top tapers into, and makes drill bit quickly lose cutting power；3. to found the diamond layer thickness of tooth on the low side for cylinder, and service life is relatively
Short, cutting effect is poor.
Summary of the invention
Introducing the concept of a series of reduced form in Summary, this will enter in detailed description of the invention part
One step describes in detail.Present invention part is not meant to attempt to limit the crucial special of technical scheme required for protection
Seek peace essential features, more do not mean that the protection domain attempting to determine technical scheme required for protection.
One main purpose of the present invention is to overcome at least one defect of above-mentioned prior art, it is provided that a kind of cutting
Tooth, to improve the service life of cutting tooth.
Another main purpose of the present invention is to overcome at least one defect of above-mentioned prior art, it is provided that a kind of PDC
Drill bit, with the service life improving PDC drill bit service life by improving cutting tooth.
For achieving the above object, the present invention adopts the following technical scheme that
According to an aspect of the invention, it is provided a kind of described cutting tooth includes the matrix of column structure, described matrix
End be formed and shovel into portion, described shovel includes into portion: the first side, and described first side extends along the wall of described matrix；
The main edge of shovel, the described main edge of shovel is a part for described first side；Shovel face, described shovel face from the described main edge of shovel to described main shovel
The wall of the described matrix that sword is relative tilts to extend, and wherein said shovel mask has shovel top and the shovel end, matrix described in described shovel apex distance
The distance of bottom surface be shovel heights of roofs, the distance of bottom surface away from described matrix at the bottom of described shovel is shovel end height, described shovel heights of roofs
More than height at the bottom of described shovel.
According to an embodiment of the present invention, wherein said cutting tooth includes the matrix of column structure, the end of described matrix
Portion is formed and shovels into portion, and described shovel includes into portion；First side, described first side extends along the wall of described matrix；Shovel face,
Described shovel face tilts to extend to described first side from the wall of the described matrix relative with described first side, with near institute
Stating one tip with seamed edge of formation at the first side, described seamed edge is the main edge of shovel, and wherein said shovel mask has shovel top and shovel
The end, the distance of the bottom surface of matrix described in described shovel apex distance is shovel heights of roofs, and the distance of bottom surface away from described matrix at the bottom of described shovel is
Shovel end height, described shovel heights of roofs is more than height at the bottom of described shovel.
According to an embodiment of the present invention, wherein said shovel face is that curved surface or be connected with each other by multiple planes forms.
According to an embodiment of the present invention, wherein said shovel also includes into portion: the second side, described second side and institute
The bottom surface stating matrix is the first angle；3rd side, described 3rd side is the second angle with the bottom surface of described matrix；Described
Two side faces and the described 3rd spaced setting in side and lay respectively at both sides, described shovel face, described shovel face is arranged at described second
Between side and described 3rd side.
According to an embodiment of the present invention, wherein said shovel heights of roofs H2 is in the range of 5mm≤H2≤20mm, described shovel
Height H1 is in the range of 3mm≤H1≤18mm at the end.
According to an embodiment of the present invention, the wherein said outer surface shoveling portion is provided with glomerocryst layer.
According to a further aspect in the invention, the present invention also provides for a kind of PDC drill bit, and described PDC drill bit includes: drill bit is originally
Body；Cutting tooth, described cutting tooth is arranged on described drill body；Wherein, described cutting tooth includes: main cutting tooth, described master
The cutting tooth that cutting tooth provides for the present invention, described main cutting tooth is arranged at the end face of the bizet of described drill body；Gauge teeth,
Described gauge teeth is arranged at the outer peripheral face of the bizet of described drill body.
According to an embodiment of the present invention, wherein said PDC drill bit also includes cutting wing, and described cutting wing is from institute
The end face of the bizet stating drill body extends to the outer peripheral face of the bizet of described drill body, described main cutting tooth and described gauge
Tooth is respectively arranged on described cutting wing.
According to an embodiment of the present invention, wherein said main cutting tooth has side drift angle or negative on described cutting wing
Anterior angle, wherein said side drift angle is γ, and described negative rake is β, described side drift angle and described negative rake in the range of: 0 ° of ＜ γ≤
20 °, 0 ° of ＜ β≤20 °.
According to an embodiment of the present invention, wherein said PDC drill bit also includes that tank, described tank are arranged at adjacent
Between described cutting wing, being provided with nozzle in described tank, described nozzle connects with water source.
According to an embodiment of the present invention, wherein said cutting wing includes: the first straightway, described first straightway
Diagonally direction to extend from the close center of described bizet to edge, described first straightway has tail end, described tail
End is near described edge；Second straightway, described second straightway from the described end face of described bizet to the bottom of described bizet
Extending, described second straightway and the centerline axis parallel of described matrix, described second straightway has head end, and described head end leans on
Nearly described end face；Arc section, described arc section is arranged at the described tail end of described first straightway and described second straightway
Between described head end, described arc section outwardly, the angle of the bottom surface of wherein said first straightway and described matrix is 0 °-
45°。
According to an embodiment of the present invention, wherein said PDC drill bit also includes protecting tooth, and described protection tooth is arranged at institute
State between main cutting tooth and described gauge teeth.
According to an embodiment of the present invention, wherein said gauge teeth is semi-cylindrical structure or semicircular planform structure.
As shown from the above technical solution, cutting tooth and the advantage of PDC drill bit of the present invention and have the active effect that the present invention
The area that the cutting tooth provided contacts with rock stratum is the least, and cutting pressure is the biggest, it is easy to penetrates rock stratum and is split rock stratum,
Speed is fast, and efficiency is high, owing to this shovels portion after abrasion, remains to keep having between the main edge of shovel and rock stratum less connecing
Contacting surface is amassed, thus improves the service life of cutting tooth, efficiently against or avoid present in above-mentioned prior art shortcoming or
Not enough.
Further, by using above-mentioned cutting tooth, the PDC drill bit with above-mentioned cutting tooth is enable to extend the use longevity
Life.
Accompanying drawing explanation
By being considered in conjunction with the accompanying following the following detailed description of the embodiment of the present invention, the various targets of the present invention,
Feature and advantage will become apparent from.Accompanying drawing is only the exemplary diagram of the present invention, is not necessarily drawn to scale.
In the accompanying drawings, same reference represents same or similar parts all the time.Wherein:
Fig. 1 is according to a kind of front view cutting tooth shown in an illustrative embodiments.
Fig. 2 is according to a kind of left view cutting tooth shown in an illustrative embodiments.
Fig. 3 is according to a kind of right view cutting tooth shown in an illustrative embodiments.
Fig. 4 is the front view according to a kind of PDC drill bit shown in an illustrative embodiments.
Fig. 5 is the top view according to a kind of PDC drill bit shown in an illustrative embodiments.
Fig. 6 is the profile according to a kind of PDC drill bit shown in an illustrative embodiments.
Fig. 7 is the side drift angle of the cutting tooth according to a kind of PDC drill bit shown in an illustrative embodiments.
Fig. 8 is the negative rake of the cutting tooth according to a kind of PDC drill bit shown in an illustrative embodiments.
Fig. 9 is according to a kind of working state schematic representation cutting tooth shown in an illustrative embodiments.
Figure 10 is the longitudinal sectional drawing of the cutting tooth in Fig. 9.
Figure 11 is the working state schematic representation of cutting tooth of the prior art.
Wherein, description of reference numerals is as follows:
1, drill body；2, main cutting tooth；3, protection tooth；
4, gauge teeth；5, cutting wing；6, nozzle；
7, the main edge of shovel；8, shovel face；9, the first side；
10, the second side；11, the 3rd side；21, matrix；
γ, side drift angle；β, negative rake；Angle；
H1, shovel end height；H2, shovel heights of roofs；
Detailed description of the invention
It is described more fully with example embodiment referring now to accompanying drawing.But, example embodiment can be with multiple shape
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, it is provided that these embodiments make the present invention incite somebody to action
Fully and completely, and by the design of example embodiment those skilled in the art is conveyed to all sidedly.Accompanying drawing identical in figure
Labelling represents same or similar structure, thus will omit their detailed description.
Fig. 1 is according to a kind of front view cutting tooth shown in an illustrative embodiments.Fig. 2 is according to an exemplary reality
Execute a kind of left view cutting tooth shown in mode.Fig. 3 is according to a kind of right side cutting tooth shown in an illustrative embodiments
View.
Referring to figs. 1 through Fig. 3, according to an aspect of the invention, it is provided a kind of cutting tooth, this cutting tooth includes that cylinder is tied
The matrix 21 of structure, it is to be understood that the structure of matrix 21 can be Elliptic Cylinder, square cylinder or other people in the art
Member it is conceivable that post body structure all within the scope of the present invention, tubular matrix 21 that the present invention provides, as
Shown in Fig. 3, the diameter of this matrix 21 may be selected to be 10mm to 25mm.
The end of matrix 21 is formed to be shoveled into portion, in order to improve the hardness of cutting tooth, shovels and is provided with on the outer surface in portion
Glomerocryst layer, shovels and includes into portion: the first side 9 that the wall along matrix 21 extends；It is formed with the main edge of shovel on the top of the first side 9
7, the main edge of shovel 7 is a part for the first side 9；Tilt to extend shape from the main edge of shovel 7 to the wall of the matrix 21 relative with the main edge of shovel 7
Becoming and have shovel face 8, wherein shovel face 8 has shovel top and the shovel end, and the position at this main edge of shovel 7 place is shovel top, the end of shovel apex distance matrix 21
The distance in face is shovel heights of roofs H2, is the shovel end with the wall of the main edge of shovel 7 matrix 21 in 180 degree of angles, and the shovel end is away from matrix 21
The distance of bottom surface is shovel end height H1, and shovel heights of roofs H2 is more than shovel end height H1.
The first side defined in this specification, is considered as from the upwardly extending one side in matrix 21 side, the first side
The surface of the most corresponding matrix 21 in face, in order to for forming the main edge of shovel 7 and the shovel face 8 tilted, thus form an inclination
Entering portion to the shovel of side, described shovel into portion can be wedge structure.It is wedge structure owing to this shovels into portion, through abrasion
After, this shovels and remains to keep the main edge of shovel 7 and rock stratum to have less contact area into portion, thus extends the use longevity of cutting tooth
Life.
Fig. 9 is according to a kind of working state schematic representation cutting tooth shown in an illustrative embodiments.Figure 10 is in Fig. 9
Cutting tooth longitudinal sectional drawing.Figure 11 is the working state schematic representation of cutting tooth of the prior art.
Shovel face 8 extends formation, Ke Yili from the main edge of shovel 7 to the wall with this main edge of shovel 7 matrix 21 in the angle of 180 degree
Solving, shovel face 8 is formed as shoveling into the end face in portion or shovels the part of the end face into portion.When using this cutting tooth, the main edge of shovel 7
Being inserted in rock stratum, the fragment that the parcel cutting of shovel face 8 is formed, therefore the cutting way of this cutting tooth is referred to as shovelling cutting, as
Shown in Fig. 9 and Figure 10.It is understood that the main edge of shovel 7 can be the part on the top of the first side 9, this main edge of shovel 7 and rock
The contact area of layer is little, in the case of the rock stratum of cutting condition of equivalent thickness, cutting pressure can be kept constant or have the least
Change.Further, since the main edge of shovel 7 is little with the contact area of rock stratum, this main edge of shovel 7 is made easily to shovel into rock stratum and be split rock stratum
Open, improve cutting speed.
Referring to figs. 1 through Fig. 3, according to an aspect of the invention, it is provided a kind of cutting tooth, wherein cutting tooth includes cylinder
The matrix 21 of structure, it is to be understood that the structure of matrix 21 can be Elliptic Cylinder, square cylinder or those skilled in the art
It is conceivable that the post body structure of other shapes all within the scope of the present invention, tubular base that the present invention provides
Body 21, as shown in Figure 3.The end of matrix 21 is formed to be shoveled into portion, shovels and includes into portion: the first side that the wall along matrix 21 extends
Face 9；Tilt extension from the wall of the matrix 21 relative with the first side 9 to the first side 9 and be formed with shovel face 8, with near the
Forming a tip with seamed edge at one side 9, seamed edge is the main edge of shovel 7, as in figure 2 it is shown, wherein shovel face 8 has shovel top and shovel
The end, the position at this main edge of shovel 7 place for shovel top, shovel apex distance matrix 21 bottom surface distance for shovel heights of roofs H2, with the main edge of shovel 7 in
The wall of the matrix 21 of 180 degree of angles is the shovel end, and the distance of the shovel bottom surface away from matrix 21, the end is shovel end height H1, shovels heights of roofs H2
More than shovel end height H1.
It is understood that the cutting tooth in present embodiment is similar, the most not with the structure of the cutting tooth in such scheme
With being, the main edge of shovel 7 is formed at the non-edge position of end face.Shovel face 8 from the main edge of shovel 7 to this main edge of shovel 7 in the angle of 180 degree
The wall of matrix 21 extend and formed, it is to be understood that shovel face 8 is formed as shoveling into the end face in portion or shovels one of the end face into portion
Part.It can also be appreciated that the main edge of shovel 7 can be the part on the top of the first side 9, this main edge of shovel 7 and rock stratum
Contact area is little, in the case of the rock stratum of cutting condition of equivalent thickness, cutting pressure can be kept constant or have the least change
Change.Further, since the main edge of shovel 7 is little with the contact area of rock stratum, makes this main edge of shovel 7 easily shovel into rock stratum and be split rock stratum, carry
High cutting speed.
It is understood that shovel face 8 can be arbitrary structures, can be internal to matrix 21 such as but not limited to shovel face 8
The concave surface of depression or the convex surface prominent to matrix 21 outside.With continued reference to Fig. 1 to Fig. 3, as one embodiment of the present invention, its
Middle shovel face 8 forms for curved surface or be connected with each other by multiple planes.The shovel face 8 that one embodiment of the present invention provides is to evagination
The convex surface gone out, this convex surface can have multiple have different tilt slope plane connect and formed, the present invention claims had by multiple
It is multistage face that the plane of different inclination slopes connects the face formed, as shown in Figure 3 so that the main edge of shovel 7 is to shovel the top into portion.Can
To be understood by, shovel face 8 can be curved surface outwardly, it is also possible to for the curved surface caved inward, it is also possible to for caving inward
Multistage face, it is also possible to for multistage face outwardly.Cutting tooth can be there to be various structures form, such as but not limited to cutting tooth
It can be the vertical toothing of cone.
With continued reference to Fig. 1 to Fig. 3, as one embodiment of the present invention, wherein shovel and also include the second side 10 He into portion
3rd side 11, the second side 10 is the first angle with the bottom surface of matrix 21；3rd side 11 is second with the bottom surface of matrix 21
Angle；Second side 10 and the 3rd spaced setting in side 11 and lay respectively at the both sides in shovel face 8, as shown in Figure 1.Second side
Face 10 and the 3rd side 11 extend to the wall of matrix 21 from the non-edge position in shovel face 8 and are formed, such as but not limited to, the second side
Face 10 and the 3rd side 11 are respectively the plane from the shovel downward-sloping extension in face 8, so that between shovel face 8 and the second side 10
Between junction and shovel face 8 and the 3rd side 11, junction is respectively formed with minor cutting edge.It is understood that the first angle
Acute angle can be respectively with the second angle.When cutting tooth work, two minor cutting edges are also participated in cutting, thus are accelerated cutting
Speed.
During using this cutting tooth, the main edge of shovel 7 contacts with rock stratum, and along with constantly abrasion, shovel heights of roofs H2 is becoming
Little, the position of the main edge of shovel 7 is then moved along shovel face 8 to the shovel end.Owing to both sides, shovel face 8 have the second side 10 and the 3rd side
11, the length of the most main edge of shovel 7 can keep identical with original state, or length varies less.Such that it is able to keep main shovel
Sword 7 and rock stratum have less contact area, and in whole working angles, drilling pressure can keep constant, and cut tooth tool
There is higher cutting speed, extend the service life of cutting tooth.
With reference to Fig. 2, as one embodiment of the present invention, wherein shovel heights of roofs H2 is in the range of 5mm≤H2≤20mm, shovel
End height is in the range of 3mm≤H1≤18mm.
Fig. 4 is the front view according to a kind of PDC drill bit shown in an illustrative embodiments.Fig. 5 is exemplary according to one
The top view of a kind of PDC drill bit shown in embodiment.Fig. 6 is according to a kind of PDC drill bit shown in an illustrative embodiments
Profile.Fig. 7 is the side drift angle of the cutting tooth according to a kind of PDC drill bit shown in an illustrative embodiments.Fig. 8 is basis
The negative rake of the cutting tooth of a kind of PDC drill bit shown in one illustrative embodiments.
With reference to Fig. 4 to Fig. 8, as another aspect of the present invention, the present invention provides a kind of PDC drill bit, this PDC drill bit bag
Include: drill body 1, drill body 1 can be those skilled in the art it is conceivable that any materials constitute, such as but not limited to
Drill body 1 is constituted for steel body.This drill body 1 can be those skilled in the art it is conceivable that version, such as but
Being not limited to cylindrical structure, as shown in Figure 4 and Figure 5, the nominal diameter of this drill body 1 is 127mm to 431.8mm, or
It can be 5 inches to 17 inches.The PDC drill bit that the present invention provides also includes the cutting tooth being arranged on drill body 1.Wherein,
Cutting tooth includes: be arranged at the main cutting tooth 2 of the end face of the bizet of drill body 1, the cutting that main cutting tooth 2 provides for the present invention
Tooth；Gauge teeth 4 on the outer peripheral face of the bizet being arranged at drill body 1, this gauge teeth 4 for protect bizet outer peripheral face in case
Only come in contact with rock stratum and worn and torn.Gauge teeth 4 can have those skilled in the art it is conceivable that version, such as
But it is not limited to semi-cylindrical structure or semicircular planform structure.
With continued reference to Fig. 4 to Fig. 6, as one embodiment of the present invention, wherein PDC drill bit also includes cutting wing 5, cuts
The sharpener wing 5 extends from the end face of the bizet of drill body 1 to the outer peripheral face of the bizet of drill body 1, main cutting tooth 2 and gauge teeth
4 are respectively arranged on cutting wing 5.Cutting wing 5 can have 3 to 8, has 5 in the embodiment that the present invention provides
Cutting wing 5, as shown in Figure 5.The quantity of the main cutting tooth 2 on each cutting wing 5 can be configured, such as required
But being not limited on each cutting wing 5 can be at least provided with 3 main cutting tooth 2.
The setting direction of main cutting tooth 2 and cutting direction and the cutting angle of PDC drill bit of angle and PDC drill bit are set
Spending relevant, with reference to Fig. 7 and Fig. 8, as one embodiment of the present invention, wherein main cutting tooth 2 has lateral deviation on cutting wing 5
Angle γ or negative rake β, side drift angle γ or negative rake β are in the range of 0 ° of ＜ γ≤20 °, 0 ° of ＜ β≤20 °.It is understood that
The embodiment that the present invention provides is that the bottom surface of the matrix 21 of main cutting tooth 2 is arranged in drill body 1, as shown in Figure 5.
Amount of heat can be produced, in order to avoid this amount of heat life-span to PDC drill bit during PDC drill bit works
Impacting, as one embodiment of the present invention, wherein PDC drill bit also includes tank, and tank can be arranged at adjacent cutting
Between the sharpener wing 5, it is also possible to be provided with nozzle 6 in the sink, nozzle 6 connects with water source.It is understood that nozzle 6 is permissible
Connected with water source by conduit, it is also possible to water cavity is set in the matrix 21 of this PDC drill bit, with reference to shown in Fig. 4, nozzle 6 with should
Water cavity connects.The quantity of nozzle 6 can be relevant with the rotary speed of the working environment of PDC drill bit and PDC drill bit, can basis
Need arbitrarily selected, can have 4 to 18 such as but not limited to nozzle 6.
With reference to Fig. 4 and Fig. 6, as one embodiment of the present invention, wherein cutting wing 5 includes: from bizet near
The angular range of the bottom surface of the first straightway that direction extends, this first straightway and matrix 21 is diagonally gone up in heart position to edge
Being 0 ° to 45 °, the first straightway has by antermarginal tail end；The second straight line extended to the bottom of bizet from the end face of bizet
Section, i.e. it is understood that the second straightway downwardly extends from the end face of bizet, the second straightway and the central axis of matrix 21
Parallel, the second straightway has head end, and head end is near end face；It is arranged at tail end and the head end of the second straightway of the first straightway
Between arc section, arc section is outwardly.The radius of arc section can be the arbitrary dimension needed, such as but not limited to radius
For the arbitrary value between 0mm to 90mm.
With continued reference to Fig. 4 and Fig. 6, as one embodiment of the present invention, wherein PDC drill bit also includes protecting tooth 3, protection
Tooth 3 is arranged between main cutting tooth 2 and gauge teeth 4.In the embodiment that the present invention provides, protection tooth 3 is disposed in proximity to
The lower section of the main cutting tooth 2 of gauge teeth 4, this protection tooth 3 can be cylinder contrate.Protection tooth 3 can be on each cutting wing 5
Quantity can be 0 to 1.
The PDC drill bit of the present invention, with side drift angle γ or negative rake β in the range of 0 ° of ＜ γ≤20 °, 0 ° of ＜ β≤20 °
Mode is arranged, so that the rock stratum being cut is by bigger local pressure, carg is relatively big, thus more conducively current are clear
Wash.It addition, the volume of the volume ratio plane teeth of the prior art of the glomerocryst layer of the PDC drill bit of present invention offer expands one times
Above, so that the shearing force that anti-transverse vibration and convolution rotate is greatly improved, drilling life of bit is therefore extended.Due to this
The main cutting tooth 2 of the PDC drill bit that invention provides is less with the contact area of rock stratum, has same drilling pressure at PDC drill bit
In the case of, cutting pressure is relatively big, such that it is able to the stratum that cutting is harder, the most just expands the range of PDC drill bit.
Feature, structure or characteristic described in the invention can be combined in one or more enforcement in any suitable manner
In mode.In the following description, it is provided that many details thus be given and embodiments of the present invention fully understood.So
And, it will be appreciated by persons skilled in the art that and can put into practice technical scheme and there is no in described specific detail
Or more, or other method, assembly, material etc. can be used.In other cases, it is not shown in detail or describes known knot
Structure, material or operation are to avoid fuzzy each aspect of the present invention.
Claims (13)
1. a cutting tooth, it is characterised in that described cutting tooth includes the matrix (21) of column structure, the end of described matrix (21)
Portion is formed and shovels into portion, and described shovel includes into portion:
First side (9), described first side (9) extends along the wall of described matrix (21)；
The main edge of shovel (7), the described main edge of shovel (7) is a part for described first side (9)；
Shovel face (8), described shovel face (8) from the described main edge of shovel (7) to the wall of the described matrix (21) relative with the described main edge of shovel (7)
Face tilts to extend,
Wherein said shovel face (8) has shovel top and the shovel end, and described in described shovel apex distance, the distance of the bottom surface of matrix (21) is that shovel is risen
Degree (H2), the distance of bottom surface away from described matrix (21) at the bottom of described shovel is shovel end height (H1), and described shovel heights of roofs (H2) is more than
Height (H1) at the bottom of described shovel.
2. a cutting tooth, it is characterised in that described cutting tooth includes the matrix (21) of column structure, the end of described matrix (21)
Portion is formed and shovels into portion, and described shovel includes into portion；
First side (9), described first side (9) extends along the wall of described matrix (21)；
Shovel face (8), described shovel face (8) from the wall of the described matrix (21) relative with described first side (9) to described first
Side (9) tilts to extend, and to form a tip with seamed edge near described first side (9) place, described seamed edge is main
The edge of shovel (7),
Wherein said shovel face (8) has shovel top and the shovel end, and described in described shovel apex distance, the distance of the bottom surface of matrix (21) is that shovel is risen
Degree (H2), the distance of bottom surface away from described matrix (21) at the bottom of described shovel is shovel end height (H1), and described shovel heights of roofs (H2) is more than
Height (H1) at the bottom of described shovel.
Cut tooth the most as claimed in claim 1 or 2, it is characterised in that described shovel face (8) is curved surface or mutual by multiple planes
Connect composition.
Cut tooth the most as claimed in claim 3, it is characterised in that described shovel also includes into portion:
Second side (10), described second side (10) is the first angle with the bottom surface of described matrix (21)；
3rd side (11), described 3rd side (11) is the second angle with the bottom surface of described matrix (21)；
Described second side (10) and described 3rd side (11) spaced setting and lay respectively at described shovel face (8) both sides.
Cut tooth the most as claimed in claim 1 or 2, it is characterised in that described shovel heights of roofs (H2) in the range of 5mm≤H2≤
20mm, at the bottom of described shovel, height (H1) is in the range of 3mm≤H1≤18mm.
Cut tooth the most as claimed in claim 1 or 2, it is characterised in that on the described outer surface shoveling portion, be provided with glomerocryst layer.
7. a PDC drill bit, it is characterised in that described PDC drill bit includes:
Drill body (1)；
Cutting tooth, described cutting tooth is arranged on described drill body (1)；
Wherein, described cutting tooth includes:
Main cutting tooth (2), described main cutting tooth (2) is cut for the cutting tooth as according to any one of claim 1 to 5, described master
Cut the end face that tooth (2) is arranged at the bizet of described drill body (1)；
Gauge teeth (4), described gauge teeth (4) is arranged at the outer peripheral face of the bizet of described drill body (1).
8. PDC drill bit as claimed in claim 7, it is characterised in that described PDC drill bit also includes cutting wing (5), described in cut
The sharpener wing (5) extends from the end face of the bizet of described drill body (1) to the outer peripheral face of the bizet of described drill body (1), institute
State main cutting tooth (2) and described gauge teeth (4) is respectively arranged on described cutting wing (5).
9. PDC drill bit as claimed in claim 8, it is characterised in that described main cutting tooth (2) is on described cutting wing (5)
Having side drift angle or negative rake, wherein said side drift angle is γ, and described negative rake is β, described side drift angle and described negative rake
Scope is: 0 ° of ＜ γ≤20 °, 0 ° of ＜ β≤20 °.
10. PDC drill bit as claimed in claim 8, it is characterised in that described PDC drill bit also includes tank, and described tank is arranged
Between adjacent described cutting wing (5), being provided with nozzle (6) in described tank, described nozzle (6) connects with water source.
11. PDC drill bit as claimed in claim 8, it is characterised in that described cutting wing (5) including:
First straightway, described first straightway diagonally to edge from the close center of described bizet direction extend,
Described first straightway has tail end, and described tail end is near described edge；
Second straightway, described second straightway extends from the described end face of described bizet to the bottom surface of described bizet, and described the
Two straightways and the centerline axis parallel of described matrix (21), described second straightway has head end, and described head end is near described
End face；
Arc section, described arc section is arranged at described tail end and the described head end of described second straightway of described first straightway
Between, described arc section outwardly, the angle of the bottom surface of described first straightway and described matrix (21)It it is 0 °-45 °.
12. PDC drill bit as according to any one of claim 7 to 11, it is characterised in that described PDC drill bit also includes protection
Tooth (3), described protection tooth (3) is arranged between described main cutting tooth (2) and described gauge teeth (4).
13. PDC drill bit as according to any one of claim 7 to 11, it is characterised in that described gauge teeth (4) is semicolumn
Face structure or semicircular planform structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610411220.2A CN105927157B (en) | 2016-06-08 | 2016-06-08 | Cutting tooth and the PDC drill bit with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610411220.2A CN105927157B (en) | 2016-06-08 | 2016-06-08 | Cutting tooth and the PDC drill bit with it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105927157A true CN105927157A (en) | 2016-09-07 |
| CN105927157B CN105927157B (en) | 2017-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610411220.2A Active CN105927157B (en) | 2016-06-08 | 2016-06-08 | Cutting tooth and the PDC drill bit with it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105927157B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763774A (en) * | 2019-03-21 | 2019-05-17 | 莱州市原野科技有限公司 | PDC drill bit and its cutting tooth |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080289881A1 (en) * | 2007-05-23 | 2008-11-27 | Yuelin Shen | Fixed cutter bit partial blade connection at bit center |
| CN104196458A (en) * | 2014-08-26 | 2014-12-10 | 莱州市原野科技有限公司 | Sharp-tooth PDC drill bit |
| CN204782782U (en) * | 2015-06-12 | 2015-11-18 | 江汉石油钻头股份有限公司 | Circle, mixed tooth PDC drill bit of wedge |
-
2016
- 2016-06-08 CN CN201610411220.2A patent/CN105927157B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080289881A1 (en) * | 2007-05-23 | 2008-11-27 | Yuelin Shen | Fixed cutter bit partial blade connection at bit center |
| CN104196458A (en) * | 2014-08-26 | 2014-12-10 | 莱州市原野科技有限公司 | Sharp-tooth PDC drill bit |
| CN204782782U (en) * | 2015-06-12 | 2015-11-18 | 江汉石油钻头股份有限公司 | Circle, mixed tooth PDC drill bit of wedge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105927157B (en) | 2017-10-20 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of invention: Cutting tooth and PDC bit with it Effective date of registration: 20211209 Granted publication date: 20171020 Pledgee: Laizhou Jinhui Financing Guarantee Co.,Ltd. Pledgor: LAIZHOU YUANYE SCIENCE AND TECHNOLOGY Co.,Ltd. Registration number: Y2021980014419 |
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Date of cancellation: 20221009 Granted publication date: 20171020 Pledgee: Laizhou Jinhui Financing Guarantee Co.,Ltd. Pledgor: LAIZHOU YUANYE SCIENCE AND TECHNOLOGY Co.,Ltd. Registration number: Y2021980014419 |