CN208203139U - A kind of circular arc column support type drill bit - Google Patents
A kind of circular arc column support type drill bit Download PDFInfo
- Publication number
- CN208203139U CN208203139U CN201820824189.XU CN201820824189U CN208203139U CN 208203139 U CN208203139 U CN 208203139U CN 201820824189 U CN201820824189 U CN 201820824189U CN 208203139 U CN208203139 U CN 208203139U
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- column
- bit
- drill bit
- central body
- circular arc
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Abstract
The utility model provides a kind of circular arc column support type drill bit, including bit central body, the bit matrix extended downwardly from the bottom end of bit central body, the top surface of bit central body is equipped with multiple edge wings and at least one center wing, edge wing includes: the first column and first level column, the top of first column is fixedly connected with one end of first level column, the bottom end of first column is fixed on the roof of bit central body, and the axis of the first column is parallel with the axis of bit central body；Center wing includes: the second column and the second horizontal column, and the structure of center wing is identical as the structure of edge wing；The height of second column is higher than the height of the first column, and first level column and the second horizontal column are towards the direction of rotation of drill bit.Second column is arranged at middle part, so that the circular arc column support type drill bit of the utility model at drilling hard rock stratum, has the advantages that Cutting free, stability are strong, guiding performance is good the utility model.
Description
Technical field
The utility model relates to PDC drill bit field more particularly to a kind of circular arc column support type drill bits.
Background technique
The full name of PDC drill bit is man-made polycrystalline diamond compact bit, man-made polycrystalline diamond composite sheet it by two layers
Composition, one layer is polycrystalline diamond cutting lay (a kind of artificial superhard material)；Another layer is alloy (tungsten carbide) substrate layer.PDC
Drill bit is to be embedded in drilling bit steel body (or being welded in bit matrix) and a kind of manufactured cutting type brill with composite polycrystal-diamond
Head, it is using composite polycrystal-diamond as cutting edge, with negative angle of cutting edge cut mode fractured rock.
Because PDC drill bit can obtain high drilling speed under low bit pressure, in actual use, PDC drill bit is in addition to conventional drilling straight-hole, also
Suitable in easily tiltedly area's drilling straight-hole and horizontal drilling.However, PDC drill bit guiding performance is bad, suitable bottom need to usually be cooperated to bore
Tool could in the easily tiltedly low bit pressure in area drilling,
In view of this, it is necessary to PDC drill bit in the prior art be improved, to solve the above problems.
Summary of the invention
The purpose of this utility model is to provide a kind of circular arc column support type drill bits, by the way that the height of the second column to be arranged to
Higher than the height of the first column, the second column is located at middle part, and the 2nd PDC cutting tooth in drilling on the second column can be cut
Rock stratum, and guiding role can be played.
Realize that the technical solution of the utility model aim is as follows:
A kind of circular arc column support type drill bit, including bit central body, the drill bit base extended downwardly from the bottom end of bit central body
The top surface of body, the bit central body is equipped with multiple edge wings and at least one center wing, and multiple edge wings are equal
Even distribution, the center wing are located at the inside of edge wing, and the edge wing includes: the first column and first level column,
The top of first column is fixedly connected with one end of first level column, and the bottom end of first column is fixed on bit central
On the roof of body, the axis of first column is parallel with the axis of bit central body；
The center wing includes: the second column and the second horizontal column, structure and the edge wing of the center wing
Structure is identical；
The height of second column is higher than the height of the first column, each first level column, each described second
Direction of rotation when the cutting profile that horizontal column is formed is crept into drill bit is consistent.
The bit matrix is equipped with spiral helicine chip removal band, the chip removal as a further improvement of the utility model,
The side wall of band forms spiral wall, forms the helical flute for landwaste to be discharged between two adjacent spiral walls.
The chip removal band is two as a further improvement of the utility model, and two chip removal bands are parallel and equidistant
It is distributed on bit matrix, forms chip space between two chip removal bands.
The junction of the peripheral wall of the first level column and front end face is equipped with the as a further improvement of the utility model,
One PDC cutting tooth, the peripheral wall of second horizontal column and the junction of front end face are equipped with the 2nd PDC cutting tooth, the first PDC
Cutting tooth, the 2nd PDC cutting tooth are towards bit direction.
The helical angle of the helical flute is 20 ° -45 ° as a further improvement of the utility model,.
As a further improvement of the utility model, the first level column, the second horizontal column peripheral wall on be equipped with ring
Shape chip space, the ring-type chip space are connected to helical flute.
Compared with prior art, the utility model has the beneficial effects that
The utility model is set the second column by the way that the height of the second column to be disposed above to the height of the first column
Set at middle part so that the circular arc column support type drill bit of the utility model is at drilling hard rock stratum, have Cutting free, stability it is strong,
The good advantage of guiding performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of circular arc column support type drill bit.
Fig. 2 is the structural schematic diagram of edge wing.
Fig. 3 is the structural schematic diagram of center wing.
In figure: 1, bit central body；2, bit matrix；3, edge wing；31, first level column；32, the first column；
33, the first PDC cutting tooth；4, center wing；41, the second horizontal column；42, the second column；43, the 2nd PDC cutting tooth.
Specific embodiment
The utility model is described in detail in each embodiment shown in reference to the accompanying drawing, but it should be stated that,
These embodiments are not limitation of the utility model, those of ordinary skill in the art according to these embodiments made by function
Energy, method or equivalent transformation or substitution in structure, belong within the protection scope of the utility model.
It is plane to solve traditional circular arc column support type drill bit wing, resistance is big when drilling, not free machining, drilling is hard
The defect that guiding performance is poor when homogenous rock stratum, stock-removing efficiency is low.It please join shown in Fig. 1, Fig. 1 is the structural schematic diagram of the utility model, this
The circular arc column support type drill bit that embodiment discloses, including bit central body 1, the brill extended downwardly from the bottom end of bit central body 1
Head matrix 2, the top surface of bit central body 1 are equipped with multiple edge wings 3 and at least one center wing 4, and multiple edge wings 3 are
Even distribution, center wing 4 are located at the inside of edge wing 3, as shown in Fig. 2, edge wing 3 includes: the first column 32 and first
The top of horizontal column 31, the first column 32 is fixedly connected with one end of first level column 31, and the bottom end of the first column 32 is fixed on
On the roof of bit central body 1, the axis of the first column 32 is parallel with the axis of bit central body 1；As shown in figure 3, center cutter
The wing 4 includes: the second column 42 and the second horizontal column 41, and the structure of center wing 4 is identical as the structure of edge wing 3；Second is vertical
The height of column 42 is higher than the height of the first column 32, and first level column 31 and the second horizontal column 41 are towards the rotation side of drill bit
To.
The height of second column 42 by being disposed above the height of the first column 32 by the present embodiment, and by the second column
42 are arranged at middle part, at drilling hard rock stratum, the 2nd PDC cutting tooth 43 on center wing 4 are first contacted rock stratum, drill bit exists
In rotary course, the 2nd PDC cutting tooth 43 first cuts rock stratum, and subsequent first PDC cutting tooth 33 cuts rock stratum again, passes through center cutter
The guiding role of the wing 4 is particularly suitable for cutting hard rock stratum so that circular arc column support type drill bit stability in drilling is more preferable.?
When drilling hard rock stratum, have the advantages that Cutting free, stability are strong, guiding performance is good.
The present embodiment is higher than edge wing 3 by center wing 4, and the guiding performance in drilling of center wing 4 is good, reduces whole
Resistance when a bit cutting has the advantages that Cutting free, guiding performance are good.
PDC drill bit is the abbreviation of polycrystalline diamond compact bit, and PDC drill bit is using diamond and hard alloy substrate
The composite material of composition has the characteristics that hardness is high, wearability is strong.The drill bit is a kind of geological drilling industry commonly spudder
Tool.Existing PDC drill bit is roughly divided into two kinds of designs, and one is two wing of small size, double-cone bit, another kind is slightly larger ruler
Very little three wings, tricone bit.The design of these drill bits is based on four wings and six wing PDC drill bits, and the position of secondary wing
Then substituted by the gear wheel of short size.In this way, the center of wellbore is to complete broken rock by the PDC cutting tooth being located on the operator wing
, and the drilling of wellbore peripheral part is completed jointly by the cutting tooth on gear wheel and wing, the broken rock difficulty of wellbore peripheral part
Higher, rock breaking efficiency depends primarily on the cooperation of gear wheel and wing.
In order to overcome existing drill bit to lack the defect that chip removal mechanism causes drilling efficiency low, the circular arc pillar of the present embodiment
It is additionally provided with chip removal mechanism on type drill bit, it, just can be very easily with drilling rod cooperation by opening up helical flute on bit matrix 2
The landwaste of bottom hole is easily discharged out of the hole.
When drilling, PDC drill bit deepens formation pore constantly in bit pressure and cutting broken rock under torque effect, the base of drill bit movement
This form is to be rotated down.Bit central moves downward, and speed is exactly drilling speed when creeping into.The fortune of each cutting tooth of drill bit
Dynamic is in spatially spiral shape track, speed depend on the rotation speed of drill bit and the cutting tooth away from bit central at a distance from.In pole
When creeping into soft high-ductility stratum, cutting tooth wedging rock under bit pressure effect, rotary drilling-head will be such that rock before sword generates
Continuous Plastic Flow and in the form of sheets, stratiform and be cut off.
When PDC drill bit is crept into moulding viviparous stratum, the cutting tooth of PDC drill bit wedging rock under the action of bit pressure,
It collides under torque effect prior to the rock before sword, as drill bit rotates, cutting tooth squeezes rock before sword, and generates small shearing
It destroys.When torque increases, cutting tooth continues to push ahead rock before crushing sword, and is in powder by the crushing of part rock.Work as torsion
When power increases to the strength degree of rock, the shearing-crushing of bulk occurs along shear surface for rock, and hereafter the torsion of cutting tooth is unexpected
It reduces, and then as drill bit rotates, cutting tooth will collide with rock, squeeze, shear 3 kinds of rock break-off process again, in this way
The process that be exactly PDC drill bit creep into moulding viviparous stratum is repeated.
The chip removal mode that the present embodiment uses is: drilling band being arranged on bit matrix 2, in the peripheral wall of bit central body 1
Helical blade is arranged in upper setting chip removal band on drilling rod, and the landwaste that PDC cutting tooth is cut is first through chip removal band again through drilling band
It is discharged finally by helical blade.The present embodiment on bit matrix 2 by being arranged helical flute, and augers is at work
Have the advantages that deslagging is unobstructed.Helical flute is arranged simultaneously on bit central body 1, bit matrix 2, drilling rod in the present embodiment,
The rock stratum that PDC cutting tooth is cut directly gradually is conveyed through helical flute backward, until being easily discharged out of the hole, drill bit is constantly broken
Rock, drilling rod obtain higher drilling efficiency with regard to continuous discharging slag.
It is preferred that drilling band is one, along the circumferential direction setting of bit matrix 2, formed between two adjacent spiral walls for arranging
The helical flute of landwaste out, certainly, when cuttings chip is smaller, can by it is axial be set in parallel two, three even
More drilling bands.
It is preferred that chip removal band is one, along the circumferential direction setting of bit central body 1, is formed and be used between two adjacent spiral walls
The helical flute of landwaste is discharged.It is preferred that bit central body 1 is pyramidal structure, the big end and bit matrix 2 of bit central body 1 connect
It connects, wing is set on the small end end face of bit central body 1.On the bit central body 1 of pyramidal structure, helicla flute is from depth to shallow shape
At, meanwhile, chip removal band outer diameter is formed from big to small, thus is convenient for the compression of landwaste, conducive to the transport of landwaste whole process.When
So, when cuttings chip is smaller, two, three even more chip removal bands can be set in parallel by axial.
When being drilled, helical form drilling rod rotates in hole, and helical form drilling rod and hole wall constitute a helical feed
Device, bottom hole landwaste are just gradually conveyed by the helical blade on drilling rod backward, until being easily discharged out of the hole.
Usually, folded between the tangent line of circular helix and the cylindrical surface straight edge line for passing through point of contact on cylindrical surface
Acute angle, referred to as helical angle.It is folded between the tangent line of conical spiral and the circular conical surface straight edge line for passing through point of contact on circular conical surface
Acute angle, referred to as helical angle.The helical angle of helical flute is 20 ° -45 ° in the present embodiment.When the helical angle of helical flute
When selecting 45 °, 45 ° of helical angle chip spaces are big, and rigidity is good but good without the chip removal performance of 20 ° of helical angles；Helical flute
When helical angle selects 20 °, 20 ° of helical angle chip removal better performances, but chip space is limited, and rigidity is bad.In actual use,
It is preferred that the helical angle of helical flute is 30 °.The augers of the present embodiment is suitble to middle low speed feeding.
In actual use, preferably the outer diameter of bit central body 1 be greater than bit matrix 2 outer diameter, the week of bit central body 1
Multiple chip spaces are uniformly arranged on wall, chip space is plane.Since the landwaste of bottom hole can quickly be discharged, landwaste will not heap in bottom hole
Product, so that PDC cutting tooth can directly contact rock stratum drilling at work, augers is fast with drilling progress, drilling resistance is small
The advantages of.
The present embodiment by being arranged helical flute, PDC cutting simultaneously on bit central body 1, bit matrix 2, drilling rod
The rock stratum that tooth is cut directly gradually is conveyed through helical flute backward, until being easily discharged out of the hole, the continuous broken rock of drill bit, drilling rod is just
Continuous discharging slag obtains higher drilling efficiency.
Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model
Body explanation, they are all without departing from made by the utility model skill spirit not to limit the protection scope of the utility model
Equivalent implementations or change should be included within the scope of protection of this utility model.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. a kind of circular arc column support type drill bit, including bit central body (1), the brill extended downwardly from the bottom end of bit central body (1)
Head matrix (2), the top surface of the bit central body (1) is equipped with multiple edge wings (3) and at least one center wing (4), more
A edge wing (3) is uniformly uniformly distributed, and the center wing (4) is located at the inside of edge wing (3), and feature exists
In, the edge wing (3) include: the first column (32) and first level column (31), the top of first column (32) with
One end of first level column (31) is fixedly connected, and the bottom end of first column (32) is fixed on the roof of bit central body (1)
On, the axis of first column (32) is parallel with the axis of bit central body (1)；
The center wing (4) includes: the second column (42) and the second horizontal column (41), the structure of the center wing (4) with
The structure of edge wing (3) is identical；
The height of second column (42) is higher than the height of the first column (32), each first level column (31), each
Direction of rotation when the cutting profile that second horizontal column (41) is formed is crept into drill bit is consistent.
2. circular arc column support type drill bit as described in claim 1, which is characterized in that the bit matrix (2) is equipped with helical form
Chip removal band, the side wall of the chip removal band forms spiral wall, forms the spiral shell for landwaste to be discharged between two adjacent spiral walls
Revolve chip space.
3. circular arc column support type drill bit as claimed in claim 2, which is characterized in that the chip removal band is two, two chip removal bands
Parallel and equidistantly distributed forms chip space between two chip removal bands on bit matrix (2).
4. circular arc column support type drill bit as described in any one of claims 1-3, which is characterized in that the first level column (31)
The junction of peripheral wall and front end face is equipped with the first PDC cutting tooth (33), the peripheral wall of second horizontal column (41) and front end face
Junction is equipped with the 2nd PDC cutting tooth (43), and the first PDC cutting tooth (33), the 2nd PDC cutting tooth (43) are towards drill bit
Direction of rotation.
5. circular arc column support type drill bit as claimed in claim 2 or claim 3, which is characterized in that the helical angle of the helical flute is
20°-45°。
6. circular arc column support type drill bit as described in claim 1, which is characterized in that the first level column (31), the second level
It is equipped with cyclic annular chip space on the peripheral wall of column (41), which is connected to helical flute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820824189.XU CN208203139U (en) | 2018-05-30 | 2018-05-30 | A kind of circular arc column support type drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820824189.XU CN208203139U (en) | 2018-05-30 | 2018-05-30 | A kind of circular arc column support type drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208203139U true CN208203139U (en) | 2018-12-07 |
Family
ID=64516047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820824189.XU Expired - Fee Related CN208203139U (en) | 2018-05-30 | 2018-05-30 | A kind of circular arc column support type drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208203139U (en) |
-
2018
- 2018-05-30 CN CN201820824189.XU patent/CN208203139U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181207 Termination date: 20210530 |
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| CF01 | Termination of patent right due to non-payment of annual fee |