CN209212160U - It is novel to bore PDC cutter composite drill bit again - Google Patents
It is novel to bore PDC cutter composite drill bit again Download PDFInfo
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- CN209212160U CN209212160U CN201822038546.2U CN201822038546U CN209212160U CN 209212160 U CN209212160 U CN 209212160U CN 201822038546 U CN201822038546 U CN 201822038546U CN 209212160 U CN209212160 U CN 209212160U
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Abstract
The utility model discloses a kind of novel cone PDC cutter composite drill bits again, it includes bit body and the circumferential palm and PDC wing being disposed in an evenly spaced relation on the bit body, along drill bit, axially free end bearing outstanding is sealedly connected with gear wheel to the palm, and the bizet of the PDC wing is equipped with PDC cutting tooth；Wherein, the palm is greater than PDC wing along the length of the axially projecting extension of drill bit along the length of the axially projecting extension of drill bit, and gear wheel is less than the PDC cutting tooth working surface diameter radially projecting along drill bit along the radially projecting working surface diameter of drill bit, therefore, the novel torque for boring PDC cutter composite drill bit again is between rock bit and PDC drill bit, and it is compared with conventional PDC drill bit, it is more conducive to stablizing drilling, it is used suitable for directional well in hold angle and deflecting, especially in soft or hard alternate interlayer, in gravel class interlayer stratum, it is with preferable ground adaptability and drilling controllability.
Description
Technical field
The utility model relates to petroleum drilling technology fields, and in particular to a kind of novel cone PDC cutter composite drill bit again.
Background technique
With going deep into for oil-gas mining, so that the reservoir media of remaining oil is more complicated, original homogeneous class stratum is increasingly
It reducing, the inhomogeneous formations such as soft or hard interlayer, gravel class interlayer are increasing, and in drilling process, reduce drill bit unit drilling depth
The main influence factor of cost is exactly the service life of drill bit rate of penetration and drill bit.
The extensive PDC drill bit of scene use scope and rock bit are not able to satisfy the above inhomogeneous formation generally at present
Drilling, and chip hold down effect, mud drum phenomenon, rock bit be easy failure, PDC drill bit cutting tooth be easy to happen brittle fracture with
And torque it is big phenomena such as restrict conventional bit in the application of inhomogeneous formation, therefore, need to research and develop one kind can be suitable for it is non-
Homogeneous formation and the high new drill of service life long rate of penetration adapt to the requirement of site operation.
Utility model content
The utility model aims at the problems existing in the prior art, and provides a kind of novel cone PDC cutter composite drill bits again, solve
Existing PDC drill bit and rock bit are not able to satisfy the technical issues of above inhomogeneous formation drilling.
In order to solve the above technical problems, the utility model provides a kind of novel cone PDC cutter composite drill bit again comprising bore
Head body and the circumferential palm and PDC wing being disposed in an evenly spaced relation on the bit body, the palm are axially projecting along drill bit
Free end bearing be sealedly connected with gear wheel, the bizet of the PDC wing is equipped with PDC cutting tooth；Wherein, the palm is along drill bit
The length of axially projecting extension is greater than PDC wing along the length of the axially projecting extension of drill bit, i.e., the described gear wheel is axially prominent along drill bit
Cutting plane out protrudes from the PDC cutting tooth along the axial cutting plane outstanding of drill bit, and gear wheel is radially projecting along drill bit
Working surface diameter be less than the PDC cutting tooth working surface diameter radially projecting along drill bit.
Preferably, the PDC blade surface has plated diadust.
Preferably, it is studded on the ring side working face of the gauge body of the PDC wing and is evenly distributed with diamond reinforcement tooth, institute
Diamond is stated to reinforce tooth to protrude from the height of ring side working face being 1.5-3 millimeters.
Preferably, the diamond reinforcement tooth is distributed in by high and low on the ring side working face of the gauge body.
Preferably, the gear wheel includes multistage along the diminishing male cone (strobilus masculinus) of free end orient diameter, every level-one outer cone
Carbide button is evenly distributed on face, and with the diminution of male cone (strobilus masculinus) diameter, the diameter of the carbide button is sequentially reduced.
Preferably, the gear wheel upper end is equipped with gear wheel mounting portion, and the gear wheel mounting portion is mounted on tooth by sealing bearing
Wheel is recessed in the bearing mounting groove of setting on interconnecting piece free end.
Preferably, hollow in the palm to be provided with shoe cream room, the shoe cream room passes through the axis of oil circuit and gear wheel interconnecting piece
Hold mounting groove connection setting.
Preferably, the PDC wing extends radially inwardly and blends in the center point of bit body, and the blending center is equipped with
Central ports.
Preferably, the root of each PDC wing is respectively equipped with circumference hydrophthalmia, and the circumference hydrophthalmia is circle with central ports
The heart is circumferentially distributed on same diameter annulus.
Novel cone PDC cutter composite drill bit again described in the utility model, is formed by two sets of cutting structure Combinatorial Optimizations
Two-stage cutting mode, the ladder-like wellbore after two-stage cutting is coaxial ladder circle cylindricality, and the PDC cutting tooth is in drill bit work
The oscillation crosswise of drill bit can be reduced, and reduce skidding, Ke Yiyou in the counteracting force of the second working face one transverse direction of generation when making
Effect improves the service life of rate of penetration and drill bit, and the novel torque for boring PDC cutter composite drill bit again described in the utility model
Between rock bit and PDC drill bit, and it is more conducive to stablizing drilling, be suitable for compared with conventional PDC drill bit
Directional well is used in hold angle and deflecting, especially in soft or hard alternate interlayer, gravel class interlayer stratum, is had preferable
Ground adaptability and drilling controllability.
Detailed description of the invention
Fig. 1 is the novel main schematic diagram for boring PDC cutter composite drill bit again described in the utility model；
Fig. 2 is the novel bottom view for boring PDC cutter composite drill bit again described in the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The embodiments of the present invention provide a kind of novel bores 4 composite drill bit of PDC cutter again comprising bit body 1 and
4 palm 2 of gear wheel and the PDC wing 3 being circumferentially disposed in an evenly spaced relation on the bit body 1,4 palm 2 of gear wheel is along drill bit shaft
It is sealedly connected with gear wheel 4 to free end bearing outstanding, the bizet of the PDC wing 3 is equipped with PDC cutting tooth 5；Wherein, described
4 palm 2 of gear wheel is greater than PDC wing 3 along the length of the axially projecting extension of drill bit along the length of the axially projecting extension of drill bit, i.e., described
Along drill bit, axially cutting plane outstanding protrudes from the PDC cutting tooth 5 along the axial cutting plane outstanding of drill bit to gear wheel 4, and
Gear wheel 4 is less than the working surface diameter radially projecting along drill bit of PDC cutting tooth 5 along the radially projecting working surface diameter of drill bit.
Two-stage cutting mode is formd by two sets of cutting structure Combinatorial Optimizations, the ladder-like wellbore after two-stage cutting is same
Axis ladder circle cylindricality, and the PDC cutting tooth 5 can be in the counteracting of the second working face one transverse direction of generation in bit operation
Power, reduces the oscillation crosswise of drill bit, and reduces skidding, can effectively improve the service life of rate of penetration and drill bit, and this reality
It is between 4 drill bit of gear wheel and PDC drill bit with the novel novel torque for boring 4 composite drill bit of PDC cutter again, and itself and routine
PDC drill bit compare, be more conducive to stablizing drilling, be used suitable for directional well in hold angle and deflecting, especially soft
In hard alternate interlayer, gravel class interlayer stratum, with preferable ground adaptability and drilling controllability.
Embodiment 1:
It is not able to satisfy the technical issues of above inhomogeneous formation is crept into order to solve existing PDC drill bit and 4 drill bit of gear wheel.
The embodiments of the present invention 1 provide a kind of novel cone 4 composite drill bit of PDC cutter again, as depicted in figs. 1 and 2 comprising drill bit
Body 1,4 palm 2 of gear wheel, PDC wing 3 and gear wheel 4 and PDC cutting tooth 5.
As depicted in figs. 1 and 2,4 palm 2 of gear wheel and PDC wing 3 are circumferentially disposed in an evenly spaced relation in the bit body 1
On, along drill bit, axially free end bearing outstanding is sealedly connected with gear wheel 4 to 4 palm 2 of gear wheel, specifically, the gear wheel 4 connects
Recess is equipped with bearing mounting groove on socket part free end, and 4 upper end of gear wheel is equipped with 4 mounting portion of gear wheel, and 4 mounting portion of gear wheel is logical
It crosses sealing bearing to be mounted in the bearing mounting groove, so as to be freely rotated in 4 palm 2 of gear wheel.
Meanwhile it is hollow in 4 palm 2 of gear wheel be provided with shoe cream room, the shoe cream room passes through oil circuit and 4 interconnecting piece of gear wheel
Bearing mounting groove be connected to setting.During the work time, the vibration of drill bit will lead to swabbing action and the liquid row of Bearing inner
It puts, meanwhile, mud pressure compresses oil sac, enters the lubricating oil in oil sac by oil circuit and lubricates bearing in bearing.
As depicted in figs. 1 and 2, the gear wheel 4 includes multistage along the diminishing male cone (strobilus masculinus) of free end orient diameter, often
Carbide button 41 is evenly distributed on level-one male cone (strobilus masculinus), and with the diminution of male cone (strobilus masculinus) diameter, the diameter of the carbide button 41 successively subtracts
It is small.In order to improve the working performance of carbide button 41, honeycomb structure polycrystalline diamond, wearability and polycrystalline diamond are preferably used
Composite sheet is suitable, and toughness, shock resistance are remarkably reinforced.
The bizet of the PDC wing 3 be equipped with PDC cutting tooth 5, the PDC cutting tooth 5 not only with diamond hardness and
Wearability, and shock resistance and good self-sharpening with cemented carbide material, due to the wearability of polycrystalline diamond
It is far longer than cemented carbide material, makes the abrasion loss of hard alloy be greater than polycrystalline diamond in drilling, make working lining always
Certain exposure amount is kept, therefore PDC cutting tooth 5 has good sharpness.
Abrasion is caused to avoid the problem that generation friction between PDC wing 3 and drilling, 3 surface of the PDC wing packet
Diadust is studded with, further, as shown in Figure 1, studding on the ring side working face of the gauge body 31 of the PDC wing 3
The even diamond that is distributed with reinforces tooth 32, reinforces tooth 32 by the way that diamond is arranged on its surface, is further ensured that gauge body 31 will not
Abrasion, the diamond reinforces tooth 32 to protrude from the height of ring side working face being 1.5-3 millimeters, and preferred, the diamond
Reinforce tooth 32 to be distributed in by high and low on the ring side working face of the gauge body 31, therefore, when the higher diamond of protrusion is reinforced
After tooth 32 is worn, prominent lower diamond, which reinforces tooth 32, to carry out secondary abrasion protection to gauge body 31.
As shown in Fig. 2, the PDC wing 3 extends radially inwardly and blends in the center point of bit body 1, in the blending
The heart is equipped with central ports 6, meanwhile, the root of each PDC wing 3 is respectively equipped with circumference hydrophthalmia 7, and the circumference hydrophthalmia 7 is in
Edema with the heart involved eye 6 is that the center of circle is circumferentially distributed on same diameter annulus, and the circumference hydrophthalmia 7 can be to 4 tooth of gear wheel and PDC cutting tooth
5 carry out forcing cooling and cleaning, so that it is kept higher rate of penetration, the central ports 6 can eject high-pressure jet stream
Body is logical to squeeze into rock microcrack, is formed " water wedge ", expands microcrack, so that rock strength be made to substantially reduce, reach kata-rocks
The purpose of stone.
As shown in Fig. 2, 4 palm 2 of gear wheel is greater than PDC wing 3 along drill bit shaft along the length of the axially projecting extension of drill bit
To the length of prominent extension, i.e., along drill bit, axially cutting plane outstanding protrudes from the PDC cutting tooth 5 along brill to the described gear wheel 4
Axially projecting cutting plane, meanwhile, gear wheel 4 is less than PDC cutting tooth 5 along brill along the radially projecting working surface diameter of drill bit
Radially projecting working surface diameter.
In actual drilling, the impact grinding shaft bottom rock stratum first of gear wheel 4, this is level-one cutting, later PDC cutting tooth 5
Shearing-crushing rock of borehole, this is secondary cutting.Gear wheel 4 can be crushed wellbore central area when work, cooperate with central ports 6
Hydraulic jet impact, so that breaking off a small diameter borehole in advance, and the cutting tooth of gear wheel 4 can impact minor diameter well simultaneously
The borehole wall of eye, so that the rock of borehole of small diameter borehole cracks, rock strength is greatly lowered, so that the second level is cut
The PDC cutting tooth 5 for cutting structure is easier to cut the stratum, (rock at this time after PDC cutting tooth 5 is with cut mode fractured rock
Stone can be cracked, be generated so the landwaste generated slides shearing than only PDC cutting tooth 5 due to being impacted in advance by gear wheel 4
Landwaste it is big), the drilling fluid that circumference hydrophthalmia 7 ejects can be taken away the second cutting face, prevent chip hold down effect and mud drum existing
The generation of elephant.
Ladder-like wellbore after two-stage cutting is coaxial ladder circle cylindricality, so that drilling fluid can generate an equivalent guiding
Angle can effectively reduce local head loss according to fluid mechanics principle.The fillet of ladder junction can reduce drilling fluid in well
Hydraulic loss in the process of circulation reduces the consumption costs of Surface power drive equipment indirectly, and is conducive to bottom-hole cleaning landwaste, into
And improve drilling efficiency.Meanwhile the PDC cutting tooth 5 can generate a transverse direction in the second working face in bit operation
Counteracting force, reduces the oscillation crosswise of drill bit, and reduces skidding.
Two-stage cutting mode is formd by two sets of cutting structure Combinatorial Optimizations, can effectively improve rate of penetration and drill bit
Service life, and it is described in the utility model it is novel again bore 4 composite drill bit of PDC cutter torque be in 4 drill bit of gear wheel and PDC brill
Between head, and it is more conducive to stablizing drilling compared with conventional PDC drill bit, is suitable for directional well in hold angle and deflecting
When use, especially in soft or hard alternate interlayer, gravel class interlayer stratum, with preferable ground adaptability and drilling can
Control property.
Specific embodiment of the present utility model described above does not constitute the restriction to scope of protection of the utility model.
Any other various changes and modifications that any technical concept according to the present utility model is made should be included in practical
In novel scope of protection of the claims.
Claims (9)
1. a kind of novel cone PDC cutter composite drill bit again, which is characterized in that be disposed in an evenly spaced relation in including bit body and circumferentially
Palm and PDC wing on the bit body, along drill bit, axially free end bearing outstanding is sealedly connected with gear wheel to the palm,
The bizet of the PDC wing is equipped with PDC cutting tooth；Wherein, the palm is greater than PDC knife along the length of the axially projecting extension of drill bit
The wing is along the length of the axially projecting extension of drill bit, i.e., along drill bit, axially cutting plane outstanding protrudes from the PDC and cuts the described gear wheel
Tooth is cut along the axial cutting plane outstanding of drill bit, and gear wheel is less than PDC cutting tooth edge along the radially projecting working surface diameter of drill bit
The radially projecting working surface diameter of drill bit.
2. novel according to claim 1 bore PDC cutter composite drill bit again, which is characterized in that the PDC blade surface plates
There is diadust.
3. novel according to claim 1 bore PDC cutter composite drill bit again, which is characterized in that the gauge body of the PDC wing
Ring side working face on stud with and be evenly distributed with diamond and reinforce tooth, the diamond reinforces the height that tooth protrudes from ring side working face
Degree is 1.5-3 millimeters.
4. novel according to claim 3 bore PDC cutter composite drill bit again, which is characterized in that it is high that the diamond reinforces tooth
On the low ring side working face straggly for being distributed in the gauge body.
5. novel according to claim 1 bore PDC cutter composite drill bit again, which is characterized in that the gear wheel includes multistage
Along the diminishing male cone (strobilus masculinus) of free end orient diameter, it is evenly distributed with carbide button on every level-one male cone (strobilus masculinus), and straight with male cone (strobilus masculinus)
The diameter of the diminution of diameter, the carbide button is sequentially reduced.
6. novel according to claim 1 bore PDC cutter composite drill bit again, which is characterized in that the gear wheel upper end is equipped with tooth
Mounting portion is taken turns, the bearing that the gear wheel mounting portion is mounted on the setting that is recessed on gear wheel interconnecting piece free end by sealing bearing is installed
In slot.
7. novel according to claim 6 bore PDC cutter composite drill bit again, which is characterized in that hollow setting in the palm
There is shoe cream room, the shoe cream room is connected to setting with the bearing mounting groove of gear wheel interconnecting piece by oil circuit.
8. novel according to claim 1 bore PDC cutter composite drill bit again, which is characterized in that the PDC wing is radially-inwardly
Extend and blend in the center point of bit body, the blending center is equipped with central ports.
9. novel according to claim 8 bore PDC cutter composite drill bit again, which is characterized in that the root of each PDC wing
It is respectively equipped with circumference hydrophthalmia, the circumference hydrophthalmia is circumferentially distributed on same diameter annulus by the center of circle of central ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822038546.2U CN209212160U (en) | 2018-12-04 | 2018-12-04 | It is novel to bore PDC cutter composite drill bit again |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822038546.2U CN209212160U (en) | 2018-12-04 | 2018-12-04 | It is novel to bore PDC cutter composite drill bit again |
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| Publication Number | Publication Date |
|---|---|
| CN209212160U true CN209212160U (en) | 2019-08-06 |
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| CN201822038546.2U Active CN209212160U (en) | 2018-12-04 | 2018-12-04 | It is novel to bore PDC cutter composite drill bit again |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339709A (en) * | 2018-12-04 | 2019-02-15 | 长江大学 | It is novel to bore PDC cutter composite drill bit again |
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2018
- 2018-12-04 CN CN201822038546.2U patent/CN209212160U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339709A (en) * | 2018-12-04 | 2019-02-15 | 长江大学 | It is novel to bore PDC cutter composite drill bit again |
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