CN206299344U - A kind of PDC drill bit - Google Patents
A kind of PDC drill bit Download PDFInfo
- Publication number
- CN206299344U CN206299344U CN201621431531.7U CN201621431531U CN206299344U CN 206299344 U CN206299344 U CN 206299344U CN 201621431531 U CN201621431531 U CN 201621431531U CN 206299344 U CN206299344 U CN 206299344U
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- China
- Prior art keywords
- drill bit
- pdc drill
- bit body
- joint
- drain ring
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Abstract
The utility model provides a kind of PDC drill bit, is related to Oil-Gas Well Engineering technical field.PDC drill bit includes bit body and the joint being connected with bit body.Bit body circumferentially distributed has multiple cutting wings along its.Bit body has multiple hydrophthalmias, and joint has the liquid guiding cavity connected with each hydrophthalmia.Liquid guiding cavity is communicated with multiple reversely spray orifices, and the direction that each reverse spray orifice is directed away from bit body extends through the side wall of joint, and the axis of each reverse spray orifice intersects with the axis of joint.Multiple reversely spray orifices are set by its joint so that on the one hand the drilling fluid inside the liquid guiding cavity of PDC drill bit can be sprayed by hydrophthalmia, on the other hand can be sprayed by reverse spray orifice.The landwaste for contributing to drilling fluid to carry under bit body is bored returns to ground, debris blockage well is prevented from, so as to improve drilling efficiency.
Description
Technical field
The utility model is related to Oil-Gas Well Engineering technical field, in particular to a kind of PDC drill bit.
Background technology
PDC drill bit, is exactly polycrystalline diamond compact bit.However, PDC drill bit generally uses tungsten carbide or steel body is base
Body, adds binding agent to sinter at high temperature and forms with diamond as raw material.
PDC drill bit is big due to its coal powder quantity of bore, and being cut when wing is bored and turned up the soil layer at it can produce substantial amounts of landwaste, the rock of generation
If bits cannot in time discharge well, easily cause the well being drilled and block.On the one hand, work difficulty is increased；Separately
On the one hand, the damage for causing drilling tool is easily contacted when drill bit and drilling rod exit well with landwaste.
Utility model content
The purpose of this utility model is to provide a kind of PDC drill bit, and it can aid in landwaste and quickly returns to ground.
What embodiment of the present utility model was realized in：
A kind of PDC drill bit, it includes bit body and the joint being connected with bit body.Bit body circumferentially distributed has multiple along its
Cutting wing.Bit body has multiple hydrophthalmias, and joint has the liquid guiding cavity connected with each hydrophthalmia.Liquid guiding cavity is communicated with multiple
Reverse spray orifice, the direction that each reverse spray orifice is directed away from bit body extends through the side wall of joint, each reverse spray orifice
Axis intersects with the axis of joint.
In the utility model preferred embodiment, the above-mentioned side wall for surrounding liquid guiding cavity is peripherally and outwardly recessed to form slow along it
Rush chamber.Cushion chamber is connected with liquid guiding cavity, and each reverse spray orifice is connected with cushion chamber.
In the utility model preferred embodiment, above-mentioned PDC drill bit also includes drain ring.The rotation of drain ring is arranged at slow
Rush chamber.Drain ring is provided with the delivery hole for being connected with reverse spray orifice, side wall of the delivery hole through drain ring.
In the utility model preferred embodiment, above-mentioned delivery hole is provided with multiple.
In the utility model preferred embodiment, the inwall of above-mentioned drain ring is provided with multiple intake chutes so that drain ring
Rotated with bit body identical direction of rotation in the driving lower edge of drilling fluid.Each intake chute is through drain ring away from bit body
Side bottom wall, the bearing of trend of each intake chute is not parallel with the axis of drain ring.
In the utility model preferred embodiment, the depth of the close bit body side of above-mentioned each intake chute is less than to be led
The depth away from bit body side of liquid bath.
In the utility model preferred embodiment, the rotating dress for supporting drain ring is additionally provided with above-mentioned joint
Put.
In the utility model preferred embodiment, above-mentioned whirligig includes that be arranged at buffering cavity wall first is recessed
Groove, it is arranged at drain ring outer wall and in corresponding second groove of the first groove and multiple ball.First groove and the second groove
Mounting groove is formed, multiple balls are rolled and are arranged in mounting groove.
In the utility model preferred embodiment, above-mentioned mounting groove is two, and two mounting grooves are arranged side by side.
In the utility model preferred embodiment, there is wing gap between the above-mentioned two neighboring cutting wing.
Hydrophthalmia is provided with each wing gap.
The beneficial effect of the utility model embodiment is：
Multiple reversely spray orifices are set by its joint so that the drilling fluid one side energy inside the liquid guiding cavity of PDC drill bit
Enough sprayed by hydrophthalmia, on the other hand can be sprayed by reverse spray orifice.Drilling fluid is contributed to carry the landwaste under bit body is bored
Ground is returned to, debris blockage well is prevented from, so as to improve drilling efficiency.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the utility model embodiment, below will be to be used needed for embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
Other related accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is the structural representation of the PDC drill bit that the utility model embodiment one is provided；
Fig. 2 is the first viewing angle constructions schematic diagram of the PDC drill bit that the utility model embodiment one is provided；
Fig. 3 is the second viewing angle constructions schematic diagram of the PDC drill bit that the utility model embodiment one is provided；
Fig. 4 is the cross-sectional view in Fig. 3 along IV-IV direction；
Fig. 5 is the structural representation of the drain ring that the utility model embodiment one is provided；
Fig. 6 is the structural representation of the PDC drill bit that the utility model embodiment two is provided.
Icon：100-PDC drill bits；100a-PDC drill bits；110- bit bodys；111- cuts wing；112- cutting tooths；113-
Wing gap；114- shower nozzles；115- hydrophthalmias；120- joints；120a- joints；121- top connections；122- lower contacts；123- is installed
Portion；The reverse spray orifices of 124-；125- liquid guiding cavities；126- cushion chambers；The grooves of 127- first；130- drain rings；130a- drain rings；
131- delivery holes；132- intake chutes；133- first ports；134- second ports；The grooves of 135- second；136- balls.
Specific embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, is clearly and completely described, it is clear that retouched to the technical scheme in the utility model embodiment
The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Generally described in accompanying drawing herein and
The component of the utility model embodiment for showing can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiment of the present utility model below to providing in the accompanying drawings is not intended to limit requirement
The scope of the present utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further defined and explained in subsequent accompanying drawing.
In description of the present utility model, it is necessary to explanation, term " orientation of instruction such as " center ", " interior ", " outward " or
Position relationship is or the side that the utility model product is usually put when using based on orientation shown in the drawings or position relationship
Position or position relationship, are for only for ease of description the utility model and simplify description, rather than the device for indicating or implying meaning
Or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to of the present utility model
Limitation.Additionally, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that indicating or implying relative importance.
In description of the present utility model, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " sets
Put ", " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected,
Or be integrally connected；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two companies of element internal
It is logical.For the ordinary skill in the art, can understand that above-mentioned term is specific in the utility model with concrete condition
Implication.
First embodiment
Fig. 1 and Fig. 5 is refer to, the present embodiment provides a kind of PDC drill bit 100, and it includes bit body 110, is connected to drill bit
The joint 120 of body 110 and the drain ring 130 being arranged inside joint 120.
Fig. 1 and Fig. 2 is refer to, bit body 110 is the tubing (i.e. the side wall of bit body 110) of cylindrical shape structure, and is justified
The one end of the steel tubing of bar shape is axially extending to its and closes the end (i.e. the roof of bit body 110), the other end
For being connected with joint 120.Bit body 110 is provided with multiple cutting wings 111, and multiple cutting wing 111 is along bit body 110
It is circumferentially distributed.In order to ensure cutting effect, the multiple cutting spiral of wing 111 is arranged at bit body 110.Pushed up positioned at bit body 110
The cutting wing 111 of wall part is turned up the soil layer for cutting drilling, is used to protect positioned at the cutting wing 111 of the sidewall sections of bit body 110
Hold borehole size.One end of each cutting wing 111 is located at the center of annular protrusion, and the other end extends to leaning on for bit body 110
It is bordering on the end being connected with joint 120.Because bit body 110 is cylindrical shape structure, and cutting wing 111 is along bit body 110
It is circumferentially distributed, therefore, PDC drill bit 100 rotate when, its rotational trajectory be circular trace, such that it is able to eliminate polygon impact
Power, so as to improve the service life of PDC drill bit 100.
Bit body 110 can be according to different sizes be arranged to the need for drilling well, such as conventional 5in- of oil field mining site
Arbitrary value between 17in.Cutting wing 111 can be sized to any amount, such as bite according to bit body 110
The wing 111 is 6,7,8 or more, and cutting the quantity difference of wing 111 can't influence the operation principle of PDC drill bit 100,
Herein only as a example by 6.Each cutting wing 111 is provided with multiple cutting tooths 112.Multiple cutting tooths 112 are in cutting wing 111
It is uniformly distributed.Cutting tooth 112 can be set to any amount, example according to the quantity of the size of bit body 110 and cutting wing 111
As each cutting wing 111 is provided with 10,11,12 or more cutting tooths 112.
The one end of cutting tooth 112 be embedded in cutting wing 111 in, the other end stretch out cutting wing 111 formed shovel into
Portion.Shovel and protrude from cutting wing 111 into portion.The extension shoveled into portion of multiple cutting tooths 112 that each cutting wing 111 is provided with
Direction is identical, and the cutting tooths 112 of multiple cutting wings 111 shovel also identical into the bearing of trend in portion.In order to ensure the effect of cutting
Really, so as to reach the requirement of well, cutting tooth 112 can be set according to the quantity of the size of bit body 110 and cutting wing 111
Different size is set to, cutting tooth 112 can also be arranged to various shapes.
For example, cutting tooth 112 be bar shape structure, it can be understood as bar shape structure include cylinder, Elliptic Cylinder and
Rectangle cylinder etc..Cutting tooth 112 includes the side of the second end face of first end face, second end face and connection first end face.
Wherein, the first end face of cutting tooth 112 is embedded into cutting wing 111, and the second end face of cutting tooth 112 protrudes from cutting wing
111 form above-mentioned shovel into portion.
Again for example, cutting tooth 112 is vertebra shape structure, it can be understood as centrum shape structure includes cone, tetrahedron cone
With pentahedron cone etc..Cutting tooth 112 includes end face and is connected with end face and forms the side of the conical surface.Wherein, cutting tooth 112
Side is embedded into cutting wing 111, and the end face of cutting tooth 112 protrudes from cutting wing 111 and forms above-mentioned shovel into portion.
Hold above-mentioned, by setting cutting wing 111 and cutting tooth 112, PDC drill bit 100 can be along circle during rotating
Shape track is drilled to well in stratum.Meanwhile, cutting wing 111 and cutting tooth 112 can form larger coal powder quantity of bore, it is ensured that
The effect of drilling well.
The roof that the inside of bit body 110 has inner chamber, bit body 110 is provided with multiple hydrophthalmias 115 through its roof.Often
Shower nozzle 114 is provided with individual hydrophthalmia 115.I.e. each hydrophthalmia 115 is connected with cavity, and the drilling fluid inside PDC drill bit 100 leads to
Hydrophthalmia 115 is crossed outwards to spray.Specifically.There is wing gap 113, each wing gap between two neighboring cutting wing 111
At least one hydrophthalmia 115 is provided with 113.Such as bit body 110 as a example by 6 cutting wings 111 are set, then 6 bites
6 wing gaps 113 are formed between the wing 111, i.e., each wing gap 113 is at least provided with 1 hydrophthalmia 115.It is many by setting
Individual and shower nozzle 114 and hydrophthalmia 115, can either facilitate the brill of PDC drill bit 100 to open bottom, and Transport of Drilling Cutting In A can be increased again
Amount, so as to improve drilling efficiency.
Fig. 3 and Fig. 4 is refer to, joint 120 includes top connection 121 and lower contact 122.Top connection 121 and lower contact 122 are
It is wholely set.Top connection 121 is connected away from the end of lower contact 122 with bit body 110, and top connection 121 and lower contact 122 are used
It is engaged in drilling rod (not illustrated in figure), is rotated by the rotation driving PDC drill bit 100 of drilling rod and realize drilling well.Top connection 121
There is cavity with the inside of lower contact 122.The cavity of bit body 110 is connected with the cavity of joint 120 and forms liquid guiding cavity 125, i.e.,
The end that liquid guiding cavity 125 is located at lower contact 122 connects with drilling rod, and liquid guiding cavity 125 is located at end and the hydrophthalmia 115 of bit body 110
Connection.The outside wall surface of top connection 121 is relatively set with installation portion 123, and joint 120 is realized matching somebody with somebody with drilling rod by installation portion 123
Close.
The wall for surrounding liquid guiding cavity 125 of top connection 121 is peripherally and outwardly recessed to form cushion chamber 126 along it.Cushion chamber 126 with
Liquid guiding cavity 125 is connected.The side wall of top connection 121 is provided with multiple reversely spray orifices 124.One end of each reverse spray orifice 124 with it is slow
Rush chamber 126 to connect, the direction that the other end is directed away from bit body 110 extends through the side wall of top connection 121.It is appreciated that
For each reverse spray orifice 124 is obliquely installed in top connection 121, realizes the axis and joint 120 of each reverse spray orifice 124
Axis intersects.With further reference to Fig. 4, the axis of reverse spray orifice 124 is α with the angle of the axis of joint 120, then α is acute angle.
By setting reverse spray orifice 124, PDC drill bit 100 operationally, the drilling fluid entered into inside PDC drill bit 100 by drilling rod,
On the one hand can be sprayed by hydrophthalmia 115, on the other hand can be sprayed by reverse spray orifice 124.The portion sprayed by hydrophthalmia 115
Point drilling fluid to the stratum in the front of bit body 110 can wash away and be conducive to PDC drill bit 100 to bore layer of turning up the soil, and carry PDC brills
First 100 bore the landwaste opened returns to ground.The part drilling fluid sprayed by reverse spray orifice 124 can further promote drilling fluid to take
Band landwaste returns to ground, debris blockage well is prevented from, so as to improve drilling efficiency.
Preferably, the angle of α is advisable with 20 °~45 °, under this angle, the brill sprayed by hydrophthalmia 115 can be accelerated
Well liquid is merged with the drilling fluid sprayed by reverse spray orifice 124, prevents from being influenced each other between two strands of drilling fluids, so as to improve brill
The prop-carrying capacity of well liquid.
Fig. 5 is refer to, is led to control to be provided with the flow of the drilling fluid sprayed by reverse spray orifice 124, joint 120
Pendular ring 130.Drain ring 130 is rotated and is arranged in cushion chamber 126.Drain ring 130 is the tubulose knot being engaged with cushion chamber 126
Structure, the inner chamber of delivery hole 131 connects with liquid guiding cavity 125.Specifically, the side wall of drain ring 130 is provided with multiple delivery holes 131.
Each delivery hole 131 is through the side wall of drain ring 130.Delivery hole 131 the inward turning of cushion chamber 126 go to delivery hole 131 with
The reverse corresponding position of spray orifice 124, realizes the connection of liquid guiding cavity 125 and reverse spray orifice 124, the drilling fluid inside liquid guiding cavity 125
Entered into reverse spray orifice 124 via delivery hole 131 and finally spray joint 120.The rotation in cushion chamber 126 of delivery hole 131
To the position of delivery hole 131 and the non-corresponding of reverse spray orifice 124, the side wall of drain ring 130 closes reverse spray orifice 124.By leading
Pendular ring 130 and reversely spray orifice 124, realize the control to flowing through multiple reversely mud flow rates of spray orifice 124.Delivery hole 131
Multiple is provided with, such as delivery hole 131 is 2,3 or 4 etc., it can be understood as, the quantity of the delivery hole 131 of setting is got over
Many, delivery hole 131 is higher with the probability of the connection of reverse spray orifice 124, and the flow for flowing through the drilling fluid of reverse spray orifice 124 is bigger.Lead
The quantity of fluid apertures 131 can carry out reasonable selection, bit body 110 according to the quantity of the size of bit body 110 and cutting wing 111
Size and cutting wing 111 quantity can directly affect the size of well and the yield of landwaste, therefore, from more large-sized
Bit body 110 and a greater number of cutting wings 111, it should from the drain ring 130 with the more delivery hole 131 of quantity.
Fig. 5 is refer to, in order to realize rotation of the drain ring 130 in cushion chamber 126, the inwall of drain ring 130 is set
There are multiple intake chutes 132.Drain ring 130 includes the first port 133 and second port 134 that are oppositely arranged.Drain ring 130 is installed
When in cushion chamber 126, first port 133 is located at one end of the close bit body 110 of drain ring 130, and second port 134 is located at
One end of the close lower contact 122 of drain ring 130.The two ends of each intake chute 132 extend through and are located at first in drain ring 130
The bottom wall of port 133 and the bottom wall positioned at second port 134, and the bearing of trend drain ring 130 of each intake chute 132 axis
It is not parallel.I.e. each intake chute 132 runs through the side bottom wall away from bit body 110 of drain ring 130.Brill in liquid guiding cavity 125
Well liquid flows through drain ring 130, because intake chute 132 is not parallel with flowing to for drilling fluid, realizes driving drain ring by drilling fluid
130 rotate.
In order to realize that drain ring 130 is identical with the rotation direction of bit body 110, Fig. 5 is refer to, bit body 110 is counterclockwise
Rotation, intake chute 132 extends clockwise along the direction of its second port 134 to first port 133.That is intake chute 132
The parallel lines of center line are β with the axis angle of drain ring 130, then β is acute angle.Drilling fluid in liquid guiding cavity 125 is to bit body
110 directions are flowed, and the drilling fluid for flowing through intake chute 132 drives drain ring 130 to rotate counterclockwise, realizes drain ring 130
Rotation direction it is identical with the direction of rotation of bit body 110.By the rotation direction and bit body 110 that control drain ring 130
Direction of rotation it is identical, realize via reverse spray orifice 124 spray drilling fluid the direction of motion with via hydrophthalmia 115 spray
The direction of motion of drilling fluid is identical, contributes to two bursts of fusions of drilling fluid, there is provided prop-carrying capacity, prevents well from blocking.
Preferably, the angle of β is advisable with 45 °~60 °, under this angle, the brill sprayed by hydrophthalmia 115 can be accelerated
Well liquid is merged with the drilling fluid sprayed by reverse spray orifice 124, prevents from being influenced each other between two strands of drilling fluids, so as to improve brill
The prop-carrying capacity of well liquid.
In order to ensure operating of the drain ring 130 in cushion chamber 126, the close first port 133 of each intake chute 132
Depth of the depth less than its close second port 134.That is the depth of the side of close bit body 110 of each intake chute 132 is less than
The depth away from the side of bit body 110 of intake chute 132.By controlling the change of the depth of intake chute 132, can aid in and come from
The drilling fluid in the direction of 130 second port of drain ring 134 flows through intake chute 132.
The operation principle of PDC drill bit 100：PDC drill bit 100 drilling rod is arranged at by joint 120 and realize liquid guiding cavity 125 with
The inner space of drilling rod.During lower brill, drilling fluid is input into PDC drill bit 100 by drilling rod, drilling rod drives PDC drill bit 100 to rotate simultaneously
Brill is turned up the soil layer, and the Transport of Drilling Cutting In A sprayed by hydrophthalmia 115 and reverse spray orifice 124 returns to ground, that is, realize that drilling well works.
Second embodiment
Refer to Fig. 6, the present embodiment provides a kind of PDC drill bit 100a, its PDC drill bit 100 with first embodiment is substantially
Identical, the difference of the two is to be additionally provided with for supporting drain ring in the joint 120a of the PDC drill bit 100a of the present embodiment
The whirligig (not marked in figure) of 130a.
Whirligig includes mounting groove (not marked in figure) and multiple balls 136.Specifically, mounting groove includes being correspondingly arranged
The first groove 127 and the second groove 135.Wherein, the first groove 127 is arranged at the inwall of cushion chamber 126, the second groove 135
It is arranged at the outer wall of drain ring 130.Multiple balls 136 are rolled and are arranged at what is be made up of the first groove 127 and the second groove 135
In mounting groove.By setting tumbler, position that can be by drain ring 130a in cushion chamber 126 is fixed, and prevents drain ring
There is hair with the inwall of cushion chamber 126 and wipe in the bottom wall positioned at the bottom wall of first port 133 and positioned at second port 134 of 130a,
So as to reduce the resistance that drain ring 130a is rotated in cushion chamber 126.
Preferably, mounting groove is two, and two mounting grooves are arranged side by side.Specifically, two mounting grooves are located at respectively
The both sides of the reverse spray orifice 124 of the inwall of cushion chamber 126.I.e. the inwall of cushion chamber 126 has two the first grooves 127, drain ring
The outer wall of 130a has two the second grooves 135 for coordinating with the first groove 127 respectively.By such setting, one can be entered
Step increases stability of the drain ring 130a in cushion chamber 126, it is ensured that the rotating effect of drain ring 130a.
In sum, PDC drill bit of the present utility model 100, multiple reversely spray orifices 124 are set by its joint 120, are made
On the one hand obtain the drilling fluid inside the liquid guiding cavity 125 of PDC drill bit 100 can be sprayed by hydrophthalmia 115, on the other hand can be passed through
Reverse spray orifice 124 sprays.The landwaste for contributing to drilling fluid to carry under bit body 110 is bored returns to ground, is prevented from debris blockage
Well, so as to improve drilling efficiency.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (10)
1. a kind of PDC drill bit, it is characterised in that the joint being connected including bit body and with the bit body, the bit body edge
Its is circumferentially distributed multiple cutting wings, and the bit body has multiple hydrophthalmias, and the joint has equal with hydrophthalmia each described
The liquid guiding cavity of connection, the liquid guiding cavity is communicated with multiple reversely spray orifices, and each described reverse spray orifice is directed away from the bit body
Direction extend through the side wall of the joint, the axis of the axis of each reverse spray orifice with the joint intersects.
2. PDC drill bit according to claim 1, it is characterised in that surround the side wall of the liquid guiding cavity along it peripherally and outwardly
Depression forms cushion chamber, and the cushion chamber is connected with the liquid guiding cavity, and each described reverse spray orifice is connected with the cushion chamber.
3. PDC drill bit according to claim 2, it is characterised in that the PDC drill bit also includes drain ring, the drain
Ring is rotated and is arranged at the cushion chamber, and the drain ring is provided with the delivery hole for being connected with the reverse spray orifice, described to lead
Side wall of the fluid apertures through the drain ring.
4. PDC drill bit according to claim 3, it is characterised in that the delivery hole is provided with multiple.
5. PDC drill bit according to claim 3, it is characterised in that the inwall of the drain ring is provided with multiple intake chutes
So that the drain ring is rotated in the driving lower edge of drilling fluid with the bit body identical direction of rotation, each described intake chute
Through the side bottom wall away from the bit body of the drain ring, the bearing of trend of each intake chute and the drain ring
Axis it is not parallel.
6. PDC drill bit according to claim 5, it is characterised in that the close described bit body one of each intake chute
Depth away from the bit body side of the depth of side less than the intake chute.
7. PDC drill bit according to claim 3, it is characterised in that be additionally provided with the joint for supporting described leading
The whirligig of pendular ring.
8. PDC drill bit according to claim 7, it is characterised in that the whirligig includes being arranged at the cushion chamber
First groove of inwall, it is arranged at the drain ring outer wall and in corresponding second groove of first groove and multiple rolling
Pearl, first groove and second groove form mounting groove, and multiple balls are rolled and are arranged in the mounting groove.
9. PDC drill bit according to claim 8, it is characterised in that the mounting groove is two, and two mounting grooves are simultaneously
Row is set.
10. PDC drill bit according to claim 1, it is characterised in that there is wing between the two neighboring cutting wing
Gap, the hydrophthalmia is provided with each described wing gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621431531.7U CN206299344U (en) | 2016-12-26 | 2016-12-26 | A kind of PDC drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621431531.7U CN206299344U (en) | 2016-12-26 | 2016-12-26 | A kind of PDC drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206299344U true CN206299344U (en) | 2017-07-04 |
Family
ID=59205785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621431531.7U Expired - Fee Related CN206299344U (en) | 2016-12-26 | 2016-12-26 | A kind of PDC drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206299344U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854177A (en) * | 2019-01-17 | 2019-06-07 | 西南石油大学 | The multi-functional PDC drill bit mechanically regulated and controled |
| CN111946267A (en) * | 2020-08-24 | 2020-11-17 | 贵州盘江精煤股份有限公司 | Two-way anti-sticking drill bit with washing and slag-smoothing functions for coal mine |
| CN114809930A (en) * | 2022-04-27 | 2022-07-29 | 武汉亿斯达工具有限公司 | Combined PDC drill bit |
-
2016
- 2016-12-26 CN CN201621431531.7U patent/CN206299344U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854177A (en) * | 2019-01-17 | 2019-06-07 | 西南石油大学 | The multi-functional PDC drill bit mechanically regulated and controled |
| CN109854177B (en) * | 2019-01-17 | 2020-09-29 | 西南石油大学 | Mechanical adjustable multifunctional PDC drill bit |
| CN111946267A (en) * | 2020-08-24 | 2020-11-17 | 贵州盘江精煤股份有限公司 | Two-way anti-sticking drill bit with washing and slag-smoothing functions for coal mine |
| CN114809930A (en) * | 2022-04-27 | 2022-07-29 | 武汉亿斯达工具有限公司 | Combined PDC drill bit |
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Granted publication date: 20170704 Termination date: 20181226 |