CN106907112A - A kind of drilling well PDC drill bit - Google Patents
A kind of drilling well PDC drill bit Download PDFInfo
- Publication number
- CN106907112A CN106907112A CN201710312836.9A CN201710312836A CN106907112A CN 106907112 A CN106907112 A CN 106907112A CN 201710312836 A CN201710312836 A CN 201710312836A CN 106907112 A CN106907112 A CN 106907112A
- Authority
- CN
- China
- Prior art keywords
- cutting edge
- cutting
- drill bit
- discharge groove
- drilling well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a kind of drilling well PDC drill bit, including：Drill body, there is flushing chamber inside the drill body；Several tops reduce the cutting edge to form the bizet that helix structure is projectedly arranged on the drill body successively, the angle formed between any two adjacent cutting edges is unequal, discharge groove is formed between the adjacent cutting edge of any twice, all cutting edges are provided with some cutting tooths several end cutting edges in the same side, end cutting edge is projectedly arranged on the center of each discharge groove and has identical quantity with the discharge groove, front cutting edge top is located on the midpoint of highest cutting edge top and minimum cutting edge top line, on front cutting edge with the direction of the cutting edge homonymy on be provided with some auxiliary cutting elements；Several rinse mouths, rinse mouth is connected with the flushing chamber.The present invention solves the problems, such as drill bit drill bit deflection when shaft bottom produces out-of-balance force, substantially increases borehole stability.
Description
Technical field
The invention belongs to PDC drill bit field, a kind of drilling well PDC drill bit is referred in particular to.
Background technology
PDC drill bit is an integral (drill) bit, is divided into matrix-type drill bit and the major class of steel body type drill bit two, and whole drill bit is not lived
Dynamic parts, it is relatively simple for structure, substantially it is made up of several parts such as bit matrix, Cutter, nozzle and chip area.In mistake
In several years for going, the matter amount and type of PDC cutting tooths all there occurs huge change, is widely used in geological prospecting, mineral and opens
Adopt, the numerous areas such as oil-gas exploration.When shaft bottom is moved, having a common boundary in the rock stratum of different hardness can produce out-of-balance force to drill bit, lead
Cause drilling deviation occur or even damage drill bit, be now badly in need of wanting a kind of drill bit that can stablize drilling.
The content of the invention
For the deficiency in the presence of prior art, the present invention proposes that helically the PDC of cable architecture is bored at the top of a kind of drill bit
Head, can effectively neutralize out-of-balance force, realize stabilization drilling.
The present invention is realized by following scheme：
A kind of drilling well PDC drill bit, including：
Drill body, there is flushing chamber inside the drill body；
Several cutting edges, projectedly spiral is arranged on the bizet of the drill body, the top of cutting edge to the cutting edge
End reduces formed and cutting edge helix structure A in opposite direction in the counterclockwise direction successively, and α is little for helix structure A lift angles
In 0.1 °, the angle beta formed between any two adjacent cutting edges is unequal, and any two adjacent angle beta difference b are not more than
1 °, discharge groove is formed between the adjacent cutting edge of any twice, all cutting edges are provided with some cutting tooths in the same side；
Several end cutting edges, the end cutting edge be projectedly arranged on the center of each discharge groove and with the discharge groove
With identical quantity, the front cutting edge top is located at the midpoint of highest cutting edge top and minimum cutting edge top line
On, on the front cutting edge with the direction of the cutting edge homonymy on be provided with some auxiliary cutting elements；
Several rinse mouths, the rinse mouth is arranged in the discharge groove between any twice adjacent cutting wing, described
Rinse mouth is connected with the flushing chamber.
The too conference of a angles causes cutting force excessively to concentrate on a cutting edge, shortens bit life；B too conferences cause
Centrifugal force is increased, and makes cutting unstable.
Preferably, the height of the cutting edge protrusion is 0.05-0.2 times of bit diameter, the front cutting edge protrusion
Height with it is described cutting wing protrusion height it is suitable, too short can cause discharge groove discharge to be blocked not in time, too high to make to cut
Cut sword and bear moment of torsion change greatly.
Preferably, the cutting edge sets 3-5, when the cutting edge of less than 3 is not contour, it is difficult to ensure that cutting force
It is uniformly distributed, the easy sideslip of drill bit, excessive cutting edge can then make cutting edge diminish causes cutting force inadequate.
Preferably, auxiliary flushing hole is provided with the end cutting edge, the auxiliary flushing hole connects with the flushing chamber
Logical, the auxiliary flushing hole set on each front cutting edge is 3.
The present invention forms discharge groove between multiple cutting wings of drill body bizet are arranged on by protrusion, improves cutting
The expulsion efficiency of material, and sufficient cutting fluid or compression are provided in drill bit drilling process by rinsing empty and auxiliary flushing hole
Air lubrication, takes away the heat of drill bit in time, plays the protective effect to drill bit.
Drill edge is not contour, and the shearing force that each cutting tooth is subject to is different, and drill bit itself produces deflection, can form one
Individual new out-of-balance force, the hand of helix formed with integral head due to the helical structure of single cutting edge is conversely, can alleviate
A part of out-of-balance force, further, since angle is different between adjacent cutting sword, whole drill bit is in dissymmetrical structure, meeting during cutting
Producing centrifugal force, part centrifugal power and anti-cutting force can interact with the out-of-balance force produced when different hardness rock stratum is cut
Neutralize, meanwhile, front cutting edge is arranged to symmetrical structure, can effectively prevent because asymmetric power it is excessive caused by drill bit be oriented to it is inclined
Turn, play gauge.
The present invention solves the problems, such as drill bit drill bit deflection when shaft bottom produces out-of-balance force, substantially increases borehole stability
Property.
Brief description of the drawings
Fig. 1 is a kind of cutting edge Distribution Principle figure of drilling well PDC drill bit embodiment 1 of the invention.
Fig. 2 is a kind of front view of drilling well PDC drill bit embodiment 1 of the invention.
Fig. 3 is the top view of Fig. 2.
Fig. 4 is the upward view of Fig. 2.
Reference is as follows：
1st, drill body 11, flushing chamber 2, cutting edge 21, discharge groove 22, cutting tooth 3, front cutting edge 23, auxiliary are cut
Cut tooth 4, rinse mouth A, helix
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention is realized are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
Fig. 1 is a kind of cutting edge Distribution Principle figure of drilling well PDC drill bit embodiment 1 of the invention, and A is cutting edge top shape
Into helix, cutting edge 2 and the interlaced distribution of front cutting edge 3；Because angle value α, β and b are smaller, on concrete structure not
Do and clearly indicate.
As shown in Fig. 2 a kind of drilling well PDC drill bit, including drill body 1, the inside of drill body 1 is flushing chamber 11；Three
Individual cutting edge 2 is projectedly arranged on the bizet of drill body 1, and the top of cutting edge not in the same plane, but reduces successively
Helix structure is formed, helix structure lift angle α is not more than 0.1 °, the angle beta formed between any two adjacent cutting edges is not
It is equal, in the present embodiment, it is respectively designated as the adjacent angle beta difference b of β 1, β 2, β 3, any two and is not more than 1 °, as | β 1- β
2 |≤1, | β 1- β 2 |≤1, | β 1- β 2 |≤1, discharge groove is formed between the adjacent cutting edge of any twice, all cutting edges exist
The same side is provided with some cutting tooths；The center of each discharge groove is additionally provided with the secondary cutting for having identical quantity with cutting edge
Sword 3, all of front cutting edge top is located on the midpoint of highest cutting edge top and minimum cutting edge top line, and the pair is cut
Cut on sword with the direction of the cutting edge homonymy on be provided with some auxiliary cutting elements 23；Several rinse mouths 4, the flushing
Mouth 4 is arranged in the discharge groove between any twice adjacent cutting wing, and the rinse mouth 4 is connected with the flushing chamber 11, this
Rinse mouth has 12 in embodiment, the top and top of the discharge groove being respectively distributed between main cutting edge and front cutting edge.
In the present embodiment, helix structure lift angle α is 0.1 °, and angle too conference causes cutting force excessively to concentrate on a sword
On mouth, shorten bit life；Difference b is 1 °, and b too conferences cause centrifugal force to increase, and make cutting unstable.
In the present embodiment, the height of cutting edge protrusion is 0.2 times of bit diameter, the height of the front cutting edge protrusion with
The cutting wing protrusion height is suitable, it is also possible to slightly exceed cutting edge, too short can cause discharge groove discharge to be blocked not in time
Plug, it is too high that cutting edge can be made to bear moment of torsion change greatly.
In the present embodiment, the cutting edge sets 3, it is also possible to set 4 or 5, the cutting edge of less than 3 is not contour
When, it is difficult to ensure that cutting force is uniformly distributed, the easy sideslip of drill bit, excessive cutting edge can then make cutting edge diminish and cause cutting
Power is inadequate.
In the present embodiment, auxiliary flushing hole, the auxiliary flushing hole and the flushing chamber are provided with the end cutting edge
Connection, the auxiliary flushing hole set on each front cutting edge is 3.
It is arranged between the multiple of drill body bizet cuts wings by protrusion in the present embodiment and forms discharge groove, is improved
Cut the expulsion efficiency of material, and by rinse empty and auxiliary flushing hole provided in drill bit drilling process sufficient cutting fluid or
Compressed air is lubricated, and the heat of drill bit is taken away in time, plays the protective effect to drill bit.
Drill edge is not contour, and the shearing force that each cutting tooth is subject to is different, and drill bit itself produces deflection, can form one
Individual new out-of-balance force, the hand of helix formed with integral head due to the helical structure of single cutting edge is conversely, can alleviate
A part of out-of-balance force, further, since angle is different between adjacent cutting sword, whole drill bit is in dissymmetrical structure, meeting during cutting
Producing centrifugal force, part centrifugal power and anti-cutting force can interact with the out-of-balance force produced when different hardness rock stratum is cut
Neutralize, meanwhile, front cutting edge is arranged to symmetrical structure, can effectively prevent because asymmetric power it is excessive caused by drill bit be oriented to it is inclined
Turn, play gauge.
The preferred embodiment of the present invention is the foregoing is only, protection scope of the present invention is not limited in above-mentioned embodiment party
Formula, every technical scheme for belonging to the principle of the invention belongs to protection scope of the present invention.For those skilled in the art
Speech, some improvement carried out on the premise of principle of the invention is not departed from, these improvement also should be regarded as protection model of the invention
Enclose.
Claims (5)
1. a kind of drilling well PDC drill bit, it is characterised in that including：
Drill body (1), there is flushing chamber (11) inside the drill body；
Several cutting edges (2), cutting edge protrusion is spirally coiled in the bizet of the drill body, the top of cutting edge according to
Secondary reduction is formed and is not more than 0.1 ° with cutting edge reverse helix structure A, the helix structure A lift angles α, and any two is adjacent
Cutting edge between formed angle beta it is unequal, any two adjacent angulars β differences b is not more than 1 °, the adjacent cutting of any twice
Discharge groove (21) is formed between sword, all cutting edges are provided with some cutting tooths (22) in the same side；
Several end cutting edges (3), the end cutting edge be projectedly arranged on the center of each discharge groove and with the discharge groove
With identical quantity, the front cutting edge top is located at the midpoint of highest cutting edge top and minimum cutting edge top line
On, on the front cutting edge with the direction of the cutting edge homonymy on be provided with some auxiliary cutting elements (23)；
Several rinse mouths (4), the rinse mouth (4) is arranged in the discharge groove between any twice adjacent cutting wing, institute
Rinse mouth (4) is stated to be connected with the flushing chamber (11).
2. a kind of drilling well PDC drill bit as claimed in claim 1, it is characterised in that the height of the cutting edge protrusion is to bore
0.05-0.2 times of head diameter, the height of the front cutting edge protrusion is suitable with the cutting wing protrusion height.
3. a kind of drilling well PDC drill bit as claimed in claim 1, it is characterised in that the cutting edge sets 3-5.
4. a kind of drilling well PDC drill bit as claimed in claim 1, it is characterised in that be provided with the end cutting edge (3) auxiliary
Flushing hole (31) is helped, auxiliary flushing hole (31) connects with the flushing chamber.
5. a kind of drilling well PDC drill bit as claimed in claim 1, it is characterised in that what is set on each front cutting edge is auxiliary
It is 4 to help flushing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710312836.9A CN106907112B (en) | 2017-05-05 | 2017-05-05 | PDC drill bit for well drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710312836.9A CN106907112B (en) | 2017-05-05 | 2017-05-05 | PDC drill bit for well drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106907112A true CN106907112A (en) | 2017-06-30 |
| CN106907112B CN106907112B (en) | 2023-06-20 |
Family
ID=59210851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710312836.9A Active CN106907112B (en) | 2017-05-05 | 2017-05-05 | PDC drill bit for well drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106907112B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216841A (en) * | 2021-05-27 | 2021-08-06 | 河北锐石钻头制造有限公司 | PDC drill bit capable of automatically adjusting |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4719979A (en) * | 1986-03-24 | 1988-01-19 | Smith International, Inc. | Expendable diamond drag bit |
| US5173014A (en) * | 1992-02-07 | 1992-12-22 | General Motors Corporation | Four flute center cutting drill |
| US5971087A (en) * | 1998-05-20 | 1999-10-26 | Baker Hughes Incorporated | Reduced residual tensile stress superabrasive cutters for earth boring and drill bits so equipped |
| US6032750A (en) * | 1995-05-09 | 2000-03-07 | Gebrueder Heller Dinklage Gmbh | Drilling tool having a drill bit with primary and secondary cutting edges |
| US6230828B1 (en) * | 1997-09-08 | 2001-05-15 | Baker Hughes Incorporated | Rotary drilling bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics |
| US20080105466A1 (en) * | 2006-10-02 | 2008-05-08 | Hoffmaster Carl M | Drag Bits with Dropping Tendencies and Methods for Making the Same |
| CN203374210U (en) * | 2013-06-18 | 2014-01-01 | 中国海洋石油总公司 | Polycrystalline diamond compact (PDC) drill bit with five blades and main elliptical cutting teeth |
| EP2775090A2 (en) * | 2013-03-05 | 2014-09-10 | Dywidag-Systems International GmbH | Drill bit |
| CN204663401U (en) * | 2015-06-09 | 2015-09-23 | 成都迪普金刚石钻头有限责任公司 | A kind of PDC drill bit improving heart portion efficiency of breaking rock |
| CN204920811U (en) * | 2015-08-24 | 2015-12-30 | 四川川石金刚石钻头有限公司 | Mud drum PDC drill bit is prevented to step wing |
| CN205532309U (en) * | 2016-04-29 | 2016-08-31 | 四川奥格特金刚石钻头有限公司 | Crown has double concave cutting structure's PDC drill bit |
| CN206668162U (en) * | 2017-05-05 | 2017-11-24 | 宜昌神达石油机械有限公司 | A kind of drilling well PDC drill bit |
-
2017
- 2017-05-05 CN CN201710312836.9A patent/CN106907112B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4719979A (en) * | 1986-03-24 | 1988-01-19 | Smith International, Inc. | Expendable diamond drag bit |
| US5173014A (en) * | 1992-02-07 | 1992-12-22 | General Motors Corporation | Four flute center cutting drill |
| US6032750A (en) * | 1995-05-09 | 2000-03-07 | Gebrueder Heller Dinklage Gmbh | Drilling tool having a drill bit with primary and secondary cutting edges |
| US6230828B1 (en) * | 1997-09-08 | 2001-05-15 | Baker Hughes Incorporated | Rotary drilling bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics |
| US5971087A (en) * | 1998-05-20 | 1999-10-26 | Baker Hughes Incorporated | Reduced residual tensile stress superabrasive cutters for earth boring and drill bits so equipped |
| US20080105466A1 (en) * | 2006-10-02 | 2008-05-08 | Hoffmaster Carl M | Drag Bits with Dropping Tendencies and Methods for Making the Same |
| EP2775090A2 (en) * | 2013-03-05 | 2014-09-10 | Dywidag-Systems International GmbH | Drill bit |
| CN203374210U (en) * | 2013-06-18 | 2014-01-01 | 中国海洋石油总公司 | Polycrystalline diamond compact (PDC) drill bit with five blades and main elliptical cutting teeth |
| CN204663401U (en) * | 2015-06-09 | 2015-09-23 | 成都迪普金刚石钻头有限责任公司 | A kind of PDC drill bit improving heart portion efficiency of breaking rock |
| CN204920811U (en) * | 2015-08-24 | 2015-12-30 | 四川川石金刚石钻头有限公司 | Mud drum PDC drill bit is prevented to step wing |
| CN205532309U (en) * | 2016-04-29 | 2016-08-31 | 四川奥格特金刚石钻头有限公司 | Crown has double concave cutting structure's PDC drill bit |
| CN206668162U (en) * | 2017-05-05 | 2017-11-24 | 宜昌神达石油机械有限公司 | A kind of drilling well PDC drill bit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216841A (en) * | 2021-05-27 | 2021-08-06 | 河北锐石钻头制造有限公司 | PDC drill bit capable of automatically adjusting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106907112B (en) | 2023-06-20 |
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Address after: 443001 Three Gorges private science and Technology Park, Hubei, Yichang Applicant after: Yichang Shenda Technology Co.,Ltd. Address before: 443001 Three Gorges private science and Technology Park, Hubei, Yichang Applicant before: YICHANG SHENDA PETROMACHINE Co.,Ltd. |
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