CN206668162U - A kind of drilling well PDC drill bit - Google Patents
A kind of drilling well PDC drill bit Download PDFInfo
- Publication number
- CN206668162U CN206668162U CN201720493228.8U CN201720493228U CN206668162U CN 206668162 U CN206668162 U CN 206668162U CN 201720493228 U CN201720493228 U CN 201720493228U CN 206668162 U CN206668162 U CN 206668162U
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- CN
- China
- Prior art keywords
- cutting edge
- cutting
- drill bit
- discharge groove
- drilling well
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- Withdrawn - After Issue
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Abstract
The utility model 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, at the top of front cutting edge at the top of highest cutting edge and at the top of minimum cutting edge on the midpoint of line, with being provided with some auxiliary cutting elements on the direction of the cutting edge homonymy on front cutting edge；Several rinse mouths, rinse mouth connect with the flushing chamber.The utility model solves the problems, such as that drill bit drill bit when shaft bottom produces out-of-balance force deflects, and substantially increases borehole stability.
Description
Technical field
The utility model belongs to PDC drill bit field, refers in particular to a kind of drilling well PDC drill bit.
Background technology
PDC drill bit is integral formula 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 gone, the matter amount and type of PDC cutting tooths are widely used in geological prospecting, mineral are opened all there occurs huge change
Adopt, the numerous areas such as oil-gas exploration.When drill bit moves in shaft bottom, out-of-balance force can be produced by having a common boundary in the rock stratum of different hardness, be led
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.
Utility model content
For the deficiency in the presence of prior art, the utility model proposes helically cable architecture at the top of a kind of drill bit
PDC drill bit, out-of-balance force can be effectively neutralized, realize stable drilling.
The utility model 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
It is little with cutting edge helix structure A in opposite direction, helix structure A lift angles α that end reduces formation successively in the counterclockwise direction
The angle beta formed between 0.1 °, 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 midpoint at the top of the front cutting edge at the top of highest cutting edge with line at the top of minimum cutting edge
On, with being provided with some auxiliary cutting elements on the direction of the cutting edge homonymy on the front cutting edge；
Several rinse mouths, the rinse mouth is arranged in the discharge groove between any twice adjacent cutting wing, described
Rinse mouth connects 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 increases, 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, which 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 utility model is arranged between multiple cutting wings of drill body bizet by protrusion 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 lubricates, and 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 due to the helical structure of single cutting edge with integral head is on the contrary, 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
Centrifugal force is produced, part centrifugal power and anti-cutting force can be with interacting in out-of-balance force caused by cutting different hardness rock stratum
Neutralize, meanwhile, front cutting edge is arranged to symmetrical structure, can effectively prevent that drill bit is oriented to inclined caused by asymmetric power is excessive
Turn, play gauge.
The utility model solves the problems, such as that drill bit drill bit when shaft bottom produces out-of-balance force deflects, and substantially increases drilling
Stability.
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 utility model.
Fig. 2 is a kind of front view of drilling well PDC drill bit embodiment 1 of the utility model.
Fig. 3 is Fig. 2 top view.
Fig. 4 is Fig. 2 upward view.
Reference is as follows：
1st, drill body 11, flushing chamber 2, cutting edge 21, discharge groove
22nd, cutting tooth 3, front cutting edge 23, auxiliary cutting element 4, rinse mouth
A, helix
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, under
Face combines and is specifically illustrating, and the utility model 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 utility model, and A is cutting edge top
The helix that portion is formed, the 3 interlaced distribution of cutting edge 2 and front cutting edge；Because angle value α, β and b are smaller, concrete structure
On do 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 are 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 °, and the angle beta formed between any two adjacent cutting edges is not
It is equal, in the present embodiment, be respectively designated as the adjacent angle beta difference b of β 1, β 2, β 3, any two no more than 1 °, be | 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, and all cutting edges exist
The same side is provided with some cutting tooths；The center of each discharge groove, which is additionally provided with, with cutting edge there is the secondary of identical quantity to cut
Sword 3, at the top of highest cutting edge and at the top of minimum cutting edge on the midpoint of line, the pair is cut at all front cutting edges top
Cut on sword with being provided with some auxiliary cutting elements 23 on the direction of the cutting edge homonymy；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 connects 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, can also 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, can also 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, which can then make cutting edge diminish, to be caused to cut
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
Connect, the auxiliary flushing hole set on each front cutting edge is 3.
It is arranged in the present embodiment by protrusion between multiple cutting wings of drill body bizet 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 lubricates, and 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 due to the helical structure of single cutting edge with integral head is on the contrary, 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
Centrifugal force is produced, part centrifugal power and anti-cutting force can be with interacting in out-of-balance force caused by cutting different hardness rock stratum
Neutralize, meanwhile, front cutting edge is arranged to symmetrical structure, can effectively prevent that drill bit is oriented to inclined caused by asymmetric power is excessive
Turn, play gauge.
Preferred embodiment of the present utility model is the foregoing is only, on the scope of protection of the utility model is not limited in
Embodiment is stated, every technical scheme for belonging to the utility model principle belongs to the scope of protection of the utility model.For this
For the technical staff in field, some improvement for being carried out on the premise of principle of the present utility model is not departed from, these improvement
It should be regarded as the scope of protection of the utility model.
Claims (5)
- A kind of 1. 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 are spirally coiled in the bizet of the drill body, the top of cutting edge according to Secondary reduce forms the helix structure A, the helix structure A lift angle α reverse with cutting edge no more than 0.1 °, and any two is adjacent Cutting edge between the angle beta that is formed 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 midpoint at the top of the front cutting edge at the top of highest cutting edge with line at the top of minimum cutting edge On, with being provided with some auxiliary cutting elements (23) on the direction of the cutting edge homonymy on the front cutting edge；Several rinse mouths (4), the rinse mouth (4) are arranged in the discharge groove between any twice adjacent cutting wing, institute Rinse mouth (4) is stated to connect 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 brill 0.05-0.2 times of head diameter, the height of the front cutting edge protrusion are 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, the 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 |
|---|---|---|---|
| CN201720493228.8U CN206668162U (en) | 2017-05-05 | 2017-05-05 | A kind of drilling well PDC drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720493228.8U CN206668162U (en) | 2017-05-05 | 2017-05-05 | A kind of drilling well PDC drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206668162U true CN206668162U (en) | 2017-11-24 |
Family
ID=60370747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720493228.8U Withdrawn - After Issue CN206668162U (en) | 2017-05-05 | 2017-05-05 | A kind of drilling well PDC drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206668162U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907112A (en) * | 2017-05-05 | 2017-06-30 | 宜昌神达石油机械有限公司 | A kind of drilling well PDC drill bit |
| CN113216859A (en) * | 2021-05-27 | 2021-08-06 | 河北锐石钻头制造有限公司 | PDC drill bit of cooperation double pendulum acceleration drilling tool |
-
2017
- 2017-05-05 CN CN201720493228.8U patent/CN206668162U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907112A (en) * | 2017-05-05 | 2017-06-30 | 宜昌神达石油机械有限公司 | A kind of drilling well PDC drill bit |
| CN113216859A (en) * | 2021-05-27 | 2021-08-06 | 河北锐石钻头制造有限公司 | PDC drill bit of cooperation double pendulum acceleration drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 443001 Three Gorges private science and Technology Park, Hubei, Yichang Patentee after: Yichang Shenda Technology Co.,Ltd. Address before: 443001 Three Gorges private science and Technology Park, Hubei, Yichang Patentee before: YICHANG SHENDA PETROMACHINE Co.,Ltd. |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171124 Effective date of abandoning: 20230620 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20171124 Effective date of abandoning: 20230620 |