CN207033349U - A kind of drill bit - Google Patents
A kind of drill bit Download PDFInfo
- Publication number
- CN207033349U CN207033349U CN201720121797.XU CN201720121797U CN207033349U CN 207033349 U CN207033349 U CN 207033349U CN 201720121797 U CN201720121797 U CN 201720121797U CN 207033349 U CN207033349 U CN 207033349U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- bit
- interior
- cutting portion
- centre bore
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of drill bit, including：Outer drill bit, cavity portion, the connector portions positioned at the top of the outer drill bit, the centre bore overlapped positioned at the outer bit cutting portion of the bottom of the outer drill bit and center line with the rotary centerline in the outer bit cutting portion including being arranged at the outer drill bit internal, and the centre bore will run through between the bottom surface of the outer drill bit and the cavity portion；Interior drill bit, the cavity portion is fixedly installed on, the bottom of the interior drill bit is provided with the interior bit cutting portion aligned with the centre bore, and the rotary centerline in the interior bit cutting portion and the rotary centerline in the outer bit cutting portion deviate.It is arranged such, drill bit provided by the utility model, it can solve the problem that the problem of central point linear velocity of drill bit is relatively low, and then can effectively improve the drilling efficiency of drill bit.
Description
Technical field
Drilling tool technical field is the utility model is related to, more specifically to a kind of drill bit.
Background technology
Drill bit is one of indispensable instrument during drilling subterranean passage, drives rotation fractured rock by power-equipment, bores
The efficiency of breaking rock of head is the key factor for directly affecting rate of penetration, and those skilled in the art are constantly researched and developed for drill bit,
Its purpose be exactly in order to further improve the efficiency of breaking rock of drill bit, wherein, drill bit structure, drill bit material, drill bit broken rock mode are
Influence the principal element of efficiency of breaking rock.
During subterranean resource exploration and development, particularly in oil and gas industry field, with superficial part oil-gas reservoir
Totally, deep-well, the quantity of ultradeep well increase year by year, but with the increase of well depth, rock stratum is harder to be difficult to crush, seriously for exploitation
Have impact on the raising of rate of penetration, existing conventional rock-breaking and well-drilling technology can not meet the technological requirement for putting forward effect, it is external for
Advanced speed-raising technical know-how monopolization, the reduction of drilling speed have become the technical bottleneck for restricting China's deep-seated oil gas reservoir Efficient Development.
PDC drill bit (Polycrystalline Diamond Compact bit, polycrystalline diamond compact bit) due to
The features such as its drilling efficiency is high, service life is long and be widely applied, serve product for deep-well, ultra-deep well drilling speed-raising
Pole acts on, but conventional PDC drill bit central point linear velocity is very low, have impact on the drilling efficiency of drill bit.
Therefore, it is relatively low how to solve the central point linear velocity of drill bit, have impact on the technical problem of the drilling efficiency of drill bit, into
For those skilled in the art's important technological problems to be solved.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of drill bit, and it can solve the problem that the central point linear speed of drill bit
The problem of relatively low is spent, and then the drilling efficiency of drill bit can be effectively improved.
A kind of drill bit provided by the utility model, including：
Outer drill bit, including be arranged at the cavity portion of the outer drill bit internal, the connector portions positioned at the top of the outer drill bit,
Positioned at the outer bit cutting portion of the bottom of the outer drill bit and center line and the rotary centerline weight in the outer bit cutting portion
The centre bore of conjunction, and the centre bore will run through between the bottom surface of the outer drill bit and the cavity portion；
Interior drill bit, is fixedly installed on the cavity portion, the bottom of the interior drill bit is provided with align with the centre bore in
Bit cutting portion, the rotary centerline in the interior bit cutting portion and the rotary centerline in the outer bit cutting portion deviate.
Preferably, the outer bit cutting portion is provided with the outer bit port for drilling fluid outflow, the interior bit cutting portion
Provided with for the interior bit port for drilling fluid outflow.
Preferably, the inwall of the centre bore is provided with cutting tooth.
Preferably, nipple mounting structure, the nipple mounting structure bag are provided with inside the connector portions of the outer drill bit
Inscribed hole and the First terrace positioned at inscribed hole lower end are included, the head of the interior drill bit is fixedly connected on the inscribed hole, and
The interior drill bit is provided with the second step face pushed against with the First terrace.
Preferably, the interior bit cutting portion is provided with PDC cutting tooths or gear wheel cutting tooth.
Preferably, the wing number in the outer bit cutting portion and the wing number in the interior bit cutting portion are identical or different.
In technical scheme provided by the utility model, because the bottom surface of outer drill bit is provided with centre bore, drill bit utilizes outer brill
Head can drill out core column, i.e., the centre bore correspondence position of outer drill bit can form core column, so, it is possible to discharge bottom rock
Internal stress, so as to reduce the crushing strength of rock, be advantageous to improve efficiency of breaking rock.
Then interior drill bit kata-rocks stem, and interior bit cutting portion and outer bit cutting portion eccentric setting are utilized, i.e., it is interior to bore
Head cutting portion deviates with well center, in this way, improving the linear velocity of interior bit cutting portion center, and then improves interior
The efficiency of breaking rock of drill bit, interior drill bit are superimposed with the organic composite of outer drill bit, on the basis of bit rock breaking mechanism is not changed,
By changing the crumbling method of rock, the purpose for improving drill bit efficiency of breaking rock is reached, site test results show, utilize this reality
Drilling efficiency 45.8%-88.6% can be averagely improved with the drill bit of new offer, saves drilling period 8-15 days, and drilling well matter
Amount meets design standard, realizes low energy consumption, the purpose of high efficiency drilling well.Meanwhile drill bit provided by the utility model also has
Structure design is simple, dependable performance, it is easy to operate the features such as.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic cross-sectional view of drill bit in the utility model embodiment.
In Fig. 1：
Outer drill bit -11, interior drill bit -12, connector portions -13, outer bit cutting portion -14, centre bore -15, interior drill bit are cut
Cut portion -16, outer bit port -17, interior bit port -18, inscribed hole -19, First terrace -20, second step face -
21。
Embodiment
The purpose of present embodiment is to provide a kind of drill bit, and it can solve the problem that the central point linear velocity of drill bit is relatively low
The problem of, and then the drilling efficiency of drill bit can be effectively improved.
Hereinafter, embodiment is illustrated referring to the drawings.In addition, embodiments illustrated below is not to described in claim
Utility model content rise any restriction effect.In addition, the full content of the composition represented by example below is not limited to conduct
Necessary to the solution of utility model described in claim.
Fig. 1, a kind of drill bit that present embodiment provides, including outer drill bit 11 and interior drill bit 12 are refer to, wherein, outside
Drill bit 11 is provided with cavity portion, connector portions 13, outer bit cutting portion 14 and centre bore 15, and cavity portion is arranged on the interior of outer drill bit 11
Portion, and connector portions 13 are used to be connected with external impetus equipment, connector portions 13 are arranged on the tip position of outer drill bit 11, and outer drill bit is cut
The lower position that portion 14 is arranged on outer drill bit 11 is cut, outer bit cutting portion 14 is used for rock cutting soil layer etc..It should be noted that
Above-mentioned " tip position " " lower position " refers to the meaning during placement state in drill bit such as Fig. 1.Centre bore 15 is by outer drill bit 11
Bottom surface and cavity portion between run through.
Interior drill bit 12 is fixedly installed in cavity portion, and the bottom of interior drill bit 12 is provided with cuts with the interior drill bit that centre bore 15 aligns
Portion 16 is cut, the rotary centerline b in interior bit cutting portion 16 and the rotary centerline a in outer bit cutting portion 14 are deviated.
It is arranged such, in the technical scheme that the present embodiment provides, because the bottom surface of outer drill bit 11 is provided with centre bore 15, bores
Head can drill out core column using outer drill bit 11, i.e., the correspondence position of centre bore 15 of outer drill bit 11 can form core column, in this way, energy
The internal stress of bottom rock is enough discharged, so as to reduce the crushing strength of rock, is advantageous to improve efficiency of breaking rock.
Then, using the interior kata-rocks stem of drill bit 12, and interior bit cutting portion 16 and the outer eccentric setting of bit cutting portion 14,
I.e. interior bit cutting portion 16 deviates with well center, in this way, improving the linear velocity of the interior center of bit cutting portion 16, enters
And the efficiency of breaking rock of interior drill bit 12 is improved, interior drill bit 12 is superimposed with the organic composite of outer drill bit 11, is not changing bit
On the basis of rock breaking mechanism, by changing the crumbling method of rock, the purpose for improving drill bit efficiency of breaking rock, field test are reached
As a result show, the drill bit provided using the present embodiment can averagely improve drilling efficiency 45.8%-88.6%, save drilling period
8-15 days, and drilling quality meets design standard, realizes low energy consumption, the purpose of high efficiency drilling well.Meanwhile the present embodiment provides
Drill bit also there is structure design simple, dependable performance, easy to operate.
In addition, the drill bit that the present embodiment provides, its outer bit cutting portion 14 is provided with the outer bit port for drilling fluid outflow
17, interior bit cutting portion 16 is provided with the interior bit port 18 being used for for drilling fluid outflow.
It is arranged such, drilling fluid can be introduced into interior drill bit 12, be flowed out by interior bit port 18, clean, cool down interior brill
Head cutting portion 16, then the outer bit port 17 of process flows out drilling fluid again, cleans, cools down outer bit cutting portion 14, finally carries
Landwaste enter annular space and on return to ground.
In addition, in order that drill bit in the course of the work, efficient above-mentioned core column can be formed at centre bore 15,
Cutting tooth can be provided with the inwall of centre bore 15, is arranged such, the cutting tooth on the inwall of centre bore 15 can be cut rapidly
Above-mentioned core column.
In the present embodiment, interior drill bit 12 and outer drill bit 11 can link together in the following way, the joint of outer drill bit 11
The inside of portion 13 is provided with nipple mounting structure, nipple mounting structure include being inscribed hole 19 and positioned at the inscribed lower end of hole 19 first
Step surface 20, wherein, be inscribed hole 19 can the diminishing tapered pore structure in direction cross section from the bottom to top, and First terrace
20 positioned at inscribed hole 19 and the delivery position of cavity structure.
The head of interior drill bit 12 is fixedly connected on inscribed hole 19, can specifically pass through the sides such as pin connection or interference fit
Formula links together, and the head shape of interior drill bit 12 is consistent with the inscribed shape of hole 19, and interior drill bit 12 is provided with and first step
The second step face 21 that face 20 pushes against.
So, when drill bit in the course of the work, second step face 21 can push against First terrace 20, prevent interior drill bit 12
Rock, ensure that the reliability in the interior course of work of drill bit 12.And inscribed hole 19 is diminishing tapered pore structure,
Interior drill bit 12 is larger by power axially upwards when working, and can be further ensured that interior drill bit 12 and the connection in inscribed hole 19 are reliable
Property.
It should be noted that interior bit cutting portion 16 can be provided with PDC cutting tooths or gear wheel cutting tooth in the present embodiment, outside
The wing number in bit cutting portion 14 can be identical or different with the wing number in interior bit cutting portion 16.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (6)
- A kind of 1. drill bit, it is characterised in that including：Outer drill bit, including be arranged at the cavity portion of the outer drill bit internal, the connector portions positioned at the top of the outer drill bit, be located at What the outer bit cutting portion of the bottom of the outer drill bit and center line overlapped with the rotary centerline in the outer bit cutting portion Centre bore, and the centre bore will run through between the bottom surface of the outer drill bit and the cavity portion；Interior drill bit, is fixedly installed on the cavity portion, and the bottom of the interior drill bit is provided with the interior drill bit aligned with the centre bore Cutting portion, the rotary centerline in the interior bit cutting portion and the rotary centerline in the outer bit cutting portion deviate.
- 2. drill bit as claimed in claim 1, it is characterised in that the outer bit cutting portion is provided with the outer brill for drilling fluid outflow Head hydrophthalmia, the interior bit cutting portion are provided with the interior bit port being used for for drilling fluid outflow.
- 3. drill bit as claimed in claim 1, it is characterised in that the inwall of the centre bore is provided with cutting tooth.
- 4. the drill bit as described in claim any one of 1-3, it is characterised in that be provided with inside the connector portions of the outer drill bit inscribed Head mounting structure, the nipple mounting structure include inscribed hole and the First terrace positioned at inscribed hole lower end, the interior brill The head of head is fixedly connected on the inscribed hole, and the interior drill bit is provided with the second step pushed against with the First terrace Face.
- 5. drill bit as claimed in claim 1, it is characterised in that the interior bit cutting portion is provided with PDC cutting tooths or gear wheel is cut Cut tooth.
- 6. drill bit as claimed in claim 1, it is characterised in that the wing number in the outer bit cutting portion is cut with the interior drill bit The wing number for cutting portion is identical or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720121797.XU CN207033349U (en) | 2017-02-09 | 2017-02-09 | A kind of drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720121797.XU CN207033349U (en) | 2017-02-09 | 2017-02-09 | A kind of drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207033349U true CN207033349U (en) | 2018-02-23 |
Family
ID=61472171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720121797.XU Expired - Fee Related CN207033349U (en) | 2017-02-09 | 2017-02-09 | A kind of drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207033349U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939392A (en) * | 2019-12-31 | 2020-03-31 | 中国石油集团川庆钻探工程有限公司 | Double-speed double-core drilling speed-increasing equipment |
-
2017
- 2017-02-09 CN CN201720121797.XU patent/CN207033349U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939392A (en) * | 2019-12-31 | 2020-03-31 | 中国石油集团川庆钻探工程有限公司 | Double-speed double-core drilling speed-increasing equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180223 Termination date: 20220209 |