CN201943582U - Combined type singe-roller bit - Google Patents
Combined type singe-roller bit Download PDFInfo
- Publication number
- CN201943582U CN201943582U CN2010206900487U CN201020690048U CN201943582U CN 201943582 U CN201943582 U CN 201943582U CN 2010206900487 U CN2010206900487 U CN 2010206900487U CN 201020690048 U CN201020690048 U CN 201020690048U CN 201943582 U CN201943582 U CN 201943582U
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- China
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- cutting teeth
- spearpoint
- drill bit
- combined type
- rotary drill
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Abstract
The utility model discloses a combined type single-roller bit, which comprises a bit body (1), a roller (2) and a roller tip (3), wherein cutting teeth (5) are distributed on the roller (2) and the roller tip (3), the bit body (1) is provided with a shaft neck (4), the roller (2) and the shaft neck (4) are rotatablely connected, and the roller tip (3) is fixedly connected with the front end of the shaft neck (4). The utility model is the single-roller bit which is formed by combing a fixed cutting structure and a non-fixed cutting structure, so the rock breaking efficiency of the bit is improved, and the lives of the cutting teeth are improved.
Description
Technical field
The invention belongs to drilling equipment technical fields such as petroleum gas, mine engineering, building foundation engineering construction, geology, the hydrology, relate to a kind of combined type single-cone rotary drill bit concretely.
Background technology
Drill bit be in the drilling engineering in order to fractured rock, form the rock crushing tool of pit shaft.Single-cone rotary drill bit is one of main rock crushing tool that uses in the drilling engineering, particularly plays an important role in the slimhole drilling of deep-well ultradeep well.
Single-cone rotary drill bit mainly utilizes the tooth on the gear wheel that rock is broken in the extruding shear action of rock.Existing single-cone rotary drill bit all belongs to the on-fixed cutter drill bits, and drill bit when rotation gear wheel rotates around axle journal, and the tooth on the gear wheel is scraped with web form in the shaft bottom and cut brokenly rock.Tooth part on the single-cone rotary drill bit gear wheel (spearpoint part) contacts brokenly rock with the shaft bottom all the time, part tooth contacts brokenly rock with the shaft bottom by turns, and this just has been divided into the gear wheel of single-cone rotary drill bit permanent contact zone (spearpoint part), has replaced contact zone and contact zone not.
For the cutting teeth of permanent contact zone (spearpoint part), its life-span often is lower than alternately contact zone and not contact zone, because the cutting teeth of permanent contact zone is in running order all the time, the rotation of spearpoint part brings effect by turns can not for its cutting teeth.Simultaneously because single-cone rotary drill bit mainly breaks rock with the netted form of cutting of scraping, the relative bottom rock of cutting teeth in the drill bit drilling process on the gear wheel scrape butt in continuous variation, this makes can't use the utmost point and be suitable for to scrape the composite polycrystal-diamond (PDC tooth) of the broken rock of the form of cutting on the single-cone rotary drill bit.Reason is that composite polycrystal-diamond (PDC tooth) is made up of matrix and polycrystalline diamond layer two parts, what rock was played main shaving effect is polycrystalline diamond layer, if the PDC tooth is subjected to the force direction amplitude of variation excessive in the course of the work, perhaps be subjected to opposition, be easy to cause bursting apart of polycrystalline diamond layer, seriously reduce the working life of PDC tooth.
Therefore, the cutting teeth on the existing single-cone rotary drill bit is generally hard-metal insert.When single-cone rotary drill bit was worked in the shaft bottom, the tooth wear on the gear wheel was inhomogeneous, the cutting teeth of its permanent contact zone (spearpoint part) wearing and tearing comparatively fast, the most serious, this descends the drill bit rate of penetration, bit life reduces.
Summary of the invention
The purpose of this invention is to provide a kind of single-cone rotary drill bit that is composited by stationary cutting structure and on-fixed cutting structure, improve the efficiency of breaking rock of drill bit and the life-span of cutting teeth.
Technical scheme of the present invention is as follows:
A kind of combined type single-cone rotary drill bit, comprise bit body, gear wheel, spearpoint, be furnished with cutting teeth on described gear wheel and the spearpoint, described bit body is provided with axle journal, described gear wheel and described axle journal form and are rotationally connected, and described spearpoint is fixedlyed connected with the front end of described axle journal.
Adopt said structure to make full use of the kinetic characteristic that single-cone rotary drill bit creeps into, cone body with traditional integrative-structure, spearpoint part and the rotating gear wheel part being arranged to maintain static, can not realize the spearpoint partial fixing of cutting teeth replacement work, can effectively improve the ability of its wedging rock, improve the whole efficiency of breaking rock of drill bit.
Described cutting teeth on the described spearpoint is a composite polycrystal-diamond.
Described gear wheel and spearpoint be combined as the spheric profile structure.
Be provided with ball between described axle journal and the gear wheel.Ball the axial limiting that can play gear wheel is set.
Described cutting teeth on the described spearpoint is a polycrystal diamond composite teeth.
Described cutting teeth on the described spearpoint is the TSP cutting teeth.
Described cutting teeth on the described spearpoint is the natural diamond cutting teeth.
Described cutting teeth on the described spearpoint is the impregnated with diamond cutting teeth.
Described cutting teeth on the described spearpoint is the carbide cutting tooth.
Described cutting teeth on the described spearpoint is the cubic boron nitride cutting teeth.
The present invention compared with prior art, its beneficial effect is:
(1) spearpoint of the present invention partly is cemented on the bit body, during the drill bit rotary drilling, cutting teeth in the permanent contact of spearpoint is fixing cutting teeth, thereby can on the permanent contact zone of spearpoint, use the extremely strong diamond class cutting teeth of abrasion resistance, particularly can adopt the utmost point to be suitable for the abrasion resistance and the efficiency of breaking rock of the fixedly cutting teeth on the spearpoint being strengthened greatly to scrape the composite polycrystal-diamond (PDC tooth) of the broken rock of butt formula.
(2) the fixedly cutting teeth circumferential movement locus on the spearpoint of the present invention forms the circular concentric zone of fracture in the shaft bottom, and the on-fixed cutting teeth on the gear wheel forms the netted zone of fracture of " people " font in the shaft bottom, the cross action of the broken rock tracks of two kinds of differences, the efficiency of breaking rock of cutting teeth and on-fixed cutting teeth all is very useful to improving fixedly.
(3) the permanent contact of spearpoint of the present invention is gone up when adopting the PDC tooth, and the hard-metal insert of more common single-cone rotary drill bit etc. is easier to the wedging stratum, helps improving the drill bit efficiency of breaking rock.
(4) spearpoint of the present invention directly is cemented on the bit body axle journal end, has reduced the mutual effect zone in gear wheel and shaft bottom, has reduced the load on the gear wheel, has promptly reduced the load of gear wheel bearing.Therefore, the present invention can effectively prolong the bit bearing life-span.
Description of drawings
The present invention will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a structural representation of the present invention.Among the figure: 1, bit body, 2, gear wheel, 3, spearpoint, 5, cutting teeth;
Fig. 2 is the schematic diagram of gear wheel and shaft bottom contact area.Among the figure: 1a, permanent contact zone, 1b, contact zone alternately, 1c, contact zone not;
Fig. 3 is the structural representation after gear wheel of the present invention is cut open.Among the figure: 4, axle journal, 4a, ball;
Fig. 4 is the structural representation of composite polycrystal-diamond (PDC) tooth.Among the figure: 6, polycrystalline diamond layer, 7, matrix;
Fig. 5 is the left view of Fig. 1;
The schematic diagram that Fig. 6 sees to the gear wheel direction along the gear wheel axis from spearpoint for the present invention;
Fig. 7 is under fixedly cutting teeth on the spearpoint of the present invention and the on-fixed cutting teeth acting in conjunction on the gear wheel, and drill bit is scraped the staggered netted scratch schematic diagram of the complexity that cuts out in the shaft bottom.Among the figure: 8, the fixedly cutting teeth on the spearpoint is scraped the concentric circles scratch that cuts out, and 9, the on-fixed cutting teeth on the gear wheel scrapes " people " font scratch that cuts out;
The specific embodiment
Shown in Fig. 1,3,5,6: a kind of combined type single-cone rotary drill bit, comprise bit body 1, gear wheel 2, spearpoint 3, be furnished with cutting teeth 5 on described gear wheel 2 and the spearpoint 3, described bit body 1 is provided with axle journal 4, described gear wheel 2 forms with described axle journal 4 and is rotationally connected, and it is characterized in that: described spearpoint 3 is fixedlyed connected with the front end of described axle journal 4.
Described cutting teeth 5 on the described spearpoint 3 for composite polycrystal-diamond, polycrystal diamond composite teeth, TSP cutting teeth, natural diamond cutting teeth, impregnated with diamond cutting teeth, carbide cutting tooth, cubic boron nitride cutting teeth, ceramic cutting teeth, comprise the cutting teeth of diamond or cubic boron nitride.
When drill bit creeps into, under the rotation of bit body 1 drives, when gear wheel 2 is done revolution around drill bit central axis, also make spinning motion around axle journal 4, the gear wheel 2 alternately on-fixed cutting teeth on the contact zone 1b forms " people " font scratch 9 in the shaft bottom under this compound motion; Because spearpoint 3 is cemented on axle journal 4 ends of bit body, with bit body 1 relative fixed, the fixedly cutting teeth during the drill bit rotary drilling on the spearpoint 1 permanent contact zone 1a will be around the center, shaft bottom at shaft bottom formation circular concentric scratch 8.Under the cross action of the broken rock scratch of above-mentioned two kinds of differences, the shaft bottom will form more complicated staggered netted scraping and cut zone of fracture.
Described gear wheel 2 and spearpoint 3 be combined as the spheric profile structure.
Be provided with ball 4a between described axle journal 4 and the gear wheel 2.
Claims (10)
1. combined type single-cone rotary drill bit, comprise bit body (1), gear wheel (2), spearpoint (3), be furnished with cutting teeth (5) on described gear wheel (2) and the spearpoint (3), described bit body (1) is provided with axle journal (4), described gear wheel (2) forms with described axle journal (4) and is rotationally connected, and it is characterized in that: described spearpoint (3) is fixedlyed connected with the front end of described axle journal (4).
2. a kind of combined type single-cone rotary drill bit according to claim 1 is characterized in that: the described cutting teeth (5) on the described spearpoint (3) is a composite polycrystal-diamond.
3. a kind of combined type single-cone rotary drill bit according to claim 1 and 2 is characterized in that: described gear wheel (2) and spearpoint (3) be combined as the spheric profile structure.
4. a kind of combined type single-cone rotary drill bit according to claim 1 and 2 is characterized in that: be provided with ball (4a) between described axle journal (4) and the gear wheel (2).
5. a kind of combined type single-cone rotary drill bit according to claim 1 is characterized in that: the described cutting teeth (5) on the described spearpoint (3) is a polycrystal diamond composite teeth.
6. a kind of combined type single-cone rotary drill bit according to claim 1 is characterized in that: the described cutting teeth (5) on the described spearpoint (3) is the TSP cutting teeth.
7. a kind of combined type single-cone rotary drill bit according to claim 1 is characterized in that: the described cutting teeth (5) on the described spearpoint (3) is the natural diamond cutting teeth.
8. a kind of combined type single-cone rotary drill bit according to claim 1 is characterized in that: the described cutting teeth (5) on the described spearpoint (3) is the impregnated with diamond cutting teeth.
9. a kind of combined type single-cone rotary drill bit according to claim 1 is characterized in that: the described cutting teeth (5) on the described spearpoint (3) is the carbide cutting tooth.
10. a kind of combined type single-cone rotary drill bit according to claim 1 is characterized in that: the described cutting teeth (5) on the described spearpoint (3) is the cubic boron nitride cutting teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206900487U CN201943582U (en) | 2010-12-30 | 2010-12-30 | Combined type singe-roller bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206900487U CN201943582U (en) | 2010-12-30 | 2010-12-30 | Combined type singe-roller bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201943582U true CN201943582U (en) | 2011-08-24 |
Family
ID=44470931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206900487U Expired - Lifetime CN201943582U (en) | 2010-12-30 | 2010-12-30 | Combined type singe-roller bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201943582U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022084A (en) * | 2010-12-30 | 2011-04-20 | 西南石油大学 | Compound single cone bit |
| CN103541660A (en) * | 2013-11-07 | 2014-01-29 | 西南石油大学 | Composite type eccentric one-cone bit |
| CN103541659A (en) * | 2013-11-07 | 2014-01-29 | 杨立源 | Single-cone compound drill bit |
| CN105443040A (en) * | 2015-12-04 | 2016-03-30 | 西南石油大学 | Novel tricone bit |
-
2010
- 2010-12-30 CN CN2010206900487U patent/CN201943582U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022084A (en) * | 2010-12-30 | 2011-04-20 | 西南石油大学 | Compound single cone bit |
| WO2012089142A1 (en) * | 2010-12-30 | 2012-07-05 | 西南石油大学 | Combined one cone bit |
| CN102022084B (en) * | 2010-12-30 | 2013-01-02 | 西南石油大学 | Compound single cone bit |
| CN103541660A (en) * | 2013-11-07 | 2014-01-29 | 西南石油大学 | Composite type eccentric one-cone bit |
| CN103541659A (en) * | 2013-11-07 | 2014-01-29 | 杨立源 | Single-cone compound drill bit |
| CN103541659B (en) * | 2013-11-07 | 2016-08-17 | 杨立源 | A kind of Single-cone compound drill bit |
| CN105443040A (en) * | 2015-12-04 | 2016-03-30 | 西南石油大学 | Novel tricone bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110824 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |