CN2558751Y - Offset single cone bit - Google Patents
Offset single cone bit Download PDFInfo
- Publication number
- CN2558751Y CN2558751Y CN 02278185 CN02278185U CN2558751Y CN 2558751 Y CN2558751 Y CN 2558751Y CN 02278185 CN02278185 CN 02278185 CN 02278185 U CN02278185 U CN 02278185U CN 2558751 Y CN2558751 Y CN 2558751Y
- Authority
- CN
- China
- Prior art keywords
- bit
- bit leg
- leg body
- rotary drill
- type single
- 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 - Lifetime
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Abstract
The utility model relates to a deviation type single roller bit applied to the field of oil, mine and geological drilling, comprising a bit leg body and a roller cone; a bit leg neck journal arranged at the lower part of the bit leg body is connected with the roller cone. The difference lies in that a deviation value d is between rotating direction of the axes of the bit leg neck journal and the axes of the roller bit and a gauge protection cushion embedded with gauge teeth or welded with wear-resistant alloy layer is arranged at the side of the bit leg body opposite to the deviation of the bit leg neck journal. The utility model the rock stocking and crushing performance of the single roller bit, improves the drilling performance of the single roller bit on hard ground and facilitates the single roller bit to be suitable to working in hard ground; the gauge protection cushion arranged at the opposite side of the deviation direction of the roller cone neck journal can prevent winding and the bit leg body from wearing and has the function of gauge protection; a plurality of jetting hydrophthalmia arranged at the oblique surface at the lower end of the bit leg body and a cuttings chute positioned at the side of the bit leg body can guarantee slurry goes back immediately with the rock debris, thus endowing the roller bit with excellent cleaning and debris exhausting performance.
Description
Technical field
The utility model relates to a kind of offset-type single-cone rotary drill bit that is used for oil, mine and geological drilling field, and it has to hard formation better fragmentation and creeps into performance.
Background technology
Existing single-cone rotary drill bit mainly is made of bit leg and gear wheel two parts, and bit leg comprises bit leg body and bit leg journel (holding), and gear wheel is formed rock bit by its endoporus and bit leg journel phase configuration.Usually the axis of bit leg body and the axis of rotation of rock bit coincide, and bit leg body axis and bit leg journel axis are to intersect mutually and be positioned at same plane; All on the cylinder that is distributed in bit leg, the drainage hole structure is promptly gone up in the water hole to the guarantor footpath piece of drill bit on interior water hole of hydraulic structure employing bit leg journel and the bit leg body.The single-cone rotary drill bit of this structure is full well drill bit; forward moving around roller axle at gear wheel to when bottom rock generation impact and being pressed into effect; gear wheel surface shaft bottom relatively also has very big sliding motion; and this sliding motion is all inequality on each position on gear wheel surface; make each tooth on the gear wheel on the surface, shaft bottom along different track slippages, the stratum is produced shear action forms and have the bottom hole pattern of netted cutting.The single-cone rotary drill bit stable working of this structure adapts in soft-medium hard formation work.But in hard formation, drill bit need have the ability of stronger impact grinding rock, and the broken rock mode of the sort of shearing slip of existing single-cone rotary drill bit can not adapt to the drilling demand in the hard formation.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of can the adaptation in the hard formation to work, and possesses the skew formula single-cone rotary drill bit than the thump crushing performance.
The utility model is that the technical scheme that technical problem adopted of the above-mentioned proposition of solution is: include bit leg body 1 and gear wheel 14, the bit leg body is divided into bit leg journel 2 and is linked to each other with gear wheel, its difference is that the direction of rotation along gear wheel has a deviant d between the axis of bit leg journel and the rock bit axis, be provided with at the bit leg body side surface of bit leg journel phase deviation offside and protect the footpath and fill up 6, protect being installed with gauge teeth 10 on the pad of footpath or applying the weldering wear-resistant alloy layer.
Press such scheme, on the inclined-plane, lower end of bit leg body, offer at least two and spray hydrophthalmia; Have an injection hydrophthalmia to be positioned on vertical symmetrical plane of rock bit, one or more injection hydrophthalmias are positioned at a side on the inclined-plane, lower end of bit leg body; Or have at least two to spray the side that hydrophthalmia is positioned at the inclined-plane, lower end of bit leg body; Side at the bit leg body is provided with chip area.
The beneficial effects of the utility model are: 1, because the skew of bit leg journel makes gear wheel direction of rotation along gear wheel when work increase a deviant, the mechanism of single-cone rotary drill bit full well drilling in the down-hole is changed to some extent, strengthened the performance of single-cone rotary drill bit impact grinding rock, improved single-cone rotary drill bit to the performance that hard formation creeps into, it can have been adapted in the hard formation work; 2, the offside in gear wheel axle journal offset direction is provided with and protects the footpath pad, can resist the wearing and tearing of circling round and preventing the bit leg body, also plays the effect of protecting the footpath simultaneously; 3, on the inclined-plane, lower end of bit leg body, offer a plurality of injection hydrophthalmias, offer chip area on the bit leg side simultaneously, can guarantee that the mud cutting carring returns in time, makes rock bit possess good cleaning chip removal performance.
Description of drawings
Fig. 1 is the stereogram of an embodiment of the utility model.
Fig. 2 is the stereogram of bit leg body among embodiment of the utility model.
Fig. 3 is the sectional view that the bit leg body sprays hydrophthalmia and expression bit leg journel skew spacing d among embodiment of the utility model.
Fig. 4 is the sectional view of the vertical symmetrical section of bit leg body among embodiment of the utility model.
Fig. 5 is a bit leg body cross sectional view among embodiment of the utility model.
Fig. 6 is a bit leg body cross sectional view among another embodiment of the utility model.
Fig. 7 is a compound tapered gear wheel stereogram among embodiment of the utility model.
Fig. 8 is a compound tapered gear wheel wheel body positive view among embodiment of the utility model.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing, include bit leg body 1 and gear wheel 14, the bit leg body is matched with gear wheel by the bit leg journel of dividing into (holding) 2, direction of rotation along gear wheel between the axis of bit leg journel and the rock bit axis has a deviant d, also promptly be offset a spacing d of vertical symmetrical plane at rock bit axis place, d=1～10mm, d=2～6mm usually; Bit leg journel is the single shaft axle journal, be circumferentially with steel ball locking slot 3, the lower end has oil through 4, be provided with sealing surface 5 in joint with the bit leg body, the gear wheel 14 of institute's socket on bit leg journel is compound tapered gear wheel, and profile is shown in Fig. 7,8, and the periphery of gear wheel is combined by overlength back cone 11, male cone (strobilus masculinus) 12 and main cone face 13 from top to bottom, make gear wheel be composite conic, on each conical surface, be installed with cutting teeth.Described main cone face is the negative conical surface, i.e. angle ε≤90 of main cone face bus and gear wheel centre of gyration line °, the back of the body inclination angle [theta]=30-80 of overlength back cone °; The vertical height of overlength back cone is the 20-80% of gear wheel height, is generally 40-80%.Be laid with anti-guarantor of circling round at the bit leg body side surface of bit leg journel phase deviation offside and directly fill up 6, protect and be installed on gauge teeth 10 on the pad of footpath or apply the weldering antifriction alloy, be provided with the chip area 7 of arc surface at the corresponding opposite side of protecting the footpath pad of bit leg body, the radian scope of chip area is 60～150 °, according to circumstances, also can fill up side 1 or 2 chip area is set in the guarantor footpath; In addition, offer two on inclined-plane, bit leg body lower end and spray hydrophthalmia, wherein right injection hydrophthalmia 8 is positioned at a side on the inclined-plane, lower end of bit leg body, with angle β=10～30 of vertical symmetrical plane at rock bit axis place °, central-injection hydrophthalmia 9 center lines are positioned at and vertical symmetrical plane, simultaneously with angle α=15～30 of bit leg body axis °, two rear ends of spraying hydrophthalmias all are connected with the interior inlet opening of bit leg body.
Claims (10)
1, a kind of offset-type single-cone rotary drill bit, include bit leg body (1) and gear wheel (14), the bit leg body is divided into bit leg journel (2) and is linked to each other with gear wheel, it is characterized in that the direction of rotation along gear wheel has a deviant d between the axis of bit leg journel and the rock bit axis, bit leg body side surface at bit leg journel phase deviation offside is provided with guarantor's footpath pad (6), protects directly to fill up being installed with gauge teeth (10) or applying the weldering wear-resistant alloy layer.
2,, it is characterized in that on the inclined-plane, lower end of bit leg body, offering at least two and spray hydrophthalmia by the described offset-type single-cone rotary drill bit of claim 1.
3, by the described offset-type single-cone rotary drill bit of claim 2, it is characterized in that having an injection hydrophthalmia to be positioned on vertical symmetrical plane of rock bit, one or more injection hydrophthalmias are positioned at a side on the inclined-plane, lower end of bit leg body.
4,, it is characterized in that having at least two and spray the side that hydrophthalmia is positioned at the inclined-plane, lower end of bit leg body by the described offset-type single-cone rotary drill bit of claim 2.
5, by claim 1 or 2 described offset-type single-cone rotary drill bits, it is characterized in that being provided with chip area in the side of bit leg body.
6, by claim 1 or 2 described offset-type single-cone rotary drill bits, it is characterized in that bit leg journel (2) is the single shaft axle journal.
7, by claim 1 or 2 described offset-type single-cone rotary drill bits, it is characterized in that gear wheel (14) is compound tapered gear wheel, the periphery of gear wheel is combined by overlength back cone (11), male cone (strobilus masculinus) (12) and main cone face (13) from top to bottom, make gear wheel be composite conic, be installed with cutting teeth on each conical surface.
8, by the described offset-type single-cone rotary drill bit of claim 5, it is characterized in that being provided with the chip area of arc surface at the corresponding opposite side of protecting the footpath pad of bit leg body, the radian scope of chip area is 60～150 °.
9,, it is characterized in that filling up side in the guarantor footpath is provided with 1 or 2 chip area by the described offset-type single-cone rotary drill bit of claim 8.
10, by the described offset-type single-cone rotary drill bit of claim 3, it is characterized in that offering two on inclined-plane, bit leg body lower end sprays hydrophthalmia, wherein right injection hydrophthalmia (8) is positioned at a side on the inclined-plane, lower end of bit leg body, with angle β=10～30 of vertical symmetrical plane at rock bit axis place °, central-injection hydrophthalmia (9) center line is positioned at and vertical symmetrical plane, simultaneously with angle α=15～30 of bit leg body axis °, two rear ends of spraying hydrophthalmias all are connected with the interior inlet opening of bit leg body.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02278185 CN2558751Y (en) | 2002-06-28 | 2002-06-28 | Offset single cone bit |
| AU2003221233A AU2003221233A1 (en) | 2002-04-23 | 2003-03-26 | A roller bit with a journal pin offset from the central axis thereof |
| RU2004126429/03A RU2280143C2 (en) | 2002-04-23 | 2003-03-26 | One-cutter rock drilling bit |
| CA002477576A CA2477576C (en) | 2002-04-23 | 2003-03-26 | A single cone bit with offset axis and composite cones |
| PCT/CN2003/000220 WO2003091531A1 (en) | 2002-04-23 | 2003-03-26 | A roller bit with a journal pin offset from the central axis thereof |
| US10/512,399 US7299887B2 (en) | 2002-04-23 | 2003-03-26 | Roller bit with a journal pin offset from the central axis thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02278185 CN2558751Y (en) | 2002-06-28 | 2002-06-28 | Offset single cone bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2558751Y true CN2558751Y (en) | 2003-07-02 |
Family
ID=33741577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02278185 Expired - Lifetime CN2558751Y (en) | 2002-04-23 | 2002-06-28 | Offset single cone bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2558751Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101970785A (en) * | 2008-05-09 | 2011-02-09 | 六号元素控股有限公司 | Drill bit head for percussion drilling apparatus |
| CN103382810A (en) * | 2013-07-26 | 2013-11-06 | 中国矿业大学 | Special drill bit for bottom anchor drilling machine |
| CN103758458A (en) * | 2014-01-10 | 2014-04-30 | 西南石油大学 | Hybrid single-cone drill bit |
| WO2015013843A1 (en) * | 2013-07-31 | 2015-02-05 | 宁波工程学院 | Micromachining cutting process using particle cutter |
-
2002
- 2002-06-28 CN CN 02278185 patent/CN2558751Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101970785A (en) * | 2008-05-09 | 2011-02-09 | 六号元素控股有限公司 | Drill bit head for percussion drilling apparatus |
| CN103382810A (en) * | 2013-07-26 | 2013-11-06 | 中国矿业大学 | Special drill bit for bottom anchor drilling machine |
| CN103382810B (en) * | 2013-07-26 | 2016-01-20 | 中国矿业大学 | Anchor rig target drill of a kind of end |
| WO2015013843A1 (en) * | 2013-07-31 | 2015-02-05 | 宁波工程学院 | Micromachining cutting process using particle cutter |
| CN103758458A (en) * | 2014-01-10 | 2014-04-30 | 西南石油大学 | Hybrid single-cone drill bit |
| CN103758458B (en) * | 2014-01-10 | 2015-12-30 | 西南石油大学 | A kind of hybrid single-cone rotary drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120628 Granted publication date: 20030702 |