CN201679448U - High rotating speed high pressure resistant impact-resistance roller bit - Google Patents
High rotating speed high pressure resistant impact-resistance roller bit Download PDFInfo
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- CN201679448U CN201679448U CN2010201984607U CN201020198460U CN201679448U CN 201679448 U CN201679448 U CN 201679448U CN 2010201984607 U CN2010201984607 U CN 2010201984607U CN 201020198460 U CN201020198460 U CN 201020198460U CN 201679448 U CN201679448 U CN 201679448U
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Abstract
The utility model relates to a high rotating speed high pressure resistant impact-resistance roller bit, comprising a roller cone and a roller palm, the roller palm is provided with a large shaft neck and a small shaft neck, the roller cone is provided with a large shaft hole and a small shaft hole correspondingly, the large shaft hole and the small shaft hole of the roller cone are respectively sheathed on the large shaft neck and the small shaft neck of the roller palm, and a pin roller embedded in a roller path is connected with the roller palm in a rolling friction way; the high rotating speed high pressure resistant impact-resistance roller bit is characterized in that: a shaft diameter half rolling way formed by a shaft neck circular groove of which the width is extended close to the end part of the large shaft neck is arranged on the circumference of the outer surface of the large shaft neck, a shaft hole half rolling way formed by a shaft hole circular groove is arranged on the large shaft hole wall corresponding to the shaft diameter half rolling way, and the rolling way is formed by closing the shaft diameter half rolling way and the shaft hole half rolling way; the pin roller is a cavity lengthening pin roller with curved end surface, and the bus of the cylindrical surface of the pin roller is an externally-protruded logarithmic curve or arc line; the high rotating speed high pressure resistant impact-resistance roller bit has the advantages that the high rotating speed high pressure resistant impact-resistance roller bit which can support higher load and enhance the impact resistance is provided, and the roller bit is suitable for high-pressure deep drilling operation.
Description
Technical field
The utility model relates to a kind of rock bit that is used for oil drilling and geological prospecting, relates in particular to a kind of high pressure resistant and impact resistant roller bit with high rotating speed.
Background technology
Be extensive use of rock bit at oil drilling and geological exploration field at present, as shown in Figure 1, rock bit mainly is made up of gear wheel 20 and bit leg 40 two parts, and gear wheel 20 engages with bit leg by sliding bearing or rolling bearing structure.Bit leg 40 is provided with big axle journal 41 and pilot pin 42, gear wheel 20 correspondences are provided with big axis hole 21 and little axis hole 22, the big axis hole 21 of gear wheel and little axis hole 22 are set on the big axle journal 41 and pilot pin 42 of bit leg, and, also promptly be locked on the bit leg 40 by gear wheel 20 being locked on the big axle journal 41 at a circle annulate shaft locking ball 6 that is provided with near big axle journal end.The annulus raceway 60 of locking ball 6 is axle journal ball half raceways of forming of the circular ring type semi-circular section groove by big axle journal 41 outsides and is closed to hold together to form by axis hole ball half raceway that the circular ring type semi-circular section groove of corresponding setting on the big axis hole hole wall of gear wheel forms.Be provided with rubber seal 30 between gear wheel and bit leg, stud with carbide button 10 on the gear wheel 20, during rock bit work, gear wheel 20 rotatablely moves around big axle journal of bit leg and pilot pin, makes the carbide button 20 in turn broken rocks on the gear wheel carry out oil drilling or geological prospecting borehole.
When adopting sliding bearing structure to connect, bit leg journel directly contacts with the gear wheel axis hole, contact area is big, can bear very big drilling pressure, but bit leg journel and the sliding friction of gear wheel axis hole aggravation produces high temperature under high rotating speed, makes the wearing and tearing of gear wheel axis hole become big, very fast inefficacy, so sliding bearing is not suitable for high rotating speed drilling well.Fig. 1 is the existing partial structurtes schematic diagram that adopts the rock bit of rolling bearing structure and locking roll structure.As shown in the figure, be provided with ring raceway 90 in big 21 inwall ring weeks of axis hole of gear wheel, the big axle journal 41 of bit leg is the slick and sly face of cylinder, there is not ring raceway, so the circle cylindrical rollers 50 in the raceway just becomes sliding friction and is rolling friction, solved the skimming wear problem of sliding friction, be fit to high rotating speed, but there is not locking function, the technological deficiency that adopts this rolling bearing structure to bring is: (1) is owing to be provided with locking ball 6 in big axle journal 41 ends, therefore taken certain space, the length of cylindrical rollers 50 is restricted, the length of existing cylindrical rollers is generally less than 20mm; (2) cylindrical rollers 50 has reduced the contact area of big axle journal 41 of bit leg and the big axis hole 21 of gear wheel; (3) both ends of the surface of cylindrical rollers 50 are the plane, and the sharp seamed edge of end face is concentrated along being easy to generate stress; Therefore make the structure that has the rock bit that adopts the rolling bearing connected mode now high pressure resistant, impact resistance is poor, is not suitable for the high pressure and deep well drillng operation.
The utility model content
Main purpose of the present utility model is at the problems referred to above, and the rock bit of existing rolling bearing structure is improved, and a kind of high pressure resistant and impact resistant roller bit with high rotating speed is provided.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of high pressure resistant and impact resistant roller bit with high rotating speed, comprise gear wheel, bit leg, bit leg is provided with big axle journal and pilot pin, the gear wheel correspondence is provided with big axis hole and little axis hole, the big axis hole of gear wheel and little axis hole are set on the big axle journal and pilot pin of bit leg, and be connected with the bit leg rolling friction by the roller that is flush-mounted in the raceway, it is characterized in that extending to axle journal half raceway that the axle journal toroidal cavity near big axle journal end forms being provided with in described big axle journal external surface ring week by width, corresponding axis hole half raceway that forms by the axis hole toroidal cavity that is provided with on big axis hole hole wall with axle journal half raceway, described raceway is formed by axle journal half raceway and axis hole half raceway closure, and described roller is the extended type roller that is flush-mounted in this raceway.
The both ends of the surface of described roller are curved surface, and the sidewall of the toroidal cavity on described gear wheel and the bit leg is the curved surface sidewall corresponding with described curved surface.
Described roller is provided with the cavity that runs through cylinder.
Described roller segment of a cylinder is evagination logarithmic curve or camber line.
The length of described extended type roller prolongs 10～15mm than existing roller.
The material of described roller is shock resistance bearing steel 55SiMoVA.
The beneficial effects of the utility model are: the utility model provides a kind of high pressure resistant and impact resistant roller bit with high rotating speed, be embodied in: the roller of lengthening has the rolling friction of bearing the drill bit dynamic loading simultaneously, locks gear wheel, improves multiple functions such as lubricating condition, the roller lifting surface area strengthens, the pressure of contact point reduces, make rock bit can bear bigger load, and avoid the appearance of weak part on the cone body, structure is more strong; The cavity roller has increased the roller flexibility, and it is lubricated to have improved system, and drill bit can be impacted by shock adaptive, increases the lubricating grease memory space, and it is lubricated to help bearing arrangement; The roller end face is a curved surface, has eliminated the roller two ends owing to the problem of stress concentration that sharp rib brings, and has improved the lubricating condition of friction part interdigit simultaneously, has also made things convenient for the installation of roller; Roller face bus adopts evagination logarithmic curve or camber line, and unbalance loading, overload phenomenon are reduced greatly, has increased the roller supporting capacity, has prolonged bearing life; Especially, the roller material adopts shock resistance bearing steel 55SiMoVA, and its toughness is significantly improved, and load holding capacity of the present utility model is more than 1.6 times of prior art, is applicable to the high pressure and deep well drillng operation.
Description of drawings
Fig. 1 is the existing partial structurtes schematic diagram that adopts the rock bit of rolling bearing syndeton and locking roll structure;
Fig. 2 is a whole cross-sectional view of the present utility model;
Fig. 3 is the cross-sectional view of gear wheel of the present utility model, bit leg coupling part;
Fig. 4 is the cross-sectional view of the utility model roller.
Among the figure: 1 carbide button, 2 gear wheels, 23 big axis holes, 24 little axis holes, 3 rubber seal, 4 bit legs, 43 big axle journals, 44 pilot pins, 5 rollers, 51 roller end faces, 52 roller cylinders, 53 roller cavitys, 6 locking balls, 7 oil supply systems, the contact surface (stress surface) of axis hole raceway and roller end face during the locking of 81 gear wheels, the contact surface (stress surface) of axle journal raceway and roller end face during the locking of 82 gear wheels, 9 raceways, 91 axle journal raceways, 92 axis hole raceways; 10 carbide buttons, 20 gear wheels, 21 big axis holes, 22 little axis holes, 30 rubber seal, 40 bit legs, 41 big axle journals, 42 pilot pins, 50 cylindrical rollers, 60 ball ring rings, 90 raceways.
Below in conjunction with drawings and Examples the utility model is described in detail.
The specific embodiment
Fig. 2～Fig. 4 illustrates a kind of high rotating speed impact resistant roller bit, comprise the gear wheel 2, the bit leg 4 that stud with carbide button 1, bit leg 4 is provided with big axle journal 43 and pilot pin 44, gear wheel 2 correspondences are provided with big axis hole 23 and little axis hole 24, the big axis hole 23 of gear wheel and little axis hole 24 are set on the big axle journal 43 and pilot pin 44 of bit leg, and be connected with bit leg 4 rolling friction by the roller 5 that is flush-mounted in the raceway 9, also be provided with oil supply system 7, rubber seal 3 on the bit leg 4.
As Fig. 2, shown in Figure 3, of the present utility model being characterised in that being provided with in above-mentioned big 43 external surface ring weeks of axle journal by width extends to axle journal half raceway 91 that the axle journal toroidal cavity near big axle journal 43 ends forms, on big axis hole 23 hole walls with axle journal half raceway 91 corresponding axis hole half raceways 92 that form by the axis hole toroidal cavity that are provided with, above-mentioned raceway 9 is by axle journal half raceway 91 and axis hole half raceway 92 closed formation, and above-mentioned roller 5 is for being flush-mounted in the extended type roller in this raceway.Here, the length of extended type roller 5 prolongs 10～15mm than existing roller.
The both ends of the surface 51 of above-mentioned roller are curved surface, and the sidewall of the toroidal cavity on above-mentioned gear wheel 2 and the bit leg 4 is the curved surface sidewall corresponding with this curved surface, also are that the sidewall of axis hole half raceway 92 and axle journal half raceway 91 is a curved surface.The end face 51 of roller 5 is a sphere in the present embodiment, and axis hole half raceway 92 on the gear wheel 2 and the sidewall of axle journal half raceway 91 on the bit leg 4 are the sphere sidewall corresponding with this sphere.
Above-mentioned roller 5 is provided with the cavity 53 that runs through cylinder.In the present embodiment, cavity 53 is formed by the slotted hole that passes cylinder vertically.The bus of roller cylinder 52 is evagination logarithmic curve or camber line.The roller segment of a cylinder is a camber line in this example, and the material of roller 5 is shock resistance bearing steel 55SiMoVA.
Operating principle of the present utility model
The utility model has improved high pressure resistant, the shock-resistant characteristic of rock bit adopting under the suitable high-revolving rolling bearing syndeton prerequisite by adopting above-mentioned embodiment.Make a concrete analysis of its operating principle below.
(1) the utility model removes locking ball 6 structures in the prior art, its locking function is appended on the roller 5, because the annulus raceway 60 of locking ball 6 respectively accounts for half on the big axis hole 21 of the big axle journal 41 of bit leg 40 and gear wheel 20, so locking ball 6 could be locked in gear wheel on the bit leg; For making roller 5 also possess locking function, with the annulus raceway of roller 5 by in the prior art only on gear wheel 20 big axis holes ring be provided with the indent ring raceway week, do not establish on the big axle journal that raceway changes the big axle journal of bit leg into and the big axis hole of gear wheel respectively accounts for half raceway.As Fig. 2～shown in Figure 3, roller 5 is locked palm of roller bits by axle journal raceway 91 on the bit leg 4 and the axis hole raceway 92 on the gear wheel 2, has substituted locking ball 6 locking mechanisms among Fig. 1.Owing to removed ball road, so the roller path 9 in the utility model can be widened, may extend into the close big axle journal end position of original locking ball 6, also promptly, the length of roller 5 can be extended on existing roller length basis, can be than existing cylindrical rollers 50 lengthening 10mm～15mm, can reach more than the 30mm, thereby strengthened the lifting surface area of roller 5, reduced the pressure of contact point, made rock bit can bear bigger load.The rolling friction that the utility model has roller 5 to bear the drill bit dynamic loading simultaneously, lock gear wheel, improve multiple functions such as lubricating condition.Make the degree of depth of roller path on gear wheel 2 bodies become original half simultaneously, make cone body cross section thickening, avoided the appearance of weak part, structure is more strong.
(2) as shown in Figure 3, Figure 4, roller 5 is provided with the cavity 53 that runs through cylinder, has increased the roller flexibility, and it is lubricated to have improved system.Drill bit can be impacted by shock adaptive, and hollow roller 5 can have more lubricating grease memory space, and the big more bearing temperature of load is high more, and lubricating grease is gushed out many more, and it is lubricated to help bearing arrangement.
(3) end face of roller 5 two planar ends that will have cylindrical rollers 50 now change curved surface 51 into, toroidal cavity on gear wheel 2 and the bit leg 4 is the also corresponding curved surface sidewall that changes into of sidewall of axis hole half raceway 92 and axle journal half raceway 91 simultaneously, like this when roller locking gear wheel, the contact site of axis hole raceway 92 and roller end face is that the contact site of force part 81 and axle journal raceway 91 and roller end face is contacting by original face contact becoming line contact of force part 82, the roller two ends have been eliminated because the stress that sharp rib brings is concentrated, improve the lubricating condition of friction part interdigit simultaneously, also made things convenient for the installation of roller.
(4) bus of roller 5 cylinders 52 adopts evagination logarithmic curve or camber line." edge effect " of roller is meant that cylindrical roller produces stretcher strain under dynamic loading and big pressure, and the roller mid portion attenuates, and makes the load major part act on the roller two ends, and fatigue failure at first takes place at the roller two ends.The utility model changes over evagination logarithmic curve or camber line with the roller bus by straight line, is about to roller and makes thin ends and thick middle profile, and unbalance loading, overload phenomenon are reduced greatly, has increased the roller supporting capacity, has prolonged bearing life.
(5) for guaranteeing the intensity of improved roller, roller 5 has adopted shock resistance bearing steel 55SiMoVA, and the GCr15 that the existing roller of its toughness adopts after the heat treatment improves several times.
The above only is a preferred embodiment of the present utility model, is not shape material of the present utility model and structure are done any pro forma restriction.Every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (6)
1. high pressure resistant and impact resistant roller bit with high rotating speed, comprise gear wheel, bit leg, bit leg is provided with big axle journal and pilot pin, the gear wheel correspondence is provided with big axis hole and little axis hole, the big axis hole of gear wheel and little axis hole are set on the big axle journal and pilot pin of bit leg, and be connected with the bit leg rolling friction by the roller that is flush-mounted in the raceway, it is characterized in that extending to axle journal half raceway that the axle journal toroidal cavity near big axle journal end forms being provided with in described big axle journal external surface ring week by width, corresponding axis hole half raceway that forms by the axis hole toroidal cavity that is provided with on big axis hole hole wall with axle journal half raceway, described raceway is formed by axle journal half raceway and axis hole half raceway closure, and described roller is the extended type roller that is flush-mounted in this raceway.
2. high pressure resistant and impact resistant roller bit with high rotating speed according to claim 1, the both ends of the surface that it is characterized in that described roller are curved surface, the sidewall of the toroidal cavity on described gear wheel and the bit leg is the curved surface sidewall corresponding with described curved surface.
3. high pressure resistant and impact resistant roller bit with high rotating speed according to claim 2 is characterized in that described roller is provided with the cavity that runs through cylinder.
4. according to claim 2 or 3 described high pressure resistant and impact resistant roller bit with high rotating speed, it is characterized in that described roller segment of a cylinder is evagination logarithmic curve or camber line.
5. high pressure resistant and impact resistant roller bit with high rotating speed according to claim 1 is characterized in that the length of described extended type roller prolongs 10～15mm than existing roller.
6. high pressure resistant and impact resistant roller bit with high rotating speed according to claim 1, the material that it is characterized in that described roller are shock resistance bearing steel 55SiMoVA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201984607U CN201679448U (en) | 2010-05-20 | 2010-05-20 | High rotating speed high pressure resistant impact-resistance roller bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201984607U CN201679448U (en) | 2010-05-20 | 2010-05-20 | High rotating speed high pressure resistant impact-resistance roller bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201679448U true CN201679448U (en) | 2010-12-22 |
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ID=43344496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201984607U Expired - Fee Related CN201679448U (en) | 2010-05-20 | 2010-05-20 | High rotating speed high pressure resistant impact-resistance roller bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201679448U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812970A (en) * | 2010-05-20 | 2010-08-25 | 天津立林钻头有限公司 | High pressure resistant and impact resistant roller bit with high rotating speed |
| RU2549631C2 (en) * | 2013-08-20 | 2015-04-27 | Открытое акционерное общество "Волгабурмаш" (ОАО "Волгабурмаш") | Cone bit support |
| EP2990588A1 (en) * | 2014-08-28 | 2016-03-02 | Sandvik Intellectual Property AB | By-pass fluid passageway for drill bit |
| CN108360979A (en) * | 2018-05-22 | 2018-08-03 | 西南石油大学 | Split type single-cone rotary drill bit |
-
2010
- 2010-05-20 CN CN2010201984607U patent/CN201679448U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812970A (en) * | 2010-05-20 | 2010-08-25 | 天津立林钻头有限公司 | High pressure resistant and impact resistant roller bit with high rotating speed |
| RU2549631C2 (en) * | 2013-08-20 | 2015-04-27 | Открытое акционерное общество "Волгабурмаш" (ОАО "Волгабурмаш") | Cone bit support |
| EP2990588A1 (en) * | 2014-08-28 | 2016-03-02 | Sandvik Intellectual Property AB | By-pass fluid passageway for drill bit |
| CN106661923A (en) * | 2014-08-28 | 2017-05-10 | 山特维克知识产权股份有限公司 | By-pass fluid passageway for drill tool |
| US10626677B2 (en) | 2014-08-28 | 2020-04-21 | Sandvik Intellectual Property Ab | By-pass fluid passageway for drill tool |
| CN108360979A (en) * | 2018-05-22 | 2018-08-03 | 西南石油大学 | Split type 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 | ||
| 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: 20101222 Termination date: 20160520 |