CN2424294Y - Tri-cone rotary drill bit with sliding bushing bearing structure - Google Patents
Tri-cone rotary drill bit with sliding bushing bearing structure Download PDFInfo
- Publication number
- CN2424294Y CN2424294Y CN 00229763 CN00229763U CN2424294Y CN 2424294 Y CN2424294 Y CN 2424294Y CN 00229763 CN00229763 CN 00229763 CN 00229763 U CN00229763 U CN 00229763U CN 2424294 Y CN2424294 Y CN 2424294Y
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- CN
- China
- Prior art keywords
- floating bush
- slide bushing
- bushing
- tri
- rock bit
- Prior art date
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- Expired - Lifetime
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Abstract
The utility model relates to a tri-cone drill bit with sliding bushing bearing structure, comprising a tri-cone and a bit leg, wherein, a sliding lining is arranged on the connecting bearing position between the tri-cone and the bit leg; comprising a tri-cone and a bit leg, wherein, a sliding lining is arranged on the connecting bearing position between the tri-cone and the bit leg; one layer of sulfurizing layer is seeped on one or a plurality of surfaces of the sliding lining. The thickness of the sulfurizing layer of the utility model is from 0.001 mm to 0.30 mm. Through alloy steel with good high temperature resistant mechanical property is used as the base of the sliding lining, and one layer solid lubrication layer containing metallic sulfide is seeped and cover on the surface thereof, compared with a present tri-cone drill bit with a sliding lining, the utility model can further improve the aspects of high temperature resistant performance, high-pressure abrasion resistant, anti-engagement performance, bearing capacity, etc.
Description
The utility model relates to the rock bit of using in a kind of petroleum gas, mine and the geological drilling, comprise tricone bit, two gear wheels, single cone and polydonita wheel drill bit, particularly relate to the slide bushing bearing arrangement rock bit that a kind of surface has sulphide layer.
Rock bit mainly is made up of gear wheel and bit leg two large divisions, and gear wheel and bit leg engage by their bearing portion, at their bearing portion joint the rock bit that slide bushing promptly constitutes the slide bushing bearing arrangement is set.Slide bushing is from cooperating and user mode is divided into two kinds of floating bush and stationary bushings, owing to the slide bushing especially rock bit of floating bush bearing structure has the characteristic of anti-high the pressure of the drill, heavily stressed, high drilling speed, used more widely at present.Above-mentioned this class slide bushing is normally selected self-lubricating property, heat dispersion, and all good nonferrous materials is made.The Reed company of the U.S. just successfully is used for the bronzing material floating bush of rock bit as far back as the seventies, and in sleeve surface brush plating Ag, Pb successively, In coating (seeing US4074922 for details), in addition, in recent years, two road thrust plate materials of bearing portion have been adopted to contain to bore be the high nickel steel of 18-25%, its hardness is HRC50-55.Slide bushing element in the U.S. Smith company rock bit changes CuNiSn (Spinodal) material from the eighties into by original aluminium bronze, and the processing of brush plating silver bite-resistant has been carried out on the surface, has also all obtained effect preferably.Yet, strengthen the development of drilling technology direction towards high rotating speed, high the pressure of the drill along with modern drilling technology, require rock bit to possess higher PV value, the slide bushing that beryllium-bronze, CuNiSn alloy, aluminium bronze are made produces high friction and high heat under the PV value that raises day by day, when temperature surpasses 269 ℃, the yield strength of these alloys descends rapidly, and the metal brush-plating layer on surface can produce the intensity reduction and axle temperature surpasses fusing point and causes the coating disabler, and the further raising of rock bit performance is restricted.
The slide bushing bearing arrangement rock bit that the purpose of this utility model is to provide a kind of both high temperature resistant at the problem of above-mentioned proposition, the high pressure lubricity is good, possess higher PV value.
The technical scheme that realizes the utility model purpose is as follows: include gear wheel 1, bit leg 2, the bearing portion that engages at palm of roller bits is provided with slide bushing, and its difference is that one or more surfaces of described slide bushing are impregnated with one deck sulphide layer.
Press such scheme, slide bushing of the present utility model comprises floating bush and stationary bushing; Floating bush and each fitting face of cone bit bearing position are matched in clearance, floating bush comprise in macro-axis floating bush, little axle floating bush, one thrust plate, two road thrust plates, the unsteady cap of little axle (little axle floating bush is combined as a whole with thrust plate), the L type floating bush (little floating bush and two road thrust plates be combined as a whole) any one or a plurality of; The some fitting faces of stationary bushing and cone bit bearing position (hole or axle) be interference fit, stationary bushing comprise in macro-axis stationary bushing, little axle stationary bushing, little locking cap, the L type stationary bushing any one or a plurality of.Slide bushing is made by the alloy steel products of high strength, high rigidity, high tenacity, high resiliency and tool high-temperature resistant mechanical property, and sulphide layer can be processed by the low temperature ion sulfuration technology, and the thickness of sulphide layer is 0.001-0.30mm.Sulphide layer is formed by metal sulfide, also can contain a spot of metal oxide.
The utility model oozes the solid lubricant layer that one deck contains metal sulfide by the alloy steel products that will have good high temperature resistant mechanical property as the matrix of slide bushing and on its surface, because sulphide layer has good self-lubricating property and bite-resistant performance, and good binding intensity is arranged with matrix surface, thereby make slide bushing still keep high strength and high rigidity and good bite-resistant performance, thereby make that also can adapt to the appearance that higher the pressure of the drill, higher rotating speed operating mode promptly have the rock bit of higher PV value becomes possibility in the condition of high temperature.Test shows, the utility model than existing glide lining rock bit in high temperature resistant, high pressure wearing and tearing, bite-resistant performance, supporting capacity and application life the aspect further raising is all arranged.
Fig. 1 is the sectional structure chart of an embodiment of the utility model.
Fig. 2 is the sectional structure chart of another embodiment of the utility model.
An embodiment of the present utility model as shown in Figure 1, be a kind of floating bush bearing structure rock bit, include gear wheel 1 and bit leg 2, gear wheel and bit leg engage by their bearing portion, the bearing portion that engages at palm of roller bits is installed on floating bush, comprise macro-axis floating bush 3, two road thrust plates 4, little axle floating bush is combined as a whole into the unsteady cap 5 of little axle with thrust plate, above-mentioned this this floating bush is made by high strength steel 4Cr5MoSiV1 (the H13 steel is equivalent to betray one's country), through heat treatment, after the fine finishining, clean, advance stove then and carry out the sulfurizing processing of low-temperature ion surface, treatment temperature 160-190 ℃, the sulfurizing medium is H
2S and CS
2Or be the bright sulfur steam, processing time 6-8 hour, form the sulphide layer that a layer thickness is 0.02-0.04mm on the surface of each floating bush, in addition, also be provided with sealing ring 7 at the joint of palm of roller bits, palm of roller bits is axially locked by locking element 7.
Second embodiment of the utility model as shown in Figure 2, it is to be installed on the L type floating bush 8 that macro-axis floating bush 3, two road thrust plates and little axle floating bush are combined as a whole at the bearing portion that palm of roller bits engages with the main difference part of a last embodiment.
Claims (7)
1, a kind of slide bushing bearing arrangement rock bit includes gear wheel (1), bit leg (2), and the bearing portion that engages at palm of roller bits is provided with slide bushing, it is characterized in that one or more surfaces of described slide bushing are impregnated with one deck sulphide layer.
2, by the described slide bushing bearing arrangement of claim 1 rock bit, it is characterized in that slide bushing made by alloy steel products, sulphide layer thickness is 0.001-0.30mm.
3, by claim 1 or 2 described slide bushing bearing arrangement rock bit, it is characterized in that slide bushing comprises floating bush and stationary bushing.
4, by the described slide bushing bearing arrangement of claim 3 rock bit, it is characterized in that described floating bush comprise in macro-axis floating bush, little axle floating bush, one thrust plate, two road thrust plates, the unsteady cap of little axle, the L type floating bush any one or a plurality of.
5, by the described slide bushing bearing arrangement of claim 3 rock bit, it is characterized in that stationary bushing comprise in macro-axis stationary bushing, little axle stationary bushing, little axle locking cap, the L type stationary bushing any one or a plurality of.
6, by the described slide bushing bearing arrangement of claim 4 rock bit, it is characterized in that being installed on macro-axis floating bush (3), two road thrust plates (4), little axle unsteady cap (5) at the bearing portion that palm of roller bits engages, macro-axis floating bush, two road thrust plates, the unsteady cap of little axle are made by high strength steel 4Cr5MoSiV1, and the surface of each floating bush forms the sulphide layer that a layer thickness is 0.02-0.04mm.
7, by the described slide bushing bearing arrangement of claim 4 rock bit, it is characterized in that being installed on macro-axis floating bush (3), L type floating bush (8) at the bearing portion that palm of roller bits engages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00229763 CN2424294Y (en) | 2000-04-24 | 2000-04-24 | Tri-cone rotary drill bit with sliding bushing bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00229763 CN2424294Y (en) | 2000-04-24 | 2000-04-24 | Tri-cone rotary drill bit with sliding bushing bearing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2424294Y true CN2424294Y (en) | 2001-03-21 |
Family
ID=33592993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00229763 Expired - Lifetime CN2424294Y (en) | 2000-04-24 | 2000-04-24 | Tri-cone rotary drill bit with sliding bushing bearing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2424294Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892807A (en) * | 2010-08-10 | 2010-11-24 | 天津立林石油机械有限公司 | Cone bit for high-speed and high-temperature drilling |
| CN113217532A (en) * | 2021-05-31 | 2021-08-06 | 中石化江钻石油机械有限公司 | Bearing with high bearing and high wear resistance and machining method thereof |
-
2000
- 2000-04-24 CN CN 00229763 patent/CN2424294Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892807A (en) * | 2010-08-10 | 2010-11-24 | 天津立林石油机械有限公司 | Cone bit for high-speed and high-temperature drilling |
| CN113217532A (en) * | 2021-05-31 | 2021-08-06 | 中石化江钻石油机械有限公司 | Bearing with high bearing and high wear resistance and machining method thereof |
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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 |
Granted publication date: 20010321 |