CN2763460Y - Roller bit adopting rolling ball locking bearing - Google Patents
Roller bit adopting rolling ball locking bearing Download PDFInfo
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- CN2763460Y CN2763460Y CN 200520033096 CN200520033096U CN2763460Y CN 2763460 Y CN2763460 Y CN 2763460Y CN 200520033096 CN200520033096 CN 200520033096 CN 200520033096 U CN200520033096 U CN 200520033096U CN 2763460 Y CN2763460 Y CN 2763460Y
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- bearing
- journal bearing
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- ball
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Abstract
The utility model relates to a roller bit adopting a rolling ball locking bearing, which is composed of one or more tooth claws, roller cones, a bearing system, teeth, oil storage bags, nozzles, etc., wherein the roller cones are correspondingly connected with the tooth claws; the bearing system is connected with the tooth claws and the roller cones; the teeth are inlaid on the roller cones for cutting rocks; the oil storage bags and the nozzles are arranged on the tooth claws; the bearing system is composed of a big radial bearing, the rolling ball locking bearing, a thrust bearing and a small radial bearing. The utility model is characterized in that the rolling ball locking bearing is positioned at the middle of the big radial bearing; the big radial bearing is divided into a first radial bearing approaching to a sealing ring and a second radial bearing approaching to the thrust bearing. A special structure of the utility model enables the bearing system to have the advantages of high bearing capacity, good lubrication state and reasonable load distribution, also increases the welding area and quality of abrasion-proof belts on the tips of the tooth claws, and effectively improves the operating performance and the service life of the roller bit.
Description
Technical field
The utility model relates to the rock bit of using in oil, the gas drilling, particularly relates to a kind of rock bit that adopts the Cylinder lock with ball mandrel to hold, and can improve service behaviour and the application life of rock bit in the shaft bottom.
Background technology
Rock bit mainly be by one or more tooth pawls, the gear wheel that links to each other with corresponding tooth pawl, connect tooth pawl and gear wheel bearing arrangement, be embedded in be used on the gear wheel rock cutting tooth, be installed in oil storage bag on the tooth pawl, and be installed in nozzle on the tooth pawl etc. and partly form, gear wheel is fixed on the tooth pawl by the locking device in the bearing arrangement.Mainly be that the life-span by bearing arrangement is determined the application life of rock bit.Therefore, the quality of its bearing arrangement is directly determining the quality of drill bit.In the drilling well industry, especially in the drilling process of deep-well, the life-span of rock bit is the bottleneck of its economic benefit of restriction.At present, the rock bit that drilling well is used, its life-span can not be satisfied the needs of drilling well far away.In the use of drill bit, rock bit is installed in the lower end of drilling rod, and the broken required load of rock is applied on the tooth pawl of drill bit by drilling rod, passes to gear wheel by bearing arrangement again, makes the tooth that is embedded on the gear wheel carry out fragmentation to rock.Therefore, the load that the cone bit bearing system is born is huge, and rate of wear is very fast in the course of the work to make it.Rock bit in the course of the work, it lubricates and is lubricated by the sliding agent that is stored in advance in the oil storage bag fully, because the restriction of existing bearing arrangement, sliding agent is that the passage when ball is installed enters bearing arrangement, make and have now in the cone bit bearing system, undesirable from the position lubricating status that ball grooves is far away, this has just further quickened the wearing and tearing in the course of the work of its bearing arrangement, has shortened the application life of whole drill bit.
Chinese patent 02252182.8,01212693.4,00229763.9,00230276.4 in, respectively in big sliding bearing place design and installation have wear-resistant (lining) of carbide alloy to overlap (to call floating bushing in the following text), improved the application life of sliding bearing, but because the special lubricating system of rock bit, make in the sliding bearing that floating bushing external surface and gear wheel endoporus constitute, sliding agent can only flow into the contact surface of this bearing from an end face (near an end of ball) of floating bushing, therefore it can not get lubricated fully, reduce the service behaviour of whole bearing arrangement, thereby shortened the application life of rock bit.In the structure of existing ball locking such as above-mentioned Chinese patent and U.S. Pat 6725947, US6176331, US5148879, US4747604 rock bit, ball is to pack into from the circular hole of tooth pawl back near pawl point position, again with welding after the corresponding lock clasp.In the actual well drilled process, because the pawl of tooth pawl point position diameter is bigger, may directly contact with the borehole wall, cause wearing and tearing, down-hole accident can take place when serious.Therefore, present rock bit is all applied the certain thickness antifriction alloy of weldering at the pawl point place of tooth pawl, to strengthen the anti-wear performance at pawl point place.Because the circular hole that ball is installed is also in this position, and the bearing pin of locking ball need be welded on the tooth pawl, and this has just reduced the long-pending and quality of the deposited face of weld of wear-resisting band on the shirt-tail, and the rate of wear of tooth pawl pawl point is very fast.
The utility model content
The purpose of this utility model is to provide a kind of rock bit that adopts the Cylinder lock with ball mandrel to hold, and can improve the service behaviour and the application life of rock bit effectively.
The technical scheme that its technical problem that solves the utility model adopts is: change Cylinder lock with ball mandrel holds the position in the cone bit bearing system, a segment distance is moved toward gear claw journal baseplane direction in the position of ball grooves, big sliding bearing originally is divided into second journal bearing near first journal bearing of sealing ring and close thrust bearing, be distributed in the both sides of ball bearing, sliding agent flows into ball bearing through the ball installing hole from oil storage bag, flow into the sliding bearing that is positioned at the ball bearing both sides respectively by ball bearing again, sliding bearing is lubricated.
A kind of rock bit that adopts the Cylinder lock with ball mandrel to hold, by one or more tooth pawls, the gear wheel that links to each other with corresponding tooth pawl, the bearing arrangement that connects tooth pawl and gear wheel, be embedded in and be used for the tooth of rock cutting on the gear wheel, be installed in oil storage bag on the tooth pawl and be installed in nozzle on the tooth pawl etc. and partly form, described bearing arrangement is by big journal bearing, the Cylinder lock with ball mandrel holds, thrust bearing and path are formed to bearing, it is characterized in that, the position that described Cylinder lock with ball mandrel holds is in the centre of big journal bearing, and big journal bearing is divided near first journal bearing of sealing ring and second journal bearing of close thrust bearing.
The utility model Cylinder lock with ball mandrel holds original big bush(ing) bearing is divided into two, be distributed in the both sides that the Cylinder lock with ball mandrel holds, the equal diameters of first journal bearing and second journal bearing, or the axial length of second journal bearing is not less than 0.25 times of first journal bearing axial length, and first journal bearing and second journal bearing can be made up of the various combination of floating ring bearing and plain bearing.
The utility model when mounted, ball is by the opening ball grooves of packing in the ball installing hole at tooth pawl back, tooth pawl back is near the deposited antifriction alloy that is welded with of the surface portion of pawl point, since move on the ball grooves position make installing hole at the opening at tooth pawl back away from the pawl point, increased the bonding area of antifriction alloy.
Compared with prior art, the beneficial effects of the utility model are: the Cylinder lock with ball mandrel holds the change of position in the cone bit bearing system, the big journal bearing that bears main load in the former bearing system is divided into two, changed the distribution of load, make the stress distribution of bearing arrangement more even, improve the service behaviour of bearing, increased the supporting capacity of bearing; The inlet that simultaneously sliding agent is flowed into big journal bearing also is increased to 2, can improve the lubricating status of big journal bearing effectively; Because the position that the Cylinder lock with ball mandrel holds changes, also to moving away from tooth pawl pawl point direction, the applied face of weld that has increased wear-resisting band on the tooth pawl pawl point is long-pending simultaneously in the position of ball installing hole, has also reduced the influence of the welding of locking bearing pin to the welding quality of wear-resisting band; In a word, new pattern rolling ball provided by the utility model is locked the cone bit bearing system, make the bearing arrangement of rock bit have higher supporting capacity, better lubricating status, more rational load distribution, increase the long-pending and quality of the deposited face of weld of wear-resisting band on the shirt-tail, the service behaviour and the application life of improving rock bit.
Description of drawings
Fig. 1 is a rock bit overall schematic that adopts the Cylinder lock with ball mandrel to hold;
Fig. 2-Fig. 4 is the local enlarged diagram of 3 kinds of form of structure of the utility model bearing arrangement;
Among the figure: the 1-oil storage bag, 2-tooth pawl, 3-sliding agent runner, 4-ball installing hole, the 5-sealing ring, 6-Cylinder lock with ball mandrel holds, 7-tooth, 8-nozzle, 9-gear wheel, 10-thrust bearing, first journal bearing of 11-, second journal bearing of 12-
The specific embodiment
Referring to Fig. 1, rock bit by one or more tooth pawls 2 (being generally or three), by the Cylinder lock with ball mandrel hold 6 and bearing arrangement be connected gear wheel 9 on the corresponding tooth pawl, be embedded in and be used for the tooth 7, oil storage bag 1, nozzle 8 etc. of rock cutting on the gear wheel and form.Ball enters bearing by the ball installing hole 4 of tooth pawl back when mounted, the axial location of fixed-cutter on gear claw journal.Lubricant reservoir is in oil storage bag 1, because the effect of mud pressure makes sliding agent enter ball installing hole 4 through runner 3 from oil storage bag 1, enter ball bearing by ball installing hole 4 again during work, and, flow into and held the journal bearing that is divided into two by the Cylinder lock with ball mandrel along with the rotation of gear wheel.The position that the Cylinder lock with ball mandrel holds is in the centre of big journal bearing, big journal bearing is divided near first journal bearing of sealing ring 5 and second journal bearing of close thrust bearing 10, the equal diameters of first journal bearing and second journal bearing, the axial length of second journal bearing are not less than 0.25 times of first journal bearing axial length.When mounted, ball is by the opening ball grooves of packing in the ball installing hole at tooth pawl back, tooth pawl back is applied near the surface portion of pawl point and is welded with antifriction alloy and since the ball grooves position on move make installing hole at the opening at tooth pawl back away from the pawl point, increased the bonding area of antifriction alloy.
Fig. 2, Fig. 3, Fig. 4 are 3 kinds of typical structures of the present utility model, and first journal bearing and second journal bearing are made up of the various combination of floating ring bearing and plain bearing.In Fig. 2, first journal bearing 11 and second journal bearing 12 have adopted floating ring bearing, are distributed in the both sides of ball bearing 6, and floating ring bearing helps further improving rotating speed and the supporting capacity that bearing arrangement can bear.In Fig. 3, first journal bearing 11 and second journal bearing 12 adopt plain bearing, and thrust bearing 10 adopts common process that pad is not installed, and processing technology is simple.In Fig. 4, adopt floating ring bearing in first journal bearing 11, and second journal bearing 12 adopts plain bearing, reduced difficulty of processing, also guaranteed the supporting capacity and the service behaviour of bearing arrangement simultaneously.
Claims (4)
1. rock bit that adopts the Cylinder lock with ball mandrel to hold, by one or more tooth pawls (2), the gear wheel (9) that links to each other with corresponding tooth pawl, the bearing arrangement that connects tooth pawl and gear wheel, be embedded in and be used for the tooth (7) of rock cutting on the gear wheel, the parts such as nozzle (8) that are installed in oil storage bag on the tooth pawl (1) and are installed on the tooth pawl are formed, described bearing arrangement is by big journal bearing, the Cylinder lock with ball mandrel holds (6), thrust bearing (10) and path are formed to bearing, it is characterized in that, the position that described Cylinder lock with ball mandrel holds is in the centre of big journal bearing, and big journal bearing is divided near first journal bearing (11) of sealing ring (5) and second journal bearing (12) of close thrust bearing (10).
2. by the rock bit described in the claim 1, it is characterized in that the equal diameters of first journal bearing (11) and second journal bearing (12).
3. by the rock bit described in the claim 1, it is characterized in that the axial length of second journal bearing (12) is not less than 0.25 times of first journal bearing (11) axial length.
4. by the rock bit described in the claim 1,2,3, it is characterized in that first journal bearing (11) and second journal bearing (12) are made up of the various combination of floating ring bearing and plain bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033096 CN2763460Y (en) | 2005-02-01 | 2005-02-01 | Roller bit adopting rolling ball locking bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033096 CN2763460Y (en) | 2005-02-01 | 2005-02-01 | Roller bit adopting rolling ball locking bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2763460Y true CN2763460Y (en) | 2006-03-08 |
Family
ID=36141006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520033096 Expired - Fee Related CN2763460Y (en) | 2005-02-01 | 2005-02-01 | Roller bit adopting rolling ball locking bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2763460Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291220A (en) * | 2013-06-05 | 2013-09-11 | 西南石油大学 | Roller bit bearing with sleeves at internally-fixed and externally-floating end |
| CN105545208A (en) * | 2016-02-22 | 2016-05-04 | 成都优拓优联科技有限公司 | Lock ring with close threads |
-
2005
- 2005-02-01 CN CN 200520033096 patent/CN2763460Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291220A (en) * | 2013-06-05 | 2013-09-11 | 西南石油大学 | Roller bit bearing with sleeves at internally-fixed and externally-floating end |
| CN105545208A (en) * | 2016-02-22 | 2016-05-04 | 成都优拓优联科技有限公司 | Lock ring with close threads |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060308 Termination date: 20100201 |