CN1065507A - Hard-alloy roller-type bit with sliding bearings - Google Patents
Hard-alloy roller-type bit with sliding bearings Download PDFInfo
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- CN1065507A CN1065507A CN 91101825 CN91101825A CN1065507A CN 1065507 A CN1065507 A CN 1065507A CN 91101825 CN91101825 CN 91101825 CN 91101825 A CN91101825 A CN 91101825A CN 1065507 A CN1065507 A CN 1065507A
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- hard
- alloy
- gear wheel
- sliding bearings
- tooth pawl
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Abstract
Hard-alloy roller-type bit with sliding bearings involved in the present invention can be widely used in departments such as oil, mine, and it has overcome, and existing journal bearing bit can not be worked under high rotating speed, not wear-resisting shortcoming.Journal bearing bit of the present invention mainly comprises tooth pawl axle, gear wheel slip cap, limit thrust ring and gear wheel, and the material of their each fricting working surface is carbonized tungsten and cobalt hard alloy.Compare with existing journal bearing bit the present invention have simple in structure, abrasion resistance is high, can bear high rotating speed, shock-resistant, advantage that cost is low.
Description
The present invention relates to a kind of rock bit, particularly relate to a kind of journal bearing bit, equal sintering or welding-on have carbonized tungsten and cobalt hard alloy (hereinafter to be referred as carbide alloy) on each fricting working surface of its bearing, constitute a kind of novel hard alloy journal bearing bit.
At present, the tooth pawl low-carbon alloy steel manufacturing of journal bearing bit, each fricting working surface of tooth pawl axle generally hardens with carburizing or boronising, the built-up welding one deck high-carbon cobalt chromium tungsten antifriction alloy on these surfaces that also has.Bit cone also is to use the low-carbon alloy steel manufacturing, and welding-on silver manganese alloy or other copper alloy are gone back in inside and outside each surface of gear wheel on each fricting working surface of endoporus except that boronising, forms a secondary hard sliding bearing to soft unlike material, and works under the seal lubrication condition.But the structure and the material of existing journal bearing bit can only be worked under the slow-speed of revolution, and bearing seal destroyed rapidly when rotating speed was high, and sand grains enters in the bearing in the drilling fluid, causes the wearing and tearing of bearing working face very soon.Therefore, the rotating speed of existing journal bearing bit is limited in below 150 rev/mins, and the rotating speed of mud motor is all than higher, so existing journal bearing bit can't be used to improve bit speed with mud motor.
For addressing the above problem, a kind of way is to improve the material and the structure of bearing seal, but practice for many years shows that the progress of this respect is very slow, and the amplitude that rotating speed improves is also little.Another way is the material that changes each fricting working surface of bearing, wherein propose to adopt man-made polycrystalline diamond composite sheet or polycrystalline diamond piece material, to improve the abrasion resistance and the rotating speed of bearing as the sliding bearing work plane as U.S. Patent application US4260203, US4756631 and UK Patent Application GB216873A.But the poor toughness of these materials, the machining and shaping difficulty is made rock bit cost height, so far still in the development stage.
The objective of the invention is to provide a kind of is that the carbide alloy of each fricting working surface material of bearing is to hard-alloy roller-type bit with sliding bearings with the carbonized tungsten and cobalt hard alloy, it can be worked under higher rotating speed than existing journal bearing bit, adapting to the high rotating speed of mud motor, or be issued to higher working life in same rotational speed.
The object of the present invention is achieved like this: sintering or welding-on one deck hard alloy blocks or hard alloy layer on each fricting working surface of rock bit tooth pawl axle, perhaps on tooth pawl axle, fix an axle sleeve with screw thread, sintering or welding-on one deck hard alloy blocks or hard alloy layer on its each fricting working surface, a limit thrust ring is fixed with screw thread in end at tooth pawl axle, sintering or welding-on one deck hard alloy blocks or hard alloy layer on an one end face, more than constitute the non-rotating structure of sliding bearing, what be complementary with tooth pawl axle is a gear wheel slip cap, sintering or welding-on one deck hard alloy blocks or hard alloy layer on its each fricting working surface, this is the rotating part of sliding bearing, and gear wheel then utilizes screw thread to be fixed on gear wheel slip cap outside.So just constitute hard-alloy roller-type bit with sliding bearings.
The present invention compare with existing journal bearing bit have simple in structure, abrasion resistance is high, can bear high-revolving advantage, and carbide alloy is more shock-resistant than polycrystalline diamond, cost is also low.Because the abrasion resistance height of carbide alloy, the present invention can be used for the non-tight journal bearing bit, equally also can be used for sealed sliding bearing roller bit.We simulate the condition of work of rock bit, in sand laden mud, done abrasion test, 40 millimeters of used carbide sliding bearing diameters, wide 13.7 millimeters, 86 millimeters of gear wheel external diameters, rotating speed are respectively 100 rev/mins, 200 rev/mins and 250 rev/mins, and the pressure of the drill is respectively 1,000 Ns, 2,000 Ns and 5,000 Ns.Turn round and record bearing diameter direction wear extent after 40 hours all less than 0.06 millimeter.Evidence, the non-tight carbide sliding bearing has very high abrasion resistance in sand laden mud.
Concrete structure of the present invention is provided by following examples and accompanying drawing thereof.
Fig. 1 is a seting welding carbide piece journal bearing bit sectional drawing, Fig. 2 is for applying weldering hard alloy layer journal bearing bit sectional drawing, Fig. 3 is a diminished shaft hard-alloy roller-type bit with sliding bearings sectional drawing, Fig. 4 is tape spool cover hard-alloy roller-type bit with sliding bearings sectional drawing, Fig. 5 is sealing hard-alloy roller-type bit with sliding bearings sectional drawing, and Fig. 6 is a gear wheel slip cap lateral view.
Fig. 1 is the sectional drawing of one group of tooth cat's paw wheel of non-tight hard-alloy roller-type bit with sliding bearings of the proposition according to the present invention, comprise tooth pawl axle 2, gear wheel slip cap 3, limit thrust ring 4 and gear wheel 5, and thrust ring end face hard alloy blocks 9, tooth pawl shaft shoulder portion and cylindrical hard alloy blocks 10, slip cap end face and endoporus hard alloy blocks 11.
During assembling, earlier gear wheel slip cap 3 is enclosed within on the tooth pawl axle 2, by screw thread 7 limit thrust ring 4 is tightened in the end of tooth pawl axle 2, the position with pad 6 adjustment thrust rings 4 is freely rotated slip cap 3, but is not had axial float on tooth pawl axle 2.Pass the hole (not drawing among the figure) of tooth pawl bottom with a straight pin, insert the blind hole (not drawing among the figure) of gear wheel slip cap 3 relevant positions, slip cap is temporary fixed, will be tightened on the gear wheel 5 on the slip cap 3 by screw thread 12, straight pin is taken out in fastening back. Screw thread 7 and 12 is right-handed thread, and that they are gone up more is tight more for frictional force in the work.
During work, the part drilling mud passes tooth pawl axle through tooth pawl hole 1, and the gap 8 between limit thrust ring 4 and gear wheel 5 is flow through between the carbide alloy rubbing surface, and 13 places discharge rock bit in the gap at last, play the effect of cooling and lubricating.
Fig. 2 is another embodiment that proposes according to the present invention, and it just applies weldering hard alloy layer replacement sintering or seting welding carbide piece with laser with shown in Figure 1 basic identical.Hard alloy layer can be one or more layers, and the composition of each layer can be different with hardness.
Fig. 3 is the another embodiment that proposes according to the present invention, and it is basic identical with Figure 1 and Figure 2, and just tooth pawl axle 2 is the conical surface with the fitting face of gear wheel slip cap 3, the thrust hard alloy blocks (layer) on the left of can saving like this.
Fig. 4 is an embodiment again who proposes according to the present invention, it and Fig. 1, Fig. 2 and shown in Figure 3 basic identical, just on tooth pawl axle 2, tighten up an axle sleeve 15 by screw thread 14, sintering or welding-on one deck hard alloy blocks or hard alloy layer 10 on its each fricting working surface, axle sleeve also can be illustrated in figure 3 as taper.
Fig. 5 is the sectional drawing of one group of tooth cat's paw wheel of sealing hard-alloy roller-type bit with sliding bearings of the proposition according to the present invention, it and Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4 basic identical, the sealing device that just between gear wheel and tooth pawl, has kept existing rock bit, i.e. " O " type rubber ring 16 and nylon ring 17, the drill bit oil storage cup is led in tooth pawl hole 1, is bearing supplemental lubrication fat.
Fig. 6 is the lateral view of gear wheel slip cap 3, and end face hard alloy blocks 11 evenly distributes along circumference, and hole 18 is blind holes of inserting straight pin when tightening gear wheel 5.
Claims (10)
1, hard-alloy roller-type bit with sliding bearings, it is characterized in that being on each fricting working surface of tooth pawl axle carbide alloy, fix a limit thrust ring at tooth pawl shaft end with screw thread, it on the one end carbide alloy, can adjust the axial location of limit thrust ring by pad, one gear wheel slip cap free to rotate is arranged on tooth pawl axle, be carbide alloy on its each fricting working surface, gear wheel uses screw-thread securing on the gear wheel slip cap, and together rotate with it, through hole on tooth pawl and the tooth pawl axle is the drilling mud passage, so that carbide alloy is carried out cooling and lubricating.
2, hard-alloy roller-type bit with sliding bearings according to claim 1 is characterized in that the periphery of described tooth pawl axle and shoulder sintering or welding-on have the W-Co kind hard alloy blocks, or applies the hard alloy layer of one or more layers different hardness of weldering with laser.
3, hard-alloy roller-type bit with sliding bearings according to claim 1 and 2 is characterized in that there is right-handed thread the end of described tooth pawl axle, in order to fastening limit thrust ring.
4, hard-alloy roller-type bit with sliding bearings according to claim 1 is characterized in that described limit thrust ring is to be fastened on tooth pawl shaft end with right-handed thread, and adjusts the axial location of limit thrust ring with pad.
5, according to claim 1 or 4 described hard-alloy roller-type bit with sliding bearings, it is characterized in that on the end face of described limit thrust ring that sintering or welding-on have the W-Co kind hard alloy blocks, or apply the hard alloy layer of one or more layers different hardness of weldering with laser.
6, hard-alloy roller-type bit with sliding bearings according to claim 1, it is characterized in that on each fricting working surface of described gear wheel slip cap that sintering or welding-on have the W-Co kind hard alloy blocks, or apply the hard alloy layer of one or more layers different hardness of weldering with laser.
7,, it is characterized in that on the periphery of described gear wheel slip cap right-handed thread being arranged, in order to fastening gear wheel according to claim 1 or 6 described hard-alloy roller-type bit with sliding bearings.
8, hard-alloy roller-type bit with sliding bearings according to claim 1 is characterized in that described gear wheel is to be fastened on the gear wheel slip cap with right-handed thread, and together rotates with it, when tightening with straight pin with the gear wheel slip cap interim and tooth pawl fix.
9, hard-alloy roller-type bit with sliding bearings according to claim 1 is characterized in that having tightened up a tooth pawl axle axle sleeve by right-handed thread on the described tooth pawl axle.
10, according to claim 1 or 9 described hard-alloy roller-type bit with sliding bearings, it is characterized in that on the cylindrical of described tooth pawl axle axle sleeve and the end face that sintering or welding-on have the W-Co kind hard alloy blocks, or apply the hard alloy layer of one or more layers different hardness of weldering with laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101825 CN1065507A (en) | 1991-04-02 | 1991-04-02 | Hard-alloy roller-type bit with sliding bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101825 CN1065507A (en) | 1991-04-02 | 1991-04-02 | Hard-alloy roller-type bit with sliding bearings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1065507A true CN1065507A (en) | 1992-10-21 |
Family
ID=4905284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91101825 Pending CN1065507A (en) | 1991-04-02 | 1991-04-02 | Hard-alloy roller-type bit with sliding bearings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1065507A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061887A (en) * | 2011-01-13 | 2011-05-18 | 东北石油大学 | Tooth placement drill bit formed by mixing hard alloy teeth with polycrystalline diamond clad sheets |
| CN101787857B (en) * | 2009-01-23 | 2012-07-25 | 中成新星油田工程技术服务股份有限公司 | Cone reamer |
-
1991
- 1991-04-02 CN CN 91101825 patent/CN1065507A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787857B (en) * | 2009-01-23 | 2012-07-25 | 中成新星油田工程技术服务股份有限公司 | Cone reamer |
| CN102061887A (en) * | 2011-01-13 | 2011-05-18 | 东北石油大学 | Tooth placement drill bit formed by mixing hard alloy teeth with polycrystalline diamond clad sheets |
| CN102061887B (en) * | 2011-01-13 | 2013-05-01 | 东北石油大学 | Tooth placement drill bit formed by mixing hard alloy teeth with polycrystalline diamond clad sheets |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |