CN205297315U - Screw rod is journal bearing for drilling tool - Google Patents
Screw rod is journal bearing for drilling tool Download PDFInfo
- Publication number
- CN205297315U CN205297315U CN201521121582.5U CN201521121582U CN205297315U CN 205297315 U CN205297315 U CN 205297315U CN 201521121582 U CN201521121582 U CN 201521121582U CN 205297315 U CN205297315 U CN 205297315U
- Authority
- CN
- China
- Prior art keywords
- radial
- wearing layer
- overcoat
- hard alloy
- drilling tool
- 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 - Fee Related
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- Earth Drilling (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The utility model discloses a screw rod is journal bearing for drilling tool, including the radial overcoat and radial endotheca of mutually supporting, being provided with first wearing layer on the internal surface of radial overcoat, being provided with the second wearing layer on the surface of radial endotheca, the external diameter of first wearing layer is greater than the external diameter of second wearing layer. The second wearing layer is including the hard alloy block who evenly inlays the circular structure of a plurality of on radial endotheca surface, a plurality of hard alloy block is the spiral diposition on radial endotheca surface, radial overcoat with radial in put in and all be provided with the wearing layer, the contact surface that makes radial overcoat and radial endotheca had corrosion -resistant, shock resistance, bear the big performance of load, lengthened journal bearing's life, even use, also can guarantee it self performance under abominable condition, improved the work efficiency of oil drilling machinery.
Description
Technical field
This utility model relates to a kind of journal bearing, specifically, relates to a kind of radial bearing for screw drilling tool, belongs to oil exploration equipment field.
Background technology
At present, helicoid hydraulic motor is one of most widely used mud motor in current oil, gas drilling, not only indispensable in directional well, Horizontal Well Drilling well operations, and along with the popularization of composite drill, helicoid hydraulic motor is increasingly becoming one of indispensable downhole tool of full well section speed-raising. The use of helicoid hydraulic motor be unable to do without journal bearing, the bearing steel of journal bearing generally through a series of Technology for Heating Processing to improve its wearability. But owing to the drilling process of oil exploitation carries out in mud, the work under bad environment of journal bearing, cause that journal bearing is easy to wear, the life-span is low, often occur seizing and cut axle phenomenon.
Utility model content
Problem to be solved in the utility model is for problem above, it is provided that a kind of high-efficiency abrasion-proof, long service life radial bearing for screw drilling tool.
In order to solve the problems referred to above, this utility model by the following technical solutions:
A kind of radial bearing for screw drilling tool, including the radial direction overcoat cooperated and radial direction inner sleeve; Radially being provided with the first wearing layer on the inner surface of overcoat, be radially provided with the second wearing layer on the outer surface of inner sleeve, the external diameter of the first wearing layer is more than the external diameter of the second wearing layer. Described second wearing layer includes the hard alloy blocks of several circular configurations being uniformly embedded on radial direction lining the outer surface of, and several hard alloy blocks described arrange twist on radial direction lining the outer surface of.
Between adjacent hard alloy blocks, there is gap, in this gap, sinter useful tungsten carbide powder.
Described hard alloy blocks is cylindrical structural, its periphery and upper surface rounding off, and intermediate position is provided with annular groove, and time integral sintered, tungsten carbide powder is filled in annular groove simultaneously.
Wherein one end of described radial direction overcoat is provided with on the excircle of radially outer collar described in keyway and is provided with annular protrusion.
This utility model adopts such scheme, put in radial direction overcoat and radial direction and be provided with wearing layer, the contact surface making radially overcoat and radially inner sleeve has had corrosion-resistant, shock resistance, has born the performance that load is big, extend the service life of journal bearing, even if using under severe conditions, also can guarantee that the performance of its own, improve the work efficiency of oil drilling and r eoovery machine.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of this utility model embodiment;
Accompanying drawing 2 is this utility model embodiment central diameter to the structural representation of overcoat;
Accompanying drawing 3 is the structural representation of hard alloy blocks in this utility model embodiment.
In figure: 1-is overcoat radially; 2-is inner sleeve radially; 3-the first wearing layer; 4-the second wearing layer; 5-hard alloy blocks; 6-tungsten carbide powder; 7-annular protrusion; 8-keyway.
Detailed description of the invention
Embodiment, as shown in Figure 1 and Figure 2, a kind of radial bearing for screw drilling tool, including the radial direction overcoat 1 cooperated and radial direction inner sleeve 2; Radially being provided with the first wearing layer 3 on the inner surface of overcoat 1, be radially provided with the second wearing layer 4 on the outer surface of inner sleeve 2, the external diameter of the first wearing layer 3 is more than the external diameter of the second wearing layer 4.
Described second wearing layer 4 includes the hard alloy blocks 5 of several circular configurations being uniformly embedded on radial direction inner sleeve 2 outer surface, and several hard alloy blocks 5 described arrange twist on radial direction inner sleeve 2 outer surface.
Between adjacent hard alloy blocks 5, there is gap, in this gap, sinter useful tungsten carbide powder 6.
Wherein one end of described radial direction overcoat 1 is provided with keyway 8, and the excircle of described radial direction outer collar is provided with annular protrusion 7.
As it is shown on figure 3, described hard alloy blocks 5 is cylindrical structural, its periphery and upper surface rounding off, intermediate position is provided with annular groove 9, and time integral sintered, tungsten carbide powder 6 is filled in annular groove 9 simultaneously.
This utility model adopts such scheme, radially overcoat 1 and radial direction inner sleeve 2 are provided with wearing layer, the contact surface making radially overcoat 1 and radially inner sleeve 2 has had corrosion-resistant, shock resistance, has born the performance that load is big, extend the service life of journal bearing, even if using under severe conditions, also can guarantee that the performance of its own, improve the work efficiency of oil drilling and r eoovery machine.
The foregoing is only preferred embodiment of the present utility model, it is not limited to this utility model, although this utility model being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature carries out equivalent replacement. All within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (4)
1. a radial bearing for screw drilling tool, including the radial direction overcoat cooperated and radial direction inner sleeve; It is characterized in that: radially the inner surface of overcoat is provided with the first wearing layer, radially the outer surface of inner sleeve is provided with the second wearing layer, described second wearing layer includes the hard alloy blocks of several circular configurations being uniformly embedded on radial direction lining the outer surface of, and several circular configuration hard alloy blocks described arrange twist on radial direction lining the outer surface of.
2. a kind of radial bearing for screw drilling tool according to claim 1, it is characterised in that: the external diameter of the first wearing layer is more than the external diameter of the second wearing layer.
3. a kind of radial bearing for screw drilling tool according to claim 2, it is characterised in that: between adjacent hard alloy blocks, there is gap, in this gap, sinter useful tungsten carbide powder.
4. a kind of radial bearing for screw drilling tool according to claim 3, it is characterized in that: described hard alloy blocks is cylindrical structural, its periphery and upper surface rounding off, intermediate position is provided with annular groove, time integral sintered, tungsten carbide powder is filled in annular groove simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521121582.5U CN205297315U (en) | 2015-12-31 | 2015-12-31 | Screw rod is journal bearing for drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521121582.5U CN205297315U (en) | 2015-12-31 | 2015-12-31 | Screw rod is journal bearing for drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205297315U true CN205297315U (en) | 2016-06-08 |
Family
ID=56468645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521121582.5U Expired - Fee Related CN205297315U (en) | 2015-12-31 | 2015-12-31 | Screw rod is journal bearing for drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205297315U (en) |
-
2015
- 2015-12-31 CN CN201521121582.5U patent/CN205297315U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20160608 Termination date: 20201231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |