CN203729933U - Wear-resistant expansion cone - Google Patents
Wear-resistant expansion cone Download PDFInfo
- Publication number
- CN203729933U CN203729933U CN201320878734.0U CN201320878734U CN203729933U CN 203729933 U CN203729933 U CN 203729933U CN 201320878734 U CN201320878734 U CN 201320878734U CN 203729933 U CN203729933 U CN 203729933U
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- China
- Prior art keywords
- expansion cone
- hard coat
- wear
- coating groove
- prefabricated
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Abstract
The utility model provides a wear-resistant expansion cone. A coating groove (4) is prefabricated on a work surface of the expansion cone (1); the prefabricated coating groove (4) is arranged in way of spanning a cross part between a gauge protection section (3) of the expansion cone and a reducing section (2) of the expansion cone; the width of the prefabricated coating grooves (4) covers the reducing section (2) is no less than 2/3 of the width of reducing section; the periphery of the expansion cone is winded by the prefabricated coating groove (4); a hard coating layer (5) is disposed in the prefabricated coating groove; the whole bottom surface of the prefabricated coating groove (4) is covered with the hard coating layer (5); and the hardness of the hard coating layer (5) is larger than 60HRC. High combination strength is achieved between the coating and an expansion cone base body; surface hardness of the expansion cone is improved by the hard coating layer; wear-resistance of the expansion cone is improved, so service life of the expansion cone is prolonged, expansion pressure is reduced; and wide application value is provided in expansion tube technology.
Description
Technical field
The utility model belongs to oil-gas field development technical field, relates to specifically a kind of wear-resistant expansion cone.
Background technology
Bulged tube technology is the great new technology occurring in petroleum works field, is also a hot research field in recent years.Bulged tube technology is under the effect of hydraulic pressure or mechanical force, drives expansion cone to produce and move axially in expansion tube, reaches thereby make expansion tube exceed elastic limit generation permanent plastic deformation the object that increases flow string or well internal diameter.Bulged tube technology can solve that conventional well deep structure well is darker, the sleeve pipe number of plies is more effectively, and the problem that final borehole diameter will be very little, can be used for the operation process such as drilling well, completion, oil recovery, well workover.
Domestic and international expansion cone used is high strength steel at present, and expansion tube is through the special sleeve pipe processing by mild steel.The expansion process of sleeve pipe is the friction process of the friction pair of expansion cone surface and expansion sleeve inner surface formation namely.Because the external diameter of expansion cone is greater than the internal diameter of expansion tube, the needed power of plastic strain causes contact between expansion cone and inflatable sleeves pipe internal surface far away higher than the pressure between contact surface in standard machinery transmission, in mechanical bearing, contact surface is pressed only has 20-50MPa conventionally, result of study shows, in order to make sleeve pipe by dilatating and deformable, interface pressure between bloat tool and internal surface of sleeve pipe can be up to 500-800MPa, in operation process, contact interface is followed high temperature rise, because expansion cone and expansion tube material all belong to steel, so there is adherent phenomenon, cause certain adhesive wear.And the sand grains existing in operating environment, causes serious abrasive wear and destruction to expansion cone surface, therefore in expansion process, be there is to serious fretting wear problem in expansion cone.Wearing and tearing in expansion tube operation process mainly comprise adhesive wear, contact fatigue wearing and tearing and abrasive wear, by improving intensity and the hardness of expansion cone surfacing, change the material behavior of expansion cone and expansion tube contact interface, can make the wearing and tearing of expansion cone reduce.
Both at home and abroad mainly to be coated with sliding agent, the microencapsulation coating that comprises sliding agent on expansion tube surface, to add a mechanism in order to provide the methods such as sliding agent to reduce fretting wear in expansion cone, but hydrodynamic lubrication material can not play a role during up to 500-800MPa at interface pressure, in the expansion process of long well section, there is the serious attrition problem such as ineffective that comes off in solid lubricant coating, cause expansion cone serious wear, improved operating risk.The expansion cone made from Hardmetal materials completely, can significantly improve the hardness of expansion cone, but because Hardmetal materials fragility is large, have the danger of easy embrittlement in expansion operation process.The purpose of this utility model is just for above-mentioned existing methodical deficiency, provide a kind of new raising expansion cone wear-resistant, extend the expansion cone method in application life.High strength steel is combined on project organization with carbide alloy, process a prefabricated coating groove that 50-500 μ m is dark at expansion cone face machinery, 50-500 μ m hard coat is set in groove, coating and expansion cone matrix surface are without step strong bonded, former steel is contacted with steel and become steel and contact with carbide alloy, alleviate adhesive wear, expansion cone work plane reaches high rigidity, Abrasive Resistance of Stubble-cleaning improves, and does not have the risk of cone embrittlement.
Utility model content
The purpose of this utility model is to provide a kind of wear-resistant expansion cone, expansion cone of the present utility model can improve the abrasion resistance properties of expansion cone in expansion process, reduce the adhesion between the surface of expansion cone in expansion process and expansion tube surface steel, the application life of prolongation expansion cone.
For reaching above-mentioned purpose, the utility model provides a kind of wear-resistant expansion cone, described expansion cone 1 arranges prefabricated coating groove 4 at work plane, the interface that this prefabricated coating groove is crossed over expansion cone gauge section 3 and reducer 2 is divided setting, wherein this prefabricated coating groove 4 is not less than 2/3rds of reducer width at the width of reducer 2, and prefabricated coating groove 4 arranges a circle around expansion cone 1; Prefabricated coating groove 4 is interior arranges hard coat 5, and hard coat 5 covers the whole lower surface of prefabricated coating groove 4;
According to wear-resistant expansion cone described in the utility model, the preferred described hard coat 5 of the utility model is greater than the hard coat of 60HRC for hardness;
According to wear-resistant expansion cone described in the utility model, the preferred described hard coat 5 of the utility model is the hard coat of hardness 60～70HRC;
According to wear-resistant expansion cone described in the utility model, described hard coat 5 can adopt the hard coating material of the utility model routine, such as tungsten carbide coating, chromium oxide coating etc.; The hard coat that the preferred described hard coat 5 of the utility model is tungsten carbide.
Wherein one skilled in the art will appreciate that the width of reducer in the utility model, refer to the width of reducer along the direction of expansion cone central axis.
According to wear-resistant expansion cone described in the utility model, the expansion cone girth that prefabricated coating groove 4 is set accounts for whole expansion cone overall circumferences; That is to say that described prefabricated coating groove 4 arranges a circle around expansion cone 1.
According to wear-resistant expansion cone described in the utility model, described prefabricated coating groove 4 degree of depth 50-500 μ m.
According to wear-resistant expansion cone described in the utility model, described hard coat thickness is consistent with described prefabricated coating groove depth.
According to wear-resistant expansion cone described in the utility model, described hard coat 5 is to process after prefabricated coating groove 4 at expansion cone work plane, is arranged on the hard coat in prefabricated coating groove 4 by hot spraying, laser melting coating or overlaying method.
According to wear-resistant expansion cone described in the utility model, described hard coat 5 is that described hard coat 5 is arranged on to the hard coat that prefabricated coating groove 4 carries out mirror finish processing after interior, makes groove undercoating and expansion cone surface without step smooth transition.
According to wear-resistant expansion cone described in the utility model, process after prefabricated coating groove 4 at expansion cone work plane, first more described hard coat 5 is arranged in prefabricated coating groove 4 through pretreatment.
According to wear-resistant expansion cone described in the utility model, process after prefabricated coating groove 4, described pretreatment, for adopting organic solvent to clean expansion cone 1, to remove surface and oil contaminant, to adopting sandblast roughening treatment in prefabricated coating groove, improves the adhesion of coating.
Wherein preferred described organic solvent is gasoline, acetone or carbon tetrachloride;
Wherein also preferred described sandblast roughening treatment is diamond dust sandblast roughening treatment; To remove surface film oxide, and produce even and rough rough surface.
Utility model also provides the processing method of described wear-resistant expansion cone, described method is included in expansion cone work plane and processes after prefabricated coating groove 4, by hot spraying, laser melting coating or overlaying method, described hard coat 5 is arranged on to the step in prefabricated coating groove.
According to method described in the utility model, after being arranged in prefabricated coating groove, described hard coat 5 also comprises the step that hard coat 5 is carried out to grinding and buffing processing.
According to method described in the utility model, process after prefabricated coating groove 4 at expansion cone work plane, first more described hard coat 5 is arranged in prefabricated coating groove through pretreatment;
According to method described in the utility model, the preferred described pretreatment of the utility model, for adopting organic solvent to clean expansion cone 1, then adopts sandblast roughening treatment to prefabricated coating groove 4;
Wherein preferred described organic solvent is gasoline, acetone or carbon tetrachloride;
Wherein also preferred described sandblast roughening treatment is diamond dust sandblast roughening treatment, removes surface film oxide, produces even and rough rough surface.
In sum, the utility model provides a kind of wear-resistant expansion cone.Wear-resistant expansion cone tool of the present utility model has the following advantages:
1, the utility model provides a kind of method that improves expansion cone abrasion resistance properties based on hard coat, can reduce the wearing and tearing in expansion cone operation process, can be for bulged tube technology.
2, the utility model provides a kind of prefabricated coating groove structure design, and this prefabricated coating groove has improved the bond strength of coating with cone matrix, realizes coating and matrix surface without step smooth transition.
3, the coating that the utility model adopts is hard coat, hard coat has the hardness higher than steel as matrix material, expansion cone case hardness improves more than 20%, its Abrasive Resistance of Stubble-cleaning is significantly improved, simultaneously hard coat has been avoided contacting of steel and steel in common expansion technique, reduce the adhesive wear of work plane under top load effect, reduced expansion operational pressure and operating risk.
4, the utility model provides a kind of expansion cone face coat technique method that technique is relatively simple, be applicable to industrialization production, it is high that coating has hardness, the feature that adhesion is strong is with a wide range of applications in bulged tube technology, has reduced cost of production simultaneously.
Brief description of the drawings
Fig. 1 is the wear-resistant expansion cone structural representation of embodiment 1;
Fig. 2 is the rip cutting sectional view at the A-A position of Fig. 1;
Fig. 3 is the local enlarged diagram of prefabricated coating groove at the B place of Fig. 1;
Fig. 4 be the B place of Fig. 1 coating the local enlarged diagram of prefabricated coating groove of hard coat;
Wherein, 1 is expansion cone, and 2 is reducer, and 3 is gauge section, and 4 is prefabricated coating groove, and 5 is hard coat.
Detailed description of the invention
Describe below the beneficial effect of implementation process of the present utility model and generation by specific embodiment in detail, be intended to help reader to understand better essence of the present utility model and feature, not as restriction that can practical range to this case.
Embodiment 1
The utility model provides a kind of high abrasion expansion cone 1 with hard coat, as Figure 1-4, for achieving the above object, the utility model is taked following technical scheme: process and be greater than the prefabricated coating groove 4 that 50 μ m are dark at expansion cone face machinery, the interface that this prefabricated coating groove 4 is crossed over expansion cone gauge section 3 and reducer 2 is divided setting, in prefabricated coating groove, coated with hard coating 5(is as tungsten carbide wc), the thickness of coating is greater than 50 μ m, such coating hardness 60～70HRC.
Taking tungsten carbide coating as example, comprise following step:
Prefabricated coating groove 4 is processed: process the prefabricated coating groove 4 of 200 μ m at expansion cone face machinery, as shown in Figure 3.
Pretreatment: adopt acetone to clean expansion cone 1, remove surface and oil contaminant and pollutant and dry up surface, sandblast roughening treatment is carried out in prefabricated coating groove 4 surfaces, be beneficial to the mechanical bond of coating.
Apply WC coating: adopt method sprayed wc coating 5 in prefabricated coating groove of hot spraying, fill up prefabricated coating groove 4 until be coated with floor height, as shown in Figure 4.
Coating surface polishing: coating 5 is carried out to surface finish and polishing, until coating 5 is consistent with cone apparent height, realize coating and expansion cone surface without step smooth transition, the tapering correction to coating area simultaneously and the corresponding cone angle of reducer 2.
The utility model, processes a prefabricated coating groove 4 that 50-500 μ m is dark in expansion cone surface design, in this prefabricated coating groove, forms surface hard layer, and its thin hardened layer is thicker, avoids because of the thin phenomenon being worn under arms of thin hardened layer.By the strengthening of surface hard layer, make material surface obtain the property that integral material cannot obtain, and needn't change overall material.
Hardened layer can pass through laser melting coating, and the methods such as hot spraying, built-up welding form.
In a specific embodiment of the present utility model, the width that described prefabricated coating groove 4 accounts for reducer 2 is 2/3 of reducer width.
Claims (8)
1. a wear-resistant expansion cone, it is characterized in that, described expansion cone (1) arranges prefabricated coating groove (4) at work plane, this prefabricated coating groove (4) is crossed over the interface of expansion cone gauge section (3) and reducer (2) and is divided setting, the width that wherein this prefabricated coating groove (4) accounts for reducer (2) is not less than 2/3rds of reducer width, and prefabricated coating groove (4) arranges one week around expansion cone; Hard coat (5) is set in prefabricated coating groove, and hard coat (5) covers all lower surface of prefabricated coating groove (4).
2. wear-resistant expansion cone according to claim 1, is characterized in that, described hard coat (5) is greater than the hard coat of 60HRC for hardness.
3. wear-resistant expansion cone according to claim 2, is characterized in that, the hard coat that described hard coat (5) is 60～70HRC for hardness.
4. wear-resistant expansion cone according to claim 3, is characterized in that, the hard coat that described hard coat (5) is tungsten carbide.
5. according to the wear-resistant expansion cone described in claim 1～4 any one, it is characterized in that described prefabricated coating groove (4) degree of depth 50-500 μ m.
6. according to the wear-resistant expansion cone described in claim 1～4 any one, it is characterized in that, described hard coat (5) thickness is consistent with described prefabricated coating groove (4) degree of depth.
7. according to the wear-resistant expansion cone described in claim 1～4 any one, it is characterized in that, described hard coat (5) is to process after prefabricated coating groove (4) at expansion cone (1) work plane, is arranged on the hard coat in prefabricated coating groove (4) by hot spraying, laser melting coating or overlaying method.
8. according to the wear-resistant expansion cone described in claim 1～4 any one, it is characterized in that, described hard coat (5) is the hard coat that also carries out mirror finish processing after described hard coat (5) is arranged in prefabricated coating groove (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320878734.0U CN203729933U (en) | 2013-12-27 | 2013-12-27 | Wear-resistant expansion cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320878734.0U CN203729933U (en) | 2013-12-27 | 2013-12-27 | Wear-resistant expansion cone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203729933U true CN203729933U (en) | 2014-07-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320878734.0U Expired - Fee Related CN203729933U (en) | 2013-12-27 | 2013-12-27 | Wear-resistant expansion cone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203729933U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742094A (en) * | 2013-12-27 | 2014-04-23 | 中国石油天然气股份有限公司 | Wear-resistant expansion cone and machining method thereof |
-
2013
- 2013-12-27 CN CN201320878734.0U patent/CN203729933U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742094A (en) * | 2013-12-27 | 2014-04-23 | 中国石油天然气股份有限公司 | Wear-resistant expansion cone and machining method thereof |
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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: 20140723 Termination date: 20201227 |