CN103742093A - Bionic abrasion-resistant expansion cone and manufacturing method thereof - Google Patents
Bionic abrasion-resistant expansion cone and manufacturing method thereof Download PDFInfo
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- CN103742093A CN103742093A CN201310741121.7A CN201310741121A CN103742093A CN 103742093 A CN103742093 A CN 103742093A CN 201310741121 A CN201310741121 A CN 201310741121A CN 103742093 A CN103742093 A CN 103742093A
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Abstract
The invention provides a bionic abrasion-resistant expansion cone and a manufacturing method thereof. A coating is combined with the bionic non-smooth shape; a precast coating groove is machined in the working surface of the expansion cone; the coating is arranged in the precast coating groove, wherein the thickness of the coating is consistent with the groove depth; the smooth transition which is free of step is formed between the coating and the surface of the expansion cone; the surface of the coating is provided with a concave body unit; accordingly the non-smooth shape is formed on the surface of the expansion cone. A surface hardening layer is combined with the bionic non-smooth shape and accordingly the integral change of materials of the expansion cone does not need to be performed and accordingly the high surface hardness can be obtained. According to the bionic abrasion-resistant expansion cone, the abrasion can be reduced, the abrasion resistance of the expansion cone can be improved, the service life of the expansion cone can be extended, the friction force and the expansion pressure can be reduced, and the operating risk can be reduced.
Description
Technical field
The present invention relates to oil-gas field development technical field, be specifically related to a kind of Bionic wear-resisting and damage expansion cone and manufacture method thereof.
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, thereby make expansion tube surpass elastic limit generation permanent plastic deformation, reaches 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 Yi Ge 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.Object of the present invention 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.
The evolution that it's 1 years is past natural animal via, the ability that optimization conforms all over the body, as pangolin, mole cricket and dung beetle etc. all have non-smooth body surface form, its role is to drag reduction, desorption and wear-resisting.Utilize bionics method, the non-smooth theory of biological surface is applied in bulged tube technology, will provide new thinking of development for improving bulged tube technology level.Texture processing is carried out in expansion cone surface, reach reduce frictional resistance, increase the service life, reduce operational pressure, the object of raising job success ratio.
Summary of the invention
One object of the present invention is to provide a kind of Bionic wear-resisting to damage expansion cone, and the present invention combines coating with bionic, non-smooth form, for expansion cone technology, improves the abrasion resistance of expansion cone, extends the expansion cone life-span.
Another object of the present invention is to provide the manufacture method of described wear-resistant expansion cone.
For reaching above-mentioned purpose, on the one hand, the invention provides a kind of wear-resistant expansion cone, described expansion cone arranges prefabricated coating groove 2 at its work plane, in the interior coating that arranges of prefabricated coating groove 2, at coating surface, concave volume unit 3 is set.
According to expansion cone of the present invention, the interface that prefabricated coating groove 2 of the present invention is crossed over expansion cone sizing section 4 and reducer 5 is divided setting, the width that wherein this prefabricated coating groove 2 accounts for reducer 5 is not less than 2/3rds of reducer width, and prefabricated coating grooved ring arranges one week around expansion cone.
According to expansion cone of the present invention, described concave volume unit 3 forms concave volume unit band 6, the boundary that described concave volume unit band 6 is crossed over expansion cone sizing section 4 and reducer 5 arranges, the width that wherein this concave volume unit band 6 accounts for reducer 5 is not less than 1/4th of reducer width, and concave volume unit band 6 arranges one week around expansion cone.
One skilled in the art will appreciate that reducer width described here refers to reducer along the width of expansion cone axis direction.
According to expansion cone of the present invention, prefabricated coating groove 2 degree of depth 50～500 μ m of the present invention.
According to expansion cone of the present invention, further preferred described prefabricated coating groove 2 degree of depth of the present invention are 200 μ m.
According to expansion cone of the present invention, further preferred described coating layer thickness is consistent with prefabricated coating groove depth in the present invention;
According to expansion cone of the present invention, described coating hardness is greater than 60HRC;
According to expansion cone of the present invention, the preferred described coating hardness of the present invention is 60～70HRC.
According to expansion cone of the present invention, the bottom of concave volume of the present invention unit and coating trench bottom distance are 10～460 μ m.
According to expansion cone of the present invention, the present invention further bottom and the coating trench bottom distance of preferred described concave volume unit 3 is 150 μ m.
According to expansion cone of the present invention, most preferably, described prefabricated coating groove 2 degree of depth are 200 μ m in the present invention, and concave volume unit 3 degree of depth are 50 μ m.
According to expansion cone of the present invention, concave volume of the present invention unit 3 is parallel or latticed striped, spherical crown shape pit;
Wherein the preferred described concave volume of the present invention unit 3 is spherical crown shape pit;
According to expansion cone of the present invention, preferred described concave volume cell surface characteristic size 50～500 μ m of the present invention, for spherical crown shape pit, characteristic size is pit diameter, for parallel or latticed striped, characteristic size is width of fringe.
Those skilled in the art should be understood that, because described concave volume unit can be variform, latticed striped described above, spherical crown shape pit, therefore concave volume cell surface width described here is the above width of ordinary meaning, it is the vertical distance at the shortest relative two edges of concave volume cell distance, for example, when concave volume unit is spherical crown shape, described width should be its diameter; When concave volume unit is latticed striped, the width that described width is striped, but not length.
Wherein the present invention is further preferably when described concave volume unit is parallel or latticed striped, and described concave volume cell width is 50～500 μ m, and fringe spacing is 10～1000 μ m; Wherein being preferably described concave volume cell width is 150 μ m, and fringe spacing is 200 μ m;
When described concave volume unit is spherical crown shape pit, described concave volume element diameter is 50～500 μ m, and the center of circle, adjacent concave volume unit phase mutual edge distance is 150～1400 μ m; Wherein being preferably described concave volume element diameter is 150 μ m, and the center of circle, adjacent concave volume unit phase mutual edge distance is 300 μ m.
The coating arranging in the prefabricated coating groove of the present invention and expansion cone surface are without step smooth transition, at coating surface, concave volume unit is set, thereby form non-smooth morphology on expansion cone surface, this non-smooth morphology can become rolling friction from sliding friction by the abrasive particle in expansion cone operation process, reduce the wearing and tearing on expansion cone surface, reduce contact area, reduce the grains of sand and stick, play the effect that stores abrasive particle and sliding agent, and be conducive to form lubricating film.
Wherein more preferably described coating is tungsten carbide.
On the other hand, the present invention also provides the manufacture method of described wear-resistant expansion cone, and described method comprises:
(1) at expansion cone matrix 1 work plane of expansion cone, process prefabricated coating groove 2;
(2) in the interior coating that arranges of prefabricated coating groove 2
(3) at coating surface, concave volume unit 3 is set;
Preferably use laser instrument processing concave volume unit 3.
According to method of the present invention, after processing concave volume unit, also comprise coating surface is carried out to bright finished step.
According to method of the present invention, after step (1) is processed prefabricated coating groove, also comprise and adopt organic solvent to clean the pre-treatment step of sandblast alligatoring in expansion cone and prefabricated coating groove.
Wherein the preferred organic solvent of the present invention is acetone.
In sum, the invention provides a kind of Bionic wear-resisting and damage expansion cone and manufacture method thereof.Wear-resistant expansion cone tool of the present invention has the following advantages:
1, the invention provides the expansion cone manufacture method that a kind of Bionic wear-resisting damages, hard coat is combined and is applied to expansion cone surface with bionic, non-smooth form, improve expansion cone abrasion resistance properties, reduce the wearing and tearing in expansion cone operation process, reduce frictional resistance, extend the expansion cone life-span, can be for bulged tube technology.
2, expansion cone of the present invention has bionic non-smooth surface, and this non-smooth morphology can store abrasive particle, makes sliding friction originally change rolling friction into, reduces frictional resistance.
3, the present invention, by the combination of bionic, non-smooth form and cementation zone, makes material surface obtain the special hardness that integral material cannot obtain, and needn't wholely change material.
4, the present invention is applied to expansion cone surface by bionic, non-smooth, can reduce the contact area in expansion cone operation process, reduces the grains of sand and sticks, and plays the effect that stores abrasive particle and sliding agent, and is conducive to form lubricating film.
5, the invention provides the prefabricated coating groove of a kind of ring-type structure design, this prefabricated coating groove has improved the bond strength of coating with cone matrix, realizes coating and matrix without step smooth transition.
6, the coating that the present invention adopts is hard coat, hard coat has the hardness higher than steel as matrix material, for expansion cone surface provides higher hardness, its Abrasive Resistance of Stubble-cleaning is significantly improved, simultaneously hard coat has been avoided contacting of steel and steel in common expansion technique, has reduced the wearing and tearing of work plane under top load effect.
Accompanying drawing explanation
Fig. 1 is that the embodiment of the present invention 1 Bionic wear-resisting damages expansion cone.
Wherein, 1 is expansion cone matrix, and 2 is prefabricated coating groove, and 3 is concave volume unit, 4 sizing sections that are expansion cone, and 5 reducers that are expansion cone, 6 is concave volume unit band.
The specific embodiment
By specific embodiment, describe below the beneficial effect of implementation process of the present invention and generation in detail, be intended to help reader to understand better essence of the present invention and feature, not as restriction that can practical range to this case.
Embodiment 1
The invention provides the expansion cone that a kind of Bionic wear-resisting damages, as shown in Figure 1, coating is combined and is applied to expansion cone surface with bionic, non-smooth form, improve expansion cone abrasion resistance properties, for achieving the above object, the present invention takes following technical scheme: at expansion cone 1 face machinery, process the prefabricated coating groove 2 that 200 μ m are dark, sprayed wc coating in prefabricated coating groove, coating and expansion cone surface are without smooth transition, and this coating hardness is 65HRC.At coating surface, process concave volume unit 3, these concave volume unit 3 degree of depth are 50 μ m, and concave volume unit forms concave volume unit band.
Take tungsten carbide coating as example, comprise following step:
(1) prefabricated coating groove processing: processing at expansion cone face machinery the prefabricated coating groove 2 that 200 μ m are dark, is 25mm at the prefabricated coating slot part of sizing section 4 width, is 15mm at the prefabricated coating slot part of reducer 5 width, and wherein reducer width is 30mm.
(2) pretreatment: adopt acetone and other organic solvent to clean expansion cone surface, prefabricated coating groove is carried out to sandblast roughening treatment step, improve the bond strength of coating and expansion cone matrix.
(3) tungsten carbide coating is set: the method sprayed wc coating in prefabricated coating groove that adopts spraying.
(4) concave volume unit processing: design concave volume unit, described concave volume unit is spherical crown shape pit, diameter is 150 μ m, the degree of depth is 50 μ m, pit centres spacing is 300 μ m, adopts laser beam to process circular pit unit at coating surface, and concave volume unit forms concave volume unit band, in the concave volume unit of gauge section 4, bandwidth is 5mm, and in the concave volume unit of reducer 5, bandwidth is 12mm.
(5) coating surface polishing: coating surface is carried out to mirror finish processing, make coating and expansion cone surface without smooth transition.
The combination of bionic, non-smooth form and cementation zone, makes expansion cone wholely change material, makes surface obtain higher hardness.This non-smooth morphology can will can store in expansion cone operation process, reduces the wearing and tearing on expansion cone surface.
Claims (10)
1. Bionic wear-resisting damages an expansion cone, it is characterized in that, described expansion cone arranges prefabricated coating groove (2) at expansion cone matrix (1) work plane, in prefabricated coating groove (2), coating is set, and at coating surface, concave volume unit (3) is set; Preferred described prefabricated coating groove (2) degree of depth 50～500 μ m, more preferably 200 μ m.
2. expansion cone according to claim 1, it is characterized in that, the boundary that described prefabricated coating groove (2) is crossed over expansion cone sizing section (4) and reducer (5) arranges, the width that wherein this prefabricated coating groove (2) accounts for reducer (5) is not less than 2/3rds of reducer width, and prefabricated coating groove (2) arranges one week around expansion cone.
3. expansion cone according to claim 1, it is characterized in that, described concave volume unit (3) forms concave volume unit band (6), the boundary that described concave volume unit band (6) is crossed over expansion cone sizing section (4) and reducer (5) arranges, the width that wherein this concave volume unit band (6) accounts for reducer (5) is not less than 1/4th of reducer width, and concave volume unit band (6) arranges one week around expansion cone.
4. according to the expansion cone described in claim 1～3 any one, it is characterized in that, the coating layer thickness arranging in described prefabricated coating groove (2) is consistent with prefabricated coating groove depth, and preferred described coating hardness is greater than 60HRC, more preferably 60～70HRC; Preferred described coating is tungsten carbide again.
5. expansion cone according to claim 1, is characterized in that, the bottom of described concave volume unit (3) and coating groove (2) distance from bottom are 10～460 μ m; Be preferably 150 μ m.
6. expansion cone according to claim 1, is characterized in that, described concave volume unit is parallel or latticed striped, spherical crown shape pit, concave volume cell surface width 50～500 μ m.
7. the manufacture method of wear-resistant expansion cone described in claim 1～6 any one, is characterized in that, described method comprises:
(1) at expansion cone matrix (1) work plane of expansion cone, process prefabricated coating groove (2);
(2) in prefabricated coating groove (2), coating is set;
(3) in coating surface processing concave volume unit (3).
8. method according to claim 7, is characterized in that, step (3) is to use laser instrument processing concave volume unit (3).
9. method according to claim 8, is characterized in that, after processing concave volume unit, also comprises coating surface is carried out to bright finished step.
10. according to the method described in claim 7 or 8, it is characterized in that, after step (1) is processed prefabricated coating groove (2), also comprise and adopt organic solvent to clean the pre-treatment step of sandblast alligatoring in expansion cone and prefabricated coating groove; Preferably described organic solvent is acetone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310741121.7A CN103742093A (en) | 2013-12-27 | 2013-12-27 | Bionic abrasion-resistant expansion cone and manufacturing method thereof |
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| CN201310741121.7A CN103742093A (en) | 2013-12-27 | 2013-12-27 | Bionic abrasion-resistant expansion cone and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11898422B2 (en) | 2020-11-03 | 2024-02-13 | Saudi Arabian Oil Company | Diamond coating on the cone for expandable tubulars |
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| WO1998000626A1 (en) * | 1996-07-01 | 1998-01-08 | Shell Internationale Research Maatschappij B.V. | Method for expanding a steel tubing and well with such a tubing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11898422B2 (en) | 2020-11-03 | 2024-02-13 | Saudi Arabian Oil Company | Diamond coating on the cone for expandable tubulars |
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Application publication date: 20140423 |