CN201574692U - Oil-pumping polished rod - Google Patents
Oil-pumping polished rod Download PDFInfo
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- CN201574692U CN201574692U CN2009201506960U CN200920150696U CN201574692U CN 201574692 U CN201574692 U CN 201574692U CN 2009201506960 U CN2009201506960 U CN 2009201506960U CN 200920150696 U CN200920150696 U CN 200920150696U CN 201574692 U CN201574692 U CN 201574692U
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Abstract
The utility model relates to an oil-pumping polished rod, which comprises a base material and a nickel base alloy coating that is soldered on the surface of the base material, wherein the nickel base alloy coating is the copper-contained nickel base alloy coating. The oil-pumping polished rod has very good comprehensive mechanical properties, thereby improving the tensile strength obviously; in addition, the nickel base alloy coating on the surface of the oil-pumping polished rod has excellent wear resistance and corrosion resistance and better bending resistance, therefore, the oil-pumping polished rod can well meet the attended conditions with top load and abrasion and corrosion resistance of an oil field.
Description
Technical field
The utility model relates to oil equipment, more specifically relates to a kind of oil pumping polish rod.
Background technology
Rod-pumped well all is the main oil production method in domestic and international oil field all the time, and oil pumping polish rod is one of critical component of this class rod pumping system.Oil pumping polish rod is as first sucker rod of rod-pumped well, at first will bear the load such as various resistances that produce in the gravity of all sucker rods in down-hole, oil well pump and oil well well liquid and the oil pumping process; Because it will back and forth appear in a work period between down-hole well liquid and the atmosphere, also that will continue simultaneously rub, so make common polished rod be difficult to bear such corrosion and wearing and tearing with rubber oil sea well head; In addition, along with being on the increase of current dark oil well, heavy oil wells and high water-cut well, also need to continually develop the enough big enough good oil pumping polish rod of wear and corrosion behavior of supporting capacity.
Current, want to make the high strength oil pumping polish rod to have wear and corrosion behavior preferably simultaneously, just need carry out heat treatment or chemical treatments such as further surperficial plating, use comparatively extensive with the different ni base alloy coatings of surface spraying weld especially at present.And domestic oil field does not have the application of the material-type high-strength pumping-oil polish rod of high-bearing wear-and corrosion-resistant substantially, still generally use the surfacing polished rod of 20CrMo base material and surface spraying weld ni base alloy coating, make it be difficult to satisfy the demand of oil field reality gradually at aspects such as production and processing and performance requirements.Particularly because polished rod is bearing bigger bend cycles loading in ten centimeters scopes below its clamp, what make this position is broken into the polished rod main fracture form, and this fracture mode is more remarkable for surfacing coating polished rod, this mainly is because the oil field has the optimizing components of surfacing polished rod at ni base alloy coating now, and it is reasonable inadequately on the match selection of Ni-based coating and polished rod base material, cause that coating surface can comparatively fast crack and expand under this type of surfacing coating polished rod bending force effect in use, seriously reduced the application life of surfacing polished rod.
Therefore, how to optimize the composition of ni base alloy coating, select the better HL type polished rod base material of performance, and in coating surfacing process, realize the reasonable coupling of alloy coat and polished rod base material, significantly improving the bending resistance of surfacing coating polished rod and the cracking resistance line ability of face coat, will be to be related to the key point that can surfacing coating polished rod constantly satisfy the oil field instructions for use.
In sum, the oil field presses for a kind of function admirable and the relatively low material-type oil pumping polish rod of cost, hot surfacing coating technology in conjunction with after improving makes the type oil pumping polish rod have enough supporting capacitys and anti-bending strength, and wear-resisting preferably and corrosion resisting property.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, and provide a kind of and have bigger supporting capacity and bending resistance, and the oil pumping polish rod of wear and corrosion behavior preferably.
According to a kind of oil pumping polish rod that the utility model provides, comprise base material and surfacing ni base alloy coating in described substrate surface, described ni base alloy coating is the ni base alloy coating of cupric.
A kind of oil pumping polish rod that provides according to the utility model also has following attached technical characterictic:
Interpenetrate the formation permeable formation between described base material and the described ni base alloy coating.
The thickness of described permeable formation is 1 μ m～10 μ m.
The thickness of described ni base alloy coating is 0.10mm～0.50mm.
Surface roughness R
aSmaller or equal to 0.6 μ m.
The hardness of described ni base alloy coating is 25HRC～38HRC.
The kernel of section hardness of described base material is 35HRC～47HRC.
A kind of oil pumping polish rod that provides according to the utility model compared with prior art has following advantage:
1, the utility model has added copper in coating, copper has excellent anti-corrosion and anti-wear performance, therefore be widely used in anti-corrosion usually and the solid lubrication field, as in the alloy powder of using at some spray welding couplings by increasing a spot of copper (being generally 2～4%), just can make the surfacing coating of its acquisition have excellent more lubricated and corrosion resisting property, but in the utility model, the effect of copper is not only anti-corrosion and lubricated, but copper is added in the middle of the alloy powder with the purpose of improving the alloy coat mechanical property first, content by suitable raising copper and to the suitable control of its content range, and to the corresponding adjustment of other elemental composition scope of alloy powder, thereby make the spray coating of alloy powder coating in the utility model have better toughness, can improve the ability that coating opposing crackle forms and expands to a certain extent.Particularly, by the optimization coupling of this coating and base material, can provide solution route preferably for solving oil field polished rod problem in application life so that oil pumping polish rod of the present utility model has better whole anti-bending strength and resists the ability that face crack produces.
2, the utility model makes between ni base alloy coating and the base material and forms permeable formation, thereby makes that the combination of ni base alloy coating and base material is tightr, has improved the intensity of combination, has reduced the possibility that defectives such as coating surface crackle produce.
3. the strict roughness that has limited surfacing alloy polished rod in the utility model, make under this roughness condition, wearing and tearing between polished rod and the well head oil sealing further reduce, and are guaranteeing to reduce the replacing of oil sealing to a certain extent under the little prerequisite of oil-proof and change in friction force.
Description of drawings
Fig. 1 is a front view of the present utility model.
The specific embodiment
Referring to Fig. 1, the embodiment of a kind of oil pumping polish rod that provides at the utility model, comprise that base material 1 and surfacing constitute in ni base alloy coating 2 two parts on oil pumping polish rod base material 1 surface, oil pumping polish rod base material 1 is the flexible stock of an a kind of end jumping-up type, the jumping-up section 3 that comprises an end, the bar head 4,5 at two ends and the middle body of rod 6 two parts have the external screw thread that can be connected with rod collar on its bar head.
Wherein, described ni base alloy coating is the ni base alloy coating of cupric, the content range of copper is defined as 5.0%～15.0%, if this is because the content of copper is lower than 5% then be not enough to obviously improve the toughness of Co-based alloy powder surfacing coating and the ability that the opposing crackle forms, if and the content of copper surpasses 15% then can cause that Co-based alloy powder surfacing coating hardness significantly reduces, abrasion property can be descended, also be difficult to play the effect that opposing coating surface crackle forms.
Consisting of of described ni base alloy coating: C:0%～0.80% by percentage to the quality, Si:2.0%～4.0%, B:1.5%～4.5%, Cr:5.0%～14.0%, copper: 5.0%～15.0%, Fe≤5.0%, surplus is a nickel.Remove the molybdenum element that often adds in some Co-based alloy powders in the such scheme of the present utility model in the composition of ni base alloy coating, thereby reduced cost, and also simplified the technology of processing.
In the hot surfacing process of coating, interpenetrating the formation permeable formation between base material described in the utility model and the described ni base alloy coating.The thickness of described permeable formation is 1 μ m～10 μ m.Determining of this permeable formation thickness mainly based on following 2 points: the one, thickness is during less than 1 μ m, because the too thin technique controlling difficulty of permeable formation is bigger, for the flexible stock of this class of similar polished rod, can appear at the local possibility that does not form the defect point of infiltration that produces of the body of rod, make matrix and coating have a greatly reduced quality, can occur the possibility of coating scaling in the use in the bond strength at such some place; The 2nd, thickness because coating needs long high temperature guarantee the abundant formation of permeable formation heat time heating time, not only wastes energy during greater than 10 μ m, also can make the thin hardened layer of base material exceed zone of reasonableness simultaneously, can damage the fatigue behaviour of polished rod in various degree.Therefore, this permeable formation that the present invention determines makes that the combination between base material and the ni base alloy coating is tightr, thereby further improves overall performance.The thickness of described ni base alloy coating is 0.10mm～0.50mm.Concrete numerical value can be selected 0.10mm, 0.20mm, 0.30mm, 0.40mm, 0.50mm for use, and the ni base alloy coating of this thickness can fully satisfy demand of the present utility model, reaches reasonable effect.
And the surface roughness R of oil pumping polish rod of the present utility model
aSmaller or equal to 0.6 μ m, thereby the friction of minimizing oil pumping polish rod reduces the wearing and tearing of oil pumping polish rod, increases the service life.The hardness of described ni base alloy coating is 25HRC～38HRC; determining of this hardness range mainly based on the mechanical property of taking into account coating and anti-wear performance; thereby too low its anti-wear performance of hardness can decline to a great extent and be not enough to form effective protection to base material, and hardness is too high can be made the fragility of its coating strengthen cracking resistance line ability again to reduce.The kernel of section hardness of described base material is 35HRC～47HRC, determining of this hardness mainly based on the mechanical property of taking into account this specific polished rod base material and fatigue behaviour, too low its tensile strength of hardness and fatigue strength all are difficult to practical requirement, and hardness is too high can be occurred the very high but fatigue behaviour of tensile strength again and begin the problem that significantly descends.For above reason, finally determined the hardness requirement of the present invention to ni base alloy coating and base material, make the utility model can better be suitable for the requirement of relevant criterion, reach reasonable performance.
Under laboratory environment, adopt WE-1000 type universal hydraulic testing machine that oil pumping polish rod has been carried out 3 groups of tensile property evaluations, shown in the table 1 specific as follows.The result shows that MC oil pumping polish rod of the present invention not only satisfies rower SY/T5029-2006 to the regulation of HL oil pumping polish rod about plasticity index such as the elongation per unit length and the contraction percentages of area, and its tensile strength has also surpassed its standard-required, has embodied its higher supporting capacity.
Table 1
Under laboratory environment according to GB/T14452-1993 " metal bending mechanical test method " requirement, commonly used 20CrMo Ni-based coating surfacing oil pumping polish rod sample (hereinafter to be referred as the 20CrMo sample) in present oil field and the sample (hereinafter to be referred as the MC sample) in the utility model embodiment have been carried out the beam test contrast, the flexural strength that found that MC sample of the present utility model improves 31% than 20CrMo sample, the sample that contrasts simultaneously after the bend test can be found, the bending degree of 20CrMo sample is much larger than the MC sample, and also difference is bigger on crack number that specimen surface produces and length in the bend test process, on 20CrMo specimen surface coating, there are 3 to 5 length to surpass half big crackle and 10 above length short crack of being no more than sample circumference 1/4 of sample circumference, then have only 1 to 2 length to surpass half big crackle of sample circumference at the MC specimen surface, the quantity of short crack is usually about 6 to 7 simultaneously.Above result shows that MC oil pumping polish rod of the present utility model has anti-bending strength and the ability that resists the crackle generation preferably, can guarantee that it in use has better anti-bending strength and application life.
As seen, MC oil pumping polish rod in the utility model has the good comprehensive mechanical property, tensile strength is significantly improved, add its surperficial ni base alloy coating and have excellent wear and corrosion behavior and anti-bending strength preferably, make oil pumping polish rod of the present utility model can satisfy the Service Environment of oil field top load and erosion corrosion well.
Claims (6)
1. an oil pumping polish rod is characterized in that: comprise base material and the surfacing ni base alloy coating in described substrate surface, interpenetrate the formation permeable formation between described base material and the described ni base alloy coating.
2. a kind of oil pumping polish rod as claimed in claim 1 is characterized in that: the thickness of described permeable formation is 1 μ m～10 μ m.
3. a kind of oil pumping polish rod as claimed in claim 1 is characterized in that: the thickness of described ni base alloy coating is 0.10mm～0.50mm.
4. a kind of oil pumping polish rod as claimed in claim 1 is characterized in that: surface roughness Ra is smaller or equal to 0.6 μ m.
5. a kind of oil pumping polish rod as claimed in claim 1 is characterized in that: the hardness of described ni base alloy coating is 25HRC～38HRC.
6. a kind of oil pumping polish rod as claimed in claim 1 is characterized in that: the kernel of section hardness of described base material is 35HRC～47HRC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201506960U CN201574692U (en) | 2009-05-26 | 2009-05-26 | Oil-pumping polished rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201506960U CN201574692U (en) | 2009-05-26 | 2009-05-26 | Oil-pumping polished rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201574692U true CN201574692U (en) | 2010-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201506960U Expired - Fee Related CN201574692U (en) | 2009-05-26 | 2009-05-26 | Oil-pumping polished rod |
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| CN (1) | CN201574692U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628823A (en) * | 2012-08-20 | 2014-03-12 | 成都掌握移动信息技术有限公司 | Novel torsion oil pumping polish rod |
| CN103806846A (en) * | 2014-03-04 | 2014-05-21 | 东营咸亨工贸有限公司 | Anticorrosive wear-resistant oil pumping polished rod |
| CN104088590A (en) * | 2014-07-14 | 2014-10-08 | 铁岭米勒石油新材料有限公司 | Oil pumping polished rod and machining process |
| CN111020448A (en) * | 2019-12-12 | 2020-04-17 | 北京工商大学 | Wear-resistant anti-corrosion sucker rod coupling with oil storage and oil supplement channel on surface and preparation process |
-
2009
- 2009-05-26 CN CN2009201506960U patent/CN201574692U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628823A (en) * | 2012-08-20 | 2014-03-12 | 成都掌握移动信息技术有限公司 | Novel torsion oil pumping polish rod |
| CN103806846A (en) * | 2014-03-04 | 2014-05-21 | 东营咸亨工贸有限公司 | Anticorrosive wear-resistant oil pumping polished rod |
| CN104088590A (en) * | 2014-07-14 | 2014-10-08 | 铁岭米勒石油新材料有限公司 | Oil pumping polished rod and machining process |
| CN111020448A (en) * | 2019-12-12 | 2020-04-17 | 北京工商大学 | Wear-resistant anti-corrosion sucker rod coupling with oil storage and oil supplement channel on surface and preparation process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUANG JINBIN Free format text: FORMER OWNER: TIELING MILER OIL NEW MATERIAL CO., LTD. Effective date: 20120423 Owner name: LIU BOYING TIELING MILER OIL NEW MATERIAL CO., LTD Effective date: 20120423 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 112000 TIELING, LIAONING PROVINCE TO: 100054 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120423 Address after: 100054 Beijing Xicheng District City Canton Honglian Road No. 6 Academy of Music City District 6 Building 1 unit 202 room Co-patentee after: Liu Boying Patentee after: Huang Jinbin Co-patentee after: Tieling Miler Oil New Material Co., Ltd. Address before: 112000 Tieling technician Institute, Tieling, Liaoning (office building, room 315) Patentee before: Tieling Miler Oil New Material Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20130526 |