CN101586237A - Hot spray processing technique for alloy coating of AOF bidirectional protecting oil pump plunger - Google Patents
Hot spray processing technique for alloy coating of AOF bidirectional protecting oil pump plunger Download PDFInfo
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- CN101586237A CN101586237A CNA2008101125846A CN200810112584A CN101586237A CN 101586237 A CN101586237 A CN 101586237A CN A2008101125846 A CNA2008101125846 A CN A2008101125846A CN 200810112584 A CN200810112584 A CN 200810112584A CN 101586237 A CN101586237 A CN 101586237A
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- plunger
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- oil pump
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Abstract
The invention relates to a hot spray processing technique for an alloy coating of an AOF bidirectional protecting oil pump plunger. The processing technique comprises the following steps: carrying out surface oil removal treatment on an oil pump plunger blank; burnishing and roughening the blank by an abrasive band; preheating the treated blank to 300 DEG C for surface activation; then pre-spraying alloy powder with the thickness about 0.2 mm to protect the surface of the plunger from contacting air indirectly; continuously spraying till the ultimate thickness of the coating reaches 0.4 mm; heating the plunger blank by an intermediate induction heating device after spraying is completed for remelting of the alloy coating, wherein the remelting temperature is about 1,000 DEG C; and finally burnishing and polishing to prepare the AOF bidirectional protecting oil pump plunger by using No.100 and No.200 abrasive bands. The processing technique has simple and convenient operation, the coating is combined closely after spraying; the performance of a basal body of the plunger is not influenced during coating; and the thickness of the coating is more than 0.25 mm, and the coating can resist outside wearing and corrosion, and reduce the wearing to the inner surface of a pump cylinder of an oil well pump.
Description
Technical field
The present invention relates to a kind of hot spray processing technique of AOF bidirectional protective oil pump plunger alloy coat, belong to the oil equipment manufacture field.
Background technology
The oil pumper sucker rod pumping is a kind of artificial lift oil production method, and is simple with its equipment, less investment, and convenient management, advantage such as adaptability is strong is extensively adopted by each main oilfield both at home and abroad.The quality of sucker rod pumping equipment performance has very important effect in field of petroleum exploitation.Oil well pump is one of them important component part, be by under oil pipe and the sucker rod in well and be submerged in the following certain depth of liquid level, oil discharged ground by swabbing action.Oil well pump mainly is made up of pump barrel, plunger, fuel charging valve, delivery valve.During upstroke, the following pump chamber below the plunger increases, and pressure reduces, and fuel charging valve descends thereon under the effect of pressure reduction and opens, and crude oil enters cavity of resorption; Meanwhile, delivery valve descends thereon under the differential pressure action and cuts out, and the crude oil in the last pump chamber above the plunger is discharged to ground along oil pipe.In like manner, during down stroke, the crude oil between plunger compression fuel charging valve and the delivery valve is closed fuel charging valve, opens delivery valve, and following pump chamber crude oil enters pump chamber.Plunger one on the other, oil well pump has been finished once circulation.So go round and begin again, subterranean crude oil constantly is discharged from ground by oil well pump.
In the working process of oil well pump, the plunger that pumps of in pump barrel, going round and beginning again inevitably with pump barrel internal surface generation rubbing effect, when self outside surface weares and teares, also the pump barrel internal surface has been caused destruction.In addition, domestic oil field generally enters the high water-cut development later stage, because the high factor affecting such as media environment that contain sand, high moisture, high salinity, high-temperature steam viscous oil recovery, polymer injection exploitation and deep-etching, also plunger is caused the corrosion failure effect, this corrosive nature has more been aggravated the wearing and tearing of plunger simultaneously.
Because the wearing and tearing of oil pump plunger piston and pump barrel cause oil well pump to lose efficacy, the result causes workover treatment, and workover treatment has also been lost output simultaneously except that causing the well workover expense.Therefore be that oilfield exploitation is badly in need of one of major issue that solves the work-ing life of how to improve oil well pump.
Oil pump plunger piston surface chemistry coating in the past and some other coating, though slowed down the wearing and tearing of plunger to a certain extent, improved the plunger erosion resistance, but because the raising of self surface hardness, unavoidably cause aggravation, the normal work-ing life of having reduced pump barrel to the wearing and tearing of pump barrel internal surface.
Summary of the invention
The objective of the invention is to provide a kind of AOF bidirectional protective oil pump plunger surface alloy coating hot-spraying technique; by rational technical process and machining control; the abrasion-proof corrosion-proof coating and the plunger body of plunger surface are combined closely in molten state; do not destroy plunger body; and can form the coating transitional zone; the galvanic corrosion that reduces after cut produces causes the integral body of coating to peel off; the protection plunger is resisted the abominable corrosive environment in down-hole for a long time; improve the plunger wear resistance, and effectively reduce wearing and tearing simultaneously the pump barrel internal surface.
A kind of AOF bidirectional protective oil pump plunger alloy coating hot-spraying technique is the technology that forms the wear-and corrosion-resistant coating by operations such as surface coarsening activation treatment, spraying, remelting, polishings at plunger surface.With the 100# abrasive band plunger blank is polished, make plunger blank surface coarsening, the polishing back keeps coarse surface cleaning, no greasy dirt.Plunger surface is heated to 300 ℃ afterwards.Utilize thermal spraying apparatus to spray one deck powdered alloy in advance at plunger surface, the about 0.2mm of thickness does not directly contact with air with the protection plunger surface.Adjust the dusty spray powder sending quantity then and continue spraying, coat-thickness is reached more than the 0.4mm.
By temperature control measures such as control Frequency Induction Heating parameter and plunger movement speed, can reduce coating stress, improve coating and high base strength.By reasonable pilot-gas pressure, spray distance and spray angle, obtain high spray rate, high sedimentation effect and uniform coating structure.After can making coating and plunger matrix bond, the metallographic structure of matrix metal does not change, and forms the abrasion-proof corrosion-proof erosion resisting coating of thickness greater than 0.25mm, evenly securely with the plunger matrix bond, make plunger keep enough wear resistant corrosion resistant characteristic and tensile strength.After the thermospray, set, utilize the ruhmkorff coil of Medium frequency induction equipment that the plunger that has the thermal spraying alloy coating is done the surface remelting processing by specific electronics Machine-Tool Control and reasonable parameter.
Its major advantage is easy and simple to handle, and is economical and practical, is convenient to reasonable CONTROL PROCESS flow process, and the spray efficiency height is saved powdered alloy, and the coating after the spraying is in conjunction with tight, and coating procedure does not influence the metallographic structure of plunger body material.
Can form the coating of thickness greater than the wear-and corrosion-resistant low-friction coefficient of 0.25mm; can adapt to extraneous friction and corrosion; and part alloy coat composition shifts the pump barrel inwall with sheet form in friction process, plays the bidirectional protective function of not only protecting plunger but also protecting pump barrel.
Description of drawings
Fig. 1 is an AOF bidirectional protective oil pump plunger surface alloy coating spraying process flow diagram.
Embodiment
AOF bidirectional protective oil pump plunger surface alloy coating spraying technology, undertaken by follow procedure:
1, surface preparation.Plunger surface 100# belt sanding alligatoring, and make surface active, guarantee cleaning surfaces, no greasy dirt.
2, preheating.Remove the temperature of the moisture and the raising plunger surface of plunger surface, increase powder adhesive bond rate, avoid too much powder to impinge upon the bounce-back loss that is caused on the cold workpiece.Preheating temperature generally about 300 ℃, promptly nearly turn blue or just turned blue and get final product by the plunger surface color.
3, dust in advance.The plunger surface temperature rises to 1000 ℃ the most at last in the spraying process.When surface temperature progressively is increased to more than 400 ℃, surface metal will produce high temperature oxidation.For anti-generation of planting phenomenon here, spray one deck powdered alloy in advance at plunger surface, directly do not contact with the protection plunger surface with air.Pre-spray thickness is about 0.2mm, and oxyacetylene torch adopts neutral flame or faint carbonizing flame when spraying in advance, and the plunger surface temperature is controlled at 250～350 ℃.
4, dust.The lathe walking drives plunger simultaneously and rotates, and adjusts powder sending quantity, and final coat-thickness is reached about 0.4mm.
5, remelting cooling.Adopt surface induction heating remelting, remelting temperature is controlled at coating and the minute surface phenomenon occurs, and temperature is about 1000 ℃, and powder fully melts mobile, and plunger is cooled down under rotary state.
6, polishing.Adopt 100# old sand band, 200# abrasive band to polish repeatedly, make the plunger surface coat-thickness greater than 0.25mm, roughness is no more than Ra0.4 μ m.
Claims (1)
1; a kind of hot spray processing technique of AOF bidirectional protective oil pump plunger alloy coat; it is characterized in that; the plunger blank is carried out surface degreasing to be handled; with the abrasive band alligatoring of polishing; be preheating to 300 ℃ then and make surface active; the thick powdered alloy of the pre-about 0.2mm of spraying; directly do not contact with the protection plunger surface with air; continue spraying then; make the coating final thickness reach 0.4mm; make the alloy coat remelting with the intermediate frequency induction heating device heating after spraying is finished, about about 1000 ℃ of remelting temperature is used 100# and 200# belt sanding at last; polishing is promptly made coat-thickness greater than 0.25mm AOF bidirectional protective oil pump plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101125846A CN101586237A (en) | 2008-05-23 | 2008-05-23 | Hot spray processing technique for alloy coating of AOF bidirectional protecting oil pump plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101125846A CN101586237A (en) | 2008-05-23 | 2008-05-23 | Hot spray processing technique for alloy coating of AOF bidirectional protecting oil pump plunger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101586237A true CN101586237A (en) | 2009-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101125846A Pending CN101586237A (en) | 2008-05-23 | 2008-05-23 | Hot spray processing technique for alloy coating of AOF bidirectional protecting oil pump plunger |
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| CN (1) | CN101586237A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435579A (en) * | 2016-11-26 | 2017-02-22 | 中能企服（北京）技术服务有限公司 | Oil pumping polish rod metal spray welding device and production process thereof |
| CN110527941A (en) * | 2019-08-19 | 2019-12-03 | 湖北丰凯机械有限公司 | A kind of processing technology based on the manufacture of pressure regulation of engine oil valve plunger |
| CN111621782A (en) * | 2020-06-29 | 2020-09-04 | 江苏科环新材料有限公司 | Method for preparing protective coating by high-frequency induction heating and then powder feeding reciprocating forming-remelting |
| CN115418601A (en) * | 2022-08-26 | 2022-12-02 | 南京市特种设备安全监督检验研究院 | High-frequency induction heating heavy fusible link and method for preparing anti-explosion coating of anti-explosion forklift fork |
-
2008
- 2008-05-23 CN CNA2008101125846A patent/CN101586237A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435579A (en) * | 2016-11-26 | 2017-02-22 | 中能企服（北京）技术服务有限公司 | Oil pumping polish rod metal spray welding device and production process thereof |
| CN110527941A (en) * | 2019-08-19 | 2019-12-03 | 湖北丰凯机械有限公司 | A kind of processing technology based on the manufacture of pressure regulation of engine oil valve plunger |
| CN111621782A (en) * | 2020-06-29 | 2020-09-04 | 江苏科环新材料有限公司 | Method for preparing protective coating by high-frequency induction heating and then powder feeding reciprocating forming-remelting |
| CN115418601A (en) * | 2022-08-26 | 2022-12-02 | 南京市特种设备安全监督检验研究院 | High-frequency induction heating heavy fusible link and method for preparing anti-explosion coating of anti-explosion forklift fork |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20091125 |