CN1900523A - Oil pump plunger - Google Patents
Oil pump plunger Download PDFInfo
- Publication number
- CN1900523A CN1900523A CN 200610088965 CN200610088965A CN1900523A CN 1900523 A CN1900523 A CN 1900523A CN 200610088965 CN200610088965 CN 200610088965 CN 200610088965 A CN200610088965 A CN 200610088965A CN 1900523 A CN1900523 A CN 1900523A
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- CN
- China
- Prior art keywords
- plunger
- pump
- pump barrel
- oil well
- coat
- 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.)
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Abstract
The plunger of oil well pump includes body of plunger rod, and connector with external thread being at two ends. A layer of corrosion resistant, anti abrasive alloy coat is spray coated on surface of body of plunger rod. In oil well pump working procedure, plunger makes pump movement inside pump barrel. Friction between outer surface of plunger and inner surface of pump barrel occurs. As time goes on, under action of microcosmic friction heat, partial components of coat on outer surface of plunger are detached, and attached to inner surface of pump barrel through microwelding effect. In further procedure, friction between corrosion resistant, anti abrasive components of coat attached to inner surface of pump barrel and surface of plunger plays effect of protecting inner surface of pump barrel so as to slow failure of pump barrel, and raise service life of oil well pump.
Description
Technical field
The invention belongs to the oil equipment field, be specifically related to a kind of oil pump plunger piston.
Background technique
The pumping unit sucker rod pumping is a kind of artificial lift oil production method, and is simple with its equipment, little 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, oiling valve, outlet valve.During upstroke, the following pump chamber below the plunger increases, and pressure reduces, and oiling valve descends thereon under the effect of pressure reduction and opens, and crude oil enters cavity of resorption; Meanwhile, outlet 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 oiling valve and the outlet valve is closed oiling valve, opens outlet 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, underground crude oil constantly is discharged from ground by oil well pump.
In the working procedure 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 action, when self outer 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 thickened oil recovery, polymer injection exploitation and deep-etching, also plunger is caused the corrosion failure effect, this corrosive action 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 eration, and workover eration 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 working life of how to improve oil well pump.
Be to reduce the wearing and tearing of oil pump plunger piston and pump barrel, present measure is to be coated with one deck chromium protective layer on the oil pump plunger piston surface, this plunger surface hardness height, highly polished, certain wear resistance and corrosion resistance arranged.But electrodeposited coating and matrix bond are not tight, have tangible interface, the composition of both sides, interface matrix and electrodeposited coating to differ very big between electrodeposited coating and the matrix, and its chemical potential difference is also very big.In case surface electrical coating owing to hard particles for example the scuffing of sand grains defective appears, cause exposing of matrix, under electrochemical action, corrosion process can be that the interface is expanded rapidly along the position of potential difference maximum, finally cause the sheet of coating to peel off, cause the inefficacy of plunger.This is the electrochromism reason of abrasive wear resistance not just.The high hardness of electrochromism coating has also been aggravated the wearing and tearing to oil well pump pump barrel internal surface simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of oil pump plunger piston that can improve the wear-resistant and corrosion resistance of plunger.
For achieving the above object, the present invention takes following design proposal: a kind of oil pump plunger piston, comprise having of stopper rod body and two ends of externally threaded joint, and it is characterized in that, be coated with one deck anticorrosive wear-resistant on described stopper rod body surface and decrease alloy coat.
The thickness of described alloy coat is 0.25mm～0.4mm.
Described alloy coat comprises the component of following weight ratio: chromium 14%～17%, iron≤8%, silicon 3.5%～5%, boron 2.8%～3.8%, carbon 0.5%～1%, nickel 65.2%～78.9%.
Advantage of the present invention is: 1, oil pump plunger piston of the present invention, comprise having of stopper rod body and two ends of externally threaded joint, and be coated with one deck anticorrosive wear-resistant on the stopper rod body surface and decrease alloy coat.In the oil well pump working procedure, plunger pumps in pump barrel inside, and outer plunger surface and pump barrel internal surface rub.On microcosmic, from point of view of tribology, two surfaces are not fully smooth smooth, has rough surface undulation, in two surperficial relative movement processes, along with the prolongation of friction time, part outstanding relatively on the surface can be split away off by the other side surface " cutting ", under the effect of Micro Lub heat, the cladding material that splits away off can be attached to the other side's depression in the surface place by " microwelding " effect simultaneously.The anticorrosive wear-resistant of plunger surface decreases coating promptly by this way; in the friction process of plunger and pump barrel; transfer on the pump barrel internal surface from plunger surface; rub mutually with plunger surface; thereby played the effect of certain protection pump barrel internal surface; slow down the inefficacy of pump barrel, improve the working life of oil well pump on the whole.
2, oil pump plunger piston of the present invention, wherein alloy coat comprises the component of following weight ratio: chromium 14%～17%, iron≤8%, silicon 3.5%～5%, boron 2.8%～3.8%, carbon 0.5%～1%, nickel 65.2%～78.9%.In this coating, add big and boron, the element silicon of deoxidation voluntarily, be used for removing the oxygen of fused coating and basal body interface, guarantee good wetting matrix basal plane, matrix surface is had self-fluxing nature with oxygen affinity.In addition, boron, element silicon can at high temperature generate eutectic alloy with elements such as iron in the alloy powder, cobalt, nickel, and the fusing point of sintered alloy is reduced significantly.In addition, boron, element silicon play solution strengthening and dispersion-strengthened action to the metallographic structure of alloy coat, increase substantially the surface hardness of coating.
Description of drawings
Fig. 1 is a structural representation of the present invention
Embodiment
As shown in Figure 1, oil pump plunger piston of the present invention comprises having of stopper rod body 3 and two ends of externally threaded joint 1,4, it is characterized in that, is coated with one deck anticorrosive wear-resistant on stopper rod body 3 surfaces and decreases alloy coat 2.
The thickness of alloy coat 2 is 0.25mm.If the thickness of coating 2, then can not guarantee the normal wear consumption of plunger in the normal use age fully less than 0.25mm.
The thickness of alloy coat 2 is 0.3mm.
The thickness of alloy coat 2 is 0.4mm, if the thickness of coating 2 greater than 0.4mm, the then corresponding cost that can improve product.
Embodiment one, and alloy coat comprises the component of following weight ratio: 14% chromium, 6% iron, 4% silicon, 3% boron, 0.8% carbon, 72.2% nickel.
Embodiment two, and alloy coat comprises the component of following weight ratio: 14.3% chromium, 3.5% silicon, 2.8% boron, 0.5% carbon, 78.9% nickel.
Embodiment three, and alloy coat comprises the component of following weight ratio: 17% chromium, 8% iron, 5% silicon, 3.8% boron, 1% carbon, 65.2% nickel.
The making method of oil pump plunger piston of the present invention comprises the following steps:
One, the preparation of alloy powder mixture, the powdery metal raw material that is about to following weight ratio mixes: 14% chromium, 6% iron, 4% silicon, 3% boron, 0.8% carbon, 72.2% nickel;
Two, spraying is made of alloy powder: at first, the alloy powder mixture that obtains in the step 1 is poured in the smelting furnace pot body, under 1000 ℃～1150 ℃ temperature, made alloy powder mixture be fused into liquid alloy, and remove surperficial slag; Then, open leting slip a remark of smelting furnace bottom of pot body, utilize the pressurized gas of the 0.78MPa～0.82MPa of pressurized gas spray gun ejection the liquid alloy thread that spills from leting slip a remark of smelting furnace bottom of pot body to be cut as air knife, make the liquid alloy thread be atomized into atomic little molten drop, molten drop is in dropping process, be frozen into alloy powder under the cooling action of the air-flow that the pressurized gas spray gun forms, alloy powder falls into the vessel of the drying of the cleaning bottom the smelting furnace; Utilize 150 orders～300 purpose sieves that the alloy powder in the vessel is sieved at last, the screenings that obtains is the spraying alloy powder;
Three, stopper rod body surface preparation to the 100# belt sanding alligatoring of plunger rod surface, and makes surface active, guarantees stopper rod body cleaning surfaces, no greasy dirt;
Four, to the preheating of plunger rod surface, spraying; At first, plunger is passed the inductor coil of KGPS-160KW/8KHZ type medium frequency induction heater in the production of Shanghai China instrument induction heating equipment Co., Ltd, the two ends of plunger are fixed on plunger fixedly on the lathe by connecting rod, the chuck that has internal thread, and plunger fixedly lathe has the slewing gear and the shifter that can drive plunger; The speed with 19mm/s～21mm/s moves to allow plunger rotate in the heating coil of medium frequency induction heater vertically with 145 rev/mins～155 rev/mins speed then, make the stopper rod body surface from top to terminal successively by the heating coil preheating of medium frequency induction heater one time, during preheating, the output power of medium frequency induction heater remains on 19KW～21KW, with the moisture of removing plunger surface and the temperature that improves 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, be about to the medium frequency induction heater power-off after the preheating one time; And be heated the plunger of stretching from the heating coil end back is the spraying alloy powder that obtains the metallic dust spray gun spraying above-mentioned steps two of QT-E20000-7/h with the model of auspicious the spray coating mechanical Co., Ltd production in Shanghai at once, until the end that has sprayed stopper rod body, spraying is transported in the metallic dust spray gun by air pump with alloy powder during spraying, and in the metallic dust spray gun, mix the back with oxygen and acetylene and send from spray gun port, the oxygen flow that wherein is transported to the metallic dust spray gun is 0.39m
3/ h～0.41m
3/ h, acetylene flow are 0.79m
3/ h～0.81m
3/ h, the gas pressure of air pump are 0.023MPa～0.025Mpa;
Five, after the stopper rod body terminal has been sprayed, the speed that stopper rod body is being rotated in the heating coil of medium frequency induction heater vertically with 19mm/s～21mm/s with 145 rev/mins～155 rev/mins speed moves round about, and with the metallic dust spray gun stopper rod body is sprayed second time; If having relatively high expectations, coating thickness sprays the 3rd time;
Six, remelting cooling, KGPS-160KW/8KHZ type medium frequency induction heater carried out the surface induction heating to stopper rod body during employing Shanghai China instrument induction heating equipment Co., Ltd produced, the output power of medium frequency induction heater remains on 103KW～107KW, the coil of the relative medium frequency induction heater of plunger rotates and straight line motion, the rotational velocity of plunger is 145 rev/mins～155 rev/mins, plunger travelling speed vertically is 13mm/s～15mm/s, it is mobile that powder is fully melted, and make plunger under rotary state in air under the natural cooling; This sprayfused coating forms metallurgy combination by remelting processing and plunger body material, the composition of coating and the composition of matrix be mutual scattering and permeating in reflow process, between coating and body material, there is certain thickness transition zone, the composition that makes coating arrive matrix changes slow relatively, avoided forming the interface of composition sudden change, also problem with regard to having avoided the electrochromism coating after defective appears in the surface, to cause the coating sheet to come off because of the expansion of corroding.
Seven, to the plunger polishing, promptly adopt the polishing of 100# abrasive band and 200# belt sanding successively, making the plunger surface coating thickness is 0.25mm or 0.3mm or 0.4mm scope, roughness is no more than Ra0.4 μ m.If the thickness of coating, then can not guarantee the normal wear consumption of plunger in the normal use age fully less than 0.25mm, if the thickness of coating greater than 0.4mm, then will cause the plunger cost too high.
Claims (3)
1, a kind of oil pump plunger piston comprises having of stopper rod body and two ends of externally threaded joint, it is characterized in that, is coated with one deck anticorrosive wear-resistant on described stopper rod body surface and decreases alloy coat.
2, oil pump plunger piston according to claim 1 is characterized in that, the thickness of described alloy coat is 0.25mm～0.4mm.
3, oil pump plunger piston according to claim 1 and 2 is characterized in that, described alloy coat comprises the component of following weight ratio: chromium 14%～17%, iron≤8%, silicon 3.5%～5%, boron 2.8%～3.8%, carbon 0.5%～1%, nickel 65.2%～78.9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100889656A CN100390415C (en) | 2006-07-27 | 2006-07-27 | Oil pump plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100889656A CN100390415C (en) | 2006-07-27 | 2006-07-27 | Oil pump plunger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1900523A true CN1900523A (en) | 2007-01-24 |
| CN100390415C CN100390415C (en) | 2008-05-28 |
Family
ID=37656478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100889656A Active CN100390415C (en) | 2006-07-27 | 2006-07-27 | Oil pump plunger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100390415C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913446A (en) * | 2012-11-07 | 2013-02-06 | 四川久信科技集团有限公司 | Plunger piston and manufacturing method thereof |
| CN104564651A (en) * | 2014-12-31 | 2015-04-29 | 无锡威孚马山油泵油嘴有限公司 | Electronic control individual plunger |
| CN106150992A (en) * | 2015-04-08 | 2016-11-23 | 大庆森恩浦机械制造有限公司 | Titanium-aluminium alloy ceramic oil-pump |
| CN108103412A (en) * | 2017-12-28 | 2018-06-01 | 赛克思液压科技股份有限公司 | A kind of plunger |
| CN108118259A (en) * | 2017-10-31 | 2018-06-05 | 宁波百瑞天然气高压压缩机有限公司 | A kind of Wear-resisting plunger and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2249833Y (en) * | 1996-01-16 | 1997-03-19 | 吕新青 | Hydraulic sealing soft piston |
| JPH09242113A (en) * | 1996-03-08 | 1997-09-16 | Ube Ind Ltd | Dredging and disposing device |
| CN2687305Y (en) * | 2003-08-29 | 2005-03-23 | 北京安东奥尔工程技术有限责任公司 | Anticorrosive anti-wear oil-pumping polish rod |
| CN1687595A (en) * | 2005-05-23 | 2005-10-26 | 闻本良 | Ceramics plunger in oil well pump |
-
2006
- 2006-07-27 CN CNB2006100889656A patent/CN100390415C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913446A (en) * | 2012-11-07 | 2013-02-06 | 四川久信科技集团有限公司 | Plunger piston and manufacturing method thereof |
| CN102913446B (en) * | 2012-11-07 | 2015-10-21 | 四川中物泰沃新材料有限公司 | A kind of plunger and manufacture method thereof |
| CN104564651A (en) * | 2014-12-31 | 2015-04-29 | 无锡威孚马山油泵油嘴有限公司 | Electronic control individual plunger |
| CN106150992A (en) * | 2015-04-08 | 2016-11-23 | 大庆森恩浦机械制造有限公司 | Titanium-aluminium alloy ceramic oil-pump |
| CN108118259A (en) * | 2017-10-31 | 2018-06-05 | 宁波百瑞天然气高压压缩机有限公司 | A kind of Wear-resisting plunger and preparation method thereof |
| CN108103412A (en) * | 2017-12-28 | 2018-06-01 | 赛克思液压科技股份有限公司 | A kind of plunger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100390415C (en) | 2008-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Anton New Material Technology Co., Ltd. Assignor: Anton Oilfield Services (Group) Ltd. Contract fulfillment period: 2008.9.20 to 2014.9.19 contract change Contract record no.: 2008990000973 Denomination of invention: Wear resisting gap-free sealed oil pump plunger Granted publication date: 20080528 License type: Exclusive license Record date: 20081028 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.9.20 TO 2014.9.19; CHANGE OF CONTRACT Name of requester: BEIJING ANDONG NEW MATERIALS TECHNOLOGY CO., LTD. Effective date: 20081028 |