CN201062577Y

CN201062577Y - Dirty-scraping oil pump

Info

Publication number: CN201062577Y
Application number: CNU2007201497479U
Authority: CN
Inventors: 李耀辉; 王中武; 杜江; 张庚娟; 胡爱君
Original assignee: Anton Oilfield Services Group Ltd
Current assignee: Anton Oilfield Services Group Ltd
Priority date: 2007-06-20
Filing date: 2007-06-20
Publication date: 2008-05-21
Anticipated expiration: 2017-06-20

Abstract

The utility model relates to a dirt scraping oil pump, which mainly comprises a short pump barrel and a long plunger piston, an upper coupling is connected at the upper part of the short pump barrel, an upper dirt scraping device is fixedly arranged in the upper coupling, a lower coupling is connected at the lower end of the short pump barrel, an upper lengthening pipe is connected at the lower end of the lower coupling, an upper lengthening pipe coupling is connected at the lower end of the upper lengthening pipe, a lower dirt scraping device is fixedly arranged in the upper lengthening pipe coupling, a lower lengthening pipe is connected at the lower end of the upper lengthening pipe coupling, a lower lengthening pipe coupling is connected at the lower end of the lower lengthening pipe, a fixed valve bonnet is connected at the lower end of the lower lengthening pipe coupling, and a fixed valve seat connector is connected at the lower end of the fixed valve bonnet; an alloy spray welding layer is arranged on the inner surfaces of short pump barrel, the lower lengthening pipe and the lower lengthening pipe. The utility model has the advantages that the utility model has the performance of abrasion resistance, corrosion prevention and scale prevention, and the upper and lower dirt scraping devices are matched, a wiper ring, a valve ball and a valve seat are made by adopting hard metal alloy material, the operation of the utility model is convenient, the dirt scraping effect is obvious, the occurrence of stuck pump phenomenon can be avoided, and the service life is improved.

Description

A kind ofly scrape dirty oil well pump

Technical field

The utility model relates to the oil well liquid raising device technical field in the petroleum production, belongs to a kind of and scrapes dirty oil well pump, particularly long-plunger, alloy short pump barrel and have the dirty oil well pump of scraping of the upper and lower scraper device of adjustable position.

Background technique

The most of oil field of China has entered the middle and later periods of exploitation at present, geological state is increasingly sophisticated, along with pressure break, water filling, profile control,, change the enforcement of various well stimulations such as stifled, that polymer becomes, ternary becomes, add produced-water reinjection, make the character of extraction liquid that variation take place, cause oil recovery well the burn into fouling to occur, brought very big influence to crude oil production.In oil recovery process, be in particular in the following aspects:

1, corrosion brings fouling that the gap of oil well pump pump barrel and plunger is diminished gradually, forms holddown;

2, valve ball, valve seat fouling cause poorly sealedly, and leakage is serious, causes oil well pump to lose efficacy;

3, common oil well pump is generally long pump barrel, short column plug, and upper and lower section of pump barrel exists non-friction zone in the working procedure, the holddown when fouling of non-friction zone will cause transferring stroke and play plunger.

Utility model patent number 03239735.6 discloses a kind of " anti-scaling oil-well pump " and has just done improvement on common oil pump plunger piston, and normal suction is kept in the fouling that this pump can be removed the pump barrel friction surface at oil recovery process.The soft PTFE seal section that seals, though non-scaling, hardness is low, frictional force is very big, can occur under the long term high temperature wearing out, so pump efficiency decline can be very fast, and still there is non-friction zone in upper and lower section of pump barrel, and the fouling of non-friction zone will cause transferring behind the stroke and holddown when playing plunger.

The model utility content

In order to solve the difficulty that the oil well pump corrosion and scaling brings to crude oil production in the oil recovery well, overcome the deficiencies in the prior art, the purpose of this utility model provide a kind of simple in structure, easy to use, effect is lasting scrapes dirty oil well pump, it is remarkable that it scrapes dirty performance, can prolong the working life of oil well pump greatly; The long-pending sand and the fouling of plunger and pump barrel friction surface can be removed and stop at work, the generation of holddown accident in the work can be prevented effectively.

For achieving the above object, the utility model is taked following design proposal:

A kind ofly scrape dirty oil well pump, it mainly includes pump barrel, plunger, valve ball, valve seat, described pump barrel is a short pump barrel, described plunger is a long-plunger, be connected with box cupling in the short pump barrel upper end, be provided with scraper device at last box cupling internal fixation, be connected with box cupling down in the short pump barrel lower end, be connected with extension pipe in following box cupling lower end, be connected with the extension pipe box cupling in last extension pipe lower end, be provided with scraper device down at last extension pipe box cupling internal fixation, be connected with extension pipe down in the lower end of last extension pipe box cupling, extension pipe box cupling under the extension pipe lower end connects down is connected and fixed valve bonnet in following extension pipe box cupling lower end, and this standing valve cover lower end is connected and fixed valve base joint;

Short pump barrel, on extension pipe, down the internal surface surfacing of extension pipe has alloy spray welding overlay;

Described upper and lower scraper device comprises wiper ring overcoat, spring housing, wiper ring respectively, and this wiper ring is coated on the outer peripheral surface of plunger, is with spring housing on the outer peripheral surface of wiper ring, is with the wiper ring overcoat on this spring housing outer peripheral surface.

Outer surface surfacing at plunger has the Ni60 spray-welding coating, and valve ball adopts 40 chromium tungsten alloy materials to make, and valve seat adopts Hardmetal materials to make.

Above-mentioned wiper ring is that a plurality of halfround bar slices by the many pairs that are arranged side by side constitute.

As: above-mentioned wiper ring is that 6 halfround bar slices by three pairs that are arranged side by side constitute.

Above-mentioned wiper ring adopts the 38CrMoAl alloy material to make.

In order to regulate and compress wiper ring, be provided with opening slot at the sidewall of spring housing.

The utlity model has following advantage:

1, the present invention adopts long-plunger, short pump barrel structure, makes plunger have bigger degrees of freedom, and pump barrel and plunger are difficult for forming the dirt card aborning and the back that bumps off a well is difficult for taking place dirty buried column plug;

2, at the surfacing alloy spray welding overlay of the internal surface of short pump barrel and extension pipe, make its internal surface have very high hydrophoby, dirt is difficult for adhering to; External peripheral surface surfacing at plunger has the Ni60 spray-welding coating that screens through compatibility, make the external peripheral surface alloy spray welding overlay of the internal surface alloy spray welding overlay of short pump barrel, extension pipe and plunger form friction pair wear-resistant, anticorrosion, anti-scaling property is very excellent, can prolong the working life of oil well pump greatly;

3, plunger is provided with the upper and lower scraper device that has, and can remove and stop the long-pending sand and the fouling of plunger and pump barrel, extension pipe friction surface at work, has prevented the generation of holddown accident in the work effectively;

4, by on plunger, connecting the length of extension pipe, the position of scraper device under the can regulate, and then long-plunger realized that whole process scrapes dirt, and eliminated the friction dead angle, thoroughly solved the holddown problem when transferring stroke and playing plunger.

5, valve ball, valve seat are to adopt alloy material, make through precision optical machinery processing and strict heat treatment and process of surface treatment again, have extremely strong anticorrosion, antiscale and wear-resistant grain polishing machine.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A portion structure for amplifying schematic representation of Fig. 1.

Fig. 3 is the spring housing schematic perspective view.

Embodiment

Referring to Fig. 1, Fig. 2, shown in Figure 3: as a kind ofly to scrape dirty oil well pump, it mainly includes pump barrel, plunger, valve ball, valve seat, described pump barrel is a short pump barrel 5, described plunger is a long-plunger 6, be connected with box cupling 1 in short pump barrel 5 upper ends, be provided with scraper device at last box cupling 1 internal fixation, be connected with box cupling 7 down in short pump barrel 5 lower ends, be connected with extension pipe 8 in following box cupling 7 lower ends, be connected with extension pipe box cupling 9 in last extension pipe 8 lower ends, be provided with scraper device down at last extension pipe box cupling 9 internal fixation, be connected with extension pipe 10 down in the lower end of last extension pipe box cupling 9, extension pipe box cupling 11 under extension pipe 10 lower ends connect down is connected and fixed valve bonnet 12 in following extension pipe box cupling 11 lower ends, and these standing valve cover 12 lower ends are connected and fixed valve base joint 15;

Short pump barrel 5, on extension pipe 8, down the internal surface surfacing of extension pipe 10 has alloy spray welding overlay;

Described upper and lower scraper device comprises wiper ring overcoat 2, spring housing 3, wiper ring 4 respectively, this wiper ring 4 is coated on the outer peripheral surface of plunger, on the outer peripheral surface of wiper ring 4, be with spring housing 3, on these spring housing 3 outer peripheral surfaces, be with wiper ring overcoat 2.

Internal projecting ring 17 arranged in that last box cupling 1 is projecting inward, the upper end of the ring overcoat 2 in the last scraper device is by internal projecting ring 17 location, upper end at ring overcoat 2 is provided with internal projecting ring 18, in internal projecting ring 18 inboards spring housing 3 and wiper ring 4 are set, the lower end of this ring overcoat 2 holds out against the location by the upper end of short pump barrel 5, makes ring overcoat 2 be fixed on (see figure 2) in the box cupling 1; Following scraper device is arranged in the extension pipe box cupling 9, and ring overcoat 2 upper ends in the following scraper device hold out against the location by last extension pipe 8 lower ends, and these ring overcoat 2 lower ends hold out against the location by the internal projecting ring 19 in the last extension pipe box cupling 9.

Outer surface surfacing at plunger 5 has the Ni60 spray-welding coating, and valve ball 13 adopts 40 chromium tungsten alloys to make, and valve seat 14 adopts cemented carbide to make.

Described wiper ring 4 is that a plurality of halfround bar slices by the many pairs that are arranged side by side constitute.

The wiper ring 4 of present embodiment is that 6 halfround bar slices by three pairs that are arranged side by side constitute.

Above-mentioned wiper ring 4 adopts the 38CrMoAl alloy material to make.

In order to regulate and compress wiper ring, be provided with opening slot 16 at the sidewall of spring housing 3.

Minimal stroke during according to work determines to connect the length of extension pipe on short sleeve, thereby the whole process that realizes plunger is scraped dirt.

Because the internal surface surfacing at the pump barrel of scraping dirty oil well pump of the present utility model and extension pipe has alloy spray welding overlay and at long-plunger outer surface surfacing alloy spray welding overlay is arranged, make the friction pair that forms between the two, have wear-resistant, anticorrosion, anti-scaling property, cooperate upper and lower scraper device again, employing Hardmetal materials such as wiper ring, valve ball, valve seat are made simultaneously, make the working life that anti-scaling oil-well pump of the present utility model is easy to use, antiscaling effect remarkable, can avoid the holddown phenomenon to take place, improve oil well pump greatly.

Claims

1. scrape dirty oil well pump for one kind, it mainly includes pump barrel, plunger, valve ball, valve seat, it is characterized in that: described pump barrel is short pump barrel (5), described plunger is long-plunger (6), be connected with box cupling (1) in short pump barrel (5) upper end, be provided with scraper device at last box cupling (1) internal fixation, be connected with box cupling (7) down in short pump barrel (5) lower end, be connected with extension pipe (8) in following box cupling (7) lower end, be connected with extension pipe box cupling (9) in last extension pipe (8) lower end, be provided with scraper device down at last extension pipe box cupling (9) internal fixation, be connected with extension pipe (10) down in the lower end of last extension pipe box cupling (9), extension pipe box cupling (11) under extension pipe (10) lower end connects down is connected and fixed valve bonnet (12) in following extension pipe box cupling (11) lower end, and this standing valve cover (12) lower end is connected and fixed valve base joint (15);

Internal surface surfacing at short pump barrel (5), last extension pipe (8), following extension pipe (10) has alloy spray welding overlay;

Described upper and lower scraper device comprises wiper ring overcoat (2), spring housing (3), wiper ring (4) respectively, this wiper ring (4) is coated on the outer peripheral surface of plunger, on the outer peripheral surface of wiper ring (4), be with spring housing (3), on this spring housing (3) outer peripheral surface, be with wiper ring overcoat (2).

2. according to claim 1ly scrape dirty oil well pump, it is characterized in that: the outer surface surfacing at plunger (5) has the Ni60 spray-welding coating, and valve ball (13) adopts 40 chromium tungsten alloy materials to make, and valve seat (14) adopts Hardmetal materials to make.

3. according to claim 1 and 2ly scrape dirty oil well pump, it is characterized in that: described wiper ring (4) is that a plurality of halfround bar slices by the many pairs that are arranged side by side constitute.

4. according to the dirty oil well pump of scraping of claim described 3, it is characterized in that: described wiper ring (4) is that 6 halfround bar slices by three pairs that are arranged side by side constitute.

5. according to claim 4ly scrape dirty oil well pump, it is characterized in that: described wiper ring (4) adopts the 38CrMoAl alloy material to make.

6. according to claim 5ly scrape dirty oil well pump, it is characterized in that: the sidewall of described spring housing (3) is provided with opening slot (16).

7. according to claim 6ly scrape dirty oil well pump, it is characterized in that: in last box cupling (1), be provided with internal projecting ring (17), the upper end of the ring overcoat (2) in the last scraper device is located by internal projecting ring (17), upper end at ring overcoat (2) is provided with internal projecting ring (18), in internal projecting ring (18) inboard spring housing (3) and wiper ring (4) are set, the lower end of this ring overcoat (2) holds out against the location by the upper end of short pump barrel (5).