CN100460678C

CN100460678C - Antiscaling alloy oil sucking pump

Info

Publication number: CN100460678C
Application number: CNB2007101190747A
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: 2007-06-19
Filing date: 2007-06-19
Publication date: 2009-02-11
Anticipated expiration: 2027-06-19
Also published as: CN101074664A

Abstract

The invention discloses an alloy anti-fouling oil extractor including the short pump canister and long plunger piston. The up connecting hoop is connected to the short pump canister top; which is fixed with the up scraping device; the lower is connected with the down connecting hoop which the lower is connected with the up lengthen pipe which the lower is connected with the up lengthen pipe connecting hoop which is fixed with the down scraping device. The up lengthen pipe connecting hoop lower is connected with the down lengthen pipe which the lower is connected with the lower lengthen pipe hoop which the lower is connected with the fixed valve cover which the lower is connected with the fixed valve seat joint; the alloy welding layer is sprayed on the inner side of the short pump canister, the up lengthen pipe and the down lengthen pipe. The invention can resist the abrasion, the rotten and dirty. The up and down scraping devices and the scraping ring, the valve ball, the valve seat are made by the hard alloy material. The invention can avoid block the pump to improve the using life.

Description

Antiscaling alloy oil sucking pump

Technical field

The present invention relates to the oil well liquid raising device technical field in the petroleum production, belong to a kind of anti-scaling oil-well pump, particularly long-plunger, alloy short pump barrel and have the anti-scaling oil-well pump 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, enforcement along with various well stimulations such as pressure break, water filling, profile control, change are blocked up, 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.

Summary of the invention

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 invention is to provide a kind of simple in structure, easy to use, antiscaling alloy oil sucking pump that effect is lasting, its anti-scaling property is remarkable, 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 present invention takes following design proposal:

A kind of antiscaling alloy oil sucking 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 to constitute by vertically arranging a plurality of halfround bar slices of many pairs that are provided with successively.

As: above-mentioned wiper ring is to constitute by vertically arranging 6 halfround bar slices of second mate that are provided with successively.

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 present invention has the following advantages:

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 invention.

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: a kind of antiscaling alloy oil sucking 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.

Bulge loop 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 bulge loop 17 location, be provided with internal projecting ring 18 in the upper end of wiper ring overcoat 2, in internal projecting ring 18 inboards spring housing 3 and wiper ring 4 are set, the lower end of this wiper ring overcoat 2 holds out against the location by the upper end of short pump barrel 5, makes wiper 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 wiper ring overcoat 2 upper ends in the following scraper device hold out against the location by last extension pipe 8 lower ends, and these wiper 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 to constitute by vertically arranging a plurality of halfround bar slices of many pairs that are provided with successively.

The wiper ring 4 of present embodiment is to constitute by vertically arranging three secondary 6 halfround bar slices that are provided with successively.

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.

Owing to alloy spray welding overlay is arranged and alloy spray welding overlay is arranged at long-plunger outer surface surfacing at the pump barrel of anti-scaling oil-well pump of the present invention and the internal surface surfacing of extension pipe, 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 invention is easy to use, antiscaling effect remarkable, can avoid the holddown phenomenon to take place, improve oil well pump greatly.

Claims

1. antiscaling alloy oil sucking pump, 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, be connected and fixed valve bonnet (12) in following extension pipe box cupling (11) lower end, 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. antiscaling alloy oil sucking pump according to claim 1 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. antiscaling alloy oil sucking pump according to claim 1 and 2 is characterized in that: described wiper ring (4) is to constitute by vertically arranging a plurality of halfround bar slices of many pairs that are provided with successively.

4. according to the antiscaling alloy oil sucking pump of claim described 3, it is characterized in that: described wiper ring (4) is to constitute by vertically arranging three secondary 6 halfround bar slices that are provided with successively.

5. antiscaling alloy oil sucking pump according to claim 4 is characterized in that: described wiper ring (4) adopts the 38CrMoAl alloy material to make.

6. antiscaling alloy oil sucking pump according to claim 5 is characterized in that: the sidewall of described spring housing (3) is provided with opening slot (16).

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