CN103133339A - Two-stage compression oil well pump and oil pump process thereof - Google Patents
Two-stage compression oil well pump and oil pump process thereof Download PDFInfo
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- CN103133339A CN103133339A CN 201110404978 CN201110404978A CN103133339A CN 103133339 A CN103133339 A CN 103133339A CN 201110404978 CN201110404978 CN 201110404978 CN 201110404978 A CN201110404978 A CN 201110404978A CN 103133339 A CN103133339 A CN 103133339A
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Abstract
The invention discloses a two-stage compression oil well pump which is mainly composed of an upper pump cylinder (2), a lower pump cylinder (7), an upper plunger (1), an upper oil outlet valve (3), a lower plunger (6), a lower oil outlet valve (8) and an oil inlet valve (10), wherein the upper pump cylinder (2) and the lower pump cylinder (7) are mutually communicated, the upper plunger (1) and the upper oil outlet valve (3) are arranged on the interior of the upper pump cylinder (2), and the lower plunger (6), the lower oil outlet valve (8) and the oil inlet valve (10) are arranged on the interior of the lower pump cylinder (7). Further disclosed is an oil pump process based on the two-stage compression oil well pump. The two-stage compression oil well pump and the oil pump process based on the two-stage compression oil well pump are applicable to an oil well with a high gas-oil ratio. In a down stroke, an upper travelling valve is closed, downward moving of the plungers is benefited, a stress condition of an oil pump rod is better, when the gas-oil ratio is large, an upper working cavity is much smaller than a lower working cavity, and the two-stage compression oil well pump and the oil pump process based on the two-stage compression oil well pump are beneficial for a heavy oil well with high gas content.
Description
Technical field
The present invention relates to a kind of two stage compression oil well pump and oil pumping technique thereof.
Background technique
Before 20th century, oil well pump technical development both at home and abroad is slow, to the 20 middle of century integeral tube pumping pump that just begins one's study, produces simultaneously with the bush type oil well pump.About oil well pump controversial two large problems technically: the one, whole cylinder type oil pump is good, should the bush type oil well pump; The 2nd, be to have anti-sand launder good on plunger, should be without anti-sand launder.Until the eighties in 20th century, because integeral tube pumping pump has significantly improved pump efficiency, generally approximately improve 10% than bush type oil well pump, extended the working life of plunger pump barrel pair, and can save the high-quality steel of 40% left and right, progressively replaced the bush type oil well pump, eliminated the bush type oil well pump in the scale of the relevant oil well pump of U.S. API, this is one of main technological progress of oil well pump in recent years.
The oil well pump system history of existing more than 100 year, along with developing rapidly of petroleum industry, oil well pump develops into by simple bush pump the multifunctional oil-well pump that pump efficiency is high, energy-conservation and adapt to different needs.
In order to adapt to the needs of oil production technology, develop successively the oil well pump of various specific types, as be applicable to the double-acting pump of large lifting rate; The two stage compression oil well pump and the machinery that are applicable to high oil-gas ratio open and close the gas prevention pumps such as valve oil-well pump; Be applicable to take out streamlined pump and the hydraulic feedback pump of viscous crude; Be applicable to the self lubricating sand-control pump of sand output well, telescopic three pipes are put the sand-control pumps such as sand pump and sand control holddown; Be applicable to the gap bridge pump of deep well; Be applicable to the inclined shaft deep-well pump of deflecting well oil withdrawal; Be applicable to the hollow pump of pump test or heating, for what reduce submergence bar jet flow pressurizing pump etc. arranged.In order to extend oil well pump working life, improving aspect the oil well pump component, mainly take to improve the durability of pump plunger and barrel pair and the reliability of valve group.
Pump barrel has adopted multiple raw material and heat treatment process, except nitriding, has developed carbon, helium and has oozed altogether and Hard Chromium Plating Technology.Plunger has also developed surfacing nickel-base alloy and the technique such as ceramic coated except adopting Hard Chromium Plating Technology.It should be noted that in order to improve the durability of pump barrel-trunk piston set, according to the characteristics Proper Match pump barrel of oil well and the material of plunger, adopt Hard Chromium Plating Technology better as pump barrel in the high salinity medium, and plunger also adopt the hard chromium plating effect unsatisfactory.In order to improve valve group reliability and anti-anti-corrosive properties, the general stainless steels of material substitution such as high carbon chromium stainless steel commonly used and casting cobalt.
At the oil well of oilfield exploitation middle and later periods or the oil well of producing fluid level low oil well, particularly high gas-liquid ratio, gas is one of principal element that affects pumping efficiency of oil pump.Oil well pump exists free gas, solution gas in pump chamber (part in pump barrel between traveling valve and standing valve) in the pumping process.
During the pump upstroke, if the pressure in pump chamber is dissolved in the saturation pressure of liquid lower than gas, the gas that is dissolved in liquid will dissociate out from liquid.These gases occupy the certain volume of pump chamber, cause the degree of filling of pump to reduce, and then cause that pump efficiency descends.
During the pump down stroke, gas-liquid two-phase fluid is compressed in pump chamber, until the pump chamber internal pressure is during greater than the pressure on traveling valve top, traveling valve is just opened, and the crude oil in pump chamber is discharged.Yalve Balls of Sucker Rod Pumps in the gassiness oil well generally all can be opened hysteresis, when the occupied volume of the gas in pump chamber is enough large, not only traveling valve is not opened during down stroke, even standing valve might not opened yet during upstroke, be that intracavity gas is expanding and compression in whole upper and lower stroke, and there is no the liquid lifting, this moment, " gas lock " phenomenon appearred in oil well pump, can't work.Also often " hydraulic shock " can occur when " gas lock ", cause the vibration of rod pumping system, accelerate its damage.
For high oil-gas ratio oil reservoir in adopting the sucker rod pumping technique process, to such an extent as to affecting the unlatching of wear-resistant, free gas and solution gas make the problems such as the too low generation of extracting device of oil pump efficiency " gas lock ", all carried out more research both at home and abroad, take Counter-measures, also obtained corresponding achievement.
Both at home and abroad the technology taked of oil field mainly from reduce the gassiness that advances pump liquid than and reduce to enter two aspects that affect that the pump free gas opens pump valve and carry out.The former reduces jig frequency and adopts various gas anchors and bleed off casing gas in good time and realize mainly by increasing submergence; The latter reduces clearance volume and adopts the airlock-resistant oil pump of special construction to reach by strengthening length of stroke.This main difference wherein is that the gas-tight principle of airlock-resistant oil pump is different, reduces the anti-gas lock traveling valve of starting differential pressure as employing, adopts the traveling valve of annular valve or mechanical forced unlatching to reduce free gas to the impact of traveling valve unlatching; Adopting the gas prevention pump of gas-liquid displacement or adopting the oil well pump of two stage compression is that the oil gas that reduces in compression chamber recently improves pump efficiency.So above-mentioned gas prevention pump is all on common oil well pump basis, valve body or cavity to have been carried out some to improve, or increases the Novel gas-tight pump that unique construction forms.Above-mentioned improvement all has certain effect, can prevent preferably " gas lock ", improves pump efficiency.But difficulty of processing is large, and the life-span be difficult for to improve, and has increased operation easier when using.
In the high gas-liquid ratio oil well, gas is very serious on the impact of pump efficiency.These gases occupy the partial volume of pump chamber, can reduce the degree of filling in pump chamber, cause Yalve Balls of Sucker Rod Pumps to be opened and lag behind, and " gas lock " phenomenon even occurs.Also " hydraulic shock " can occur when " gas lock ", cause the vibration of rod pumping system, accelerate its damage.Result causes the frequent operation of pumping well, and pump detection period is shortened, and development cost increases.Therefore study that pump efficiency is high, the life-span long, operation and maintenance easily the Novel gas-tight pump have certain theory significance and use value, will create great economic benefit.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of two stage compression oil well pump is provided, and this two stage compression oil well pump is applicable to high oil-gas ratio oil well, and when down stroke, upper travelling valve closes that to be conducive to plunger descending, and the sucker rod stressing conditions is better; When oil-gas ratio was large, upper active chamber was more much smaller than lower active chamber; Be conducive to the higher thick oil well of gassiness.
Another object of the present invention is to provide a kind of oil pumping technique based on above-mentioned two stage compression oil well pump.
Purpose of the present invention is achieved through the following technical solutions: the two stage compression oil well pump mainly is made of be connected with each other logical upper pump barrel and lower pump barrel, the upper plug and the upper outlet valve that are arranged on upper pump barrel inside, the lower plunger that is arranged on lower pump barrel inside, lower outlet valve and oiling valve.
The upper pump barrel space of described upper plug outside consists of upper active chamber, and the lower pump barrel space of lower plunger outside consists of lower active chamber, is provided with middle outlet valve between described upper active chamber and lower active chamber.
Described middle outlet valve mainly is made of middle expulsion valve and middle traveling valve.
Described oiling valve mainly is made of suction valve and standing valve.
Described upper outlet valve mainly is made of upper expulsion valve and upper travelling valve.
Described lower outlet valve mainly is made of lower expulsion valve and lower travelling valve.
Described upper pump barrel and lower pump barrel all are arranged on the inside of oil pipe.
Oil pumping technique based on above-mentioned two stage compression oil well pump comprises the following steps:
(a) at first, the device that turns on the power, power plant drive upper plug, and then drive the lower plunger rising, thereby make the lower pump chamber below lower plunger, and volume increases, and pressure reduces;
(b) oiling valve descends under the effect of pressure reduction to open thereon, and crude oil enters lower active chamber;
(c) then, enter the oil gas of lower active chamber in the process of plunger undershoot, enter active chamber, complete first order compression;
(d) then, power plant drive upper plug and descend, and the oil gas in the upper active chamber of upper plug compression is completed second level compression.
Described power plant are motor.
Described upper plug and lower plunger move once up and down, and oil well pump has been completed once circulation, so goes round and begins again, and repeats circulation.
In sum, the invention has the beneficial effects as follows: be applicable to high oil-gas ratio oil well, and when down stroke, upper travelling valve closes that to be conducive to plunger descending, and the sucker rod stressing conditions is better; When oil-gas ratio was large, upper active chamber was more much smaller than lower active chamber; Be conducive to the higher thick oil well of gassiness.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The two stage compression oil well pump that the present invention relates to mainly is made of be connected with each other logical upper pump barrel 2 and lower pump barrel 7, the upper plug 1 and the upper outlet valve 3 that are arranged on upper pump barrel 2 inside, the lower plunger 6 that is arranged on lower pump barrel 7 inside, lower outlet valve 8 and oiling valve 10 as shown in Figure 1.
Described middle outlet valve 5 mainly is made of middle expulsion valve and middle traveling valve.
Described oiling valve 10 mainly is made of suction valve and standing valve.
Described upper outlet valve 3 mainly is made of upper expulsion valve and upper travelling valve.
Described lower outlet valve 8 mainly is made of lower expulsion valve and lower travelling valve.
Described upper pump barrel 2 and lower pump barrel 7 all are arranged on the inside of oil pipe 12.
Working principle of the present invention is: this pump has 2 road sealing pairs and 2 active chambers, and it is in series by elongated upper plug and larger-diameter lower plunger, in the lower plunger lower end, lower travelling valve is arranged, outlet valve and middle outlet valve on the upper plug lower end has.During down stroke, the oil gas of lower active chamber enters active chamber, completes first order compression; During upstroke, the oil gas of upper active chamber is again compressed, completes second level compression.
Oil pumping technique based on above-mentioned two stage compression oil well pump comprises the following steps:
(a) at first, the device that turns on the power, power plant drive upper plug, and then drive the lower plunger rising, thereby make the lower pump chamber below lower plunger, and volume increases, and pressure reduces;
(b) oiling valve descends under the effect of pressure reduction to open thereon, and crude oil enters lower active chamber;
(c) then, enter the oil gas of lower active chamber in the process of plunger undershoot, enter active chamber, complete first order compression;
(d) then, power plant drive upper plug and descend, and the oil gas in the upper active chamber of upper plug compression is completed second level compression.
Described power plant are motor.
Described upper plug and lower plunger move once up and down, and oil well pump has been completed once circulation, so goes round and begins again, and repeats circulation.
The above is only preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations that above embodiment is done are within all falling into protection scope of the present invention.
Claims (10)
1. two stage compression oil well pump, it is characterized in that, mainly consisted of by the upper pump barrel (2) that is connected with each other logical and lower pump barrel (7), the upper plug (1) and the upper outlet valve (3) that are arranged on upper pump barrel (2) inside, the lower plunger (6) that is arranged on lower pump barrel (7) inside, lower outlet valve (8) and oiling valve (10).
2. two stage compression oil well pump according to claim 1, it is characterized in that, the upper active chamber (4) of upper pump barrel (2) space formation that described upper plug (1) is outside, the lower active chamber (9) of lower pump barrel (7) space formation that lower plunger (6) is outside is provided with middle outlet valve (5) between described upper active chamber (4) and lower active chamber (9).
3. two stage compression oil well pump according to claim 2, is characterized in that, described middle outlet valve (5) mainly is made of middle expulsion valve and middle traveling valve.
4. two stage compression oil well pump according to claim 1, is characterized in that, described oiling valve (10) mainly is made of suction valve and standing valve.
5. two stage compression oil well pump according to claim 1, is characterized in that, described upper outlet valve (3) mainly is made of upper expulsion valve and upper travelling valve.
6. two stage compression oil well pump according to claim 1, is characterized in that, described lower outlet valve (8) mainly is made of lower expulsion valve and lower travelling valve.
7. two stage compression oil well pump according to claim 1, is characterized in that, described upper pump barrel (2) and lower pump barrel (7) all are arranged on the inside of oil pipe (12).
8. based on the oil pumping technique of above-mentioned two stage compression oil well pump, it is characterized in that, comprise the following steps:
(a) at first, the device that turns on the power, power plant drive upper plug, and then drive the lower plunger rising, thereby make the lower pump chamber below lower plunger, and volume increases, and pressure reduces;
(b) oiling valve descends under the effect of pressure reduction to open thereon, and crude oil enters lower active chamber;
(c) then, enter the oil gas of lower active chamber in the process of plunger undershoot, enter active chamber, complete first order compression;
(d) then, power plant drive upper plug and descend, and the oil gas in the upper active chamber of upper plug compression is completed second level compression.
9. oil pumping technique according to claim 8, is characterized in that, described power plant are motor.
10. oil pumping technique according to claim 8, is characterized in that, described upper plug and lower plunger move once up and down, and oil well pump has been completed once circulation, so goes round and begins again, and repeats circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110404978 CN103133339A (en) | 2011-11-28 | 2011-11-28 | Two-stage compression oil well pump and oil pump process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110404978 CN103133339A (en) | 2011-11-28 | 2011-11-28 | Two-stage compression oil well pump and oil pump process thereof |
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| CN103133339A true CN103133339A (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110404978 Pending CN103133339A (en) | 2011-11-28 | 2011-11-28 | Two-stage compression oil well pump and oil pump process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443366A (en) * | 2015-12-25 | 2016-03-30 | 东营市海天石油科技有限责任公司 | Difunctional oil pump |
| CN107023471A (en) * | 2016-01-31 | 2017-08-08 | 中国石油化工股份有限公司 | A kind of oil well pump and huge discharge lifting method with constant descending power in inclined shaft |
-
2011
- 2011-11-28 CN CN 201110404978 patent/CN103133339A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443366A (en) * | 2015-12-25 | 2016-03-30 | 东营市海天石油科技有限责任公司 | Difunctional oil pump |
| CN107023471A (en) * | 2016-01-31 | 2017-08-08 | 中国石油化工股份有限公司 | A kind of oil well pump and huge discharge lifting method with constant descending power in inclined shaft |
| CN107023471B (en) * | 2016-01-31 | 2018-07-13 | 中国石油化工股份有限公司 | A kind of oil well pump and huge discharge lifting method with constant downlink power in inclined shaft |
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Application publication date: 20130605 |