CN103133303A - Oil pumping technique based on middle venting gas-prevention oil well pump - Google Patents
Oil pumping technique based on middle venting gas-prevention oil well pump Download PDFInfo
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- CN103133303A CN103133303A CN 201110404687 CN201110404687A CN103133303A CN 103133303 A CN103133303 A CN 103133303A CN 201110404687 CN201110404687 CN 201110404687 CN 201110404687 A CN201110404687 A CN 201110404687A CN 103133303 A CN103133303 A CN 103133303A
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Abstract
The invention discloses an oil pumping technique based on a middle venting gas-prevention oil well pump. The technique includes: (a) a power device is started to drive a plunger to move upward; (b) a fixed valve is opened and an upper traveling valve and a lower traveling valve are closed; (c) oil in a sleeve enters a pump cylinder from a venting hole under the action of the sinking pressure; and (d) the power device drives the plunger to move downward, the venting hole of the pump cylinder is sealed by the surface of the plunger, the traveling valves are opened, and oil in the lower portion of the pump cylinder is discharged to an oil pipe through an inner hole of the plunger. The technique improves the oil inlet conditions, and promotes fullness of a cavity of the pump cylinder below a venting groove of the pump cylinder. Therefore, compared with a conventional pump, the pump can effectively promote the pump efficiency. The oil pipe and the sleeve are communicated mutually through the venting groove in the middle of the pump cylinder. A second-time venting groove is formed in the pump cylinder, the effect that an oil drain device is not installed in the well can be achieved, and oil well maintenance cost and environmental pollution are reduced. Due to the fact that the venting grooves are formed in the pump cylinder, a pressure test can not be carried out on the whole pipe column after well completion.
Description
Technical field
The present invention relates to a kind of oil pumping technique based on middle exhaust airlock-resistant oil pump.
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 middle exhaust airlock-resistant oil 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 oil pumping technique based on middle exhaust airlock-resistant oil pump is provided, should be long based on the oil pumping technique of middle exhaust airlock-resistant oil pump plunger used, the air vent at pump barrel middle part, improved the oil-feed situation, improved the degree of filling of pump barrel air vent bottom pump barrel chamber, so compare with conventional pumps, this pump can improve pump efficiency effectively; Oil pipe and sleeve pipe are interconnected by the air vent at pump barrel middle part, so as long as plunger is proposed pump barrel, but with regard to the immobile oil tubing string, thick oil well is carried out steam soak; Have the secondary exhaust groove on pump barrel, so the down-hole can not fill oil drainer, reduce oil well workover cost and environmental pollution; Because pump barrel has air vent, so after completion, whole tubing string can't pressure testing.
Purpose of the present invention is achieved through the following technical solutions: the oil pumping technique based on middle exhaust airlock-resistant oil pump comprises the following steps:
(a) at first, the device that turns on the power, power plant drive plunger connecting rod, and then the drive plunger moves upward;
(b) lower pump barrel chamber pressure reduces, and standing valve is opened, and the upper and lower valve that moves about cuts out;
(c) when the plunger lower end is up when surpassing the exhaust port at upper pump barrel middle part, the fluid in sleeve pipe enters pump barrel from exhaust port under the pump intake pressure effect, and the space that on the one hand air vent bottom pump barrel is not full of replenishes; On the other hand the gas in pump barrel air vent bottom pump letter space is discharged, thereby realize the degassing function of this pump;
(d) power plant drive plunger connecting rod, and then drive plunger and move downward, and plunger surface is with the exhaust port sealing of pump barrel, and the pump internal pressure raises, and traveling valve is opened, and pump barrel bottom fluid is discharged to oil pipe from the plunger endoporus.
Described power plant are motor.
Described plunger moves once up and down, and oil well pump has been completed once circulation, so goes round and begins again, and repeats circulation.
The middle exhaust airlock-resistant oil pump that the present invention is used, mainly consisted of with lower pump barrel, the plunger that is arranged on upper pump barrel inside, the plunger connecting rod that is connected with plunger by the logical upper pump barrel that is connected with each other, described upper pump barrel and lower pump barrel are cascaded by connecting cylinder, and are provided with at least one exhaust port on the sidewall of connecting cylinder.
The number of described exhaust port is two, and is symmetricly set on the sidewall of connecting cylinder.
Be provided with the pump upper connection on the end port of described upper pump barrel away from lower pump barrel.
Be provided with the standing valve assembly on the end port of described lower pump barrel away from upper pump barrel.
In sum, the invention has the beneficial effects as follows: plunger used is long, the air vent at pump barrel middle part has improved the oil-feed situation, has improved the degree of filling of pump barrel air vent bottom pump barrel chamber, so compare with conventional pumps, this pump can improve pump efficiency effectively; Oil pipe and sleeve pipe are interconnected by the air vent at pump barrel middle part, so as long as plunger is proposed pump barrel, but with regard to the immobile oil tubing string, thick oil well is carried out steam soak; Have the secondary exhaust groove on pump barrel, so the down-hole can not fill oil drainer, reduce oil well workover cost and environmental pollution; Because pump barrel has air vent, so after completion, whole tubing string can't pressure testing.
Description of drawings
Fig. 1 is the structural representation of device therefor 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 oil pumping technique based on middle exhaust airlock-resistant oil pump that the present invention relates to comprises the following steps:
(a) at first, the device that turns on the power, power plant drive plunger connecting rod 1, and then drive plunger 4 moves upward;
(b) lower pump barrel 5 chamber pressures reduce, and standing valve is opened, and the upper and lower valve that moves about cuts out;
(c) when plunger 4 lower ends are up when surpassing the exhaust port 8 at upper pump barrel 3 middle parts, the fluid in sleeve pipe enters pump barrel from exhaust port 8 under the pump intake pressure effect, and the space that on the one hand air vent bottom pump barrel is not full of replenishes; On the other hand the gas in pump barrel air vent bottom pump letter space is discharged, thereby realize the degassing function of this pump;
(d) power plant drive plunger connecting rod 1, and then drive plunger 4 and move downward, and plunger 4 surfaces are with the exhaust port sealing of pump barrel, and the pump internal pressure raises, and traveling valve is opened, and pump barrel bottom fluid is discharged to oil pipe from the plunger endoporus.
Described power plant are motor.
Described plunger moves once up and down, and oil well pump has been completed once circulation, so goes round and begins again, and repeats circulation.
The present invention's middle exhaust airlock-resistant oil pump used as shown in Figure 1, mainly consisted of with lower pump barrel 5, the plunger 4 that is arranged on upper pump barrel 2 inside, the plunger connecting rod 1 that is connected with plunger 4 by the logical upper pump barrel 3 that is connected with each other, described upper pump barrel 3 and lower pump barrel 5 are cascaded by connecting cylinder 7, and are provided with at least one exhaust port 8 on the sidewall of connecting cylinder 7.
The number of described exhaust port 8 is two, and is symmetricly set on the sidewall of connecting cylinder 7.
Be provided with pump upper connection 2 on the end port of described upper pump barrel 3 away from lower pump barrel 5.
Be provided with standing valve assembly 6 on the end port of described lower pump barrel 5 away from upper pump barrel 3.
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 (3)
1. based on the oil pumping technique of middle exhaust airlock-resistant oil pump, it is characterized in that, comprise the following steps:
(a) at first, the device that turns on the power, power plant drive plunger connecting rod (1), and then drive plunger (4) moves upward;
(b) lower pump barrel (5) chamber pressure reduces, and standing valve is opened, and the upper and lower valve that moves about cuts out;
(c) when plunger (4) lower end is up when surpassing the exhaust port (8) at upper pump barrel (3) middle part, fluid in sleeve pipe is under the pump intake pressure effect, enter pump barrel from exhaust port (8), the space that on the one hand air vent bottom pump barrel is not full of replenishes; On the other hand the gas in pump barrel air vent bottom pump letter space is discharged, thereby realize the degassing function of this pump;
(d) power plant drive plunger connecting rod (1), and then drive plunger (4) and move downward, and plunger (4) surface is with the exhaust port sealing of pump barrel, and the pump internal pressure raises, and traveling valve is opened, and pump barrel bottom fluid is discharged to oil pipe from the plunger endoporus.
2. the oil pumping technique based on middle exhaust airlock-resistant oil pump according to claim 1, is characterized in that, described power plant are motor.
3. the oil pumping technique based on middle exhaust airlock-resistant oil pump according to claim 1, is characterized in that, described plunger moves 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 201110404687 CN103133303A (en) | 2011-11-28 | 2011-11-28 | Oil pumping technique based on middle venting gas-prevention oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110404687 CN103133303A (en) | 2011-11-28 | 2011-11-28 | Oil pumping technique based on middle venting gas-prevention oil well pump |
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| CN103133303A true CN103133303A (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110404687 Pending CN103133303A (en) | 2011-11-28 | 2011-11-28 | Oil pumping technique based on middle venting gas-prevention oil well pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533480A (en) * | 2018-02-05 | 2018-09-14 | 东北石油大学 | Casing gas auxiliary lifting off-load pumps |
| CN115370560A (en) * | 2022-10-25 | 2022-11-22 | 山东高原油气装备有限公司 | Oil-well pump with exhaust function for oil field |
-
2011
- 2011-11-28 CN CN 201110404687 patent/CN103133303A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533480A (en) * | 2018-02-05 | 2018-09-14 | 东北石油大学 | Casing gas auxiliary lifting off-load pumps |
| CN115370560A (en) * | 2022-10-25 | 2022-11-22 | 山东高原油气装备有限公司 | Oil-well pump with exhaust function for oil field |
| CN115370560B (en) * | 2022-10-25 | 2023-01-24 | 山东高原油气装备有限公司 | Oil-well pump with exhaust function for oil field |
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Application publication date: 20130605 |