CN103133326A - Oil well pump gap leakage test method - Google Patents
Oil well pump gap leakage test method Download PDFInfo
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- CN103133326A CN103133326A CN 201110404660 CN201110404660A CN103133326A CN 103133326 A CN103133326 A CN 103133326A CN 201110404660 CN201110404660 CN 201110404660 CN 201110404660 A CN201110404660 A CN 201110404660A CN 103133326 A CN103133326 A CN 103133326A
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Abstract
The invention discloses an oil well pump gap leakage test method which is mainly composed of pressure test joints (2), a lower-pressure charging pump system (3) and a high-pressure charging pump system (4), wherein the pressure test joints (2) are connected with an oil well pump (1), and the lower-pressure charging pump system (3) and the high-pressure charging pump system (4) are respectively communicated with the inside of the oil well pump (1) through the pressure test joints (2). The oil well pump gap leakage test method can test whether seal performance and pressure bearing strength of various cone pipe thread seal surfaces, various section seal surfaces, oil inlet valve seal surfaces and various pressure bearing parts of the oil well pump under underground liquid column pressure is reliable.
Description
Technical field
The present invention relates to a kind of oil well pump gap leaking loss amount testing apparatus.
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; Be applicable to the gas prevention pumps such as the oil well pump gap leaking loss amount testing apparatus of high oil-gas ratio and oil well pump gap leaking loss amount testing apparatus; 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.
After oil well pump is produced, need to test pressing sealability and the bearing strength of part under the underground liquid column pressure in its each taper pipe thread sealing surface, each section sealing surface, oiling valve sealing surface and each pressurized of oil well pump, thereby provide Data support for its use.
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 well pump gap leaking loss amount testing apparatus is provided, and this oil well pump gap leaking loss amount testing apparatus can verify in each taper pipe thread sealing surface of oil well pump, each section sealing surface, oiling valve sealing surface and each pressurized of oil well pump, whether sealability and the bearing strength of pressure part under the underground liquid column pressure be reliable.
Purpose of the present invention is achieved through the following technical solutions: oil well pump gap leaking loss amount testing apparatus mainly is made of the action pressure-testing joint that is connected with oil well pump and the low pressure charging pump system and the high-pressure liquid-filling pumping system that are connected with oil well pump inside respectively by action pressure-testing joint.
Be provided with the voltage stabilizing bag between described low pressure charging pump system and high-pressure liquid-filling pumping system and action pressure-testing joint.
Described low pressure charging pump system mainly is made of the low pressure charging pump that is connected with action pressure-testing joint, and described low pressure charging pump is connected with low pressure gauge.
Described high-pressure liquid-filling pumping system mainly is made of the high-pressure liquid-filling pump that is connected with action pressure-testing joint, and described high-pressure liquid-filling pump is connected with high-pressure manometer.
In sum, the invention has the beneficial effects as follows: can verify in each taper pipe thread sealing surface of oil well pump, each section sealing surface, oiling valve sealing surface and each pressurized of oil well pump, whether sealability and the bearing strength of pressure part under the underground liquid column pressure be reliable.
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 oil well pump gap leaking loss amount testing apparatus that the present invention relates to mainly is made of the action pressure-testing joint 2 that is connected with oil well pump 1 and the low pressure charging pump system 3 and the high-pressure liquid-filling pumping system 4 that are connected with oil well pump 1 inside respectively by action pressure-testing joint 2 as shown in Figure 1.
Be provided with voltage stabilizing bag 5 between described low pressure charging pump system 3 and high-pressure liquid-filling pumping system 4 and action pressure-testing joint 2.
Described low pressure charging pump system 3 mainly is made of the low pressure charging pump 6 that is connected with action pressure-testing joint 2, and described low pressure charging pump 6 is connected with low pressure gauge 7.
Described high-pressure liquid-filling pumping system 4 mainly is made of the high-pressure liquid-filling pump 8 that is connected with action pressure-testing joint 2, and described high-pressure liquid-filling pump 8 is connected with high-pressure manometer 9.
Experimentation of the present invention is:
The oil well pump that (1) will always install (not filling plunger) lies on support;
(2) tighten action pressure-testing joint on the pump barrel box cupling;
(3) with device for absorbing ball, oiling valve is held and it is sitting on the sealing surface of oil-feed valve seat;
(4) open the low pressure charging pump, No. 10 Diesel oils (GB252-87) are full of pump barrel.Unclamp device for absorbing ball, the oil-feed valve ball under pressure, firm is sealed on the oil-feed valve seat;
(5) close the low pressure charging pump, open the high-potting pump, continue to inject No. 10 Diesel oils in pump, pay close attention to simultaneously gauge hand rising situation;
(6) close the high-potting pump after gauge hand rises to the test pressure of regulation, examine the gauge hand situation of change.If voltage stabilizing 3 minutes, Pressure Drop 0.5MPa, this of this pump test is qualified;
(7) if Pressure Drop surpasses above specified value, will go to find leakage from pump and each sealing surface, then release, drain the oil, leakage is taken apart, carefully check quality of processing and total packing quality of each sealing surface of sealing place.After getting rid of relevant quality problems, again repeat again test after general assembly or redesign structure, until qualified;
(8) break and excessive deformation as finding that the relevant pressurized part of oil well pump has, again carry out strength check to these parts, redesign relevant part.
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 (4)
1. oil well pump gap leaking loss amount testing apparatus, it is characterized in that, mainly consist of by the action pressure-testing joint (2) that is connected with oil well pump (1) and by low pressure charging pump system (3) and high-pressure liquid-filling pumping system (4) that action pressure-testing joint (2) is connected with oil well pump (1) inside respectively.
2. oil well pump gap leaking loss amount testing apparatus according to claim 1, is characterized in that, is provided with voltage stabilizing bag (5) between described low pressure charging pump system (3) and high-pressure liquid-filling pumping system (4) and action pressure-testing joint (2).
3. oil well pump gap leaking loss amount testing apparatus according to claim 1, it is characterized in that, described low pressure charging pump system (3) mainly is made of the low pressure charging pump (6) that is connected with action pressure-testing joint (2), and described low pressure charging pump (6) is connected with low pressure gauge (7).
4. oil well pump gap leaking loss amount testing apparatus according to claim 1, it is characterized in that, described high-pressure liquid-filling pumping system (4) mainly is made of the high-pressure liquid-filling pump (8) that is connected with action pressure-testing joint (2), and described high-pressure liquid-filling pump (8) is connected with high-pressure manometer (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110404660 CN103133326A (en) | 2011-11-28 | 2011-11-28 | Oil well pump gap leakage test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110404660 CN103133326A (en) | 2011-11-28 | 2011-11-28 | Oil well pump gap leakage test method |
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| CN103133326A true CN103133326A (en) | 2013-06-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573605A (en) * | 2013-11-06 | 2014-02-12 | 中国第一汽车股份有限公司 | Bench test control system for engine double-acting hydraulic pump |
| CN104792475A (en) * | 2015-05-07 | 2015-07-22 | 青岛中瑞泰软控技术有限公司 | Oil pump tightness performance test and leakage loss detection system and test device |
| CN112431752A (en) * | 2020-11-30 | 2021-03-02 | 华中科技大学 | High-pressure large-scale clearance dynamic sealing performance testing device and system |
-
2011
- 2011-11-28 CN CN 201110404660 patent/CN103133326A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573605A (en) * | 2013-11-06 | 2014-02-12 | 中国第一汽车股份有限公司 | Bench test control system for engine double-acting hydraulic pump |
| CN103573605B (en) * | 2013-11-06 | 2016-03-16 | 中国第一汽车股份有限公司 | A kind of motor double-action hydraulic pump bench test control system |
| CN104792475A (en) * | 2015-05-07 | 2015-07-22 | 青岛中瑞泰软控技术有限公司 | Oil pump tightness performance test and leakage loss detection system and test device |
| CN112431752A (en) * | 2020-11-30 | 2021-03-02 | 华中科技大学 | High-pressure large-scale clearance dynamic sealing performance testing device and system |
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Application publication date: 20130605 |