CN203867862U - Liquid-storage-type emptying-preventing oil well pump - Google Patents
Liquid-storage-type emptying-preventing oil well pump Download PDFInfo
- Publication number
- CN203867862U CN203867862U CN201420273280.9U CN201420273280U CN203867862U CN 203867862 U CN203867862 U CN 203867862U CN 201420273280 U CN201420273280 U CN 201420273280U CN 203867862 U CN203867862 U CN 203867862U
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- liquid
- pump
- pump barrel
- liquid storage
- oil well
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Abstract
A liquid-storage-type emptying-preventing oil well pump comprises a plunger assembly, a liquid storage cavity, a pump barrel, a fixed valve assembly and kerfs. The liquid-storage-type emptying-preventing oil well pump is characterized in that the outer periphery of the middle of the pump barrel is provided with the annular liquid storage cavity, the rapid liquid-discharging kerfs are axially and evenly formed in the inner periphery of the position, sleeved with the liquid storage cavity, of the pump barrel, and the length of each kerf is smaller than that of the plunger assembly. After the oil well pump is in an emptying state, when a plunger arrives below the liquid storage cavity every stroke, the liquid storage cavity is filled with liquid under oil pipe liquid column pressure. When the plunger arrives above the liquid storage cavity every stroke, the liquid contained in the liquid storage cavity flows into the pump barrel under the action of gravity. After accumulation in a plurality of strokes, clearance space will be filled with the liquid. When a piston descends, because the liquid cannot be compressed, pressure in the pump barrel is suddenly increased, space for containing gas does not exist in the pump barrel any more, the gas is forced to be exhausted out of the pump barrel through a movable valve, and a gas lock is opened. The liquid-storage-type emptying-preventing oil well pump is simple and reliable in structure, low in cost and suitable for oil wells where pump emptying occurs easily due to insufficient liquid supply.
Description
Technical field
The present invention relates to a kind of oil well plunger oil well pump, specifically the anti-oil well pump of finding time of a kind of water storage type.
Background technique
The common problem oil reservoir feed flow that LOW PERMEABILITY RESERVOIR exploitation exists is not enough, deep-well plunger pump is the down-hole pumping equipment that mechanical oil recovery oil well extensively adopts, and for the oil well of fluid supply capacity wretched insufficiency, is difficult to formulate rational production system, if can not adjust in time process data, there will be vaccuum phenomenon.Free gas in suction pump chamber occupies the whole space of pump barrel, and because gas is compressible, gas Repeated Compression in pump barrel expands, even gas compression is arrived to minimum volume, traveling valve can not be opened, and oil well pump is flogged a dead horse.Having a strong impact on oil well management work, especially in winter, gathering line meeting frozen block, makes troubles to production management in winter.
For addressing this problem, scientific research personnel has taked some technical measures: a kind of is to force traveling valve to be opened with mechanical means, but its structure is more complicated, is subject to the impact of sand, wax, dirt, and reliability is not high, is difficult to apply.Another kind is to carry out exhaust by the mode of grate flow channel, existing problems are: during suction port air inlet, relief opening is closed by plunger, when Exhaust Open, suction port is closed by plunger again, gas in grate flow channel is difficult to discharge under the effect of the nearly two km fluid columns in oil well pump top, when plunger is up, gas in grate flow channel, along plunger periphery, flow to pump suction chamber low pressure area (oil well pump is poor to the sealing of gas) again, when plunger is up while opening suction port, gas in grate flow channel is got back to again pump suction chamber, this exhaust mode is also difficult to solve the problem that oil well pump sky is taken out.
Summary of the invention
The purpose of this utility model is to provide the anti-oil well pump of finding time of a kind of water storage type, overcomes the defect that above prior art exists.
The technological scheme that the utility model addresses the above problem is that the pump barrel inner edge of overlapping at liquid storage cylinder is axially evenly provided with slot at an annular liquid storage cylinder of the middle part of pump barrel periphery design, and liquid storage cylinder is communicated with pump barrel by slot.When if oil well pump generation vaccuum phenomenon makes the interior gassy of pump barrel, when plunger goes downwards to the below of liquid storage cylinder, liquid storage cylinder communicates with oil pipe, make liquid storage cylinder fill liquid, when plunger goes upward to liquid storage cylinder top, liquid storage cylinder communicates with pump barrel, liquid backflow is in pump barrel, accumulation through some strokes, in pump barrel, liquid volume constantly increases, until the descending extruding liquid of plunger plunger when descending, because liquid is incompressible, pump barrel pressure rise is opened the traveling valve of plunger, gas is in traveling valve is discharged to the tubing string on pump, prevented the find time formation of fault of oil well pump.
The utility model comprises plunger piston assembly, liquid storage cylinder, pump barrel, standing valve assembly and slot, it is characterized in that: at an annular liquid storage cylinder of the middle and lower part of pump barrel periphery design, the pump barrel inner edge of overlapping at liquid storage cylinder is axially evenly provided with quick fluid-discharge slot.The longitudinal length of liquid storage cylinder and slot is all shorter than plunger piston assembly length.Plunger respectively when upper lower dead centre slot can expose completely.
Compared with the prior art the utility model has the following advantages:
1, compared with the prior art, working principle has essential difference, and prior art is to force traveling valve open exhaust or utilize the exhaust of auxiliary exhaust road, the utility model working principle is to utilize liquid storage cylinder to fill with liquid to pump barrel, force travelling valve to be opened, gas is discharged, thereby get rid of fast gas lock fault.It eliminates oil well pump vaccuum phenomenon in time, when normal production, does not affect again pump efficiency, has saved oil well management cost.
2, simple and reliable for structure, cost is low, be widely used in because of the not enough oil well that easily generating pump is found time of feed flow.
accompanying drawing explanation
Fig. 1-structural representation of the present utility model.
1-plunger piston assembly 2-annular liquid storage cylinder 3-slot 4-pump barrel 5-standing valve assembly in figure.
Embodiment
For further disclosing the technical solution of the utility model, below in conjunction with Figure of description, by embodiment, elaborate:
The utility model comprises plunger piston assembly 1, annular liquid storage cylinder 2, pump barrel 4, standing valve assembly 5 and slot 3, it is characterized in that: at an annular liquid storage cylinder of the middle and lower part of pump barrel periphery design, the pump barrel inner edge of overlapping at liquid storage cylinder is axially evenly provided with quick fluid-discharge slot.The longitudinal length of liquid storage cylinder and slot is all shorter than plungers length.Plunger respectively when upper lower dead centre slot can expose completely.If during the interior gassy generation vaccuum phenomenon of oil pump sleeve, the capable below to liquid storage cylinder of plunger down stroke, liquid storage cylinder communicates with oil pipe by slot, makes liquid storage cylinder fill liquid.Again when plunger up stroke is to liquid storage cylinder when top, liquid storage cylinder communicates with pump barrel by slot, the liquid backflow storing is in pump barrel, through the accumulation of some strokes, in pump barrel, liquid volume constantly increases, until the descending extruding liquid of plunger plunger when descending, because liquid is incompressible, pump barrel pressure rise is opened the traveling valve of plunger, and gas, in traveling valve is discharged to the tubing string on pump, has been avoided the formation of gas lock.
The utility model has reduced well workover number of times, has saved well maintenance cost.Simple and reliable for structure, cost is low, be widely used in because of the not enough oil well that easily generating pump is found time of feed flow.
Claims (1)
1. a water storage type prevents finding time oil well pump, comprise plunger piston assembly, liquid storage cylinder, pump barrel, standing valve assembly and slot, it is characterized in that: at an annular liquid storage cylinder of the middle and lower part of pump barrel periphery design, the pump barrel inner edge of overlapping at annular liquid storage cylinder is axially evenly provided with quick fluid-discharge slot, the length that is shorter in length than piston assembly of slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420273280.9U CN203867862U (en) | 2014-05-27 | 2014-05-27 | Liquid-storage-type emptying-preventing oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420273280.9U CN203867862U (en) | 2014-05-27 | 2014-05-27 | Liquid-storage-type emptying-preventing oil well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203867862U true CN203867862U (en) | 2014-10-08 |
Family
ID=51648823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420273280.9U Expired - Fee Related CN203867862U (en) | 2014-05-27 | 2014-05-27 | Liquid-storage-type emptying-preventing oil well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203867862U (en) |
-
2014
- 2014-05-27 CN CN201420273280.9U patent/CN203867862U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20150527 |
|
| EXPY | Termination of patent right or utility model |