CN201650169U - Rod pumping well mouth back pressure reducing device - Google Patents
Rod pumping well mouth back pressure reducing device Download PDFInfo
- Publication number
- CN201650169U CN201650169U CN2010201097726U CN201020109772U CN201650169U CN 201650169 U CN201650169 U CN 201650169U CN 2010201097726 U CN2010201097726 U CN 2010201097726U CN 201020109772 U CN201020109772 U CN 201020109772U CN 201650169 U CN201650169 U CN 201650169U
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- CN
- China
- Prior art keywords
- plunger
- pressure chamber
- pressure
- low
- well mouth
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- Expired - Fee Related
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Abstract
The utility model discloses a rod pumping well mouth back pressure reducing device which is installed at an oil well mouth. A high-pressure chamber and a low-pressure chamber are fixedly connected to form a closed chamber. A plunger with two side surfaces unequal in areas is arranged in the closed chamber and is formed by a plunger disc and a hollow plunger barrel perpendicularly and fixedly connected with the plunger disc. The surface area of the plunger on the side close to the well mouth is large and the surface area of the plunger on the side far away from the well mouth is small. A spring is arranged in the high-pressure chamber. One end of the spring is fixed on the plunger disc and the other end thereof is fixed on the inner side wall of the high-pressure chamber. A plunger check valve is arranged at the end of the hollow plunger barrel, a high-pressure check valve is arranged at the outlet of the high-pressure chamber and a low-pressure check valve is arranged at the inlet of the low-pressure chamber. Since the plunger with two side surfaces unequal in areas is used to be matched with the spring and the check valves, the goal of increasing the pressure of liquid at the oil well mouth is reached, no additional power is required for increasing the pressure and no additional pipeline is laid for releasing power fluid; and since the modularized connection is adopted, the structure is simple.
Description
Technical field
The utility model relates to a kind of rod pumping system, relates in particular to the device of the reduction wellhead back pressure that is installed on well mouth of oil well, the production of can recovering the oil.
Background technology
The back pressure of well mouth of oil well makes the produced liquid in oil well body flow to metering room from well head, yet excessive back pressure not only influences the production capacity of oil well and the safety of sucker rod pumping equipment, and has improved the investment that ground flow is built.At present, mainly adopt two class methods to reach the purpose of falling back pressure, the one, reduce the viscosity of crude oil by methods such as heating, interpolation medicaments, thereby reduce the pressure loss in the defeated process of pipe; The 2nd, adopt electric centrifugal pump-engine driven supercharging methods such as jet pump system to replenish the energy loss of managing in the process of failing, the defective of these two kinds of methods is: all need to expend the expense in extra electric energy, heat energy and the increase production run.
Summary of the invention
Realize reducing the wellhead back pressure of sucker rod pumping well in order not expend extra energy, the utility model provides and need not to replenish just can the raise device of fluid pressure type reduction wellhead back pressure of well mouth of oil well fluid pressure of outside energy.
The technical solution adopted in the utility model is: high-pressure chamber and low-pressure chamber are fixedly connected to form an airtight cavity, the long-pending unequal plunger of a both side surface is set in described airtight cavity, plunger is formed by connecting by plunger disc and hollow plunger tube vertical fixing, lateral column plug surface area near well head is big, lateral column plug surface area away from well head is little, spring is set in the high-pressure chamber, and spring one end is fixed on the plunger disc, and the other end is fixed on the inner edge wall of high-pressure chamber; Hollow plunger tube end is provided with the plunger one way valve, and the exit of high-pressure chamber is provided with the high pressure one way valve, and the entrance of low-pressure chamber is provided with low pressure check valve.
The beneficial effects of the utility model are:
1, based on hydraulic principle, utilize area different plunger in both sides to cooperate the purpose that reaches rising well mouth of oil well fluid pressure with spring and one way valve, its boost energy comes from the fluid pressure of well mouth of oil well output, utilizes the oil-well self energy can realize pressurization.
2, need not to add additional power and carry out supercharging, need not laying and add pipeline release power fluid, leave the dosing hole, can mix thinner easily in case of necessity.
3, adopt the modularization connected mode, simple in structure, be convenient to the adjustment of maintaining and device parameter.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1. high-pressure chamber; 2. plunger one way valve; 3. spring; 4. plunger disc; 5. hollow plunger tube; 6. low-pressure chamber; 7. dosing mouth; 8. low pressure check valve; 9. high pressure one way valve.
The specific embodiment
Among Fig. 1, high-pressure chamber 1 fixedlys connected with low-pressure chamber 6 by screw thread, form an airtight cavity, nearly well side is a low-pressure chamber 6, well end far away is a high-pressure chamber 1, and the long-pending unequal plunger of a both side surface is set in this airtight cavity body, and plunger is formed by connecting by the screw thread vertical fixing by plunger disc 4 and hollow plunger tube 5, lateral column plug surface area near well head is big, and is little away from a lateral column plug surface area of well head.Wherein, the left-end point of hollow plunger tube 5 is equipped with plunger one way valve 2, in the outlet of high-pressure chamber 1 high pressure one way valve 9 is installed, and in the entrance of low-pressure chamber 6 low pressure check valve 8 is installed.
Four springs 3 are installed in high-pressure chamber 1, and an end of spring 3 is fixed on the plunger disc 4, and the other end is fixed on the inner edge wall of high-pressure chamber 1.Be communicated with a dosing mouth 7 at the limit of low-pressure chamber 6 wall, be used for adding thinner, also can replace dosing mouth 7 with plug to fluid.
High-pressure chamber's 1 left end outlet links to each other with the surface gathering and transferring pipeline by concentric reducer, and low-pressure chamber's 6 right-hand members inlet links to each other with the oil well oil conduit outlet.
The utility model is when rod pumping system tubing pressure pressurized operation, under the effect of oil pipe outlet pressure, low pressure check valve 8 is open, fluid enters in the low-pressure chamber 6, plunger disc 4 and hollow plunger tube 5 have overcome behind the elastic force of spring 3 to high-pressure chamber's 1 motion, high-pressure chamber 1 supercharging thus, and plunger one way valve 2 pressurized under differential pressure action is closed, fluid in the plunger compression high-pressure chamber 1 enters gathering line after overcoming back pressure.Plunger is when low-pressure chamber's 6 motions, and high-pressure chamber 1 is the feed liquor process, and after the oil pipe outlet pressure descended, low-pressure chamber's 6 pressure reduced, and low pressure check valve 8 is closed, and under the elastic force of spring 3, plunger is to low-pressure chamber's 6 motions, and the pressure of low-pressure chamber 6 raises.When high-pressure chamber's 1 pressure during less than gathering line pressure, high pressure one way valve 9 is closed.The volume of low-pressure chamber 6 reduces, and when pressure increases to when being higher than high-pressure chamber's 1 pressure, plunger one way valve 2 is opened, and the fluids in the low-pressure chamber 6 enter high-pressure chamber 1.When the oil pipe outlet pressure raises next time, repeat said process.
In the utility model operation process, power fluid is the oil-well self production fluid, and the pressure differential that plunger caused that is not waited by the both sides area realizes the purpose of supercharging, need not to replenish outside energy and can reduce the well mouth of oil well back pressure.
Claims (2)
1. back pressure device falls in a sucker rod pumping well well head, high-pressure chamber (1) and low-pressure chamber (6) are fixedly connected to form an airtight cavity, it is characterized in that: the long-pending unequal plunger of a both side surface is set in described airtight cavity, plunger is formed by connecting by plunger disc (4) and hollow plunger tube (5) vertical fixing, lateral column plug surface area near well head is big, lateral column plug surface area away from well head is little, spring (3) is set in the high-pressure chamber (1), one end of spring (3) is fixed on the plunger disc (4), and the other end is fixed on the inner edge wall of high-pressure chamber (1); Hollow plunger tube (5) end is provided with plunger one way valve (2), and the exit of high-pressure chamber (1) is provided with high pressure one way valve (9), and the entrance of low-pressure chamber (6) is provided with low pressure check valve (8).
2. back pressure device falls in sucker rod pumping well well head according to claim 1, it is characterized in that: be communicated with a dosing mouth (7) on the limit wall of low-pressure chamber (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201097726U CN201650169U (en) | 2010-02-05 | 2010-02-05 | Rod pumping well mouth back pressure reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201097726U CN201650169U (en) | 2010-02-05 | 2010-02-05 | Rod pumping well mouth back pressure reducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201650169U true CN201650169U (en) | 2010-11-24 |
Family
ID=43115401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201097726U Expired - Fee Related CN201650169U (en) | 2010-02-05 | 2010-02-05 | Rod pumping well mouth back pressure reducing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201650169U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298453A (en) * | 2015-10-12 | 2016-02-03 | 中国石油天然气股份有限公司 | Hydraulic automatic return pressure reducing device |
| CN111794716A (en) * | 2020-07-10 | 2020-10-20 | 张郭祎 | Underground associated gas pressure buffering device and method |
-
2010
- 2010-02-05 CN CN2010201097726U patent/CN201650169U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298453A (en) * | 2015-10-12 | 2016-02-03 | 中国石油天然气股份有限公司 | Hydraulic automatic return pressure reducing device |
| CN111794716A (en) * | 2020-07-10 | 2020-10-20 | 张郭祎 | Underground associated gas pressure buffering device and method |
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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: 20101124 Termination date: 20130205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |