CN2773302Y - Pressure back and reducing device for oil-pumping well mouth - Google Patents
Pressure back and reducing device for oil-pumping well mouth Download PDFInfo
- Publication number
- CN2773302Y CN2773302Y CN 200520030210 CN200520030210U CN2773302Y CN 2773302 Y CN2773302 Y CN 2773302Y CN 200520030210 CN200520030210 CN 200520030210 CN 200520030210 U CN200520030210 U CN 200520030210U CN 2773302 Y CN2773302 Y CN 2773302Y
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- CN
- China
- Prior art keywords
- well head
- oil
- hydraulic cylinder
- communicated
- oil pumper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model belongs to the technical field of oil exploitation, which relates to a well head pressure returning and reducing device of an oil pumping unit. The utility model is characterized in that a sealing pressure reducing assembly, a hydraulic cylinder and a one-way valve are adopted, wherein the inner cavity of the sealing pressure reducing assembly is communicated with an outlet of the hydraulic cylinder, and a center tube of the assembly is communicated with the input end of the one-way valve; a pressure spring and a piston are sheathed on the center tube. According to a negative pressure generating principle, when the well head pressure returning and reducing device of an oil pumping unit is used, the assembly is communicated with an oil conveying port of a well head, and the one-way valve is communicated with an oil conveying tube; the piston rod of the hydraulic cylinder is connected with a walking beam of the oil pumping unit, and a cylinder sleeve is connected with a bracket of the oil pumping unit. Therefore, the defects existing in the present well head pressure returning and reducing technology are overcome well. The utility model has the advantages of simple structure, convenient installation, no adverse effect on the oil conveying system, obviously low back pressure of well head, etc.
Description
Technical field:
The utility model belongs to technical field of petroleum extraction, relates to a kind of oil pumper well head back pressure decompressor.
Background technology:
Because the existing crude oil back pressure of oil pumper well head, its height not only has influence on the degree of filling of oil well pump, but also has increased the weight of the load of oil pumper, causes pump efficiency to reduce, and power consumption increases.Reducing oil pumper well head back pressure is the technical problem of tackling key problems always and solve in each oil field.Traditional method is taked in well head emptying step-down, though the fine solution well head of energy because crude oil effluxes, causes environment pollution and potential safety hazard to the pressure of metering room; Have the oil recovery flow process is changed is bigger, attaches again and has produced new technical problem; What have but can only reduce the part back pressure, and the step-down amplitude is little, the pressure between can't reducing from the well head to the metering room.In a word, existing oil pumper well head back pressure step-down technology all has limitation, and it is little to exist the decompression amplitude, can not satisfy the demand, and complex structure is changed greatly fuel transfer system, and the installation cost height has big defective such as environmental protection and production safety aspect hidden danger.
The utility model content:
The purpose of this utility model is to provide a kind of distinguished oil pumper well head back pressure dropping equipment that can better overcome the prior art defective.
Technical solution adopted in the utility model is a kind of oil pumper well head back pressure decompressor of design, and its structure comprises: sealing decompression assembly, hydraulic cylinder, one way valve.
Wherein, the inner chamber of sealing decompression assembly is communicated with the outlet of hydraulic cylinder by conduit, and the central tube of sealing decompression assembly is communicated with the one way valve input.During use, the inner chamber of sealing decompression assembly is communicated with the threeway oil transportation mouth of oil pumper well head, the one way valve delivery outlet is communicated with petroleum pipeline, the piston rod and the oil pumper walking beam of hydraulic cylinder are flexibly connected, the cylinder sleeve of hydraulic cylinder and oil pumper support flexibly connect, and constitute oil pumper well head back pressure decompressor of the present utility model.
This oil pumper well head back pressure decompressor of the present utility model, according to the negative pressure occurring principle, owing to adopt technique scheme, overcome the existing defective of existing oil pumper well head back pressure step-down technology preferably, have simple in structurely, easy for installation, need not fuel transfer system is done big change, fuel transfer system is not produced any adverse effect, significantly reduce advantages such as wellhead back pressure.
Description of drawings:
Fig. 1 represents the utility model oil pumper well head back pressure decompressor structural representation.
The specific embodiment:
In conjunction with the accompanying drawings and embodiments, further specify the concrete structure of the utility model oil pumper well head back pressure decompressor, its feature and advantage will be clearer.
Referring to Fig. 1, the embodiment of the utility model oil pumper well head back pressure decompressor, its structure comprises: sealing decompression assembly 1, one way valve 2, hydraulic cylinder 3. wherein seals decompression assembly 1 and comprises cylinder sleeve 1.3, front pressuring plate 1.1, rear fender 1.5, central tube 1.6, piston 1.4, compression spring 1.2; Piston 1.4 and compression spring 1.2 are set on the cylinder sleeve 1.3 lumen centers pipes 1.6, and front pressuring plate 1.1 is threaded with the employing of cylinder sleeve 1.3 front sides, and front pressuring plate 1.1 is provided with tube connector, adopt between rear fender 1.5 and cylinder sleeve 1.3 rear sides and the central tube 1.6 to be threaded; Hydraulic cylinder 3 adopts existing hydraulic cylinder 3.1, in order to reduce the pollution of field work place to hydraulic cylinder, at the upper cover of piston rod of hydraulic cylinder 3.1 dust hood 3.2 of setting up defences; One way valve 2 adopts existing one way valve 2.1.The outlet of hydraulic cylinder 3.1 is communicated with cylinder sleeve 1.3 inner chambers by the rear fender 1.5 that conduit 3.3 passes sealing decompression assembly, the input port of one way valve 2.1 is communicated with by central tube 1.6 external parts of flange with sealing decompression assembly, constitutes a kind of oil pumper well head back pressure decompressor of the present utility model.
When installing and using, the inner chamber of sealing decompression assembly is communicated with the threeway oil transportation mouth of oil pumper well head by tube connector (passing front pressuring plate), the one way valve delivery outlet is communicated with petroleum pipeline, the piston rod and the oil pumper walking beam of hydraulic cylinder are flexibly connected by hinge, with the cylinder sleeve and the flexible connection of oil pumper bracket by hinges of hydraulic cylinder; When the oil pumper walking beam is up, the piston rod that drives hydraulic cylinder is descending, the hydraulic cylinder internal pressure increases, pressure is applied on the piston that seals in the decompression assembly inner chamber by conduit, promotion is enclosed within piston on the central tube and presses to stage clip and move, the anterior volume of inner chamber is diminished, one-way valve opens, oil flows to into petroleum pipeline; When the oil pumper walking beam is descending, closed check valve, disconnect the oil stream between petroleum pipeline and the sealing decompression assembly, make between sealing decompression assembly and the oil well and form annular seal space, it is up that the oil pumper walking beam drives piston rod simultaneously, the hydraulic cylinder internal pressure reduces, piston in the sealing decompression assembly inner chamber resets under the effect of stage clip, and the anterior volume of inner chamber increases, and pressure reduces, thereby oil pumper well head back pressure is reduced, realize reducing the purpose of oil pumper well head back pressure.
Claims (3)
1, a kind of oil pumper well head back pressure decompressor, it is characterized in that comprising sealing decompression assembly, hydraulic cylinder, one way valve, wherein the inner chamber of sealing decompression assembly is communicated with the hydraulic cylinder outlet, the central tube of sealing decompression assembly is communicated with the one way valve input, when installing and using, the inner chamber that seals the decompression assembly is communicated with oil pumper well head threeway oil transportation mouth, the one way valve delivery outlet is communicated with petroleum pipeline, with the piston rod and the oil pumper walking beam of hydraulic cylinder, the cylinder sleeve of hydraulic cylinder and oil pumper support flexibly connect respectively.
2, a kind of oil pumper well head back pressure decompressor as claimed in claim 1, it is characterized in that described sealing decompression assembly comprises cylinder sleeve, front pressuring plate, rear fender, central tube, piston and compression spring, piston and compression spring housing are located on the cylinder sleeve lumen centers pipe, front pressuring plate is provided with tube connector and is connected with the cylinder sleeve front side, and rear fender is connected with cylinder sleeve rear side and central tube.
3, a kind of oil pumper well head back pressure decompressor as claimed in claim 1 is characterized in that described hydraulic cylinder, is provided with dust cover at upper cover of piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520030210 CN2773302Y (en) | 2005-03-15 | 2005-03-15 | Pressure back and reducing device for oil-pumping well mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520030210 CN2773302Y (en) | 2005-03-15 | 2005-03-15 | Pressure back and reducing device for oil-pumping well mouth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2773302Y true CN2773302Y (en) | 2006-04-19 |
Family
ID=36708566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520030210 Expired - Fee Related CN2773302Y (en) | 2005-03-15 | 2005-03-15 | Pressure back and reducing device for oil-pumping well mouth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2773302Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101592148B (en) * | 2009-05-18 | 2012-07-04 | 王春波 | High-suction water pumping booster |
| 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 |
| CN115012841A (en) * | 2022-06-29 | 2022-09-06 | 山东龙兴石油设备有限公司 | Oil development well head back pressure control device |
-
2005
- 2005-03-15 CN CN 200520030210 patent/CN2773302Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101592148B (en) * | 2009-05-18 | 2012-07-04 | 王春波 | High-suction water pumping booster |
| 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 |
| CN115012841A (en) * | 2022-06-29 | 2022-09-06 | 山东龙兴石油设备有限公司 | Oil development well head back pressure control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |