CN206636537U - Well head backward flowing preventing device - Google Patents
Well head backward flowing preventing device Download PDFInfo
- Publication number
- CN206636537U CN206636537U CN201720364193.8U CN201720364193U CN206636537U CN 206636537 U CN206636537 U CN 206636537U CN 201720364193 U CN201720364193 U CN 201720364193U CN 206636537 U CN206636537 U CN 206636537U
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- CN
- China
- Prior art keywords
- seal receptacle
- extension spring
- pipe fitting
- well
- valve
- 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 discloses a kind of pumping well head backward flowing preventing device, is made up of body pipe fitting and inner core sealing, body pipe fitting has accommodating chamber and both ends pipeline thread.Inner core hermetic unit includes seal receptacle, valve element extension spring, valve core rod etc..When liquid enters accommodating chamber rear baffle stress, so as to be stretched with movable valve plug extension spring, baffle plate separates with seal receptacle, and liquid enters liquid outlet channel by accommodating chamber；During borehole failure, liquid backflow causes to accommodate cavity pressure decline, and baffle plate closes under by back pressure and the effect of valve element tension spring tension with seal receptacle, so as to shut oil flow channel, prevents that liquid from pouring in down a chimney, and breaks with polished rod of pumping well and take off blowout prevention prevention crude oil leakage；Prevent oil well by the effect of stolen；The functions such as well liquid non-return are controlled during production.Simultaneously because installation uses screwed connection, unsafe factor caused by fire operation is avoided；In-site installation is efficient, convenient, further improves the stability of system, reliability, the effect of well head reverse-filling has been reached using the present apparatus.
Description
Technical field
The well head backward flowing preventing device that a kind of oil pumping machine well head uses is the utility model is related to, can be on well head or ground
Pipeline installs the present apparatus, can effectively prevent the crude oil leakage in well head and pipeline and pour in down a chimney the loss that wellbore zone is come.
Background technology
With late period of oil field, strata pressure is low, and surface fluids easily pour in down a chimney to stratum, and indivedual wells may cause
Formation blockage, collecting well group Produced Liquid, which pours in down a chimney, causes production loss, environmental pollution；Other light rod-broken (below packing box) is afterwards
Facial canal line crude oil flows backwards from wellhead packing box and sprayed, and will also result in oil pumper, well site pollution.
After entering high water-cut stage with oil field development, underground medium environment is increasingly sophisticated, and Produced Liquid exacerbates the corruption of tubing string
Erosion, oil well leakage phenomena frequency are existing.And arborous connection surface gathering and transferring flow and collecting well group single tube flow be Future Development must
Right trend, well group oil pipe pour in down a chimney and can not avoided caused by missing.
Current common ball-and-seat, cost is higher, and service life is short (6 months or so), is not easy to well head installation, easily
Failure is influenceed by factors such as foulings, and parallel can only be installed；Common ball-and-seat using flange connection, flange seal by it is extraneous because
Element influences more, need to get angry during installation, potential safety hazard be present.
CN201220240583.1 discloses a kind of thick oil well reverse-filling resistance oil nozzle, by oil nozzle (1), baffle plate pin (2), baffle plate
(3), plug (4), resistance oil nozzle sleeve (5) are formed, wherein：Resistance oil nozzle sleeve (5) is internally provided with oil inlet (102), shoe cream room (103), gone out
Hydraulic fluid port (104), oil nozzle (1) are internally provided with oil nozzle oil suction chamber (101), and oil nozzle (1) is arranged on oil nozzle by thread seal connection
Cover in (5), baffle plate (3) is installed on oil nozzle (1) one end by baffle plate pin (2), and plug (4) is arranged on oil by thread seal connection
On muzzle (5), solve to pour in down a chimney problem in heavy crude well production.
CN201320517055 discloses a kind of oil pumper well liquid recycle control valve, is particularly applicable to oil field equipment neck
Domain, including main body valve seat, thread, valve rod, valve rod cover, control spring, Two-stage control spring, spring shield, sealing gasket, go out liquid
Hole, two level fluid hole, it is characterized in that being equipped with sealing gasket on main body valve seat, main body valve seat is arranged on the both ends of fluid hole, valve rod
It is connected with fluid hole by thread, equipped with control spring between valve rod cover and Two-stage control spring, in the outside of entirety
Equipped with spring shield, two level fluid hole is provided with spring shield, there is the disconnected de- blowout prevention of this polished rod of pumping well；Prevent oil well by stolen
Effect；Well liquid check function is controlled during with production；Well liquid pours in down a chimney function during with shutdown of pumping machine；Also have and automatically adjust
Control function.
CN201220335394 provides the sleeve pipe and set in a kind of anti-control of anti-channeling zonal flow rate flow string, including oil well
Oil pipe in pipe, it is described in each reservoir exploitation section at least provided with a set of flow control valve of differential pressure on the tubing string of the oil pipe
Flow control valve of differential pressure is by existing pressure difference in each oil reservoir and oil pipe come the aperture of control valve.Its specific magnitude of pressure differential can root
Preset according to adjusting set and spring, the valve can control oil reservoir flow, while prevent that increase is led suddenly because of other certain formation pressures
The problem of causing this layer of anti-channeling, it is possible to achieve zonal flow rate control production；Suitable for high angle hole, the exploitation of horizontal well hierarchical；It is anti-
Only oil reservoir anti-channeling is poured in down a chimney.
CN201020121655 discloses the built-in of a kind of valve or pipeline that are used in liquid conducting pipes or valve
Ball-and-seat, the present apparatus is installed in valve or pipeline, can effectively prevent the leakage of the fluid in valve or pipeline or pour in down a chimney and bring
Loss, loss caused by pouring in down a chimney such as crude oil leakage and well liquid.Ball-and-seat built in this includes housing and valve element, and valve element is installed on
In housing, spool stroke centring ring is housed in the port of export inner chamber of housing, the port of export is cylindrical to be equipped with lock sealing mechanism.The structure
It can prevent that liquid pours in down a chimney caused by the factors such as oil well pump failure, oil pipe leakage, avoids oil well liquid measure from losing.
CN200620083608 discloses a kind of backward flowing preventing device, including the pipe nipple installed of housing and its both ends and connects short
Section, in addition to the indicator that the housing cavity is installed, the fixed cover and sliding sleeve installed respectively in the pipe nipple and connecting short section,
Lower housing portion is installed on ball-and-seat, the pipe nipple, connecting short section and ball-and-seat and housing to be welded to connect, and has reverse-filling, prevents
The features such as stealing situation fuel-displaced with qualitative intuitively display oil well.
CN03271418 discloses a kind of one-way valve on wellhead of oil prodn. well that petroleum industry uses, suitable in oil pumper, screw rod
Used on the mechanical oil wells such as pump.The check valve is made up of valve body and counterflow-preventing mechanism, and valve body is provided with fluid course, counterflow-preventing machine
Structure is assembled into one with valve body.The valve small volume, it is in light weight, screwed connection, get angry without well head, be easily installed and change, make
With convenient, positive effect, suitable for oil well, reversely damming for oil well production can be achieved, avoid oil well from pouring in down a chimney phenomenon.
The content of the invention
Pour in down a chimney to solve the fluid in surface line to pit shaft, by asking common ball-and-seat is existing in use
Topic is dissected, and pours in down a chimney problem for cluster well field, develop a kind of cost is low, processing is simple, install convenient, suitable for individual well
The novel wellhead backward flowing preventing device of well head, thoroughly prevent to pour in down a chimney problem, production loss can be effectively reduced, evade trend of environmental protection
Danger.
Well mouth of oil well backward flowing preventing device of the present utility model, it is characterised in that：Well mouth of oil well backward flowing preventing device is by body tube
Part part and the inner core hermetic unit composition being placed in body pipe fitting；Body pipe fitting part includes accommodating chamber 8 and both ends pipeline
Dope nonyl 5, the both ends of body pipe fitting are connected by dope nonyl 5 with pipeline；Inner core hermetic unit includes seal receptacle 4, valve
Core extension spring 3, extension spring fix bar 2, adjusting nut 1, valve core rod 7；Seal receptacle 4 coaxially is housed in the middle part of body inside pipe fitting, it is close
Envelope seat 4 is hollow pipe column, and its outer wall connects with body pipe fitting inner wall, there is a valve core rod 7 in seal receptacle 4, and valve core rod 7 is located at
The axle center of seal receptacle 4, the one end of valve core rod 7 are fixed on plate washer 6, and the diameter of plate washer 6 is more than the internal diameter of seal receptacle 4, is placed in seal receptacle
Outlet outside, the other end of valve core rod 7 are socketed adjusting nut 1 after passing through extension spring fix bar 2, have valve element extension spring 3 to be inserted in valve element drawing
In bar 7, the one end of valve element extension spring 3 is withstood on plate washer 6, and the other end of valve element extension spring 3 is withstood in extension spring fix bar 2,2 liang of extension spring fix bar
The porch of seal receptacle 4 is fixed at end.
, can also be by seal receptacle 4 and the body to connect therewith pipe fitting inner wall as a portion from device fabrication is facilitated
Part, welded with other parts, i.e. seal receptacle 4 and body pipe fitting inner wall is integrated processing, as shown in Figure 1.
Well mouth of oil well backward flowing preventing device operation principle of the present utility model is：The device both ends screwed connection, can be installed
In being produced on producing well outlet line between gate and back-pressure gate, after oil stream enters the device, seal receptacle is promoted, spring is drawn
Stretch, open oil flow channel, Crude Oil Transportation is entered into pipeline；When well wellbore breaks down, outlet pressure is more than the device import
During pressure, under the double action of spring tension and back pressure, seal receptacle is setting, shuts oil flow channel, prevents oil stream from pouring in down a chimney into well
It is interior or sprayed by polished rod stuffing box.
The device is simple for production, and cost is cheap, can also use waste and scrap (such as waste and old water injecting pump discharge opeing valve element)
Make, cost efficiency can be achieved；Valve element uses nonmetallic anti-corrosion material, increases decay resistance, increases the service life.
Well mouth of oil well backward flowing preventing device of the present utility model is simple in construction, is easy to make；Cost is relatively low, meets carry out scale
The condition that production, scale are promoted, and service life is grown, and high sensitivity, it is low (tension spring tension is adjustable) to start pressure；Do not limited by direction
System (level, vertically can all be installed), can farthest reduce oil stream backflow.Because installation uses screwed connection, avoid moving
Unsafe factor caused by fiery operation；In-site installation is efficient, convenient, further improves the stability of system, reliability.Use this
Device has reached the effect of well head reverse-filling, solve thes problems, such as that collecting well group field management is present, and realizes management and increases
The purpose of production, crude oil loss, production cost can be reduced, formation blockage risk is reduced, avoids environmental pollution.
Brief description of the drawings
Fig. 1 is to apply a kind of well head backward flowing preventing device structural representation of the present utility model.
1- adjusting nuts in figure, 2- extension spring fix bars, 3- valve element extension springs, 4- seal receptacles, 5- dope nonyls, 6- baffle plates, 7-
Valve core rod, 8- accommodating chambers.
Embodiment
Using the well head backward flowing preventing device shown in Fig. 1.The utility model is done further below in conjunction with accompanying drawing
It is described in detail.
Well mouth of oil well backward flowing preventing device is made up of body pipe fitting part and the inner core hermetic unit being placed in body pipe fitting；This
Body pipe section point includes accommodating chamber 8 and both ends pipeline dope nonyl 5, and the both ends of body pipe fitting pass through dope nonyl 5 and pipeline
Connect；Inner core hermetic unit includes seal receptacle 4, valve element extension spring 3, extension spring fix bar 2, adjusting nut 1, valve core rod 7；At this
Seal receptacle 4 coaxially is housed in the middle part of body inside pipe fitting, seal receptacle 4 is hollow pipe column, and its outer wall connects with body pipe fitting inner wall, sealing
There is a valve core rod 7 in seat 4, valve core rod 7 is located at the axle center of seal receptacle 4, and the one end of valve core rod 7 is fixed on plate washer 6, plate washer
6 diameters are more than the internal diameter of seal receptacle 4, are placed on the outside of seal receptacle, and the other end of valve core rod 7 is socketed regulation after passing through extension spring fix bar 2
Nut 1, there is valve element extension spring 3 to be inserted in valve core rod 7, the one end of valve element extension spring 3 is withstood on plate washer 6, and the other end of valve element extension spring 3 is withstood on
In extension spring fix bar 2, the porch of seal receptacle 4 is fixed at the both ends of extension spring fix bar 2.Seal receptacle 4 and body pipe fitting in this example
Inwall is integrated processing.
In the backward flowing preventing device structure, adjusting nut 1 is used for the tension intensity of adjusting spool extension spring 3, according to wellhead back pressure
Adjust its elasticity.The both sides of valve element extension spring 3 are separately fixed at extension spring fix bar 2 and the inner side of baffle plate 6, and baffle plate 6 is placed in seal receptacle
Outside, and the diameter of baffle plate 6 is more than seal receptacle internal diameter, by valve element extension spring 3 drive baffle plate 6 stretch with it is closed.Oil well normally goes out liquid
When, baffle plate 6 is driven valve element extension spring 3 and stretched, and departs from one end of seal receptacle 4；Not going out liquid, then baffle plate 6 drives receipts by valve element extension spring 3
Contract closed.Baffle plate 6 and the end thereof contacts of seal receptacle 4, the port of export of accommodating chamber 8 are closed.Baffle plate 6 is main stressed member, by both ends
Pressure size determines its position relationship with seal receptacle 4, and well wellbore pressure then separates greatly with seal receptacle 4 normally crosses liquid, pipeline
Pressure then closes greatly with seal receptacle 4, prevents liquid from pouring in down a chimney.
Claims (2)
- A kind of 1. well mouth of oil well backward flowing preventing device, it is characterised in that：Well mouth of oil well backward flowing preventing device is by body pipe fitting part and puts In the inner core hermetic unit composition in body pipe fitting；Body pipe fitting part includes accommodating chamber (8) and both ends pipeline dope nonyl (5), the both ends of body pipe fitting are connected by dope nonyl (5) with pipeline；Inner core hermetic unit includes seal receptacle (4), valve element Extension spring (3), extension spring fix bar (2), adjusting nut (1), valve core rod (7)；It is coaxial equipped with sealing in the middle part of body inside pipe fitting Seat (4), seal receptacle (4) is hollow pipe column, and its outer wall connects with body pipe fitting inner wall, has a valve core rod in seal receptacle (4) (7), valve core rod (7) is located at the axle center of seal receptacle (4), and valve core rod (7) one end is fixed on plate washer (6), plate washer (6) diameter More than seal receptacle (4) internal diameter, it is placed on the outside of seal receptacle, valve core rod (7) other end is socketed regulation afterwards through extension spring fix bar (2) Nut (1), there is valve element extension spring (3) to be inserted in valve core rod (7), valve element extension spring (3) one end is withstood on plate washer (6), valve element extension spring (3) other end is withstood in extension spring fix bar (2), and the porch of seal receptacle (4) is fixed at extension spring fix bar (2) both ends.
- 2. well mouth of oil well backward flowing preventing device according to claim 1, it is characterised in that：In seal receptacle (4) and body pipe fitting Wall is integrated processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720364193.8U CN206636537U (en) | 2017-03-30 | 2017-03-30 | Well head backward flowing preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720364193.8U CN206636537U (en) | 2017-03-30 | 2017-03-30 | Well head backward flowing preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206636537U true CN206636537U (en) | 2017-11-14 |
Family
ID=60247101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720364193.8U Expired - Fee Related CN206636537U (en) | 2017-03-30 | 2017-03-30 | Well head backward flowing preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206636537U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241808A (en) * | 2019-05-31 | 2019-09-17 | 李博文 | A kind of internal connecting type grouting stop grouting plug device and grouting method |
| CN112443293A (en) * | 2020-12-20 | 2021-03-05 | 董迎考 | Multifunctional oil well wellhead backflow prevention device |
-
2017
- 2017-03-30 CN CN201720364193.8U patent/CN206636537U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241808A (en) * | 2019-05-31 | 2019-09-17 | 李博文 | A kind of internal connecting type grouting stop grouting plug device and grouting method |
| CN112443293A (en) * | 2020-12-20 | 2021-03-05 | 董迎考 | Multifunctional oil well wellhead backflow prevention device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171114 Termination date: 20180330 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |