CN2517867Y - Downhole fluid two-way flow valve - Google Patents
Downhole fluid two-way flow valve Download PDFInfo
- Publication number
- CN2517867Y CN2517867Y CN 01269272 CN01269272U CN2517867Y CN 2517867 Y CN2517867 Y CN 2517867Y CN 01269272 CN01269272 CN 01269272 CN 01269272 U CN01269272 U CN 01269272U CN 2517867 Y CN2517867 Y CN 2517867Y
- Authority
- CN
- China
- Prior art keywords
- sealing plug
- central tube
- spring housing
- flow valve
- periphery
- 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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- Earth Drilling (AREA)
Abstract
The utility model relates to a flow valve for controlling the liquid flow of the oil field down-hole operation. The flow valve has the technical proposal that a central pipe is taken as a middle body, a spring sleeve is suited on the periphery, an outer thread at the upper end of the spring sleeve is connected with a fishing connector, an inner thread at the lower end is connected with a sealing plug, the central pipe moves in an annular hollow cavity composed of the spring sleeve and the sealing plug, a ball seat is arranged at the upper end of the central pipe and hermetically matched with a ball body, spring bodies are arranged in the central pipe and an annular space at the combined part of the spring sleeve and the sealing plug, a plurality of through holes are arranged at the upper part of the annular space into a radiating shape in the radial direction, through holes with the same quantity are arranged at the upper part of a central pipe 2 corresponding to the through holes, a channel connected with the central pipe is arranged on the fishing connector, and a sealing concave groove is arranged on the periphery of the sealing plug, and matched with a sealing ring. The flow valve of the utility model solves the problems existing in the down-hole operation, while the normal production of an oil well is ensured, the efficiency can be enhanced in the workover treatment, the oil and gas layer is protected, and other operations to the oil and gas layer can be also processed when necessary.
Description
One, technical field: the utility model relates to a kind of instrument of oilfield downhole operation, the flow valve of liquid flow under especially a kind of control well.
Two, background technology: in oilfield development process, cause the reduction of formation pressure owing to the generation of oil gas.Have only during the oil well operation by injecting a large amount of mud and carry out operation, cause so on the one hand that the mud consumption is big, construction cost is high, oil-gas Layer is damaged, the reduction crude output.
Three, summary of the invention: the utility model is exactly the above-mentioned technical problem that exists at prior art, and a kind of downhole fluid two-way flow valve is provided.
Its technical scheme is: with central tube 2 is intermediate, is with spring housing 3 in its periphery, and spring housing 3 upper external screw threads connect fishing joint 1, and the lower end internal thread connects sealing plug 4, and central tube 2 moves in the belt cavity of spring housing 3 and sealing plug 4 compositions.The upper end of central tube 2 is provided with ball seat and 8 airtight cooperations of spheroid.Joint portion at central tube 2 and spring housing 3 and sealing plug 4 is provided with annular space, spring body 5 is installed in annular space, be radially on the top of annular space that radiation is strong offers plural through hole, the through hole of equal number is offered in central tube 2 tops of through hole correspondence therewith, passage with central tube 2 conductings is arranged in fishing joint 1, periphery at sealing plug 4 is provided with sealed groove, cooperates the back to insert in the fish chamber of packer with sealing ring.
Such scheme also can further be improved to: the periphery at spring housing 3 and sealing plug 4 is fixed with centralizer 7.The top of fishing joint 1 is convex cone, conveniently cooperates with the fishing tool of giving up, and axially offers the passage that is communicated with central tube 2 in its periphery.Offer groove at spring housing 3 and central tube 2 joint portion correspondences, split ring 6 is installed in groove, the two is maintained fixed.At spring housing 3 and sealing plug 4 and spring housing 3 and fishing joint 1 threaded joints, the steady pin locking radial is arranged.
Flow valve of the present utility model has solved the problem that exists in the underground work, when guaranteeing the oil well ordinary production, can improve usefulness in workover treatment, and the protection oil-gas Layer can also be handled oil-gas Layer being carried out other operations where necessary.
Four, description of drawings: accompanying drawing is an overall structure schematic diagram of the present utility model.1 is fishing joint among the figure, the 2nd, and central tube, the 3rd, spring housing, the 4th, sealing plug, the 5th, spring body, the 6th, split ring, the 7th, centralizer, the 8th, spheroid.
Five, five specific embodiment:
The contrast accompanying drawing, with central tube 2 is intermediate, be with spring housing 3 in its periphery, spring housing 3 upper external screw threads connect fishing joint 1, the lower end internal thread connects sealing plug 4, central tube 2 moves in the belt cavity of spring housing 3 and sealing plug 4 compositions, in order to increase the sealing between central tube 2 and spring housing and the sealing plug 4, increases sealing ring at the two ends of central tube 2.The upper end of central tube 2 is provided with ball seat and 8 airtight cooperations of spheroid, and spheroid 8 is with the central tube shutoff when from pressurization.Joint portion at central tube 2 and spring housing 3 and sealing plug 4 is provided with annular space, and spring body 5 is installed in annular space, and the intensity of spring body 5 is selected according to down-hole pressure and adjusted here, and its bearing capacity is generally more than 20 MPas.Be radially on the top of annular space that radiation is strong offers plural through hole, be advisable with 4.Offer the through hole of equal number therewith on central tube 2 tops of through hole correspondence, when pressurization, two groups of through holes are wanted to connect.Axially offer passage with central tube 2 conductings in fishing joint 1 periphery.In oil pipe was inserted in sealing plug 4 lower ends, its periphery was provided with sealed groove, cooperates oil pipe and well bore isolation with sealing ring.Periphery at spring housing 3 and sealing plug 4 is fixed with centralizer 7.The top of fishing joint 1 is convex cone, so that cooperate with the fishing tool of giving up.Offer groove at spring housing 3 and central tube 2 joint portion correspondences, split ring 6 is installed in groove, the two is maintained fixed, after central tube 2 was subjected to top pressure effect, unlatching split ring 6 made between central tube 2 and the spring housing 3 and produces relative displacement.At spring housing 3 and sealing plug 4 and spring housing 3 and fishing joint 1 threaded joints, the steady pin locking radial is arranged.
During well workover, with oil pipe it is lowered in the fish chamber of packer, with pit shaft and zonal isolation, the liquid in the pit shaft can not can not flow into oil reservoir.During ordinary production, because wellbore pressure is low, crude oil enters pit shaft along central tube, by oil well pump it is pumped ground then.When needs are handled the stratum, pressurize in pit shaft from well head, spheroid is subjected to the wellbore pressure effect to push split ring open, and central tube is moved down, and forms pit shaft and is communicated with oil reservoir, so just can handle oil reservoir.After finishing dealing with, wellbore pressure reverts to low-pressure state, and central tube is up under the effect of spring body, the pathway closure between central tube and the spring housing.
Claims (5)
1, a kind of downhole fluid two-way flow valve, it is characterized in that: with central tube (2) is intermediate, be with spring housing (3) in its periphery, spring housing (3) upper external screw thread connects fishing joint (1), the lower end internal thread connects sealing plug (4), central tube (2) moves in the belt cavity of spring housing (3) and sealing plug (4) composition, the upper end of central tube (2) is provided with ball seat and airtight cooperation of spheroid (8), joint portion at central tube (2) and spring housing (3) and sealing plug (4) is provided with annular space, spring body (5) is installed in annular space, radially be the strong 2 plural through holes of offering of radiation on the top of annular space, the through hole of equal number is offered in the central tube of through hole correspondence (2) top therewith, passage with central tube (2) conducting is arranged in fishing joint (1), periphery at sealing plug (4) is provided with sealed groove, cooperates with sealing ring.
2, downhole fluid two-way flow valve according to claim 1 is characterized in that: the periphery at spring housing (3) and sealing plug (4) is fixed with centralizer (7).
3, downhole fluid two-way flow valve according to claim 1, it is characterized in that: the top of fishing joint (1) is convex cone, cooperates with the fishing tool of giving up, and axially offers the passage that is communicated with central tube (2) in its periphery.
4, according to claim 1,2 or 3 described downhole fluid two-way flow valves, it is characterized in that: offer groove at spring housing (3) and central tube (2) joint portion correspondence, split ring (6) is installed in groove.
5, downhole fluid two-way flow valve according to claim 4 is characterized in that: at spring housing (3) and sealing plug (4) and spring housing (3) and fishing joint (1) threaded joints, the steady pin locking radial is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01269272 CN2517867Y (en) | 2001-11-02 | 2001-11-02 | Downhole fluid two-way flow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01269272 CN2517867Y (en) | 2001-11-02 | 2001-11-02 | Downhole fluid two-way flow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2517867Y true CN2517867Y (en) | 2002-10-23 |
Family
ID=33675292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01269272 Expired - Fee Related CN2517867Y (en) | 2001-11-02 | 2001-11-02 | Downhole fluid two-way flow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2517867Y (en) |
-
2001
- 2001-11-02 CN CN 01269272 patent/CN2517867Y/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 | ||
| 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 |