CN207004479U - Horizontal well fracturing is with repeatedly sealed constant pressure check valve - Google Patents
Horizontal well fracturing is with repeatedly sealed constant pressure check valve Download PDFInfo
- Publication number
- CN207004479U CN207004479U CN201720644753.5U CN201720644753U CN207004479U CN 207004479 U CN207004479 U CN 207004479U CN 201720644753 U CN201720644753 U CN 201720644753U CN 207004479 U CN207004479 U CN 207004479U
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- China
- Prior art keywords
- valve
- horizontal well
- utility
- valve seat
- model
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 abstract description 14
- 238000005406 washing Methods 0.000 abstract description 11
- 238000010276 construction Methods 0.000 abstract description 4
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
the utility model relates to an oil recovery engineering technical field belongs to the horizontal well fracturing and uses repeatedly sealed level pressure single current valve, the utility model provides a conventional steel ball sealed single current valve because the unstable and the easy problem that leads to unable repeated sealing of erosion of gravity reason sealing performance when the level is placed the utility model discloses by top connection (1), prevent changeing pin (2), plug (3), right cover (4), spring (5), support ring (6), valve (7), overcoat (8), valve seat (9), L type sealing washer (10), lower clutch (11) and constitute, the utility model has the advantages of improve erosion resistance performance, repeated sealing performance is good, satisfies fracturing construction and pressure back circulation sand washing needs.
Description
Technical field
Technical field of oil production engineering is the utility model is related to, belongs to fractured horizontal well repeatable seal constant pressure check valve.
Background technology
Some multistage fracturing technologies need inverse circular sand washing adapter to prevent tubing string from sand card occurs, it is necessary at tubing string bottom after pressure break
Portion connects ball-and-seat, meets positive seal and pressure bearing needs during pressure break, and ball-and-seat is opened during inverse circular sand washing adapter, establishes circulation canal,
Continue the next interval of pressure break after sand washing, it is necessary to which ball-and-seat can be repeated several times sealing.Conventional ball-and-seat is matched somebody with somebody using steel ball with ball seat more
Box-like sealing structure, when fracturing fluid carries fracturing sand, easy erosion steel ball and ball seat, it can not be again sealed off after inverse circular sand washing adapter,
Lead to not continue pressure break.Therefore, repeatable seal ball-and-seat need to be studied, meet multistage pressing crack construction inverse circular sand washing adapter needs.
The content of the invention
The purpose of this utility model is that design one kind can meet multistage pressing crack construction inverse circular sand washing adapter needs, is repeated again
The fractured horizontal well repeatedly sealed repeatable seal constant pressure check valve.
The utility model is realized by following device：It is by top connection, anti-rotation pin, plug, supporting positive cover, bullet
Spring, support ring, valve, overcoat, valve seat, L-type sealing ring, wherein lower contact composition, top connection and outer set upper side screwed connection,
And fixed by anti-rotation pin, lower contact and the screwed connection of overcoat lower end, and fixed by anti-rotation pin, plug connects with righting threading
Connect, support ring inner side and supporting positive cover screwed connection, and fixed by anti-rotation pin, connection, spring are contacted with overcoat on the outside of support ring
It is placed on supporting positive cover, for spring clip between plug and valve, valve contacts connection with valve seat, and valve seat connects with lower contact screw thread
Connect, L-type sealing ring is placed in lower contact, and L-type sealing ring contacts connection with valve and valve seat, is communicated with stitching on supporting positive cover.
Valve is connected with valve seat conical surface seal.
Support ring is split-type structure.
Valve and valve seat use salt stove quenching technical.
Compared with the prior art the utility model has the following advantages that：
The sealing means of valve and valve seat repeat good seal performance, and erosion resistance, and sediment outflow performance is good, can meet multistage pressure
Split inverse circular sand washing adapter needs.
Brief description of the drawings：
Fig. 1 is the utility model structure diagram.
1- top connections in figure, 2- anti-rotation pins, 3- plugs, 4- supporting positive covers, 5- springs, 6- support rings, 7- valves, outside 8-
Set, 9- valve seats, 10-L types sealing ring, 11- lower contact 12- communicating slits.
Embodiment：
The utility model is described in further detail below in conjunction with the accompanying drawings：It is by top connection 1, anti-rotation pin 2, plug 3, righting
Set 4, spring 5, support ring 6, valve 7, overcoat 8, valve seat 9, L-type sealing ring 10, lower contact 11 form, wherein top connection 1 with
The upper end screwed connection of overcoat 8, and fixed by anti-rotation pin 2, lower contact 11 and the lower end screwed connection of overcoat 8, and by anti-rotation pin 2
Fix, plug 3 and the screwed connection of supporting positive cover 4, the inner side of support ring 6 and the screwed connection of supporting positive cover 4, and fixed by anti-rotation pin 2, propped up
The outside of pushing out ring 6 contacts connection with overcoat 8, and spring 5 is placed on supporting positive cover 4, and spring 5 is clipped between plug 3 and valve 7, valve 7 and
The contact connection of valve seat 9, valve seat 9 and the screwed connection of lower contact 11, L-type sealing ring 10 are placed in lower contact 11, L-type sealing ring
10 contact connection with valve 7 and valve seat 9, and seam 12 is communicated with supporting positive cover 4.
Valve 7 is connected with the conical surface seal of valve seat 9.
Support ring 6 is split-type structure.
Valve 7 and valve seat 9 use salt stove quenching technical.
During onsite application, the utility model is connected with spray gun, with oil pipe tripping in, when needing inverse circular sand washing adapter after pressure break, by
Sleeve pipe injects sand cleaning fluid, and valve 7 is moved up when casing pressure is higher than oil pressure, and spring 8 moves up with valve 7, and valve 7 is opened, and is built
Vertical reacting cycle passage carries out sand washing, can carry out next section of pressure break after sand washing by construction requirement, remains to repeat to seal during pressure break,
Meet positive seal and pressure bearing requirement.
Claims (4)
1. fractured horizontal well repeatable seal constant pressure check valve, it is characterised in that：It is by top connection（1）, anti-rotation pin（2）、
Plug（3）, supporting positive cover（4）, spring（5）, support ring（6）, valve（7）, overcoat（8）, valve seat（9）, L-type sealing ring（10）、
Lower contact（11）Composition, wherein top connection（1）With overcoat（8）Upper end screwed connection, and by anti-rotation pin（2）It is fixed, lower contact
（11）With overcoat（8）Lower end screwed connection, and by anti-rotation pin（2）It is fixed, plug（3）With supporting positive cover（4）Screwed connection, support
Ring（6）Inner side and supporting positive cover（4）Screwed connection, and by anti-rotation pin（2）It is fixed, support ring（6）Outside and overcoat（8）Contact connects
Connect, spring（5）It is placed on supporting positive cover（4）On, spring（5）It is clipped in plug（3）And valve（7）Between, valve（7）With valve seat（9）
Contact connection, valve seat（9）With lower contact（11）Screwed connection, L-type sealing ring（10）It is placed on lower contact（11）In, L-type sealing
Circle（10）With valve（7）And valve seat（9）Contact connection, supporting positive cover（4）On be communicated with stitching（12）.
2. fractured horizontal well according to claim 1 repeatable seal constant pressure check valve, it is characterised in that：Valve（7）
With valve seat（9）Conical surface seal connects.
3. fractured horizontal well according to claim 1 repeatable seal constant pressure check valve, it is characterised in that：Support ring
（6）For split-type structure.
4. fractured horizontal well according to claim 1 repeatable seal constant pressure check valve, it is characterised in that：Valve（7）
And valve seat（9）Use salt stove quenching technical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720644753.5U CN207004479U (en) | 2017-06-05 | 2017-06-05 | Horizontal well fracturing is with repeatedly sealed constant pressure check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720644753.5U CN207004479U (en) | 2017-06-05 | 2017-06-05 | Horizontal well fracturing is with repeatedly sealed constant pressure check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207004479U true CN207004479U (en) | 2018-02-13 |
Family
ID=61446079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720644753.5U Active CN207004479U (en) | 2017-06-05 | 2017-06-05 | Horizontal well fracturing is with repeatedly sealed constant pressure check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207004479U (en) |
-
2017
- 2017-06-05 CN CN201720644753.5U patent/CN207004479U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |