CN206290227U - A kind of switchable formula reverse circulation valve - Google Patents
A kind of switchable formula reverse circulation valve Download PDFInfo
- Publication number
- CN206290227U CN206290227U CN201621413498.5U CN201621413498U CN206290227U CN 206290227 U CN206290227 U CN 206290227U CN 201621413498 U CN201621413498 U CN 201621413498U CN 206290227 U CN206290227 U CN 206290227U
- Authority
- CN
- China
- Prior art keywords
- circulation valve
- reverse circulation
- ring
- connecting cylinder
- piston
- 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.)
- Active
Links
Abstract
The utility model provides a kind of switchable formula reverse circulation valve, including top connection, connecting cylinder, lower contact and interlock assembly, and the upper end connection top connection of connecting cylinder, the lower end connection lower contact of connecting cylinder is provided with interlock assembly on connecting cylinder；The utility model is by setting interlock assembly, during so that needing to close circulation canal, can be by entering switching tools to reverse circulation valve position under steel wire operation, switching tools can be engaged with the section inside reverse circulation valve, only need to above carry steel wire instrument, so that it may realize the closing of circulation canal, shorten duty cycle, pressure break cost is reduced, production efficiency is improve.
Description
Technical field
The utility model is related to Oil/gas Well downhole tool technical field, more particularly to a kind of switchable formula reverse circulation valve.
Background technology
Reverse circulation valve be for deep well fracturing after reacting cycle well-flushing instrument, it is to ensure during direct circulation
Circulation seal and meet the requirement of reacting cycle well-flushing, traditional reverse circulation valve, only ON cycle passage this single work(
Can, in production process after pressure break or pressure break, there is sand plug, promotion piston is suppressed by annular space, expose circulation canal, make annular space
With communicating passage is set up in oil pipe, so as to carry out reacting cycle operation, it is possible to achieve release sand plug purpose.
But when after the backwash end of job, it is necessary to pressure break or during production again, circulation port cannot be closed, it is impossible to meet continuous work
The requirement of industry, now only upper lift pipe string, takes out reverse circulation valve, and manual-lock reverse circulation valve could be realized, so not only operation
Cycle is long, high cost, while there is also great operating risk.
Utility model content
For above-mentioned technical problem, the purpose of this utility model is to shorten duty cycle, improve production efficiency, there is provided
A kind of is to be capable of achieving the switchable formula reverse circulation valve that reverse circulation valve is closed without upper lift pipe string.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is：A kind of switchable formula reverse circulation valve, including
Top connection, connecting cylinder and lower contact, the upper end connection top connection of connecting cylinder, the lower end connection lower contact of connecting cylinder, the connection
Interlock assembly being provided with cylinder and O-ring and back-up ring being installed, the top connection is provided with snap ring, O-ring and back-up ring, described
Lower contact is provided with lower snap ring and O-ring.
Preferably, the interlock assembly includes piston and fixture block, and piston and connecting cylinder are fixed by shear screw, and fixture block leads to
Cross shear pin to be connected with piston lower portion, upper piston area is provided with O-ring and back-up ring；Piston lower portion is provided with O-ring, interior lock machine
Structure top is consistent with the closure size of interlock assembly bottom, when inside is suppressed, interlock assembly top and interlock assembly bottom institute
It is stressed consistent, therefore shear screw can't be caused to damage；When shear pin is cut, fixture block is separated with piston, this
When interlock assembly top it is inconsistent with the closure size of interlock assembly bottom, suffered active force is also inconsistent.
A kind of switchable formula reverse circulation valve that the utility model is provided, by setting interlock assembly so that need closing to follow
During ring passage, can by entering switching tools to reverse circulation valve position under steel wire operation, switching tools can with reverse circulation valve inside
Section engage, only need to above carry steel wire instrument, so that it may realize the closing of circulation canal, shorten duty cycle, reduce pressure break into
This, improves production efficiency.
Brief description of the drawings
Fig. 1 is overall structure sectional view of the present utility model；
Fig. 2 is the open mode schematic diagram of the utility model reverse circulation valve circulation port；
Fig. 3 is the closed mode schematic diagram of the utility model reverse circulation valve circulation port；
Fig. 4 is the design sketch that the utility model is used cooperatively with switching tools.
Wherein, 1 is top connection；2 is connecting cylinder；3 is lower contact；4 is interlock assembly；41 is piston；42 is fixture block；5 are
Upper snap ring；6 is O-ring；7 is back-up ring；8 is lower snap ring；9 is shear screw；10 is shear pin；11 is switching tools；110 are
Projection；111 is spring.
Specific embodiment
In order that those skilled in the art is better understood from the technical solution of the utility model, below in conjunction with the accompanying drawings to this
The technical scheme of utility model is further elaborated.
As shown in Figure 1 and 2, a kind of switchable formula reverse circulation valve, including top connection 1, connecting cylinder 2, lower contact 3, piston 41,
Fixture block 42, upper snap ring 5, lower snap ring 8, O-ring 6 and back-up ring 7, the upper end of the top connection 1 and connecting cylinder 2 to be threadedly coupled, on
Joint 1 is provided with snap ring 5, O-ring 6 and back-up ring 7, and, to be threadedly coupled, lower contact 3 is installed for the lower end of connecting cylinder 2 and lower contact 3
There are lower snap ring 8 and O-ring 6, piston 41 and connecting cylinder 2 are fixed by shear screw 9, piston 41 and connecting cylinder 2 are fitted with O-shaped
Circle 6 and back-up ring 7, piston 41 and fixture block 42 are connected by shear pin 10.
In use, to projected depth, then will be suppressed from annular space under reverse circulation valve at the appropriate speed first, pressed
Power enters plunger shaft from the circulation port of connecting cylinder 2, promotes piston 41 to move downward, and cuts shear screw 9, and piston 41 drives fixture block 42
Move downward, final fixture block 42 is stuck on lower snap ring 8, circulation port is opened, be that ensuing cleaning sand plug is prepared.
As shown in Fig. 3 ~ 4, when need close circulation port, again pressure break or production when, opened by entering standard under steel wire operation
Pass instrument 11, switching tools 11 are provided with projection 110 and spring 111, under enter rear spring 111 because elastic force is acted on, strut projection
11 so that projection 11 is stuck in the groove of piston 41, steel wire instrument is above carried, shear pin 10 is cut, fixture block 42 is separated with piston 41,
Switching tools band piston 41 is moved upwardly together, and such that it is able to smoothly close circulation port, final piston 41 is stuck in snap ring 5
On, permanent closing is formed, it is that ensuing fracturing work again is prepared.
With reference to the Opening pressure of original circulating valve, and piston 41 and switching tools connect the reverse circulation valve circulation port Opening pressure
The size normalised of mating part is connect, can be circulated so as to smoothly realization with the standard switch instrument matches mutually of steel wire operation
The closing in hole.
The top of interlock assembly 4 and the lower seal size of interlock assembly 4 are the same, when inside is suppressed, act on internal lock
The pressure of the top of mechanism 4 and the bottom of interlock assembly 4 be also it is the same, i.e. interlock assembly in poised state, now there will be no
Active force is acted in shear screw 9, shear screw 9 will not be caused to damage, it is ensured that job safety, reduces operation wind
Danger.
When circulation port is in opening, the fixture block 42 being connected with piston lower portion is stuck on lower snap ring 8, is followed when closing is needed
During annular distance, switching tools are above carried, switching tools band piston 41 is moved upwardly together, and shear pin 10 is cut, the He of fixture block 42
Piston 41 is separated, and interlock assembly top becomes inconsistent with interlock assembly lower seal size, and suffered active force is also inconsistent, from
And can realize smoothly closing the purpose of circulation port.
By setting interlock assembly 4, after bore closure is circulated, circulation port is locked in closed position, forms permanent
The closed mode of property, reduces pressure break risk.
A kind of switchable formula reverse circulation valve that the utility model is provided, by setting interlock assembly so that need closing to follow
During ring passage, can by entering switching tools to reverse circulation valve position under steel wire operation, switching tools can with reverse circulation valve inside
Section engage, only need to above carry steel wire instrument, so that it may realize the closing of circulation canal, shorten duty cycle, reduce pressure break into
This, improves production efficiency.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of switchable formula reverse circulation valve, including top connection（1）, connecting cylinder（2）And lower contact（3）, the connecting cylinder（2）Point
Top connection is not connected（1）And lower contact（3）, it is characterised in that：The connecting cylinder（2）On be provided with interlock assembly（4）.
2. switchable formula reverse circulation valve according to claim 1, it is characterised in that：The top connection（1）Card is installed
Ring（5）, O-ring（6）And back-up ring（7）, the lower contact（3）Lower snap ring is installed（8）And O-ring（6）.
3. switchable formula reverse circulation valve according to claim 2, it is characterised in that：The interlock assembly（4）Including piston
（41）And fixture block（42）.
4. switchable formula reverse circulation valve according to claim 3, it is characterised in that：The piston（41）And connecting cylinder（2）
By shear screw（9）It is fixed；The fixture block（42）By shear pin（10）With piston（41）Bottom connects.
5. switchable formula reverse circulation valve according to claim 4, it is characterised in that：The piston（41）Top is provided with O
Type circle（6）And back-up ring（7）；Piston（41）Bottom is provided with O-ring（6）.
6. switchable formula reverse circulation valve according to claim 5, it is characterised in that：The connecting cylinder（2）O-ring is installed
（6）And back-up ring（7）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621413498.5U CN206290227U (en) | 2016-12-22 | 2016-12-22 | A kind of switchable formula reverse circulation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621413498.5U CN206290227U (en) | 2016-12-22 | 2016-12-22 | A kind of switchable formula reverse circulation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206290227U true CN206290227U (en) | 2017-06-30 |
Family
ID=59105007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621413498.5U Active CN206290227U (en) | 2016-12-22 | 2016-12-22 | A kind of switchable formula reverse circulation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206290227U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630049A (en) * | 2018-11-09 | 2019-04-16 | 中国海洋石油集团有限公司 | A kind of reverse circulation valve |
| CN113027365A (en) * | 2019-12-24 | 2021-06-25 | 中国石油天然气集团有限公司 | Drilling and grinding multi-time opening and closing circulating valve |
-
2016
- 2016-12-22 CN CN201621413498.5U patent/CN206290227U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630049A (en) * | 2018-11-09 | 2019-04-16 | 中国海洋石油集团有限公司 | A kind of reverse circulation valve |
| CN109630049B (en) * | 2018-11-09 | 2021-04-06 | 中国海洋石油集团有限公司 | Reverse circulation valve |
| CN113027365A (en) * | 2019-12-24 | 2021-06-25 | 中国石油天然气集团有限公司 | Drilling and grinding multi-time opening and closing circulating valve |
| CN113027365B (en) * | 2019-12-24 | 2022-12-02 | 中国石油天然气集团有限公司 | Drilling and grinding multi-time opening and closing circulating valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206290227U (en) | A kind of switchable formula reverse circulation valve | |
| CN204225847U (en) | Well cementation sliding sleeve | |
| CN205858254U (en) | A kind of drilling and repairing well annular preventer | |
| CN104234658A (en) | Hydraulic type drilling-free grading cementing device | |
| CN103742099B (en) | Perforating and fracturing packing device | |
| CN204457614U (en) | A kind of two disc type circulating valve that breaks | |
| CN206290243U (en) | One kind can close pressure difference sliding sleeve | |
| CN202831036U (en) | Rotary type grab bucket | |
| CN107558951A (en) | A kind of hydraulic selector circulation slide sleeve | |
| CN205743831U (en) | Bore hole circulating valve panel assembly | |
| CN201705279U (en) | Expansion type sealer | |
| CN202249880U (en) | Pipe shearing device for oil field | |
| CN103670332B (en) | Shaft isolation valve | |
| CN106285544A (en) | A kind of thermal recovery steam injection well head obturator | |
| CN104314518A (en) | Opening-closing tool | |
| CN204327045U (en) | Switching tools | |
| CN202531106U (en) | Screw pump well-flushing valve | |
| CN205297438U (en) | Well head hydraulic seal device | |
| CN203655234U (en) | Shaft isolating valve | |
| CN203488146U (en) | Reverse circulation valve capable of being opened and closed | |
| CN208718613U (en) | It is a kind of to seal entirely and partly seal compound ram block | |
| CN205908442U (en) | Ball formula valve assembly structure | |
| CN203742540U (en) | Hydraulic grading hoop device easy to drill | |
| CN205297418U (en) | Oil draining anchoring device of oil pipe | |
| CN205478233U (en) | Pressure driven butterfly piece piston pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |