CN206860145U - A kind of underground switching valve - Google Patents
A kind of underground switching valve Download PDFInfo
- Publication number
- CN206860145U CN206860145U CN201720639284.8U CN201720639284U CN206860145U CN 206860145 U CN206860145 U CN 206860145U CN 201720639284 U CN201720639284 U CN 201720639284U CN 206860145 U CN206860145 U CN 206860145U
- Authority
- CN
- China
- Prior art keywords
- valve seat
- outer barrel
- pushing cylinder
- retaining ring
- 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
It the utility model is related to a kind of underground switching valve, top connection and outer barrel install piston with being threadedly coupled between outer barrel；Retaining ring is installed in one end of top connection, and with top connection with being threadedly coupled；Contacted in outer barrel built with pushing cylinder, the big end of pushing cylinder with top connection retaining ring, small end stretches into valve seat endoporus, and pushing cylinder small end external diameter is equipped with spring, spring one end and the big end in contact of pushing cylinder, the other end and valve seat end contact；There is step in outer barrel, valve seat is in outer barrel, and one end contacts with step in outer barrel, and with the outer barrel other end with being threadedly coupled, end face contacts with valve seat other end and fixes valve seat for lower contact；Valve plate is connected with valve seat, and torsion spring is fixed on valve seat and valve plate by connecting pin through torsion spring, and one end is fixed on valve seat, and the other end is fixed on valve plate, valve plate is in normal off status.This switch valve solve change top tubing string well control risk problem, be mainly used in oil-gas reservoir full-bore segmentation acid fracturing after change tubing string when interior blowout prevention effect.
Description
Technical field
The design and manufacturing technology field of equipment in being transformed the invention belongs to well production increment, more particularly to a kind of underground
Switch valve, be mainly used in oil-gas reservoir full-bore segmentation acid fracturing after change tubing string when interior blowout prevention effect.
Background technology
In oil well barefoot completion operation, in order to improve oil and gas production and recovery ratio, for carbonate rock geologic horizon, often
Using the reservoir reconstruction means of segmentation acid fracturing.When carrying out acid fracturing frequently with larger latus rectum oil pipe to reduce pumping liquid when
String friction, but when producing in the later stage need not use such big orifice oil pipe can meet demand, with big orifice oil pipe
Produced, one side cost is higher than small latus rectum oil pipe, on the other hand in the case of production capacity and latus rectum are unmatched, when production capacity needs
Ask and bigger slippage effect is had when being less than production tube latus rectum, reduce well yield.
Because bottom tubing string is linked up with stratum and can not closed in acid fracturing, now changing top tubing string has very big well
Risk is controlled, so needing one kind not influence acid fracturing pitching operation, lower tube internal channel is closed when changing tubing string, has changed tubing string
Pipe internal channel can be opened completely afterwards does not influence the instrument of later stage production.
The content of the invention
The purpose of this utility model is：Acid fracturing operation is not influenceed in acid fracturing, acid fracturing heel closes lower tube when changing tubing string
Post passage, gas channel is opened after tieback oil pipe not to be influenceed normally to produce.
Solving the technical scheme that above-mentioned technical problem uses is：A kind of underground switching valve, including meter top connection, outer barrel, work
Plug, retaining ring, retaining ring back-up ring, pushing cylinder, spring, valve seat, connecting pin, torsion spring, valve plate and lower contact, top connection and outer barrel spiral shell
Line connects, and has annular gap to install piston between top connection and outer barrel, piston can be up and down in gap；Do not have in top connection
Female one end has step to install retaining ring, has retaining ring back-up ring, with being threadedly coupled, retaining ring to be kept off with top connection in platform
In rank；Rear retaining ring and retaining ring back-up ring are assembled in piston inner diameter；In outer barrel built with pushing cylinder, the big end of pushing cylinder and top connection
Retaining ring end contact is filled, small end stretches into valve seat endoporus, and pushing cylinder small end external diameter is equipped with spring, spring one end and the big end stand rank of pushing cylinder
Contact, the other end and valve seat end contact are in compressive state, make pushing cylinder all the time with piston contact；There are step, valve seat in outer barrel
In outer barrel, one end contacts with step in outer barrel, and lower contact and the outer barrel other end are with being threadedly coupled, end face and the valve seat other end
Valve seat is fixed in face contact；The valve plate is connected by connecting pin with valve seat, and torsion spring is fixed on valve seat by connecting pin through torsion spring
Between valve plate, one end is fixed on valve seat, and the other end is fixed on valve plate, valve plate is in normal off status.
The beneficial effects of the utility model：This underground switching valve is solved after completion tubular column acid fracturing because tubing string and stratum connect
Logical, changing top tubing string has the technical problem of larger well control risk, and opens oil pipe internal channel completely after tieback string, no
Influence later stage production.
Brief description of the drawings
The utility model is further described below in conjunction with the accompanying drawings.
Accompanying drawing 1 is the front view structure sectional view of the present invention；Accompanying drawing 2 is Fig. 1 A-A sectional views.
Embodiment
Interior jet-preventing tool during tubing string is changed after embodiment, a kind of segmentation acid fracturing for oil-gas reservoir full-bore, such as Fig. 1 and figure
Shown in 2, including meter top connection 1, outer barrel 2, piston 3, retaining ring 4, retaining ring back-up ring 5, pushing cylinder 6, spring 7, valve seat 8, connecting pin
9th, torsion spring 10, valve plate 11 and lower contact 12, top connection 1, with being threadedly coupled, have annular with outer barrel 2 between top connection 1 and outer barrel 2
Piston 3 is installed in gap, and piston 3 can be up and down in gap；Do not have female one end to have step that retaining is installed in top connection 1
Ring 4, there is retaining ring back-up ring 5, with being threadedly coupled, retaining ring 4 to be kept off with top connection 1 in step；Rear retaining ring 4 is assembled with stopping
Ring back-up ring 5 is moved back in the internal diameter of piston 3；Fill the end face of retaining ring 4 built with pushing cylinder 6, the end greatly of pushing cylinder 6 in outer barrel 2 with top connection 1 and connect
Touch, small end stretches into the endoporus of valve seat 8, and the small end external diameter of pushing cylinder 6 is equipped with spring 7, and the one end of spring 7 contacts with the big end stand rank of pushing cylinder 6, another
End is in compressive state with the end contact of valve seat 8, pushing cylinder 6 is contacted all the time with piston 3；There is step in outer barrel 2, valve seat 8 is mounted in
In outer barrel 2, one end contacts with step in outer barrel 2, and with the other end of outer barrel 2 with being threadedly coupled, end face and valve seat 8 are another for lower contact 12
End contact fixes valve seat 8；The valve plate 11 is connected by connecting pin 9 with valve seat 8, and connecting pin 9 passes through torsion spring 10 by torsion spring
10 are fixed between valve seat 8 and valve plate 11, and the one end of torsion spring 10 is fixed on valve seat 8, and the other end is fixed on valve plate 11, makes valve plate
11 are in normal off status.During entering well, valve plate is in normal off status, and tube fluid opens valve plate during direct circulation, does not circulate
Or valve plate is closed during reacting cycle, latus rectum is substantially consistent with oil pipe when valve plate is opened, and does not influence acid fracturing and pitching operation.
After the completion of acid fracturing operation, valve plate is closed top tubing string and given up out, and weighing apparatus is tied in pipe after the thinner oil pipe of tieback
The pressure above and below weighing apparatus valve plate is flattened, then annular space is suppressed, and pressure is acted on piston by the pressure transmission hole of outer barrel, and descent of piston pushes away
Dynamic promote pushes valve plate open, opens valve plate completely when pushing cylinder comes downwards to, and the back stop slot on piston is moved to retaining ring position, only
Move back ring and open and be stuck in piston is locked in groove, remain normally open from this instrument, do not influence later stage production.
Claims (1)
1. a kind of underground switching valve, including meter top connection（1）, outer barrel（2）, piston（3）, retaining ring（4）, retaining ring back-up ring（5）、
Pushing cylinder（6）, spring（7）, valve seat（8）, connecting pin（9）, torsion spring（10）, valve plate（11）And lower contact（12）, it is characterised in that：On
Joint（1）With outer barrel（2）With threaded connection, in top connection（1）And outer barrel（2）Between have annular gap install piston（3）, piston
（3）Can be up and down in gap；In top connection（1）Do not have female one end to have step that retaining ring is installed（4）, there is retaining ring
Back-up ring（5）With top connection（1）With threaded connection, by retaining ring（4）Gear is in step；Assemble rear retaining ring（4）With retaining ring
Back-up ring（5）In piston（3）In internal diameter；In outer barrel（2）Built with pushing cylinder（6）, pushing cylinder（6）Big end and top connection（1）Fill retaining ring
（4）End contact, small end stretch into valve seat（8）Endoporus, pushing cylinder（6）Small end external diameter is equipped with spring（7）, spring（7）One end and pushing cylinder
（6）Big end stand rank contact, the other end and valve seat（8）End contact is in compressive state, makes pushing cylinder（6）All the time with piston（3）Connect
Touch；Outer barrel（2）Inside there are step, valve seat（8）Mounted in outer barrel（2）It is interior, one end and outer barrel（2）Interior step contact, lower contact（12）With
Outer barrel（2）The other end is threadedly coupled, end face and valve seat（8）Other end is contacted valve seat（8）It is fixed；The valve plate（11）It is logical
Cross connecting pin（9）With valve seat（8）Connection, connecting pin（9）Through torsion spring（10）By torsion spring（10）It is fixed on valve seat（8）With valve plate
（11）Between, torsion spring（10）One end is fixed on valve seat（8）On, the other end is fixed on valve plate（11）On, make valve plate（11）In normal
Off status.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720639284.8U CN206860145U (en) | 2017-06-05 | 2017-06-05 | A kind of underground switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720639284.8U CN206860145U (en) | 2017-06-05 | 2017-06-05 | A kind of underground switching valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206860145U true CN206860145U (en) | 2018-01-09 |
Family
ID=60830332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720639284.8U Expired - Fee Related CN206860145U (en) | 2017-06-05 | 2017-06-05 | A kind of underground switching valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206860145U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206509A (en) * | 2019-05-24 | 2019-09-06 | 中国地质科学院地质力学研究所 | A kind of water level differential pressure control valve |
| CN110735615A (en) * | 2018-07-19 | 2020-01-31 | 中国石油化工股份有限公司 | Two-way anti-back-flow valve |
| CN114837614A (en) * | 2022-05-30 | 2022-08-02 | 东北石油大学 | Pressure control valve in underground oil pipe column |
-
2017
- 2017-06-05 CN CN201720639284.8U patent/CN206860145U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735615A (en) * | 2018-07-19 | 2020-01-31 | 中国石油化工股份有限公司 | Two-way anti-back-flow valve |
| CN110206509A (en) * | 2019-05-24 | 2019-09-06 | 中国地质科学院地质力学研究所 | A kind of water level differential pressure control valve |
| CN110206509B (en) * | 2019-05-24 | 2022-05-27 | 中国地质科学院地质力学研究所 | Water level differential pressure control valve |
| CN114837614A (en) * | 2022-05-30 | 2022-08-02 | 东北石油大学 | Pressure control valve in underground oil pipe column |
| CN114837614B (en) * | 2022-05-30 | 2023-11-03 | 东北石油大学 | Pressure control valve in underground oil pipe string |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180109 |