CN106401527A - Well washing leakage and loss control device - Google Patents
Well washing leakage and loss control device Download PDFInfo
- Publication number
- CN106401527A CN106401527A CN201610859696.2A CN201610859696A CN106401527A CN 106401527 A CN106401527 A CN 106401527A CN 201610859696 A CN201610859696 A CN 201610859696A CN 106401527 A CN106401527 A CN 106401527A
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- China
- Prior art keywords
- valve element
- control device
- well
- cylinder
- valve seat
- Prior art date
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Links
- 238000005406 washing Methods 0.000 title abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 230000005484 gravity Effects 0.000 claims abstract description 16
- 238000011010 flushing procedure Methods 0.000 claims description 48
- 239000003129 oil well Substances 0.000 claims description 25
- 230000008602 contraction Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 4
- 238000001727 in vivo Methods 0.000 claims 1
- 210000003205 muscle Anatomy 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 27
- 239000001993 wax Substances 0.000 description 12
- 239000010779 crude oil Substances 0.000 description 7
- 230000008021 deposition Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000012188 paraffin wax Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Lift Valve (AREA)
Abstract
The invention provides a well washing leakage and loss control device. The well washing leakage and loss control device comprises a first barrel body, a valve element, a valve seat and a limiting portion. The first barrel body is provided with a first connection portion and a second connection portion which back against each other; the first connection portion is used for being connected with an output opening and provided with a liquid inlet; the second connection portion is provided with a liquid outlet; and the first barrel body is internally provided with a through channel communicating with the liquid inlet. The valve element is movably arranged in the through channel. The valve seat is fixed into the first barrel body and matched with the valve element. The limiting portion is fixed into the first barrel body. The valve element has preset gravity. Under the action of the preset gravity, the valve element is in contact with the valve seat. When indraft force is applied to the valve element, the valve element moves in the direction backing against the valve seat and abuts against the limiting portion. By means of the well washing leakage and loss control device, the situation that well washing fluid in a production tubular column enters an oil reservoir due to leakage and loss can be prevented, and oil can be extracted on the premise that the production tubular column is not lifted out.
Description
Technical field
The present invention relates to technical field of petroleum extraction, more particularly, to a kind of well-flushing leakage control device.
Background technology
During oil and gas development, the oil property such as oil reservoir paraffin content height, the high and low freezing point of wax precipitation temperature all may result in production
During wax deposition phenomenon occur, production string, flow string in process of production all easily occur wax deposition phenomenon.Oil well paraffinication,
Oil ＆ Gas Productivity, blocking oil gas tubing string, the production accident such as lifting pump wax card can be affected, therefore need to carry out effective Paraffin Removal and arrange
Apply.Under the conditions of prior art, wax control measure is various, but is that the most frequently used Oil/gas Well is prevented by heating power mode regular Paraffin Removal technology
One of wax measure.
In prior art, heating power mode regular Paraffin Removal technology is that flushing fluid circulates to remove internal surface of sleeve pipe in sleeve pipe
The wax stone of attachment and the wax stone to remove flow string and outer defeated pipe string internal wall attachment that flushing fluid circulates in flow string
Technology.
Flow string of the prior art generally comprises the oil pipe being sequentially connected from top to bottom, oil well pump, screen casing, packing
Device.When carrying out well-flushing, inject flushing fluid from the oil jacket annular space on top, the oil jacket annular space by bottom is insulated by packer,
So flushing fluid is flowed in flow string by screen casing, and by the opening access wall bottom of this flow string lower end.When shaft bottom
Oil reservoir is under-voltage when leading to lost circulation, the wax stone thawing that during thermal well flushing, top tubing string adhere to by the flushing fluid of heat, with
Lost circulation enters oil reservoir and can not effectively return out, and when lifting when again driving a well, wax crystal is being given birth to oil well liquid-producing again again
Produce and separate out wax deposition on tubing string, thus cause that oil well cleanup efficiency is low, frequent well-flushing and frequent wax deposition.So in order to prevent flushing fluid
Leakage enters oil reservoir, can connect plug in the bottom of this tubing string, but this mode is after well-flushing, because the bottom of tubing string is by silk
Blocked, thus crude oil be difficult to by this opening flow into oil well pump suction inlet in, so in order to recovered the oil it is necessary to incited somebody to action
Plug takes out, but so needs again to rise out and running string, thus extending the activity duration, reduces working performance.
Content of the invention
It is an object of the invention to provide a kind of lost circulation that can prevent in flow string enters oil reservoir, again can be not
The well-flushing leakage control device being recovered the oil on the premise of acting flow string.
The above-mentioned purpose of the present invention can be realized using following technical proposal：Control device missed by a kind of well-flushing, described washes
Leakage is lost control device and is used for connecting the flow string with delivery outlet, and described flow string includes oil well pump, described oil well pump
Suction inlet be connected with described delivery outlet；Described suction inlet can produce inhalation power；Described well-flushing leakage control device includes：Tool
Have back to first connecting portion and second connecting portion the first cylinder；Described first connecting portion is used for being connected with described delivery outlet
Connect；It is provided with inlet in described first connecting portion；It is provided with liquid outlet in described second connecting portion；Set in described first cylinder
It is equipped with the through channel being connected with described inlet；It is movably arranged at the valve element in described through channel；It is fixed on institute
State the valve seat matching in the first cylinder and with described valve element；It is fixed on the limiting section in described first cylinder；Described valve element tool
There is predetermined gravity；Described valve element is contacted with described valve seat under described predetermined action of gravity；When acting on described valve element
When stating inhalation power, described valve element is deviated from described valve seat and moves and leant with described limiting section.
As one kind preferred embodiment, described valve element is hollow structure, so that described inhalation power is less than predetermined value.
As one kind preferred embodiment, it includes：Second cylinder, the outer wall of described second cylinder with described first
The inwall of body engages, and on the inwall of described second cylinder, circumference is arranged at intervals with multiple raised ribs, and described raised ribs radial direction is prolonged
Stretch and be formed with described limiting section.
As one kind preferred embodiment, the plurality of raised ribs circumference is uniformly arranged on the inwall of described second cylinder
On.
As one kind preferred embodiment, described first cylinder has along the direction internal diameter near described first connecting portion
The first contraction flow region reducing, described second cylinder pushes against between described first contraction flow region and described valve seat.
As one kind preferred embodiment, described raised ribs are axially extending is formed with righting portion, and described righting portion is fixed
It is connected to described limiting section and is located between described limiting section and described valve seat, described righting portion has back to described second cylinder
Righting face, described righting face can be contacted with the periphery of described valve element.
As one kind preferred embodiment, described limiting section has the first extension extending radially beyond described righting face
End.
As one kind preferred embodiment, described valve element is tubular.
As one kind preferred embodiment, described valve seat is ring-type, and the valve seat of described ring-type has and extends radially beyond
Second elongated end in described righting face.
As one kind preferred embodiment, described second connecting portion has along along the direction away from described first connecting portion
The second contraction flow region that footpath reduces.
The beneficial effect that control device missed by a kind of well-flushing that the present invention provides is：A kind of well-flushing leakage that the present invention provides
Control device, during well-flushing, valve element is contacted with valve seat under predetermined action of gravity, therefore when flushing fluid passes through first connecting portion
When flow string flows in through channel, flushing fluid cannot flow out inlet from liquid outlet, so as to prevent lost circulation
Enter oil reservoir.After the inhalation power producing when oil well pump is pumped acts on valve element, valve element deviates from valve seat and moves and and limiting section
Lean, thus valve element can be separated with valve seat and limited, the now crude oil of energy on the premise of not playing out flow string automatically
Through channel can be flowed through from liquid outlet and flow in oil well pump, so as to be recovered the oil on the premise of not playing out flow string.This
Invention achieves provides a kind of lost circulation that can prevent in flow string to enter oil reservoir, can not play out flow string again
On the premise of the well-flushing that recovered the oil miss the purpose of control device.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, will make to required in embodiment description below
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is structural representation when one embodiment of the present invention valve element is contacted with valve seat；
Fig. 2 is the sectional view in Fig. 1 along line A-A；
Fig. 3 is structural representation when one embodiment of the present invention valve element is separated with valve seat.
Specific embodiment
Below in conjunction with the accompanying drawing in the application embodiment, the technical scheme in the application embodiment is carried out clearly
Chu, it is fully described by it is clear that described embodiment is only a part of embodiment of the application, rather than whole realities
Apply mode.Based on the embodiment in the application, those of ordinary skill in the art institute under the premise of not making creative work
The every other embodiment obtaining, broadly falls into the scope of the application protection.
Refer to Fig. 1, Fig. 2, Fig. 3, the present invention provides a kind of well-flushing to miss control device, and control device missed by described well-flushing
For connecting, there is the flow string of delivery outlet, described flow string includes oil well pump, the suction inlet of described oil well pump with described
Delivery outlet is connected；Described suction inlet can produce inhalation power；Described well-flushing leakage control device includes：Have back to first
Connecting portion 13 and the first cylinder 11 of second connecting portion 15；Described first connecting portion 13 is used for being connected with described delivery outlet；Institute
State and inlet 17 is provided with first connecting portion 13；It is provided with liquid outlet 19 in described second connecting portion 15；Described first cylinder
It is provided with the through channel 21 being connected with described inlet 17 in 11；It is movably arranged at the valve in described through channel 21
Core 23；It is fixed on the valve seat 31 matching in described first cylinder 11 and with described valve element 23；It is fixed on described first cylinder 11
Interior limiting section 33；Described valve element 23 has predetermined gravity；Described valve element 23 under described predetermined action of gravity with described valve seat
31 contact；When on described valve element 23, effect has described inhalation power, described valve element 23 deviate from described valve seat 31 mobile and with institute
State limiting section 33 to lean.
A kind of well-flushing leakage control device that the present invention provides, as shown in figure 1, during well-flushing, valve element 23 is in predetermined gravity
Effect is lower to be contacted with valve seat 31, therefore when the inlet 17 that flushing fluid passes through first connecting portion 13 flows into insertion from flow string
When in passage 21, flushing fluid cannot flow out from liquid outlet 19；So as to prevent lost circulation from entering oil reservoir.
As shown in figure 3, after the inhalation power producing when oil well pump is pumped acts on valve element, valve element 23 deviates from valve seat 31 and moves
Move and lean with limiting section 33, thus valve element 23 can be separated with valve seat 31 on the premise of not playing out flow string automatically
And can be limited, now crude oil can flow through in through channel 21 inflow oil well pump from liquid outlet 19, so as to not play out production
Recovered the oil on the premise of tubing string.Present invention achieves providing a kind of lost circulation that can prevent in flow string to enter oil
Hide, the purpose of control device missed by the well-flushing that again can be recovered the oil on the premise of not playing out flow string.
As shown in figure 1, in the present embodiment, flow string has delivery outlet, thus the well-flushing liquid energy in flow string
Flowed out by this delivery outlet.This flow string includes oil well pump, and the suction inlet of this oil well pump is connected with delivery outlet, thus when suction
When entrance produces inhalation power, this inhalation power can be acted on valve element 23 by delivery outlet.During oil recovery, on the sucker rod of oil well pump
Move, therefore the suction inlet of oil well pump produces inhalation power.This first connecting portion 13 of this inhalation power is used for being connected with delivery outlet, permissible
So that the inlet 17 that the well-flushing liquid energy in one side flow string is passed through in first connecting portion 13 flows in through channel 21, separately
On the one hand, when suction inlet produces inhalation power, this inhalation power can act on valve element by the inlet 17 in first connecting portion 13
On 23.Second connecting portion 15 is used for being connected with the sand control screen of flow string bottom.
Valve element 23 is movably arranged in through channel 21, and therefore valve element 23 can move in through channel 21.Valve element
23 are contacted with valve seat 31, and the flushing fluid in through channel 21 when can stop well-flushing flows out from liquid outlet 19.Predetermined gravity can
To be greater than the power of the buoyancy to valve element 23 for the shaft bottom crude oil so that valve element 23 can in the presence of this predetermined gravity with valve seat 31 phase
Contact.
During oil recovery, after the suction inlet of oil well pump produces inhalation power, valve element 23 is also subject to this inhalation power, and this inhalation power can make
It is mobile that valve element 23 deviates from valve seat 31.It is fixedly installed valve seat 31 in first cylinder 11.This be fixedly installed can be integrally formed, spiral shell
Bolt is fixed, screw is fixed, be screwed, be welded and fixed.This valve seat 31 is fixed on the first cylinder 11 by O-shaped mounting ring 41,
Thus being conducive to the installation and removal of valve seat 31.This valve seat 31 and valve element 23 match, thus when valve element 23 is connected with valve seat 31
When tactile, through channel 21 mutually can be separated with liquid outlet 19, so as to stop flushing fluid from flowing out from liquid outlet 19, so as to prevent from washing
Well liquid leakage enters oil reservoir.This valve element 23 can be spherical or tubular.When valve element 23 is spherical, this valve seat 31 has
There is the valve face of cone, thus this spherical valve element 23 can match with the valve face of cone.
Limiting section 33 is fixed in the first cylinder 11.This limiting section 33 is spacing for carrying out to valve element 23；So that working as valve
When core 23 and limiting section 33 lean, this limiting section 33 can limit the movement of valve element 23, thus avoiding valve element 23 blocking inlet
17 or from inlet 17 flow out the first cylinder 11.
In one embodiment, valve element 23 is hollow structure, so that inhalation power is less than predetermined value.This predetermined value is got over
Little, more can reduce the suction resistance of the suction inlet of oil well pump.This valve element 23 is hollow structure, can reduce the weight of valve element 23.
After the suction inlet of oil well pump produces inhalation power, the buoyancy that the power that valve element 23 is subject to is predetermined gravity, shaft bottom crude oil produces to it
And inhalation power, buoyancy with suck force direction identical, gravity is in opposite direction with buoyancy.The predetermined gravity of this valve element 23 is less, should
Difference between predetermined gravity and suffered buoyancy is i.e. less, so more can reduce the suction resistance of the suction inlet of oil well pump, because
This valve element 23 is hollow structure, it is possible to reduce the suction resistance of the suction inlet of oil well pump.
In one embodiment, the outer wall of the second cylinder 43 is engaged with the inwall of the first cylinder 11, the second cylinder 43
Inwall on circumference be arranged at intervals with multiple raised ribs 45, raised ribs 45 radially extend and are formed with limiting section 33.
In the present embodiment, raised ribs 45 radially extend, so as to lean with valve element 23, so as to carry out to valve element
Spacing.On the circumferentially disposed inwall in the second cylinder 43 of this raised ribs 45, thus raised ribs 45 can be to the diverse location of valve element 23
Carry out spacing, the fastness spacing to improve raised ribs 45.Raised ribs 45 are provided at circumferentially spaced on the inwall of the second cylinder 43,
Thus when valve element 23 is leant with limiting section 33, crude oil can be allowed between the raised ribs 45 of phase to circulate, thus crude oil can flow
Flow in oil well pump through through channel 21.
In one embodiment, multiple raised ribs 45 circumferences are uniformly arranged on the inwall of the second cylinder 43.
In the present embodiment, multiple raised ribs 45 circumferences are uniformly arranged the limit that can ensure that raised ribs 45 to limiting section 33
The stability of position.
In one embodiment, the first cylinder 11 has first reducing along the direction internal diameter near first connecting portion 13
Contraction flow region 47, the second cylinder 43 pushes against between the first contraction flow region 47 and valve seat 31.
In the present embodiment, the first contraction flow region 47 is used for making flowing by the first contraction flow region 47 from inlet 17 when flushing fluid
When entering through channel 21, increase the flow velocity of flushing fluid, so as to increase the active force acting on valve element 23, so that accelerating valve
The speed that core 23 is contacted with valve seat 31, enters oil reservoir so as to be better protected from lost circulation.This second cylinder 43 pushes against
Between the first contraction flow region 47 and valve seat 31, the second cylinder 43 and the installation and removal of the first cylinder 11 can be facilitated.
In one embodiment, raised ribs 45 are axially extending is formed with righting portion 37, and righting portion 37 is fixedly connected on limit
Position portion 33 and be located between limiting section 33 and valve seat 31, righting portion 37 has the righting face 39 back to the second cylinder 43, righting face
39 can be contacted with the periphery of valve element 23.
In the present embodiment, righting portion 37 is used for carrying out righting to valve element 23, so that when valve element 23 deviates from valve seat 31
When mobile, valve element 23 is mobile along righting face 39, thus with raised ribs 45 on limiting section 33 against when valve element 23 is near valve seat
When 31 direction is mobile, valve element 23 is mobile along righting face 39, thus with valve seat 31 against therefore this righting portion 37 is by valve element
The path of 23 movements is limited, and on the one hand can ensure that valve element 23 can rapidly be coordinated with valve seat 31, with can be preferably
Prevent lost circulation from entering oil reservoir；On the other hand can ensure that valve element 23 can rapidly be leant with limiting section 33, to limit
The movement of valve element 23.
In one embodiment, limiting section 33 has first elongated end 51 in the righting face of extending radially beyond 39.
In the present embodiment, this first elongated end 51 extends radially beyond righting face 39, thus when valve element 23 is along righting
When face 39 is mobile, valve element 23 can be spacing by the first elongated end 51, the purpose spacing to valve element 23 to realize limiting section 33.
In one embodiment, valve element 23 is tubular.
In the present embodiment, the valve element 23 of this tubular is when contacting with valve seat 31, the end of valve element 23 of tubular with
It is face seal between valve seat 31, so as to strengthen the sealing to valve seat 31 for the valve element 23.Valve element 23 is cylindrical in shape, with respect in spherical
For, the area that its periphery is contacted can be increased with righting face 39, so as to be conducive to valve element 23 along the movement in righting face 39.
In one embodiment, valve seat 31 is ring-type, and the valve seat 31 of ring-type has the righting face of extending radially beyond 39
Second elongated end 53.
In the present embodiment, this second elongated end 53 extends radially beyond righting face 39, thus when valve element 23 is along righting
Face 39 is mobile, and to when contacting with valve seat 31, valve element 23 can be subject to stopping of the second elongated end 53, thus valve element 23 energy and valve seat
31 contact.
In one embodiment, it includes：Second connecting portion 15 has along the direction internal diameter away from first connecting portion 13
The second contraction flow region 49 reducing.
In the present embodiment, this second connecting portion 15 can make internal diameter reduce by the second contraction flow region 49, with oily with outside
Pipe is docked.It is connected by pin 57 between this second connecting portion 15 and the first cylinder 11, so as to facilitate the first cylinder
11 inner spools 23, the second cylinder 43, the installation and removal of valve seat 31.It is provided between this second connecting portion 15 and the first cylinder 11
O-ring seal 59, to prevent the leakage of fluid.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouching
State, the many embodiments outside the example being provided and many applications will be all aobvious and easy for a person skilled in the art
See.Therefore, the scope of this teaching should not determine with reference to foregoing description, but should with reference to aforementioned claim and this
The four corner of the equivalent that a little claim are had is determining.For comprehensive purpose, all articles and reference are included specially
The disclosure of profit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in aforementioned claim
Any aspect is not intended to abandon this body matter, also should not be considered as applicant this theme is not thought of as disclosed
A part for application theme.
Claims (10)
1. control device missed by a kind of well-flushing, and described well-flushing is missed control device and is used for connecting the flow string with delivery outlet,
Described flow string includes oil well pump, and the suction inlet of described oil well pump is connected with described delivery outlet；Described suction inlet can produce
Inhalation power；It is characterized in that, described well-flushing leakage control device includes：
Have back to first connecting portion and second connecting portion the first cylinder；Described first connecting portion is used for and described output
Mouth is connected；It is provided with inlet in described first connecting portion；It is provided with liquid outlet in described second connecting portion；Described first
It is provided with the through channel being connected with described inlet in vivo；
It is movably arranged at the valve element in described through channel；
It is fixed on the valve seat matching in described first cylinder and with described valve element；
It is fixed on the limiting section in described first cylinder；
Described valve element has predetermined gravity；Described valve element is contacted with described valve seat under described predetermined action of gravity；
When on described valve element, effect has described inhalation power, described valve element is deviated from described valve seat and moves and offseted with described limiting section
Lean on.
2. well-flushing according to claim 1 leakage control device it is characterised in that：Described valve element is hollow structure, so that
Described inhalation power is less than predetermined value.
3. well-flushing leakage control device according to claim 1 is it is characterised in that it includes：Second cylinder, described second
The outer wall of cylinder is engaged with the inwall of described first cylinder, on the inwall of described second cylinder circumference be arranged at intervals with multiple convex
Play muscle, described raised ribs radially extend and are formed with described limiting section.
4. well-flushing according to claim 3 leakage control device it is characterised in that：The plurality of raised ribs circumference uniformly sets
It is placed on the inwall of described second cylinder.
5. well-flushing according to claim 3 leakage control device it is characterised in that：Described first cylinder has along near institute
State the first contraction flow region that the direction internal diameter of first connecting portion reduces, described second cylinder pushes against in described first contraction flow region and described
Between valve seat.
6. well-flushing according to claim 3 leakage control device it is characterised in that：Described raised ribs are axially extending to be formed with
Righting portion, described righting portion is fixedly connected on described limiting section and is located between described limiting section and described valve seat, described righting
Portion has the righting face back to described second cylinder, and described righting face can be contacted with the periphery of described valve element.
7. well-flushing according to claim 6 leakage control device it is characterised in that：Described limiting section have radially extend super
Go out first elongated end in described righting face.
8. well-flushing according to claim 6 leakage control device it is characterised in that：Described valve element is tubular.
9. well-flushing according to claim 8 leakage control device it is characterised in that：Described valve seat is ring-type, described ring-type
Valve seat there is the second elongated end extending radially beyond described righting face.
10. well-flushing according to claim 1 leakage control device it is characterised in that：Described second connecting portion has along far
The second contraction flow region reducing from the direction internal diameter of described first connecting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859696.2A CN106401527B (en) | 2016-09-28 | 2016-09-28 | Well-flushing misses control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859696.2A CN106401527B (en) | 2016-09-28 | 2016-09-28 | Well-flushing misses control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106401527A true CN106401527A (en) | 2017-02-15 |
| CN106401527B CN106401527B (en) | 2019-01-18 |
Family
ID=58015770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610859696.2A Active CN106401527B (en) | 2016-09-28 | 2016-09-28 | Well-flushing misses control device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106401527B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356540A (en) * | 2018-11-30 | 2019-02-19 | 长江大学 | A kind of cyclic cleaning valve |
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|---|---|
| CN106401527B (en) | 2019-01-18 |
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