CN206830131U - A kind of water injection well sand setting constant pressure check valve - Google Patents
A kind of water injection well sand setting constant pressure check valve Download PDFInfo
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- CN206830131U CN206830131U CN201720358066.7U CN201720358066U CN206830131U CN 206830131 U CN206830131 U CN 206830131U CN 201720358066 U CN201720358066 U CN 201720358066U CN 206830131 U CN206830131 U CN 206830131U
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Abstract
The utility model discloses a kind of water injection well sand setting constant pressure check valve, belong to oil production equipment field.The ball-and-seat includes：Well-flushing valve body, the well washing hole of radial direction and the sand setting through hole of axial direction are respectively arranged with the side wall of well-flushing valve body, middle part is provided with the blind hole connected with well washing hole.Tubulose connector, the top of well-flushing valve body is arranged on, and be connected with blind hole.Valve seat, it is arranged on the top of tubulose connector.Reverse plug, it is arranged in the inner chamber of tubulose connector, top passes through valve seat, and bottom is fixed in blind hole by shear pin.Block, cover are provided with fluid hole on the top of valve seat, side wall.Spring, it is arranged in the inner chamber of block, with being connected at the top of block, the valve ball that bottom is more than valve seat bore with diameter is connected for upper end.Tubular valve body, it is arranged on above well-flushing valve body, and covers mounted in block, the outside of tubulose connector, inner chamber is connected with sand setting through hole.The ball-and-seat can avoid packer from shifting to an earlier date the blocking of setting and fluid hole.
Description
Technical field
Oil production equipment field is the utility model is related to, more particularly to a kind of water injection well sand setting constant pressure check valve.
Background technology
, it is necessary to which packing between different oil reservoirs in water injection well is opened when carrying out seperated layer water injection operation to oil field using water injection well,
To carry out single water injection work to different oil reservoirs., it is necessary to ensure the envelope of water injection string bottom when being insulated to different oil reservoirs
Close, meanwhile, in order to meet the reverse well-flushing requirement of water injection well, it is also necessary to flushing fluid is flowed into water injection string from the bottom to top
It is interior, to carry out reverse clean-out service.Therefore it provides one kind can keep closing in packer set, and in reverse well-flushing
It is very necessary to allow the device of liquid one-way flow from the bottom to top in water injection string.
Prior art provides a kind of ball-and-seat, including：Hollow valve body, the bottom of valve body are provided with and body cavity phase
The inlet opening of connection, top are provided with the fluid hole being connected with body cavity.Spring and valve ball are provided with the inner chamber of valve body,
The top of spring and the upper wall of body cavity are connected, and bottom is connected with valve ball.When spring is in relaxation state, valve ball can block
Inlet opening.In use, ball-and-seat to be arranged on to the bottom of water injection string, inlet opening is blocked by valve ball, ensures water injection string bottom
The closing in portion so that the packer in water injection well can carry out it is setting.When needing to carry out reverse clean-out service, flushing fluid is being noted
Flowed from the bottom to top in water pipe post, when flowing at inlet opening, because spring can be compressed, therefore flushing fluid can rush valve ball
Rise, so that inlet opening is opened, after flushing fluid enters inlet opening, flow through the inner chamber of valve body, then flowed out through fluid hole, subsequently into
Continue in water injection string to moving uphole, complete the reverse clean-out service of water injection well.
Designer has found that prior art at least has following technical problem：
After the ball-and-seat that prior art is provided is arranged on the bottom of water injection string, by water injection string tripping in water injection well
During, the liquid in pit shaft can be entered in water injection string by ball-and-seat, cause the pressure in water injection string to increase.In water filling
When tubing string does not transfer to desired depth also, the pressure in water injection string has just reached the pressure needed for packer set in advance,
Make packer setting in advance, cause water injection string decentralization failure, oil reservoir packing improper, influence the progress of seperated layer water injection operation.Separately
Outside, the sand grains in water injection string is easily deposited on the top of ball-and-seat, blocks the fluid hole of ball-and-seat, causes ball-and-seat to lose
Effect.
Utility model content
The utility model embodiment technical problem to be solved is, there is provided one kind can avoid packer from shifting to an earlier date seat
The water injection well sand setting constant pressure check valve that envelope and fluid hole block, concrete technical scheme are as follows：
The utility model embodiment provides a kind of water injection well sand setting constant pressure check valve, and the ball-and-seat includes：
Well-flushing valve body, the well washing hole of radial direction and the sand setting through hole of axial direction are respectively arranged with the side wall of the well-flushing valve body,
Middle part is provided with the blind hole connected with the well washing hole.
Tubulose connector, the top of the well-flushing valve body is arranged on, and is connected with the blind hole.
Valve seat, it is arranged on the top of the tubulose connector.
Reverse plug, it is arranged in the inner chamber of the tubulose connector, top passes through the valve seat, and bottom is consolidated by shear pin
It is scheduled in the blind hole.
Block, cover are provided with fluid hole on the top of the valve seat, side wall.
Spring, it is arranged in the inner chamber of the block, with being connected at the top of the block, lower end is more than described with diameter for upper end
The valve ball connection of valve seat bore.
Tubular valve body, be arranged on above the well-flushing valve body, and cover mounted in the block, the tubulose connector it is outer
Portion, inner chamber are connected with the sand setting through hole.
Specifically, preferably, the cross section of the sand setting through hole is semicircular arc.
Specifically, preferably, the lower inner wall of the tubular valve body and the external wall of upper portion screw thread of the well-flushing valve body connect
Connect；And it is provided with the first sealing ring between the tubular valve body and the well-flushing valve body.
Specifically, preferably, the bottom of the tubulose connector is inserted in the blind hole, and with the side wall of the blind hole
Threaded connection；And it is provided with the second sealing ring between the tubulose connector and the blind hole.
Specifically, preferably, described be reversely provided with the 3rd sealing ring between plug and the tubulose connector.
Specifically, preferably, the top of the block is arc-shaped.
Specifically, preferably, the ball-and-seat also includes：Centralizer body, the centralizer body include head and righting portion；Institute
State righting portion to be set in the spring, the upper surface on the head is connected with the lower end of the spring, lower surface and the valve
Ball offsets.
Specifically, preferably, being provided with the lower surface on the head recessed with the arc being engaged at the top of the valve ball
Groove；It is described to be reversely provided with the arc groove being engaged with the valve ball bottom on the upper surface of plug.
Specifically, preferably, the top of the reversely plug is provided with a circle recessed step radially inward.
Specifically, preferably, the top of the tubular valve body is provided with upper binding head；The bottom of the well-flushing valve body is set
It is equipped with lower union joint.
The beneficial effect brought of technical scheme that utility model embodiment provides is：
The water injection well sand setting constant pressure check valve that the utility model embodiment provides, when in use, the ball-and-seat is installed
The oil pipe with plug is installed in the bottom of water injection string, and in the bottom of ball-and-seat, to block sand setting through hole.Water injection string by
Gradually during tripping in water injection well, because reverse plug blocks blind hole, meanwhile, the oil pipe with plug seals the bottom of ball-and-seat
It is stifled, so that the bottom closing of water injection string, prevents the liquid in water injection well from entering in water injection string, makes the pressure in water injection string
Power remains constant, avoids the setting in advance of packer.Water injection string is transferred to desired depth, makes packer set.Seat
During envelope, the pressure in water injection string gradually increases, until shear pin is cut, so that reversely plug is fallen into blind hole, together
When valve ball fall into valve seat, to block valve seat, ensure being smoothed out for setting procedure.After the completion of setting, ball-and-seat by blind hole and
The intracavity inter-connection of well washing hole and water injection well.When needing to carry out reverse clean-out service, because reverse plug has fallen into blind hole
In, now the inner chamber of tubulose connector is connected with well washing hole by blind hole, and flushing fluid sequentially enters blind hole, pipe by well washing hole
The inner chamber of shape connector, the inner chamber of valve seat, and valve ball is washed open, flushing fluid flows through valve seat, then by the fluid hole stream in block
Enter tubular valve body, most enter afterwards through tubular valve body in water injection string, and continue to moving uphole, complete the reverse well-flushing of water injection well
Operation.In the process, if sand grains is fallen in water injection string, sand grains will lead to along the inner chamber of tubular valve body into sand setting
Hole, finally fall into the oil pipe with plug.Sand grains will not be accumulated in tubular valve body, so as to avoid the blocking of ball-and-seat.
The water injection well sand setting constant pressure check valve that the utility model embodiment provides, by setting blind hole on well-flushing valve body
And well washing hole, and reverse plug is set in blind hole, position of the reverse plug in blind hole is controlled by shear pin, enables ball-and-seat
It is enough that closing is kept in water injection string decentralization process, and be connected after packer set with water injection well, so as to avoid sealing
Every device shift to an earlier date it is setting on the basis of ensure being smoothed out for reverse well-flushing.By setting the heavy of axial direction in the side wall of well-flushing valve body
Sand through hole, and fluid hole is set in the side wall of block, sand grains is directly entered band by sand setting through hole under gravity stifled
The oil pipe of head, without entering fluid hole or being deposited in the inner chamber of tubular valve body, so as to avoid ball-and-seat from being blocked.It can be seen that
The water injection well sand setting constant pressure check valve that the utility model embodiment provides, packer can be effectively avoided to shift to an earlier date setting and go out liquid
Hole plug, and it is easy to use, it is easy to large-scale promotion application.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural representation for the water injection well sand setting constant pressure check valve that the utility model embodiment provides；
Fig. 2 is the cross-sectional view for the well-flushing valve body that the utility model embodiment provides.
Reference represents respectively：
1 well-flushing valve body,
101 well washing holes,
102 sand setting through holes,
103 blind holes,
2 tubulose connectors,
3 valve seats,
4 reverse plugs,
5 shear pins,
6 blocks,
601 fluid holes,
7 springs,
8 valve balls,
9 tubular valve bodies,
10 centralizer bodies,
11 upper binding heads,
12 lower union joints.
Embodiment
, below will be to the utility model embodiment party to make the purpose of this utility model, technical scheme and advantage clearer
Formula is described in further detail.
The utility model embodiment provides a kind of water injection well sand setting constant pressure check valve, as shown in Figure 1, the ball-and-seat
Including：Well-flushing valve body 1, the well washing hole 101 of radial direction and the sand setting through hole 102 of axial direction are respectively arranged with the side wall of well-flushing valve body 1,
Middle part is provided with the blind hole 103 connected with well washing hole 101.Tubulose connector 2, it is arranged on the top of well-flushing valve body 1, and and blind hole
103 are connected.Valve seat 3, it is arranged on the top of tubulose connector 2.Reverse plug 4, is arranged in the inner chamber of tubulose connector 2,
Top passes through valve seat 3, and bottom is fixed in blind hole 103 by shear pin 5.Block 6, cover are set on the top of valve seat 3, side wall
There is fluid hole 601.Spring 7, it is arranged in the inner chamber of block 6, upper end is connected with the top of block 6, and lower end is more than valve seat 3 with diameter
The valve ball 8 of internal diameter connects.Tubular valve body 9, be arranged on the top of well-flushing valve body 1, and cover mounted in block 6, tubulose connector 2 it is outer
Portion, inner chamber are connected with sand setting through hole 102.
The water injection well provided below with regard to the utility model embodiment is illustrated with the operation principle of sand setting constant pressure check valve：
When in use, the ball-and-seat is arranged on to the bottom of water injection string, and installed in the bottom of ball-and-seat with plug
Oil pipe, to block sand setting through hole 102.During the gradual tripping in water injection well of water injection string, because reverse plug 4 is by blind hole
103 block, meanwhile, the oil pipe with plug blocks the bottom of ball-and-seat, so that the bottom closing of water injection string, prevents water filling
Liquid in well enters in water injection string, the pressure in water injection string is remained constant, avoids the setting in advance of packer.
Water injection string is transferred to desired depth, makes packer set.In setting procedure, the pressure in water injection string is gradual
Increase, until shear pin 5 is cut, so that reversely plug 4 is fallen into blind hole 103, while valve ball 8 falls into valve seat 3, with plugging valve
Seat 3, ensures being smoothed out for setting procedure.
After the completion of setting, ball-and-seat passes through blind hole 103 and the intracavity inter-connection of well washing hole 101 and water injection well.When need into
During the reverse clean-out service of row, because reverse plug 4 has been fallen into blind hole 103, the now inner chamber of tubulose connector 2 and well washing hole
101 are connected by blind hole 103, and flushing fluid sequentially enters blind hole 103, the inner chamber of tubulose connector 2, valve by well washing hole 101
The inner chamber of seat 3, and valve ball 8 is washed open, flushing fluid flows through valve seat 3, then flows into tubular valve body by the fluid hole 601 in block 6
9, most enter afterwards through tubular valve body 9 in water injection string, and continue to moving uphole, complete the reverse clean-out service of water injection well.
In the process, if sand grains is fallen in water injection string, sand grains will enter sand setting along the inner chamber of tubular valve body 9
Through hole 102, finally falls into the oil pipe with plug.Sand grains will not be accumulated in tubular valve body 9, so as to avoid the stifled of ball-and-seat
Plug.
The water injection well sand setting constant pressure check valve that the utility model embodiment provides, it is blind by being set on well-flushing valve body 1
Hole 103 and well washing hole 101, and reverse plug 4 is set in blind hole 103, reverse plug 4 is controlled in blind hole 103 by shear pin 5
Position, enable ball-and-seat kept in water injection string decentralization process closing, and after packer set with water injection well phase
Connection, so as to avoid packer shift to an earlier date it is setting on the basis of ensure being smoothed out for reverse well-flushing.By in well-flushing valve body 1
Axial sand setting through hole 102 is set in side wall, and fluid hole 601 is set in the side wall of block 6, makes sand grains under gravity
The oil pipe with plug is directly entered by sand setting through hole 102, without entering fluid hole 601 or being deposited in tubular valve body 9
In chamber, so as to avoid ball-and-seat from being blocked.It can be seen that the water injection well sand setting constant pressure check valve that the utility model embodiment provides,
It can effectively avoid packer from shifting to an earlier date setting and fluid hole 601 to block, and it is easy to use, it is easy to large-scale promotion application.
Specifically, tubular valve body 9 and well-flushing valve body 1 constitute the main housing of ball-and-seat, tubulose connector 2, block 6,
Valve ball 8, valve seat 3 etc. are respectively positioned on inside tubular valve body 9, and the top of reverse plug 4 is located in tubular valve body 9, and bottom is located at well-flushing
In valve body 1.For the ease of the handling between tubular valve body 9 and well-flushing valve body 1, lower inner wall and the well-flushing valve body 1 of tubular valve body 9
External wall of upper portion threaded connection, the installation and maintenance being easy between tubular valve body 9 and well-flushing valve body 1, also allow for realizing flushing valve
Sand setting through hole 102 and the connection of the inner chamber of tubular valve body 9 on body 1.It is close between tubular valve body 9 and well-flushing valve body 1 in order to ensure
Envelope connection, is provided with the first sealing ring between well-flushing valve body 1 and tubular valve body 9.Specifically, can be in the outside of well-flushing valve body 1
First sealed groove is set on wall, the first sealing ring is set in the first sealed groove, makes the interior of well-flushing valve body 1 and tubular valve body 9
Wall is tightly connected, so as to avoid the junction seepage from tubular valve body 9 and well-flushing valve body 1 such as flushing fluid, ensure tubular valve body 9 with
The stability and service life that well-flushing valve body 1 connects.In order to further improve what is connected between tubular valve body 9 and well-flushing valve body 1
Sealing, at least two the first sealing rings of circle can be set.
As shown in Figure 1, the well washing hole 101 of radial direction is respectively arranged with the side wall of well-flushing valve body 1 and the sand setting of axial direction leads to
Hole 102, the middle part of well-flushing valve body 1 are provided with blind hole 103, and blind hole 103 is connected with well washing hole 101.By making blind hole 103 with washing
Wellhole 101 is connected, and flushing fluid is entered the inner chamber of tubulose connector 2 and valve seat 3, Jin Ershi by well-flushing valve body 1
Now reverse clean-out service.In order that flushing fluid enters blind hole 103 by well washing hole 101 as early as possible, can be in the side wall of well-flushing valve body 1
On be provided with multiple well washing holes 101, to improve the operating efficiency of ball-and-seat.As shown in Figure 2, well washing hole 101 and sand setting through hole
102 are set independently of each other, flushing fluid is entered well-flushing valve body 1 by well washing hole 101, make water filling by sand setting through hole 102
Sand grains outflow well-flushing valve body 1 in tubing string, avoids accumulation of the sand grains in ball-and-seat.In order that sand grains is as early as possible from sand setting through hole
Flowed out in 102, the cross-sectional area of sand setting through hole 102 can expand as far as possible, such as the cross section of sand setting through hole 102 is arranged to
Semicircular arc, or multiple cross sections are set for circular sand setting through hole 102, and be symmetrically distributed in the side wall of well-flushing valve body 1,
As long as not influenceing the setting of well washing hole 101 and blind hole 103, so as to avoid the blocking of sand setting through hole 102.
The top of well-flushing valve body 1 is provided with the tubulose connector 2 being connected with blind hole 103, for being provided for reverse plug 4
Receiving space.Tubulose connector 2 is also connected with valve seat 3, and provides support for valve seat 3.Specifically, under tubulose connector 2
In portion's insertion blind hole 103, and it is connected with the sidewall thread of blind hole 103.By inserted mode, make tubulose connector 2 and flushing valve
The combination of body 1 is more stable, avoids rocking for tubulose connector 2, and make the inwall of tubulose connector 2 and the inwall of blind hole 103
It is substantially on same plane, ensures installation and shifting of the reverse plug 4 in the blind hole 103 of tubulose connector 2 and well-flushing valve body 1
It is dynamic, avoid reverse plug 4 hindered in dropping process.Tubulose connector 2 is additionally provided with the second sealing ring with blind hole 103,
Specifically, the second sealed groove is provided with the lateral wall of tubulose connector 2, the second sealed groove can be arranged on tubulose connection
The lower section of connection screw thread on the lateral wall of body 2, to avoid the second sealed groove from influenceing between tubulose connector 2 and the side wall of blind hole 103
Threaded connection.The second sealing ring is provided with second sealed groove, connects tubulose connector 2 and the side wall sealing of blind hole 103
Connect, avoid the seepage of flushing fluid etc. from impacting the stability and service life of tubulose connector 2 and the connection of well-flushing valve body 1.
In order to obtain better sealing effectiveness, the number of the second sealed groove and the second sealing ring can be two.
During being transferred in ball-and-seat to desired depth in water injection well, the bottom of water injection string is set to keep envelope
Close, reverse plug 4 is fixed in blind hole 103 by shear pin 5 (can be by shearing the nail being interrupted), so that water injection string
Inner chamber and the inner chamber of water injection well keep apart, ensure that the pressure in water injection string does not change.In order to ensure reverse plug 4 with
The sealed connection of tubulose connector 2, the 3rd sealing ring is provided between reverse plug 4 and tubulose connector 2.Specifically, reversely
The 3rd sealed groove is provided with the lateral wall of plug 4, the 3rd sealing ring is provided with the 3rd sealed groove, makes reverse plug 4
It is connected with the inner wall sealing of tubulose connector 2, to avoid the highly pressurised liquid in water injection well from penetrating into ball-and-seat, influences packer
It is normal setting.
The water injection well sand setting constant pressure check valve that the utility model embodiment provides, its fluid hole 601 are arranged on block 6
In side wall, in order that block 6 keeps stable inside tubular valve body 9, the lower inner wall of block 6 and the top of tubulose connector 2
It is threadedly coupled between outer wall.Meanwhile the 4th sealed groove is provided with the lateral wall of tubulose connector 2, in the 4th sealed groove
The 4th sealing ring is provided with, is connected tubulose connector 2 and the inner wall sealing of block 6, to avoid the highly pressurised liquid in water injection well
Seepage, cause pressure in water injection string to increase, be further ensured that the normal setting of packer.The top of block 6 is arc-shaped, with
The friction between the sand grains to be fallen in water injection string and block 6 is reduced, sand grains is entered as early as possible by the inner chamber of tubular valve body 9 heavy
Sand through hole 102, improve the operating efficiency of ball-and-seat.
It is provided with spring 7 in the inner chamber of block 6, spring 7, which is in, to be loosened or valve ball 8 should be made to be seated in valve just during compressive state
In seat 3, after reverse plug 4 is fallen into blind hole 103, to ensure closure of the valve ball 8 to valve seat 3.The upper end of spring 7 and block 6
The top connection of inwall, lower end can be connected or offset with valve ball 8.Can be preferably the lower end of spring 7 is connected with valve ball 8,
In order to the mutual promotion between valve ball 8 and spring 7.
When needing to carry out reverse clean-out service, in order that flushing fluid can flow out fluid hole 601 as early as possible, well-flushing is improved
Efficiency, fluid hole 601 should be basically identical with the height of the position of valve ball 8, so that after flushing fluid flows out from the inner chamber of valve seat 3
It can just be flowed out immediately from fluid hole 601, reduce delay of the flushing fluid in ball-and-seat, accelerate reverse washing well process.Meanwhile go out
The diameter of fluid apertures 601 should be less than the diameter of valve ball 8, to avoid valve ball 8 from rolling out fluid hole 601, ensure the normal work of ball-and-seat.
Valve ball 8 is used to control opening or closing for ball-and-seat inner seat 3, and valve ball 8 and valve seat 3 can select to be applied to pump
Standard component in cylinder.When reverse plug 4 is fixed in blind hole 103, the top of reverse plug 4 passes through valve seat 3, and props up valve ball
8, closed equivalent to by valve seat 3, ensure the separation between water injection string inner chamber and water injection well inner chamber.And when shear pin 5 is by packer
Had no progeny between pressure when setting, after reverse plug 4 is fallen into blind hole 103, valve ball 8 is fallen directly into valve seat 3, the diameter of valve ball 8
The diameter of the inner chamber of valve seat 3 is should be greater than, to avoid valve ball 8 from falling into valve seat 3, ensures that valve ball 8 opens or closes state to valve seat 3
Control.
The center at the reverse top of plug 4 is fixed on for the ease of valve ball 8, valve ball 8 directly will after having been rushed by flushing fluid
Spring 7 compresses, reduce valve ball 8 double swerve, the utility model embodiment provide water injection well with sand setting constant pressure check valve also
Including centralizer body 10, centralizer body 10 includes head and righting portion, and righting portion is set in spring 7, upper surface and the spring 7 on head
Bottom connection, lower surface offsets with valve ball 8.
The arc groove being engaged with the top of valve ball 8 is additionally provided with the lower surface on head, in order to centralizer body 10 and valve
Ball 8 promotes mutually, is horizontally slipped when avoiding valve ball 8 from being in contact with centralizer body 10, and valve ball 8 is slided to the side of the inner chamber of block 6,
It is unfavorable for the opening of valve seat 3.Valve ball 8 is always positioned at the middle part of the inner chamber of block 6 by centralizer body 10, be easy to valve ball 8 to valve seat 3
Open or close the control of state.Similarly, in order that valve ball 8 can be rested on stably on the upper surface of reverse plug 4, reversely
The arc groove being engaged with the bottom of valve ball 8 is also equipped with the upper surface of plug 4, to avoid the double swerve of valve ball 8.When anti-
When being fallen to plug 4, you can valve ball 8 is directly caught in valve seat 3, ensure the accuracy of ball-and-seat operation, improve ball-and-seat
Operating efficiency.
The length of reverse plug 4 should be less than the distance between upper wall and the bottom of blind hole 103 of well washing hole 101, to ensure to wash
Well liquid can enter blind hole 103 by the space between reverse plug 4 and the upper wall of well washing hole 101, realize reverse well-flushing.Or
The place that can be in contact on the top of reverse plug 4, i.e., reverse plug 4 with valve seat 3, set a circle recessed radially inward
Step, flushing fluid is set to enter blind hole 103 by the gap between step and the upper wall of well washing hole 101 and the side wall of blind hole 103,
The progress of reverse clean-out service is easy in guarantee.In addition, the step be also prevented from reverse plug 4 on alter, reverse plug 4 is existed
Positioning in tubulose connector 2 and valve seat 3 is more accurate, ensures closure of the reverse plug 4 to ball-and-seat.
The ball-and-seat provided for the ease of the utility model embodiment and the connection of water injection string bottom, tubular valve body 9
Top is provided with upper binding head 11, and connection screw thread is additionally provided with the inwall of upper binding head 11, and a circle chamfering is provided with outer wall,
In order to the installation and removal of upper binding head 11 and water injection string bottom.The upper inner wall of upper binding head 11 and tubular valve body 9
Threaded connection, in order to the handling of upper binding head 11 and tubular valve body 9, make the processing and fabricating of tubular valve body 9 more convenient.
For the ease of the connection of ball-and-seat bottom and miscellaneous part, the bottom of well-flushing valve body 1 is provided with lower union joint 12, under
The outside of connector 12 is provided with connection screw thread and a circle chamfering, in order to the part such as lower union joint 12 and the oil pipe with plug
Installation and removal.Lower union joint 12 is threadedly coupled with well-flushing valve body 1, in order to the handling of lower union joint 12 and well-flushing valve body 1, is made
The processing and fabricating of well-flushing valve body 1 is more convenient.
Preferred embodiment of the present utility model is the foregoing is only, not to limit the scope of protection of the utility model,
All any modification, equivalent substitution and improvements within the spirit and principles of the utility model, made etc., should be included in this reality
Within new protection domain.
Claims (10)
1. a kind of water injection well sand setting constant pressure check valve, it is characterised in that the ball-and-seat includes：
Well-flushing valve body (1), be respectively arranged with the side wall of the well-flushing valve body (1) radial direction well washing hole (101) and axial direction it is heavy
Sand through hole (102), middle part are provided with the blind hole (103) connected with the well washing hole (101)；
Tubulose connector (2), the top of the well-flushing valve body (1) is arranged on, and is connected with the blind hole (103)；
Valve seat (3), it is arranged on the top of the tubulose connector (2)；
Reverse plug (4), is arranged in the inner chamber of the tubulose connector (2), top passes through the valve seat (3), and bottom passes through
Shear pin (5) is fixed in the blind hole (103)；
Block (6), cover are provided with fluid hole (601) on the top of the valve seat (3), side wall；
Spring (7), is arranged in the inner chamber of the block (6), and with being connected at the top of the block (6), lower end is big with diameter for upper end
Connected in the valve ball (8) of the valve seat (3) internal diameter；
Tubular valve body (9), it is arranged on above the well-flushing valve body (1), and covers mounted in the block (6), the tubulose connector
(2) outside, inner chamber are connected with the sand setting through hole (102).
2. ball-and-seat according to claim 1, it is characterised in that the cross section of the sand setting through hole (102) is semi arch
Shape.
3. ball-and-seat according to claim 1, it is characterised in that the lower inner wall of the tubular valve body (9) is washed with described
The external wall of upper portion threaded connection of well valve body (1)；
And it is provided with the first sealing ring between the tubular valve body (9) and the well-flushing valve body (1).
4. ball-and-seat according to claim 1, it is characterised in that the bottom insertion of the tubulose connector (2) is described blind
In hole (103), and it is connected with the sidewall thread of the blind hole (103)；
And it is provided with the second sealing ring between the tubulose connector (2) and the blind hole (103).
5. ball-and-seat according to claim 1, it is characterised in that the reversely plug (4) and the tubulose connector (2)
Between be provided with the 3rd sealing ring.
6. ball-and-seat according to claim 1, it is characterised in that the top of the block (6) is arc-shaped.
7. ball-and-seat according to claim 1, it is characterised in that the ball-and-seat also includes：Centralizer body (10), it is described to help
Roman (10) includes head and righting portion；
The righting portion is set in the spring (7), and the upper surface on the head is connected with the lower end of the spring (7), under
End face offsets with the valve ball (8).
8. ball-and-seat according to claim 7, it is characterised in that be provided with the lower surface on the head and the valve ball
(8) arc groove that top is engaged；
It is described to be reversely provided with the arc groove being engaged with the valve ball (8) bottom on the upper surface of plug (4).
9. ball-and-seat according to claim 1, it is characterised in that the top of the reversely plug (4) is provided with a circle edge
Radially-inwardly recessed step.
10. ball-and-seat according to claim 1, it is characterised in that the top of the tubular valve body (9) is provided with connection
Head (11)；
The bottom of the well-flushing valve body (1) is provided with lower union joint (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720358066.7U CN206830131U (en) | 2017-04-07 | 2017-04-07 | A kind of water injection well sand setting constant pressure check valve |
Applications Claiming Priority (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067532A (en) * | 2019-05-21 | 2019-07-30 | 唐山冀东石油机械有限责任公司 | Lateral ball-and-seat |
| CN112761596A (en) * | 2021-01-13 | 2021-05-07 | 孙伟峰 | Pressure guide structure of pump |
| CN114482950A (en) * | 2020-10-27 | 2022-05-13 | 中国石油天然气股份有限公司 | Injection increasing device for water injection well |
-
2017
- 2017-04-07 CN CN201720358066.7U patent/CN206830131U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067532A (en) * | 2019-05-21 | 2019-07-30 | 唐山冀东石油机械有限责任公司 | Lateral ball-and-seat |
| CN114482950A (en) * | 2020-10-27 | 2022-05-13 | 中国石油天然气股份有限公司 | Injection increasing device for water injection well |
| CN114482950B (en) * | 2020-10-27 | 2023-09-26 | 中国石油天然气股份有限公司 | Injection increasing device for water injection well |
| CN112761596A (en) * | 2021-01-13 | 2021-05-07 | 孙伟峰 | Pressure guide structure of pump |
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