CN207332849U - A kind of subdivision of reservoir water injection string - Google Patents
A kind of subdivision of reservoir water injection string Download PDFInfo
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- CN207332849U CN207332849U CN201721221519.8U CN201721221519U CN207332849U CN 207332849 U CN207332849 U CN 207332849U CN 201721221519 U CN201721221519 U CN 201721221519U CN 207332849 U CN207332849 U CN 207332849U
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Abstract
It the utility model is related to a kind of subdivision of reservoir water injection string, including the tubular column main body in well bore casing, the top of tubular column main body is equipped with anchor, the bottom of tubular column main body is screwed with silk plug, the top of silk plug is equipped with screen casing, the top of screen casing is equipped with check valve, check valve is located at the lower section of bottommost oil reservoir, anchor is located at the top of top oil reservoir, tubular column main body between anchor and check valve is equipped with the packer of closing well bore casing inner cavity annular space and the eccentric injection mandrel to the annulus water injection of well bore casing inner cavity, packer is washing well long packing element packer, washing well long packing element packer sets at interlayer between each oil reservoir or sets on oil sheet.The subdivision of reservoir water injection string can block the characteristic of envelope perforated interval using the packing element of long packing element packer, to lesser calorie away from that can lose Partial cells, realize the closure of two interlayers；And the thin layer that envelope needs block can be blocked, the degree of stratum subdivision injection is lifted, improves stratum sweep efficiency, improves oil recovery factor.
Description
Technical field
A kind of packer of oil field deep well, more particularly to a kind of subdivision of reservoir water injection string are the utility model is related to, is belonged to
Oil recovery technical field of auxiliary equipment.
Background technology
Packer is the important tool of the oil-separating layer in casing, its primary sealing element is packing element.Pass through waterpower, machine
Tool or self-styled effect so that packing element bulging Seal Oil covers annular space, upper and lower oil reservoir is separated, so as to reach certain construction
Purpose.
Seperated layer water injection is to maintain strata pressure, solve interlayer, in layer, horizontal contradiction, extend oil field high yield, stable yields it is important
Means, and packer is the key tool for realizing seperated layer water injection.Y341-114 deep-well water injection packers be mainly used for seperated layer water injection,
The construction such as water blockoff and water detection particularly Temperature Deep, high-voltage layering injection.
Water injection string is combined into using eccentric injection mandrel, packer, screen casing, silk plug etc. substantially in the prior art.By oil pipe
The factors such as flexible, packer card envelope position, school be deep influence, and the layer column pitch sealed to card requires, for lesser calorie away from or centre deposit
A layer water filling can not be finely divided in the production layer of thin layer.
Utility model content
The purpose of this utility model is that overcome problems of the prior art, there is provided a kind of subdivision of reservoir water injection string,
Card envelope lesser calorie can be realized away from the degree with short lap, further lifting stratum subdivision injection.
To solve above technical problem, a kind of subdivision of reservoir water injection string of the utility model, including in well bore casing
Tubular column main body, the top of the tubular column main body is equipped with anchor, and the bottom of the tubular column main body is screwed with silk plug, the silk plug
Top be equipped with screen casing, the top of the screen casing is equipped with check valve, and the check valve is located at the lower section of bottommost oil reservoir, the anchor
Determine the top that device is located at top oil reservoir, the tubular column main body between the anchor and the check valve is equipped with closing wellbore set
The packer of tube cavity annular space and the eccentric injection mandrel to the annulus water injection of well bore casing inner cavity, the packer are the long glue of washing well
Cylinder packer, the washing well long packing element packer set at interlayer between each oil reservoir or set on oil sheet.
Relative to the prior art, the utility model achieves following beneficial effect：This water injection string is insulated using long packing element type
Device, packing element length reach more than 50cm, and after the depth of magnetic orientation school, card is encapsulated between two layers, utilizes the glue of long packing element packer
Cylinder can block the characteristic of envelope perforated interval, to lesser calorie away from that can lose Partial cells, realize the closure of two interlayers；And envelope can be blocked
Need the thin layer blocked, in the past can not the stratum of seperated layer water injection dispense, improve stratum sweep efficiency, improve crude oil and adopt
Yield.
As the improvement of the utility model, the washing well long packing element packer includes top connection, central tube, well-flushing work
Cylinder, well-flushing piston, upper piston cylinder, shear pin set, packing element, lower piston cylinder and lower contact, the top connection are screwed in the central tube
Upper end, the upper end of the well-flushing seating nipple is fixed on the periphery of the top connection, and the well-flushing piston is located at the well-flushing work
Make between the inner wall of cylinder and the lower end outer wall of the top connection；The lower end of the top connection is screwed with the long casing extended downwardly,
The long casing is sleeved on the periphery of the central tube, and the upper periphery of the long casing is equipped with upper piston；The upper piston
Top be resisted against outer wall below the lower port of the top connection and positioned at the long casing and the well-flushing piston inner wall it
Between, the middle part periphery of the upper piston is sealedly connected in the upper piston cylinder, and the lower end of the upper piston is inlaid in described cut
In the top bar hole for following closely set；Shear pin is screwed with the top circumferential wall of the shear pin set, the inner termination of the shear pin is inserted in institute
State in upper piston；Packing element is equipped with below the lower port of the shear pin set, the inner wall of the packing element is equipped with packing element bushing pipe, the packing element
Liner sleeve is mounted in the periphery of the long casing, and the upper end of the packing element bushing pipe is screwed in the internal thread of the shear pin set lower end,
The lower end of the packing element bushing pipe is screwed in the internal thread of connection set upper side；Under the lower end of the connector sleeve and the long casing
Valve body is equipped between end, the lower end periphery of the valve body and the upper end of the lower piston cylinder are mutually screwed on, the upper end of the lower contact
It is screwed in the lower end of the central tube and the lower end inner wall positioned at the lower piston cylinder realizes sealing.Top connection connects with top tubing string
Connect, lower contact is connected with lower section tubing string, when setting, is pressurizeed into central tube, and well-flushing piston is pushed to lower section, by well-flushing working hole
Block；Pressure fluid is open-top by spool upwards from the inner cavity of lower piston cylinder, between long casing and packing element bushing pipe, is served as a contrast by packing element
Gap on pipe makes outwards expansion in the middle part of packing element, completes to set.When release in central tube, pressure that spool is come from above
It is automatically closed, guarantee sets reliable.During well-flushing, release in central tube, to the applied pressure by annulus of set packer periphery, well-flushing piston is pushed away
To top, well-flushing working hole exposes, and carries out clean-out service.During deblocking, connector is above put on, shear pin is cut, and shear pin set moves up, glue
Pressure in cylinder is discharged and bounced back, and completes this grade deblocking.
As further improvement of the utility model, the middle part of the top connection is equipped with top connection through hole, the top connection
Through hole links up the inner cavity of the top connection and the inner cavity of the well-flushing seating nipple；The long casing at the top of the upper piston with setting
There is well-flushing working hole, the well-flushing working hole passes through the runner in the long casing and the well-flushing fluid hole phase on the valve body
Even.Pressure fluid in central tube enters well-flushing piston upper chamber from top connection through hole, will promote well-flushing descent of piston that well-flushing works
Close in hole；To the applied pressure by annulus of set packer periphery, well-flushing piston is pushed to top, and well-flushing working hole exposes, and pressure fluid is from well-flushing
Working hole, which enters in the runner of long casing, to flow downward and crosses packing element section, and packing element is flowed out into from the well-flushing fluid hole of valve body
The annular space of lower section, finally enters central tube to moving uphole from tubing string bottom.
The valve flowing channel penetrated through along short transverse, institute are equipped with as further improvement of the utility model, in the valve body
State and valve rod is plugged with valve flowing channel, the upper end of the valve rod is connected with spool, and the sealing surface of the spool lower end is setting in institute
The upper port of valve flowing channel is stated, the upper surface of the spool is equipped with spring, and the upper end of the spring is supported on the lower section of catch, institute
Catch is stated to be located between the inner wall of connector sleeve and the outer wall of long casing.Pressure fluid is from the inner cavity of lower piston cylinder upwards by spool top
Open, the spring above spool is compressed, and pressure fluid, which reaches packing element inner wall, expands packing element, and realization is set；After setting, below spool
Spool is pressed in the upper port of valve flowing channel by the pressure above release, spring and spool, is so realized the unidirectional of valve body and is led
It is logical.
As further improvement of the utility model, the upper and lower ends of the packing element and the packing element bushing pipe are in castellated knot
Close, the upper end periphery of the packing element is set with packing element upper jacket, and the upper end of the packing element upper jacket is sleeved on the shear pin set
Lower end periphery；The lower end periphery of the packing element is set with packing element lower jacket, and the lower end of the packing element lower jacket is sleeved on described cut
Follow closely the upper end periphery of set.Packing element upper jacket and packing element lower jacket can tightly be fixed with the upper and lower ends of packing element, be ensured in packing element
Portion's expansion is reliable.
As further improvement of the utility model, the lower end of the well-flushing piston is flush-mounted in well-flushing piston bush, described
Realized and sealed by skeleton cushion rubber and the well-flushing piston bush in the bottom of well-flushing piston.
As further improvement of the utility model, the middle part periphery of the upper piston is screwed in the interior of the upper piston cylinder
Realized and sealed by T-shaped cushion rubber between the upper port of chamber, the periphery step of the upper piston and the upper piston cylinder.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description, attached drawing only provides ginseng
Examine and used with explanation, be not used to limitation the utility model.
Fig. 1 is the schematic diagram of the utility model subdivision of reservoir water injection string embodiment one.
Fig. 2 is the schematic diagram of the utility model subdivision of reservoir water injection string embodiment two.
Fig. 3 is the schematic diagram of the utility model subdivision of reservoir water injection string embodiment three.
Fig. 4 is the sectional view of Fig. 1 washing well long packing element packers into figure.
Fig. 5 is the enlarged drawing of Fig. 4.
In figure：A. anchor；B. washing well long packing element packer；C. eccentric injection mandrel；D. check valve；E. screen casing；F. silk
It is stifled；1. top connection；1a. top connection through holes；2. central tube；3. long casing；4. well-flushing seating nipple；4a. baffle rings；5. well-flushing piston；
5a. well-flushing piston bush；5b. skeleton cushion rubbers；6. upper piston；6a.T shape cushion rubbers；7. upper piston cylinder；8. shear pin set；8a. shear pins；9.
Packing element；10. packing element bushing pipe；11. packing element upper jacket；12. packing element lower jacket；13. well-flushing working hole；14. connector sleeve；15. valve body；
16. catch；17. spring；18. spool；19. valve rod；20. lower piston cylinder；21. lower contact.
Embodiment
As shown in Figure 1, the subdivision of reservoir water injection string of the utility model includes the tubular column main body being located in well bore casing, tubing string
The top of body is equipped with anchor A, and the bottom of tubular column main body is screwed with silk plug F, and the top of silk plug F is equipped with screen casing E, screen casing E's
Top is equipped with check valve D, and check valve D is located at the lower section of bottommost oil reservoir, and anchor A is located at the top of top oil reservoir, grappling
Tubular column main body between device A and check valve D is equipped with the packer of closing well bore casing inner cavity annular space and to well bore casing inner cavity
The eccentric injection mandrel C of annulus water injection, packer are washing well long packing element packer B, and washing well long packing element packer B is set in each
At interlayer between oil reservoir or set on oil sheet.
Fig. 2 show washing well long packing element packer B and sets situation at the interlayer between each oil reservoir.Fig. 3 is shown
Washing well long packing element packer B is set in the situation on oil sheet.
This water injection string uses long packing element packer, and packing element length reaches more than 50cm, after the depth of magnetic orientation school, card envelope
Between two layers, the characteristic of envelope perforated interval can be blocked using the packing element of long packing element packer, to lesser calorie away from part can be lost
Eyelet, realizes the closure of two interlayers；And the thin layer that blocks of envelope needs can be blocked, in the past can not seperated layer water injection stratum progress
Dispensing, improves stratum sweep efficiency, improves oil recovery factor.
As shown in Figure 4, Figure 5, washing well long packing element packer B includes top connection 1, central tube 2, well-flushing seating nipple 4, well-flushing
Piston 5, upper piston cylinder 7, shear pin set 8, packing element 9, lower piston cylinder 20 and lower contact 21, top connection 1 are screwed in the upper of central tube 2
End, the upper end of well-flushing seating nipple 4 are fixed on the periphery of top connection 1, and baffle ring 4a is pressed in the top of well-flushing seating nipple 4,5, well-flushing piston
Between the inner wall of well-flushing seating nipple 4 and the lower end outer wall of top connection 1.The lower end of top connection 1 is screwed with the long set extended downwardly
Pipe 3, long casing 3 are sleeved on the periphery of central tube 2, and the upper periphery of long casing 3 is equipped with upper piston 6；The top of upper piston 6 against
Below the lower port of top connection 1 and it is located between the outer wall of long casing 3 and the inner wall of well-flushing piston 5, outside the middle part of upper piston 6
It is sealedly connected in week in upper piston cylinder 7, the lower end of upper piston 6 is inlaid in the top bar hole of shear pin set 8；The top of shear pin set 8
Shear pin 8a is screwed with circumferential wall, the inner termination of shear pin 8a is inserted in upper piston 6.
Packing element 9 is equipped with below the lower port of shear pin set 8, the inner wall of packing element 9 is equipped with packing element bushing pipe 10, and packing element bushing pipe 10 is set with
In the periphery of long casing 3, the upper end of packing element bushing pipe 10 is screwed in the internal thread that shear pin covers 8 lower ends, the lower end of packing element bushing pipe 10
It is screwed in the internal thread of 14 upper end of connector sleeve；Valve body 15, valve body are equipped between the lower end of connector sleeve 14 and the lower end of long casing 3
The upper end of 15 lower end periphery and lower piston cylinder 20 is mutually screwed on, and the upper end of lower contact 21 is screwed in the lower end of central tube 2 and is located at
The lower end inner wall of lower piston cylinder 20 realizes sealing.
The middle part of top connection 1 is equipped with top connection through hole 1a, and top connection through hole 1a links up the inner cavity of top connection 1 and well-flushing works
The inner cavity of cylinder 4；The top of long casing 3 and upper piston 6 is equipped with well-flushing working hole 13, and well-flushing working hole 13 passes through in long casing 3
Runner is connected with the well-flushing fluid hole on valve body 15.Pressure fluid in central tube 2 enters on well-flushing piston from top connection through hole 1a
Chamber, will promote and be about to well-flushing working hole 13 under well-flushing piston 5 and close；To the applied pressure by annulus of set packer periphery, well-flushing piston 5 is pushed away
To top, well-flushing working hole 13 exposes, and pressure fluid, which enters from well-flushing working hole 13 in the runner of long casing 3, to flow downward and cross
Packing element section, the annular space of the lower section of packing element 9 is flowed out into from the well-flushing fluid hole of valve body 15, finally enters central tube from tubing string bottom
2 to moving uphole.
The valve flowing channel penetrated through along short transverse is equipped with valve body 15, valve rod 19 is plugged with valve flowing channel, valve rod 19
Upper end is connected with spool 18, and the setting upper port in valve flowing channel of sealing surface of 18 lower end of spool, the upper surface of spool 18 is equipped with
Spring 17, the upper end of spring 17 are supported on the lower section of catch 16, and catch 16 is located at the outer of inner wall in connector sleeve 14 and long casing 3
Between wall.Pressure fluid is open-top by spool 18 upwards from the inner cavity of lower piston cylinder 20, and the spring 17 of the top of spool 18 is compressed, pressure
Liquid, which reaches 9 inner wall of packing element, expands packing element 9, and realization is set；After setting, 18 lower section release of spool, spring 17 and the top of spool 18
Pressure spool 18 is pressed in the upper port of valve flowing channel, so realize the one-way conduction of valve body 15.
The upper and lower ends of packing element 9 and packing element bushing pipe 10 are in castellated combination, and the upper end periphery of packing element 9, which is set with packing element, to be protected
Set 11, the upper end of packing element upper jacket 11 are sleeved on the lower end periphery of shear pin set 8；The lower end periphery of packing element 9 is set with packing element and protects
Set 12, the lower end of packing element lower jacket 12 are sleeved on the upper end periphery of shear pin set 8.Packing element upper jacket 11 and packing element lower jacket 12 can be with
The upper and lower ends of packing element 9 are tightly fixed, and ensure that the expansion of the middle part of packing element 9 is reliable.
The lower end of well-flushing piston 5 is flush-mounted in well-flushing piston bush 5a, and the bottom of well-flushing piston 5 is by skeleton cushion rubber 5b with washing
Well piston bush 5a realizes sealing.
The middle part periphery of upper piston 6 is screwed in the inner cavity of upper piston cylinder 7, periphery step and the upper piston cylinder 7 of upper piston 6
Realized and sealed by T-shaped cushion rubber 6A between upper port.
When setting, pressurize into central tube 2, well-flushing piston is pushed to lower section, and well-flushing working hole 13 is blocked；Pressure fluid from
The inner cavity of lower piston cylinder 20 is open-top by spool 18 upwards, between long casing 3 and packing element bushing pipe 10, by packing element bushing pipe 10
Gap make the outwards expansion of the middle part of packing element 9, complete to set.When release in central tube 2, pressure that spool 18 is come from above
It is automatically closed, guarantee sets reliable.
During well-flushing, release in central tube 2, to the applied pressure by annulus of set packer periphery, well-flushing piston is pushed to top, well-flushing work
Make hole 13 to expose, carry out clean-out service.
During deblocking, connector 1 is above put on, shear pin 8a is cut, and shear pin set 8 moves up, and the pressure in packing element 9 is discharged and bounced back,
Complete this grade deblocking.
The foregoing is merely the preferable possible embodiments of the utility model, non-therefore limitation the utility model patent
Protection domain.In addition to the implementation, the utility model can also have other embodiment.It is all to use equivalent substitution or equivalent change
The technical solution to be formed is changed, is all fallen within the protection domain of the requires of the utility model.Technology of the utility model without description is special
Sign can realize that details are not described herein by or using the prior art.
Claims (7)
1. a kind of subdivision of reservoir water injection string, including the tubular column main body in well bore casing, the top of the tubular column main body are equipped with
Anchor, the bottom of the tubular column main body are screwed with silk plug, and the top of the silk plug is equipped with screen casing, and the top of the screen casing is equipped with
Check valve, the check valve are located at the lower section of bottommost oil reservoir, and the anchor is located at the top of top oil reservoir, the grappling
Tubular column main body between device and the check valve is equipped with the packer of closing well bore casing inner cavity annular space and into well bore casing
The eccentric injection mandrel of chamber annulus water injection, it is characterised in that：The packer is washing well long packing element packer, the washing well length
Tubing Packer sets at interlayer between each oil reservoir or sets on oil sheet.
2. subdivision of reservoir water injection string according to claim 1, it is characterised in that：The washing well long packing element packer includes
Top connection, central tube, well-flushing seating nipple, well-flushing piston, upper piston cylinder, shear pin set, packing element, lower piston cylinder and lower contact, it is described
Top connection is screwed in the upper end of the central tube, and the upper end of the well-flushing seating nipple is fixed on the periphery of the top connection, described
Well-flushing piston is between the inner wall of the well-flushing seating nipple and the lower end outer wall of the top connection；The lower end rotation of the top connection
The long casing extended downwardly is connected to, the long casing is sleeved on the periphery of the central tube, and the upper periphery of the long casing is set
There is upper piston；The top of the upper piston be resisted against outer wall below the lower port of the top connection and positioned at the long casing with
Between the inner wall of the well-flushing piston, the middle part periphery of the upper piston is sealedly connected in the upper piston cylinder, the upper work
The lower end of plug is inlaid in the top bar hole of the shear pin set；Shear pin is screwed with the top circumferential wall of the shear pin set, it is described
The inner termination of shear pin is inserted in the upper piston；Packing element, the inner wall of the packing element are equipped with below the lower port of the shear pin set
Equipped with packing element bushing pipe, the packing element liner sleeve is mounted in the periphery of the long casing, and the upper end of the packing element bushing pipe is screwed in described
In the internal thread of shear pin set lower end, the lower end of the packing element bushing pipe is screwed in the internal thread of connection set upper side；The connector sleeve
Lower end and the long casing lower end between be equipped with valve body, the upper end phase of the lower end periphery of the valve body and the lower piston cylinder
Be screwed on, the upper end of the lower contact is screwed in the lower end of the central tube and the lower end inner wall positioned at the lower piston cylinder realize it is close
Envelope.
3. subdivision of reservoir water injection string according to claim 2, it is characterised in that：The middle part of the top connection is equipped with top connection
Through hole, the top connection through hole link up the inner cavity of the top connection and the inner cavity of the well-flushing seating nipple；The long casing and institute
The top for stating upper piston is equipped with well-flushing working hole, and the well-flushing working hole passes through on the runner in the long casing and the valve body
Well-flushing fluid hole be connected.
4. subdivision of reservoir water injection string according to claim 2, it is characterised in that：It is equipped with the valve body and is passed through along short transverse
Logical valve flowing channel, is plugged with valve rod in the valve flowing channel, the upper end of the valve rod is connected with spool, the spool lower end
The setting upper port in the valve flowing channel of sealing surface, the upper surface of the spool are equipped with spring, the upper end support of the spring
In the lower section of catch, the catch is located between the inner wall of connector sleeve and the outer wall of long casing.
5. the subdivision of reservoir water injection string according to Claims 2 or 3 or 4, it is characterised in that：The upper and lower ends of the packing element with
The packing element bushing pipe is in castellated combination, and the upper end periphery of the packing element is set with packing element upper jacket, the packing element upper jacket
Upper end is sleeved on the lower end periphery of the shear pin set；The lower end periphery of the packing element is set with packing element lower jacket, under the packing element
The lower end of sheath is sleeved on the upper end periphery of the shear pin set.
6. the subdivision of reservoir water injection string according to Claims 2 or 3 or 4, it is characterised in that：The lower end of the well-flushing piston is embedding
Loaded in well-flushing piston bush, sealing is realized in the bottom of the well-flushing piston by skeleton cushion rubber and the well-flushing piston bush.
7. the subdivision of reservoir water injection string according to Claims 2 or 3 or 4, it is characterised in that：The middle part periphery of the upper piston
The inner cavity of the upper piston cylinder is screwed in, passes through T between the periphery step of the upper piston and the upper port of the upper piston cylinder
Shape cushion rubber realizes sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721221519.8U CN207332849U (en) | 2017-09-22 | 2017-09-22 | A kind of subdivision of reservoir water injection string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721221519.8U CN207332849U (en) | 2017-09-22 | 2017-09-22 | A kind of subdivision of reservoir water injection string |
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| Publication Number | Publication Date |
|---|---|
| CN207332849U true CN207332849U (en) | 2018-05-08 |
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ID=62370191
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721221519.8U Active CN207332849U (en) | 2017-09-22 | 2017-09-22 | A kind of subdivision of reservoir water injection string |
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| CN (1) | CN207332849U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709557A (en) * | 2019-10-24 | 2021-04-27 | 中国石油化工股份有限公司 | Safe and long-acting water injection string for offshore oil field and construction method |
| CN114427381A (en) * | 2020-10-13 | 2022-05-03 | 中国石油化工股份有限公司 | Underground fluid injection flow velocity tuner and method |
-
2017
- 2017-09-22 CN CN201721221519.8U patent/CN207332849U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709557A (en) * | 2019-10-24 | 2021-04-27 | 中国石油化工股份有限公司 | Safe and long-acting water injection string for offshore oil field and construction method |
| CN112709557B (en) * | 2019-10-24 | 2022-12-06 | 中国石油化工股份有限公司 | Safe and long-acting water injection string for offshore oil field and construction method |
| CN114427381A (en) * | 2020-10-13 | 2022-05-03 | 中国石油化工股份有限公司 | Underground fluid injection flow velocity tuner and method |
| CN114427381B (en) * | 2020-10-13 | 2024-04-16 | 中国石油化工股份有限公司 | Downhole fluid injection flow speed regulator and method |
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