CN209195382U - Separate injection tubing string - Google Patents
Separate injection tubing string Download PDFInfo
- Publication number
- CN209195382U CN209195382U CN201821692954.3U CN201821692954U CN209195382U CN 209195382 U CN209195382 U CN 209195382U CN 201821692954 U CN201821692954 U CN 201821692954U CN 209195382 U CN209195382 U CN 209195382U
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- CN
- China
- Prior art keywords
- flow regulator
- well downhole
- injection well
- downhole flow
- inclined shaft
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- 238000002347 injection Methods 0.000 title claims abstract description 121
- 239000007924 injection Substances 0.000 title claims abstract description 121
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000009826 distribution Methods 0.000 claims abstract description 32
- 238000010079 rubber tapping Methods 0.000 claims abstract description 21
- 238000011010 flushing procedure Methods 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000000151 deposition Methods 0.000 abstract description 7
- 239000000356 contaminant Substances 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model relates to oil extraction in oil field technical fields, and in particular to a kind of separate injection tubing string.Separate injection tubing string includes the top injection well downhole flow regulator being sequentially connected in series from the top down, middle part injection well downhole flow regulator, bottom injection well downhole flow regulator and part flow arrangement, bottom injection well downhole flow regulator is eccentric injection mandrel, part flow arrangement includes inclined shaft current divider, inclined shaft current divider has central passage and annulus access, check valve is provided between inclined shaft current divider and eccentric injection mandrel, the bottom water distribution by-pass prot and middle part water distribution by-pass prot of inclined shaft current divider are connected to the draining hole of the draining hole of bottom injection well downhole flow regulator and middle part injection well downhole flow regulator respectively.In well-flushing, the blanking plug for salvaging bottom injection well downhole flow regulator is not needed, flushing fluid can enter bottom injection well downhole flow regulator up to oil pipe top by inclined shaft current divider from bottom tapping pipe by check valve.The well-flushing mode is easy to operate, and workload is small, solves the problems, such as that existing separate injection tubing string uses the concentric roater regulator of easy depositing contaminants to need frequently pulling heavy workload caused by regular clean as bottom injection well downhole flow regulator.
Description
Technical field
The utility model relates to oil extraction in oil field technical fields, and in particular to a kind of separate injection tubing string.
Background technique
Currently, being continuously increased with directional well in oilfield exploitation and inclined shaft, and the hole deviation of directional well and inclined shaft is big, note
Under the influence of the factors such as water pressure height, the layered seal and dropping-fishing test for leading to problems such as inclined shaft high pressure dispense become increasingly conspicuous,
Underground is difficult to realize precisely subdivided water filling.Conventional zonal injection technology technology is applicable in well of the hole deviation within 30 ° or less, well depth 2000m,
Dropping-fishing test success rate 90% or so；When hole deviation degree is in the well within 30 ° or more, 45 ° or less, well depth 2000m, dropping-fishing test
Success rate 50% or so；When gradient is at 45 ° or more, the dropping-fishing test of conventional zonal injection technology will be unable to implement, when dropping-fishing test,
It is influenced by frictional force, the problems such as fuse pulling of injection well downhole flow regulator is not in place, piano wire is broken often will frequently occur.
The Chinese patent application that application publication number is CN104453808A, data of publication of application is 2015.03.25 discloses one
Underground dispensing method and separate injection tubing string are planted, all injection well downhole flow regulators concentrate in the oil reservoir of top in separate injection tubing string, and oil reservoir is infused to the lower part
The lower part injection well downhole flow regulator of water in part flow arrangement to the lower part oil reservoir by filling the water, and separate injection tubing string is shunted by extending in such the injecting process
The length of device adapts to different injection layer depth, realizes the effect of depositing.Bottom injection well downhole flow regulator is to match with one heart in the tubing string
Hydrophone is easy depositing contaminants, needs frequent well-flushing, each well-flushing requires ability after salvaging the blanking plug of concentric roater regulator
Well-flushing increases task difficulty and workload.
Utility model content
The purpose of the utility model is to provide a kind of separate injection tubing strings, to solve existing separate injection tubing string due to bottom injection well downhole flow regulator
The problem of pulling heavy workload caused by needing frequently periodically to clean using the concentric roater regulator of easy depositing contaminants.
To achieve the above object, the technical solution of the separate injection tubing string of the utility model are as follows: separate injection tubing string, including from the top down
Top injection well downhole flow regulator, middle part injection well downhole flow regulator, bottom injection well downhole flow regulator and the part flow arrangement being sequentially connected in series connect on the periphery of part flow arrangement useful
In the upper packer for separating top oil reservoir and middle part oil reservoir, and separate the lower packet of middle part oil reservoir and bottom oil layer, shunts
Device includes bottom tapping pipe for being connected to bottom oil layer and the middle part isocon for being set on bottom tapping pipe periphery, in
Part flow tube surrounds the shunting interval being connected to middle part oil reservoir with bottom tapping pipe, during upper packer and lower packet are each attached to
In the flow tube of part, it is further fixed on the isocon of middle part between upper packer and lower packet for being connected to shunting interval in
The throttling linker of portion's oil reservoir, bottom injection well downhole flow regulator are eccentric injection mandrel, and part flow arrangement includes oblique below the injection well downhole flow regulator of bottom
Well current divider, inclined shaft current divider have the central passage being connected to bottom tapping pipe and are spaced in central passage periphery and shunting
The annulus access of connection, being provided between inclined shaft current divider and eccentric injection mandrel, which makes the flushing fluid in central passage enter bottom, matches
Also there is on inclined shaft current divider check valve in hydrophone bottom water distribution by-pass prot be connected to central passage and middle part water distribution to bypass
Hole, bottom water distribution by-pass prot and middle part water distribution the by-pass prot draining hole with the draining hole of bottom injection well downhole flow regulator and middle part injection well downhole flow regulator respectively
Connection.
The separate injection tubing string of the utility model the utility model has the advantages that bottom injection well downhole flow regulator is set as eccentric by the utility model separate injection tubing string
Injection well downhole flow regulator has flow channels among eccentric injection mandrel, is not easy depositing contaminants, reduces well-flushing number, eccentric injection mandrel and inclined shaft
Check valve is provided between current divider, the utility model does not need the blanking plug for salvaging bottom injection well downhole flow regulator, flushing fluid in well-flushing
Bottom injection well downhole flow regulator can be entered up to oil pipe top by inclined shaft current divider from bottom tapping pipe by check valve.The well-flushing mode is grasped
Make simply, workload is small, solves existing separate injection tubing string since bottom injection well downhole flow regulator uses the concentric roater regulator of easy depositing contaminants
The problem of pulling heavy workload caused by needing frequently periodically to clean.
Further, in order to facilitate processing, the inclined shaft current divider includes upper tap and lower tap, lower shunting
Upper end of joint inserts in supreme tap and forms the annulus access between lower tap and upper tap, described
Central passage runs through upper tap and lower tap, and the bottom water distribution by-pass prot and middle part water distribution by-pass prot are arranged upper
On tap.
Further, in order to facilitate the connection of bottom water distribution by-pass prot and the draining hole of bottom injection well downhole flow regulator.Match the bottom
The drainage mouth down of hydrophone is arranged, and the protrusion part of the side setting of bottom injection well downhole flow regulator, the draining hole setting is in protrusion part
Lower end
Further, it rises in order to facilitate separate injection tubing string.The upper end of the protrusion part is provided with lead-in chamfered.
Further, the installation length of inclined shaft pipeline is adjusted for convenience.Bottom water distribution by-pass prot and middle part water distribution bypass
Hole is connected to the draining hole of the draining hole of bottom injection well downhole flow regulator and middle part injection well downhole flow regulator respectively by inclined shaft pipeline.The inclined shaft pipeline packet
Inclined shaft telescopic segment and inclined shaft fixed section are included, inclined shaft telescopic segment includes the inner and outer tubes being mutually slidably matched, and inner tube protrudes into outer tube
Interior part is equipped with the positioning joint of limitation inner tube abjection.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the separate injection tubing string of the utility model in a state of use；
Fig. 2 is the cross-sectional view of bottom injection well downhole flow regulator in Fig. 1；
Fig. 3 is the structural schematic diagram of inclined shaft current divider in Fig. 1；
Fig. 4 is the left view of Fig. 3；
Fig. 5 is the structural schematic diagram of the inclined shaft flexible pipe line in Fig. 1；
Fig. 6 is the structural schematic diagram of the inclined shaft fixed pipelines in Fig. 1；
In figure: 1, top injection well downhole flow regulator, 2, middle part injection well downhole flow regulator, 3, middle part inclined shaft pipeline, 4, bottom injection well downhole flow regulator, 5, bottom inclined shaft
Pipeline, 6, ball valve, 7, part flow arrangement, 8, inclined shaft current divider, 9, hydraulic anchor, 10, upper packer, 11, throttling linker, 12, under
Packer, 13, grafting sealer, 14, screen casing, 15, silk plug, 16, bottom tapping pipe, 17, middle part isocon, 18, shunting interval,
19, top oil reservoir, 20, middle part oil reservoir, 21, bottom oil layer, 22, oil pipe, 41, bottom injection well downhole flow regulator draining hole, 42, protrusion part,
421, lead-in chamfered, 81, central passage, 82, upper tap, 83, lower tap, 84, annulus access, 821, bottom water distribution
By-pass prot, 822, middle part water distribution by-pass prot, 311, flexible top connection, 312, telescoping inner, 313, anchor tip, 314, limit connects
Head, 315, outer telescopic tube, 316, flexible lower contact, 321, fixed top connection, 322, fixing pipe, 323, fixed lower contact.
Specific embodiment
The embodiments of the present invention is described further with reference to the accompanying drawing.
The specific embodiment of the separate injection tubing string of the utility model, as shown in Figure 1, separate injection tubing string includes successively going here and there from the top down
Top injection well downhole flow regulator 1, middle part injection well downhole flow regulator 2, bottom injection well downhole flow regulator 4, ball valve 6 and the part flow arrangement 7 connect, part flow arrangement 7 include and ball valve
Fixed inclined shaft current divider 8, the bottom tapping pipe 16 and middle part isocon 17 being connect with inclined shaft current divider, middle part isocon 17 with
Bottom tapping pipe 16 surrounds the shunting interval 18 being connected to middle part oil reservoir 20.Middle part isocon is connected on 17 periphery for separating
The upper packer 10 of top oil reservoir and middle part oil reservoir 20, and separate the lower packet 12 of middle part oil reservoir and bottom oil layer, middle part
It is also fixedly connected on isocon 17 between upper packer 10 and lower packet 12 for being connected to shunting interval 18 and middle part
The throttling linker 11 of oil reservoir 20.
8 outside of inclined shaft current divider and middle part isocon 17, hydraulic anchor 9, upper packer 10, throttling linker 11, lower packing
Device 12, intubation sealer 13, screen casing 14, silk plug 15 connect, and 8 inside of inclined shaft current divider is connect with bottom tapping pipe 16.
In order to the bottom injection well downhole flow regulator 4 solved the problems, such as in existing separate injection tubing string be easy depositing contaminants, exist blocking risk.Bottom
Portion's injection well downhole flow regulator 4 and middle part injection well downhole flow regulator 2 are all made of eccentric injection mandrel.Bottom injection well downhole flow regulator 4 is identical with the structure of middle part injection well downhole flow regulator 2, such as
Shown in Fig. 2, bottom injection well downhole flow regulator draining hole 41 is arranged downward, the protrusion part 42 of the side setting of bottom injection well downhole flow regulator 4, bottom water distribution
The lower end of protrusion part 42 is arranged in device draining hole 41, and casing coupling is collided when playing out tubing string in order to prevent, protrusion part 42
Upper end is provided with lead-in chamfered 421.In other embodiments, bottom injection well downhole flow regulator draining hole can also use knot in the prior art
Structure, i.e. bottom injection well downhole flow regulator draining hole towards being arranged radially, but pipeline connect at this time with bottom injection well downhole flow regulator draining hole it is easy by
To collision, the pipeline service life is lower.
As shown in Figure 3 and Figure 4, during inclined shaft current divider 8 includes the central passage 81 being connected to bottom tapping pipe 16 and is in
The annulus access 84 that 81 periphery of heart channel is connected to shunting interval 18.Also have on inclined shaft current divider 8 and is connected to central passage 81
Bottom water distribution by-pass prot 821 and middle part water distribution by-pass prot 822, bottom water distribution by-pass prot 821 and middle part water distribution by-pass prot 822 divide
It is not connected to the draining hole of the bottom injection well downhole flow regulator draining hole 41 of bottom injection well downhole flow regulator 4 and middle part injection well downhole flow regulator.In the present embodiment, for side
Just it processes, inclined shaft current divider 8 is split type structure, including upper tap 82 and lower tap 83, on lower tap 83
End inserts in supreme tap 82 and forms annulus access 84 between lower tap 83 and upper tap 82, and center is logical
Road 81 runs through upper tap 82 and lower tap 83, and bottom water distribution by-pass prot 821 and the setting of middle part water distribution by-pass prot 822 exist
On upper tap 82.In other embodiments, inclined shaft current divider is also possible to integral structure, but at this time manufacturing cost compared with
Height, and be inconvenient to repair.
5 lower end of bottom inclined shaft pipeline drawn on 821 upper end of bottom water distribution by-pass prot and bottom injection well downhole flow regulator 4 is connect, middle part
3 lower end of middle part inclined shaft pipeline drawn on 822 upper end of water distribution by-pass prot and middle part injection well downhole flow regulator 2 is connect.Inclined shaft pipeline includes inclined shaft
Telescopic segment and inclined shaft fixed section, as shown in figure 5, inclined shaft telescopic segment includes the inner and outer tubes being mutually slidably matched, inclined shaft is flexible
The inner tube of section is successively welded by flexible top connection 311, telescoping inner 312, positioning joint 314, outside inclined shaft telescopic segment
Pipe is successively welded by anchor tip 313, outer telescopic tube 315, flexible lower contact 316, and positioning joint 314 plays in limitation
The effect of pipe abjection.As shown in fig. 6, inclined shaft fixed section pass through fixed top connection 321, fixing pipe 322, fixed lower contact 323 according to
It is secondary to be welded.
As shown in Figure 1, in the present embodiment, ball valve 6 is for making the flushing fluid in central passage 81 enter bottom injection well downhole flow regulator 4
It is interior, be convenient for well-flushing, the valve seat of ball valve 6 including hollow structure and the valve ball being arranged in valve seat, the upper and lower ends of valve seat respectively with
Bottom injection well downhole flow regulator 4 and inclined shaft current divider 8 connect, and when liquid flows into 6 lower section of ball valve above ball valve 6, ball valve 6 plays liquid
Barrier effect.When liquid flows into above ball valve 6 below ball valve 6 and has certain pressure, liquid opens valve ball, passes through valve
Hollow structure in seat flows into 6 upper space of ball valve.In other embodiments, ball valve is also possible to other kinds of check valve,
For example, cone valve etc..
Bottom tapping pipe 16 is connect with lower tap 83, and bottom tapping pipe 16 extends in bottom oil layer 21, middle part
Flow tube 17 is sleeved on the periphery of bottom tapping pipe 16, and the upper end of middle part isocon 17 is sealedly connected on middle part water distribution by-pass prot
On 82 outer wall of upper tap between 82 lower end of 822 upper ends and upper tap, middle part isocon 17 extends to bottom tapping
The bottom of pipe 16, and have between middle part isocon 17 and bottom tapping pipe 16 for extending to bottom oil from top oil reservoir 19
The shunting interval 18 of layer 21 shunts the grafting sealing being equipped in interval 18 for blocking the annular for shunting 18 bottom openings of interval
Device 13.
In the present embodiment, the installation length of inclined shaft pipeline is adjusted for convenience, inclined shaft pipeline is by inclined shaft telescopic segment and inclined shaft
Fixed section is constituted.In the remaining embodiments, inclined shaft pipeline can also be all made of inclined shaft fixed section.
The course of work of the separate injection tubing string of the utility model:
Step 1, put into top injection well downhole flow regulator 1 and bottom injection well downhole flow regulator 4 dead mouth blanking plug to by top with water flow passage and
Bottom is blocked with water flow passage, is launched cock blanking plug in middle part injection well downhole flow regulator 2 and is kept middle part unimpeded with water flow passage, from oil pipe 22
It suppresses into upper packer 10 and lower packet 12, continues to boost to the throttling opening of linker 11；
Step 2, the dead mouth blanking plug in top injection well downhole flow regulator 1 and bottom injection well downhole flow regulator 4 is changed to cock blanking plug, and adjusted stifled
The size of device water nozzle is filled in, guarantees that all water flow passages of matching are opened, by realizing that three-level fills the water with water flow passage as follows:
Match water flow passage in top: being connected by the inner cavity of oil pipe 22 with top injection well downhole flow regulator 1, and passes through the outer of top injection well downhole flow regulator 1
The top water-distributing gap biased on week realizes and fills the water to top oil reservoir 19 that is, the top water-distributing gap on the injection well downhole flow regulator 1 of top passes through top
It is filled the water with water flow passage into top oil reservoir 19.
Match water flow passage in middle part: being connected by the inner cavity of oil pipe 22 with middle part injection well downhole flow regulator 2, pass through the periphery of middle part injection well downhole flow regulator 2
After the draining hole of upper biasing, middle part inclined shaft pipeline 3, the middle part water distribution by-pass prot 822 of inclined shaft current divider 8, annulus access 84 are flowed through,
Centering is realized finally by throttling linker 11 into the shunting interval 18 between middle part isocon 17 and bottom tapping pipe 16
Portion's oil reservoir 20 fills the water, i.e., is filled the water with water flow passage to middle part oil reservoir 20 by middle part.
Match water flow passage in bottom: being connected by the inner cavity of oil pipe 22 with bottom injection well downhole flow regulator 4, pass through the periphery of bottom injection well downhole flow regulator 4
After the bottom injection well downhole flow regulator draining hole 41 of upper biasing, the bottom water distribution by-pass prot 821 of inclined shaft current divider 8, inclined shaft current divider 8 are flowed through
Central passage 81 is filled the water by the inner cavity of bottom tapping pipe 16, grafting sealer 13 and screen casing 14 into bottom oil layer 21 again, i.e.,
It is filled the water with water flow passage into bottom oil layer 21 by bottom.
The separate injection tubing string of the utility model can be also used for well-flushing work, and the course of work is as follows:
It is greater than the hydraulic medium of the backwash valve of packer by casing injection pressure, pushes ball valve 6 open, reaches at the top of oil pipe,
Enter out of throttling linker 11 simultaneously and shunts interval 18, by inclined shaft current divider 8, middle part inclined shaft pipeline 3, middle part injection well downhole flow regulator 2,
Reach at the top of oil pipe, completes well-flushing.
Claims (5)
1. separate injection tubing string, including top injection well downhole flow regulator, middle part injection well downhole flow regulator, bottom injection well downhole flow regulator and the shunting dress being sequentially connected in series from the top down
It sets, the upper packer for separating top oil reservoir and middle part oil reservoir is connected on the periphery of part flow arrangement, and separate middle part oil
The lower packet of layer and bottom oil layer, part flow arrangement include bottom tapping pipe for being connected to bottom oil layer and are set on bottom
The middle part isocon of part flow tube periphery, middle part isocon surround the shunting interval being connected to middle part oil reservoir with bottom tapping pipe,
Upper packer and lower packet are each attached on the isocon of middle part, are further fixed on the isocon of middle part in upper packer and lower envelope
For being connected to the throttling linker for shunting interval with middle part oil reservoir between device, which is characterized in that bottom injection well downhole flow regulator is matched for bias
Hydrophone, part flow arrangement include the inclined shaft current divider below the injection well downhole flow regulator of bottom, and inclined shaft current divider has and bottom tapping Guan Lian
Logical central passage and the annulus access being connected in central passage periphery with shunting interval, inclined shaft current divider and eccentric injection mandrel
Between be provided with the check valve for entering the flushing fluid in central passage in the injection well downhole flow regulator of bottom, also have on inclined shaft current divider
The bottom water distribution by-pass prot and middle part water distribution by-pass prot of heart channel connection, bottom water distribution by-pass prot and middle part water distribution by-pass prot difference
It is connected to the draining hole of the draining hole of bottom injection well downhole flow regulator and middle part injection well downhole flow regulator.
2. separate injection tubing string according to claim 1, it is characterised in that: the inclined shaft current divider includes upper tap under
Tap, lower tap upper end insert in supreme tap and form institute between lower tap and upper tap
Annulus access is stated, the central passage runs through upper tap and lower tap, and the bottom water distribution by-pass prot and middle part are matched
Water by-pass prot is arranged on upper tap.
3. separate injection tubing string according to claim 1 or 2, it is characterised in that: the drainage mouth down of the bottom injection well downhole flow regulator is set
It sets, the lower end of protrusion part is arranged in the protrusion part of the side setting of bottom injection well downhole flow regulator, the draining hole.
4. separate injection tubing string according to claim 3, it is characterised in that: it is oblique that the upper end of the protrusion part is provided with guidance
Face.
5. separate injection tubing string according to claim 1 or 2, it is characterised in that: bottom water distribution by-pass prot and middle part water distribution bypass
Hole is connected to the draining hole of the draining hole of bottom injection well downhole flow regulator and middle part injection well downhole flow regulator respectively by inclined shaft pipeline, the inclined shaft pipeline packet
Inclined shaft telescopic segment and inclined shaft fixed section are included, inclined shaft telescopic segment includes the inner and outer tubes being mutually slidably matched, and inner tube protrudes into outer tube
Interior part is equipped with the positioning joint of limitation inner tube abjection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821692954.3U CN209195382U (en) | 2018-10-18 | 2018-10-18 | Separate injection tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821692954.3U CN209195382U (en) | 2018-10-18 | 2018-10-18 | Separate injection tubing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209195382U true CN209195382U (en) | 2019-08-02 |
Family
ID=67408297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821692954.3U Active CN209195382U (en) | 2018-10-18 | 2018-10-18 | Separate injection tubing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209195382U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12129745B2 (en) | 2023-02-24 | 2024-10-29 | Weatherford Technology Holdings, Llc | Deep gas-lift in compromised wells |
-
2018
- 2018-10-18 CN CN201821692954.3U patent/CN209195382U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12129745B2 (en) | 2023-02-24 | 2024-10-29 | Weatherford Technology Holdings, Llc | Deep gas-lift in compromised wells |
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