CN207093049U - A kind of separate injection tubing string for flushing - Google Patents
A kind of separate injection tubing string for flushing Download PDFInfo
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- CN207093049U CN207093049U CN201720944268.XU CN201720944268U CN207093049U CN 207093049 U CN207093049 U CN 207093049U CN 201720944268 U CN201720944268 U CN 201720944268U CN 207093049 U CN207093049 U CN 207093049U
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- outer tube
- packer
- tubing string
- tube
- flushing
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Abstract
The utility model discloses a kind of separate injection tubing string for flushing.The separate injection tubing string includes passing through the first packer that the first outer tube being set up in parallel and the second outer tube are connected with well head；The second packer being connected by the 4th outer tube with the lower end of the first packer；The distributor being connected by the 5th outer tube with the lower end of the second packer, the 3rd packer connected by the lower end of the 6th outer tube and distributor；And inner tube；Wherein, distributor includes the first passage of the 5th outer tube of connection and the 6th outer tube, and the second channel of the inner chamber of the 5th outer tube of connection and sleeve pipe；And second outer tube, the 4th outer tube, the 5th outer tube, the 6th outer tube coaxial line, the upper end of inner tube are located at the inside of the second outer tube and connect well head, lower end is located in first passage.Stratum has been divided by the first to the 3rd packer, separate fluid passage is provided for three stratum by above-mentioned tubing string and distributor, has avoided frequently transferring blanking plug, has simplified operation, has improved water-injection efficiency.
Description
Technical field
It the utility model is related to technical field of oil production engineering, more particularly to a kind of separate injection tubing string for flushing.
Background technology
Enter the middle and later periods with the exploitation in oil field, stratum energy is constantly decayed, and stratum energy decay increases oil extraction
Difficulty so that crude oil is difficult to separate from stratum.Generally for solving the problems, such as stratum energy decay increase exploitation difficulty, generally
Using to supplementing stratum energy by the way of the water filling of stratum.Especially, for heterogeneous reservoir, due between Different Strata
Capacity volume variance is larger, causes when carrying out water injection work, the water absorption between Different Strata is uneven.Therefore in order to meet differently
Layer supplements stratum energy using stratified injection water technology, i.e., injects different amounts of water to Different Strata to the demand of energy.
In the prior art, by into oil well casing tripping in eccentric separated-injection tubing string carry out stratified injection water technology.Specifically,
Eccentric separated-injection tubing string include pass through oil pipe connection multiple packers and multiple eccentric injection mandrels, and packer and partially
The alternate setting of heart injection well downhole flow regulator.The delivery port of connection oil pipe inner chamber and cannula cavity is provided with eccentric injection mandrel.The eccentric separated-injection
Tubing string when in use, first by packer setting on oil well casing, by different formation isolations.After setting, to stratum
Carry out water suction and measure tune, it is stratum supplement energy institute water requirement to ensure irrigated water.Specifically, first using flowmeter
Water absorption on each stratum of downhole testing.Afterwards according to the water absorption situation on each stratum and injection allocation requirement, using pulling and running tool to
The quantitative blanking plug of tripping in respective model in eccentric injection mandrel.The water suction of each layer is surveyed after quantitative blanking plug tripping in is installed
Amount, if needing to put into new quantitative blanking plug again after blanking plug is pulled out in the presence of the layer position for not reaching water absorption requirement, directly
Untill the stratum water absorption tested meets the requirements.After completing to allocate, then seperated layer water injection can be carried out.
During the utility model is realized, designer has found that prior art at least has problems with：
In eccentric separate layer water injection string provided in prior art, the delivery port at Different Strata shares a water filling and led to
Road, it is therefore desirable to, it is necessary to size using eccentric injection mandrel and blanking plug adjusting water outlet mouth when adjusting Different Strata water injection rate.
And then need frequently to utilize pulling and running tool to salvage the latter's tripping in blanking plug during eccentric injection mandrel and blanking plug is used, no
Only cumbersome, workload is big, while pulling and running tool easily occurs during tripping in pulling and running tool and meet the situation that card is hampered,
Influence project progress.Further, since the delivery port of Different Strata shares a waterflood path, therefore irrigated to Different Strata
Medium must be identical.So when medium difference needed for medium needed for one of stratum and other stratum, prior art is utilized
The eccentric separate layer water injection string of middle offer can not meet that exploitation requires.
Utility model content
In order to solve to need in the prior art frequent tripping in pulling and running tool caused by being constructed it is cumbersome, workload is big
The problem of, the utility model embodiment provides a kind of oil well separate injection tubing string and its application method, and the technical scheme is specific as follows：
The utility model embodiment provides a kind of separate injection tubing string for flushing, and the tubing string is arranged on sleeve pipe
It is interior, and the tubing string includes：
The first packer being connected by the first outer tube being set up in parallel and the second outer tube with well head；
The second packer being connected by the 4th outer tube with the lower end of first packer；
The distributor being connected by the 5th outer tube with the lower end of second packer,
The 3rd packer being connected by the 6th outer tube with the lower end of the distributor；
And inner tube；Wherein,
The distributor includes the first passage for connecting the 5th outer tube and the 6th outer tube, and connection described the
The second channel of the inner chamber of five outer tubes and described sleeve pipe；
And second outer tube, the 4th outer tube, the 5th outer tube, the 6th outer tube coaxial line, said inner tube
Upper end be located at the inside of second outer tube and connect well head, lower end is located in the first passage.
Alternatively, in the distributor, the first passage includes the first paragraph and second being sequentially connected with from top to bottom
Section, the internal diameter of the first paragraph are more than the internal diameter of the second segment, and the internal diameter of the second segment is equal to the external diameter of said inner tube；Institute
State second channel and connect the first paragraph, the interior sealing that can be moved axially along the first paragraph is additionally provided with the first paragraph
Set, the inner seal sleeve can block the port that the second channel connects the first paragraph；And set on the inner seal sleeve
There are internal diameter and said inner tube to be located at the through hole that the external diameter of the part inside the first passage is adapted.
Alternatively, it is provided with shear pin between the inwall of the inner seal sleeve and the first paragraph.
Alternatively, said inner tube includes the oil pipe of connection well head, and the seal pipe being connected with the oil pipe bottom, described
Seal pipe is plugged in the through hole of the sealing shroud.
Alternatively, it is provided with sealing ring between the seal pipe and the sealing shroud.
Alternatively, the 3rd outer tube, the 3rd outer tube and described first are also associated with below second packer
Outer tube coaxial line.
Alternatively, the first screen casing and the first plug are connected with turn from top to bottom in the bottom of the 3rd outer tube.
Alternatively, the 7th outer tube, the 7th outer tube and the described 6th are also associated with below the 3rd packer
Outer tube coaxial line.
Alternatively, sliding sleeve, the second screen casing and second are connected with turn from top to bottom in the bottom of the 7th outer tube
It is stifled.
The beneficial effect brought of technical scheme that the utility model embodiment provides is：
The separate injection tubing string for flushing provided by the utility model embodiment, can be respectively that three stratum carry
For separate water inlet, waterflood path and delivery port.Therefore when in use, without according to passing through adjustment in the prior art
The mode of delivery port size regulates and controls water, only in well head the priming charge amount into waterflood path need to be controlled to complete, entered
And avoid frequently using blanking plug below pulling and running tool, seperated layer water injection operation is simplified, improves the efficiency of water injection work.
And due to independently of each other, not interfere with each other between waterflood path, therefore tubing string adaptation pressure difference is big.In addition, for Different Strata
Between the species of injected media do not limit, differently intermediary water and polymer can be realized by separate waterflood path
Alternately inject, meet exploitation demand.
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 a kind of structural representation for separate injection tubing string for flushing that the utility model embodiment provides；
Fig. 2 is that the structure of distributor in a kind of separate injection tubing string for flushing that the utility model embodiment provides is shown
It is intended to.
Each mark is respectively in accompanying drawing：
Ith, the first water filling layer；IIth, the second water filling layer, the III, the 3rd water filling layer；
101st, the first outer tube, the 102, second outer tube, the 103, the 3rd outer tube, the 104, the 4th outer tube, the 105, the 5th outer tube, 106,
6th outer tube, the 107, the 7th outer tube；
2A, the first packer, 2B, the second packer, 2C, the 3rd packer；
3rd, distributor, 31, inner seal sleeve, 32, shear pin；
4th, inner tube, 41, seal pipe；
51st, the first screen casing, the 52, second screen casing；
61st, the first plug, the 62, second plug；
7th, sliding sleeve.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type embodiment is described in further detail.
The utility model embodiment provides a kind of separate injection tubing string for flushing, is arranged in sleeve pipe, such as Fig. 1 institutes
Show, the tubing string includes：
The first packer 2A being connected by the first outer tube 101 being set up in parallel and the second outer tube 102 with well head；
The second packer 2B being connected by the 4th outer tube 104 with the first packer 2A lower end；
The distributor 3 being connected by the 5th outer tube 105 with the second packer 2B lower end,
The 3rd packer 2C being connected by the 6th outer tube 106 with the lower end of distributor 3；
And inner tube 4；Wherein,
Distributor 3 includes the first passage of the 5th outer tube 105 of connection and the 6th outer tube 106, and the 5th outer tube 105 of connection
With the second channel of the inner chamber of sleeve pipe；
And second outer tube 102, the 4th outer tube 104, the 5th outer tube 105, the coaxial line of the 6th outer tube 106, the upper end position of inner tube 4
In the inside of the second outer tube 102 and well head is connected, lower end is located in first passage.
The use principle for the separate injection tubing string for flushing that the utility model embodiment provides is as follows：
Difference according to stratum water requirement utilizes the first packer 2A, the second packer 2B and the 3rd packer 2C by ground
Layer is divided into three different water filling layers, is completed especially by packer setting.Referring to Fig. 1, after packer setting, first
Below packer 2A, more than the second packer 2B are the first water filling layer I；Below second packer 2B, more than the 3rd packer 2C
For the second water filling layer II；Below 3rd packer 2C is the 3rd water filling layer III.
It is afterwards above-mentioned first to the 3rd using each outer tube, inner tube and distributor after different injection layer is separated out
Water filling layer III provides three separate waterflood paths.
Specifically, the first waterflood path is the first outer tube 101.As shown in figure 1, due to being connected in the first outer tube 101
First packer 2A, and the first water filling layer I is located at the first packer 2A lower section, therefore connected by the first outer tube 101
One water filling layer I and well head.When in use, the end fluid injection of well head is connected to the first outer tube 101, liquid passes through above-mentioned first water filling
Passage and then the first water filling layer I of entrance.
Second waterflood path be annular space between the second outer tube 102, the 4th outer tube 104 and the 5th outer tube 105 and inner tube 4 with
And the second channel of distributor 3.As shown in figure 1, due to the second outer tube 102, the 4th outer tube 104 that connect in coaxial line and up and down
With inner tube 4, therefore the outer tube 102 of inner tube 4 and second, the 4th outer tube 104 and the shape of the 5th outer tube 105 are provided with the 5th outer tube 105
Into interconnected annular space.It is therefore to be understood that second channel connects the 5th outer tube 105 and set in distributor 3
Tube cavity, in particular to second channel connect the annular space between the 5th outer tube 105 and inner tube 4, and cannula cavity.And due to
The upper end connection well head of two outer tubes 102, distributor 3 is arranged at the second water filling layer II, therefore passes through the second outer tube the 102, the 4th
Continuous annular space between the outer tube 105 of outer tube 104 and the 5th and inner tube 4, and second channel form connection well head and second
3rd waterflood path of water filling layer II.When in use, the end of well head is connected by the annular space between the second outer tube 102 and inner tube 4
Portion's fluid injection, liquid passes through above-mentioned second fluid passage from second channel sleeve pipe inner chamber, and then enters the second water filling layer II.
3rd waterflood path is the inner chamber of the outer tube 106 of inner tube 4 and the 6th.As shown in figure 1, due in upper end connection well head
The lower end of pipe 4 is arranged in the first passage of distributor 3, and first passage has also connected downwards the 6th outer tube 106, while the 6th
The lower end of outer tube 106 has also connected the 3rd water filling layer III below the 3rd packer 2C, therefore passes through the outer tube of inner tube 4 and the 6th
106 form the 3rd waterflood path of connection well head and the 3rd water filling layer III.When in use, the end of well head is connected to inner tube 4
Fluid injection, liquid is by the 3rd fluid passage, into the 6th outer tube 106, and by entering the 3rd packer after the 3rd packer 2C
Cannula cavity below 2C, and then enter the 3rd water filling layer III.
It will be appreciated by persons skilled in the art that the two outer tube phases connected up and down and by packer positioned at packer
It is intercommunicated.
The separate injection tubing string for flushing provided by the utility model embodiment, can be respectively that three stratum carry
For separate water inlet, waterflood path and delivery port.Therefore when in use, without according to passing through adjustment in the prior art
The mode of delivery port size regulates and controls water, only in well head the priming charge amount into waterflood path need to be controlled to complete, entered
And avoid frequently using blanking plug below pulling and running tool, seperated layer water injection operation is simplified, improves the efficiency of water injection work.
Wherein, first the first outer tube of packer 2A connections 101, and the second outer tube 102 of coaxial line and the 4th outer tube
104, it is dual tubing packing.
And preferably the first packer 2A is that the two-tube set with grappling effect protects packer.When in use, the first packer
2A can anchor sleeve inwall, define motion of the pipe string along sleeve pipe axial and circumferential, avoid after setting dispense pipe string in sleeve
The middle situation for pipe string wriggling occur.
The 4th outer tube 104 and the 5th outer tube 105 of second packer 2B connection coaxial lines, it is single tube packer.
3rd packer 2C is connected to the 6th outer tube 106, is single tube packer.
In the utility model embodiment, the independent water outlet of the second water filling layer II is formd by the second channel of distributor 3
Mouth, the independent delivery port of the 3rd water filling layer III is formd by the first passage of distributor 3., it is necessary to say when using distributor 3
It is bright, the second channel of distributor 3 and it should be at sealed condition for the ease of packer smoothly, effectively set.And work as
After packer setting, then the second channel for needing to ensure distributor 3 keeps clear, and guarantee is normally carried out water injection work.
Based on above-mentioned requirements, for the structure of distributor 3, the utility model embodiment provides following alternative：
As shown in Fig. 2 in distributor 3, first passage includes the first paragraph and second segment being sequentially connected with from top to bottom, the
One section of internal diameter is more than the internal diameter of second segment, and the internal diameter of second segment is equal to the external diameter of inner tube 4.Also, second channel connection first
Section, is additionally provided with the inner seal sleeve 31 that can be moved axially along first paragraph in the first paragraph, and inner seal sleeve 31 can block second channel
Connect the port of first paragraph；Internal diameter is provided with inner seal sleeve 31 simultaneously with inner tube 4 to be located at outside the part inside first passage
The through hole that footpath is adapted.
The use principle of the distributor 3 is：
It is preferred, it is to be understood that first paragraph the 5th outer tube 105 of connection, second segment the 6th outer tube 106 of connection, and the
One section of internal diameter is more than the internal diameter of second segment, and the internal diameter of second segment is equal to the external diameter of inner tube 4.In this way, when in first passage
When inserting inner tube 4, annular space is there are between inner tube 4 and first passage.Also, second channel has also connected first paragraph, first paragraph
The 5th outer tube 105 is connected.Such second channel connects the 5th outer tube 105 and interior by the annular space between first paragraph and inner tube 4
Annular space between pipe 4.
Also, the inner seal sleeve 31 that can be moved axially along first passage is provided with first passage, and when not setting,
The inner seal sleeve 31 has blocked the connection of second channel and first paragraph, realizes the sealing of distributor 3 during setting.Simultaneously
When in use, the through hole that inner tube 4 is inserted on inner seal sleeve 31, so when inner tube 4 continues traveling downwardly, can drive the first sealing shroud
311 no longer block second channel along first paragraph DL synchronization, now inner seal sleeve 31, realize second channel and the 5th outer tube
105 connection.
Wherein, it is not specifically limited, can matches with the external diameter of inner tube 4 for the shape of through hole in inner seal sleeve 31
Manhole, or as shown in figure 1, the through hole of the upper end of inner seal sleeve 31 is in funnel-form, i.e., the through hole is close to the 5th outer tube 105
Inner end diameter is gradually reduced downwards.And correspondingly, the bottom diameter of preferably the 5th outer tube 105 is equally gradually reduced, and with it is interior close
The slope of the funnel-form through hole of big envelope 31 is identical.So when opening the connection of second channel and the 5th outer tube 105, the 5th outer tube
Liquid between 105 and inner tube 4 in annular space can progressively be passed through second channel, avoid big quantity of fluid from being passed through second channel and cause injection allocation
The structural failure of device 3.
Further, in order to ensure that packer setting stage inner seal sleeve 31 can stably block second channel, do not go out
Situation about now sliding downwards, shear pin 32 is provided between inner seal sleeve 31 and first paragraph inwall, ensure that inner seal sleeve
31 stability.Wherein it is not specifically limited for the quantity of shear pin 32, for example with 2,4,6 etc..
Meanwhile at least one sealing ring is additionally provided with the inner chamber of inner seal sleeve 31, strengthened by the sealing ring interior
Sealing shroud 31 and the being tightly combined property of inner tube 4.Ensure that inner seal sleeve 31 can be driven synchronous so when moving down using inner tube 4
It is descending, and then smoothly open the connection of second channel and the 5th outer tube 105.Wherein specific limit is not done for the quantity of sealing ring
It is fixed, such as 2,3,4 etc..
Further, in the utility model embodiment, formed by the first outer tube 101 being connected with the first packer 2A
The independent delivery port of first water filling layer I, the 3rd water filling layer III is formd by being connected the 7th outer tube 107 with the 3rd packer 2C
Independent delivery port, more specifically, as shown in Figure 1：
For the first water filling layer I, be also associated with the 3rd outer tube 103 below the first packer 2A, the 3rd outer tube 103 with
The connection of first outer tube 101 and coaxial line.The delivery port of the first water filling layer I is formd by the bottom of the 3rd outer tube 103.More specifically
Ground, the first screen casing 51 and the first plug 61 are connected with turn from top to bottom in the bottom of the 3rd outer tube 103.Outside first
The liquid that pipe 101, the first packer 2A enter in the 3rd outer tube 103 can enter the first water filling by the sieve aperture on the first screen casing 51
Layer I.Wherein, the first screen casing 51 serves the effect of barrier impurity, avoids the 3rd outer tube 103 from being blocked.
For the 3rd water filling layer III, the 7th outer tube 107, the 6th outer tube 106 are also associated with below the 3rd packer 2C
Simultaneously coaxial line is connected with the 7th outer tube 107.The delivery port of the 3rd water filling layer III is formd by the bottom of the 7th outer tube 107.More
Specifically, sliding sleeve 7, the second screen casing 52 and the second plug 62 are also connected with turn from bottom to top in the bottom of the 7th outer tube 107.
Wherein understandable to be, the second screen casing 52 and the second plug 62 serve filtration, ensure the smooth of the 7th outer tube 107；
Sliding sleeve 7 then ensure that smoothly setting for the first to the 3rd packer.
In the utility model embodiment, the first outer tube 101, the second outer tube 102, the 3rd outer tube 103, the 4th outer tube 104,
Five outer tubes 105, the 6th outer tube 106, the 7th outer tube 107 can use Big Inch (oil pipe being relatively large in diameter), and inner tube 4 can use
The form that little oil pipe (i.e. the less oil pipe of diameter) and seal pipe are combined, and the external diameter of seal pipe is less than the external diameter of little oil pipe.
Specifically, inner tube 4 includes the little oil pipe into drifting mouth and the seal pipe 41 that is fixedly connected with little oil pipe lower end, due to sealing
The surface of pipe is more smooth compared with the surface of oil pipe, thus be easier to the stable bond of inner seal sleeve 31, can effectively drive in
Sealing shroud 31 is descending, and the situation of inner seal sleeve 31 can not be driven by avoiding the occurrence of inner tube 4.Also, the lower end of seal pipe 41 may pass through
Distributor 3 enters in the 6th outer barrel 106, avoids the first passage liquid body in sealing shroud 31 and note device 3 from acting on and corruption occurs
Erosion.
The separate injection tubing string for flushing provided by the utility model embodiment, it is each provided with for three water filling layers
Separate waterflood path, so the water of Different Strata can be carried out by the water for controlling ground to be injected to different injection passage
Amount regulation and control.It ensure that and not interfere with each other between each stratum.In addition, without frequently tripping in pulling and running tool etc. into well, it is easy to scene
Production management.Further, terrestrial operation can complete underground quantity water distribution so that the water distribution quantity control on each stratum is more smart
Really, regulation is more convenient, has the advantages that reliable operation, easy to operate, easy to maintain.Finally, the utility model embodiment provides
Separate injection tubing string can be additionally used in water filling or polymer etc. into three stratum, have a wide range of application.
The stratified injection water technology for the separate injection tubing string for flushing that the utility model embodiment provides, is specifically included：
Step 1: assemble pipe string：It is sequentially connected with the first outer tube 101, the first packer 2A；
It is sequentially connected with the second outer tube 102, the first packer 2A, the 4th outer tube 104, the second packer 2B, the 5th outer tube
105th, distributor 3, the 6th outer tube 106, the 3rd packer 2C；
Step 2: the running string into sleeve pipe：By in the above-mentioned pipe string tripping in sleeve pipe assembled, and cause the first packer
2A is located above the first water filling layer；Second packer 2B is located at below the first water filling layer, above the second water filling layer；3rd packer
2C is located at below the second water filling layer；
Step 3: packer setting：Being suppressed by oil pipe makes the first packer 2A, the second packer 2B and the 3rd packing
Device 2C is set；
Step 4: insertion inner tube：Inner tube 4 is inserted into the second outer tube 102, and in the bottom insertion distributor 3 of inner tube 4
In first passage；
Step 5: seperated layer water injection：By the first outer tube 101 to the first water filling layer water filling；Pass through the second outer tube 102 and inner tube
4 annular space is to the second water filling layer water filling；By inner tube 4 to the 3rd water filling layer water filling.
Specifically, in step 4, also need to ensure that inner tube 4 is inserted in inner seal sleeve 31, and drive inner seal sleeve 31 descending,
The shear pin 32 of first passage and inner seal sleeve 31 is disconnected, opens the delivery port of the second water filling layer II.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (9)
1. a kind of separate injection tubing string for flushing, it is arranged in sleeve pipe, it is characterised in that the tubing string includes：
The first packer (2A) being connected by the first outer tube (101) and the second outer tube (102) that are set up in parallel with well head；
The second packer (2B) being connected by the 4th outer tube (104) with the lower end of first packer (2A)；
The distributor (3) being connected by the 5th outer tube (105) with the lower end of second packer (2B),
The 3rd packer (2C) being connected by the 6th outer tube (106) with the lower end of the distributor (3)；
And inner tube (4)；Wherein,
The distributor (3) includes connecting the first passage of the 5th outer tube (105) and the 6th outer tube (106), and
Connect the second channel of the inner chamber of the 5th outer tube (105) and described sleeve pipe；
And second outer tube (102), the 4th outer tube (104), the 5th outer tube (105), the 6th outer tube (106)
Coaxial line, the upper end of said inner tube (4) are located at the inside of second outer tube (102) and connect well head, and lower end is positioned at described the
In one passage.
2. the separate injection tubing string according to claim 1 for flushing, it is characterised in that in the distributor (3),
The first passage includes the first paragraph and second segment being sequentially connected with from top to bottom, and the internal diameter of the first paragraph is more than described
The internal diameter of second segment, the internal diameter of the second segment are equal to the external diameter of said inner tube (4)；
The second channel connects the first paragraph, is additionally provided with what can be moved axially along the first paragraph in the first paragraph
Inner seal sleeve (31), the inner seal sleeve (31) can block the port that the second channel connects the first paragraph；
And the part that internal diameter is located at said inner tube (4) inside the first passage is provided with the inner seal sleeve (31)
The through hole that external diameter is adapted.
3. the separate injection tubing string of flushing according to claim 2, it is characterised in that in the inner seal sleeve (31) and institute
State and be provided with shear pin (32) between the inwall of first paragraph.
4. the separate injection tubing string according to claim 2 for flushing, it is characterised in that said inner tube (4) includes connecting
The oil pipe of well head, and the seal pipe (41) being connected with the oil pipe bottom are connect, the seal pipe (41) is plugged on the sealing
In the through hole for covering (31).
5. the separate injection tubing string according to claim 4 for flushing, it is characterised in that in the seal pipe (41) and
Sealing ring is provided between the sealing shroud (31).
6. the separate injection tubing string according to claim 1 for flushing, it is characterised in that in second packer
The 3rd outer tube (103), the 3rd outer tube (103) and the first outer tube (101) coaxial line are also associated with below (2B).
7. the separate injection tubing string according to claim 6 for flushing, it is characterised in that in the 3rd outer tube
(103) bottom is connected with the first screen casing (51) and the first plug (61) in turn from top to bottom.
8. the separate injection tubing string according to claim 1 for flushing, it is characterised in that in the 3rd packer
The 7th outer tube (107), the 7th outer tube (107) and the 6th outer tube (106) coaxial line are also associated with below (2C).
9. the separate injection tubing string according to claim 8 for flushing, it is characterised in that in the 7th outer tube
(107) bottom is connected with sliding sleeve (7), the second screen casing (52) and the second plug (62) in turn from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720944268.XU CN207093049U (en) | 2017-07-31 | 2017-07-31 | A kind of separate injection tubing string for flushing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720944268.XU CN207093049U (en) | 2017-07-31 | 2017-07-31 | A kind of separate injection tubing string for flushing |
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| Publication Number | Publication Date |
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| CN207093049U true CN207093049U (en) | 2018-03-13 |
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| CN201720944268.XU Active CN207093049U (en) | 2017-07-31 | 2017-07-31 | A kind of separate injection tubing string for flushing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322646A (en) * | 2017-07-31 | 2019-02-12 | 中国石油天然气股份有限公司 | A kind of separate injection tubing string and application method for flushing |
| CN110965971A (en) * | 2019-12-12 | 2020-04-07 | 东北石油大学 | Annular simulation device for water injection well |
-
2017
- 2017-07-31 CN CN201720944268.XU patent/CN207093049U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322646A (en) * | 2017-07-31 | 2019-02-12 | 中国石油天然气股份有限公司 | A kind of separate injection tubing string and application method for flushing |
| CN109322646B (en) * | 2017-07-31 | 2023-10-31 | 中国石油天然气股份有限公司 | Separate injection pipe column for oil well water injection and use method |
| CN110965971A (en) * | 2019-12-12 | 2020-04-07 | 东北石油大学 | Annular simulation device for water injection well |
| CN110965971B (en) * | 2019-12-12 | 2020-09-22 | 东北石油大学 | Annular simulation device for water injection well |
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