CN106437645B - Separate water injection well automatic reverse injection well downhole flow regulator and its application method - Google Patents
Separate water injection well automatic reverse injection well downhole flow regulator and its application method Download PDFInfo
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- CN106437645B CN106437645B CN201610968450.9A CN201610968450A CN106437645B CN 106437645 B CN106437645 B CN 106437645B CN 201610968450 A CN201610968450 A CN 201610968450A CN 106437645 B CN106437645 B CN 106437645B
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- water
- valve
- injection well
- flow regulator
- downhole flow
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 238000002347 injection Methods 0.000 title claims abstract description 117
- 239000007924 injection Substances 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000011010 flushing procedure Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000001459 mortal effect Effects 0.000 claims description 2
- 235000020681 well water Nutrition 0.000 claims description 2
- 239000002349 well water Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 208000015181 infectious disease Diseases 0.000 abstract description 3
- 239000008398 formation water Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention is separate water injection well automatic reverse injection well downhole flow regulator and its application method, is suitable for separated-zone water infection oil field well.This injection well downhole flow regulator includes top connection and lower contact, and outer tube is connected between top connection and lower contact, and inner tube and the inner cavity connection of top connection, the formation water filling ring cavity between inner tube and outer tube, water injection hole are radially arranged in water filling ring cavity；The tube wall of inner tube, which is equipped in upper flowing hole and lower flowing hole, lumen, is equipped with upper valve and lower valve, lower valve slow closing device is equipped in the inner tube between upper valve and lower valve, this injection well downhole flow regulator is corresponding with water filling layer position, is connected in water injection string.The present invention can be used cooperatively with other injection allocation tools in water injection string, can switch operation according to Geologic Requirements, improve the feasibility of rotation water flood operations, achieve the purpose that specific aim subdivision injection.Structure of the invention is simple, manufacture is easy, using with it is adaptable, easy to operate, convenient, using effect is significant.
Description
Technical field
The present invention relates to the water-filling method of petroleum industry water injection well and underground water-injection tool, especially separate water injection well are automatic
Commutate injection well downhole flow regulator and its application method, is suitable for separated-zone water infection oil field well, can be to underground without tripping in supplementary instrument and equipment
Water filling layer position rotation water filling.
Background technique
For separated-zone water infection oil field well when water filling layer position rotation fills the water, usually used injection well downhole flow regulator and construction method are for example following:
1, retrievable type injection well downhole flow regulator and its construction method: using the fishing-vehicle of well head, tripping in has the instrument of fishing head, pulling
Sum with water injection hole is filled the water without the water distributing core of water injection hole and is stopped note operation.
2, the water distributing core of open-core type injection well downhole flow regulator is located at injection well downhole flow regulator center, and fuse outer wall has sealing ring, is between sealing ring
Apopore guarantees that injection water will not flow out between fuse outer wall and injection well downhole flow regulator inner wall；Apopore can be different with installation dimension
Water nozzle completes injection allocation.It is fishing-vehicle when well head operates pulling using defect, is easy to appear and can not fish out or throw not in place show
As, not only waste of manpower, material resources, and effect is poor.
3, the water distributing core of centering type injection well downhole flow regulator is located at the side of injection well downhole flow regulator, sets water hole in fuse, guarantees the big of water yield
It is small.It is that water distributing core is not placed in the middle using defect, and pulling difficulty is big, and success rate is low.
In conclusion current seperated layer water injection facility and technique exist working procedure it is various, use power-equipment and
Personnel are more, and construction cost is high and operation difficulty is big, is difficult to the defects of effectively implementing.Production scene needs a kind of simple and effective
Water dispensing apparatus and construction method solve the above problems.
Summary of the invention
The object of the present invention is to provide separate water injection well automatic reverse injection well downhole flow regulator and its application methods, and existing layering is overcome to infuse
Injection well downhole flow regulator used in well changes the defect that operation difficulty is big, construction cost is high when layer fills the water, the branch without extrinsic motive equipment
It holds, that completes separate water injection well changes a layer water flooding construction.Reduce production cost, improve working efficiency, guarantee water filling it is working properly into
Row.
The technical solution of the invention is as follows:
Separate water injection well automatic reverse injection well downhole flow regulator includes top connection and lower contact, is connected between top connection and lower contact outer
The inner cavity connection of pipe, inner tube and top connection forms water filling ring cavity between inner tube and outer tube, and water injection hole is radially arranged in water filling ring
In chamber；The tube wall of inner tube, which is equipped in upper flowing hole and lower flowing hole, lumen, is equipped with upper valve and lower valve, in upper valve under
Lower valve slow closing device is equipped in inner tube between valve.
Using the method for separate water injection well automatic reverse injection well downhole flow regulator, it is:
A, automatic reverse injection well downhole flow regulator is corresponding with water filling layer position, be connected in water injection string；
B, first lower part water filling layer position is filled the water；
C, top is filled the water after the water injection pressure of lower part water filling layer position is higher than the starting pressure of automatic reverse injection well downhole flow regulator, again
The water filling of layer position.
Compared with prior art, the present invention has following significant using effect:
1, this injection well downhole flow regulator is equipped with two waterflood paths, and one by top connection, upper flowing hole, water filling ring cavity and lower contact group
At the water filling layer position that, this waterflood path is poor for water absorbing capacity, starting pressure is high, the note for injecting water between inner tube and outer tube is allowed
Water ring chamber is injected through lower contact.Under lower valve top dome is then opened, is opened by the backwash water that lower contact enters by another waterflood path
The ball seat hole of valve seat, lower valve ball are along lower valve slow closing device uplink, before lower valve ball is not yet fallen after rise, close surface well
The inverse well-flushing valve of mouth, the water injection valve for opening ground well head make to inject water from upper flowing hole, water filling ring cavity, lower flowing hole, lower valve
The ball seat hole and water injection hole of seat are injected into water filling layer position.The water filling layer that the waterflood path is good for water absorbing capacity, starting pressure is low
Position, since the pressure of injection water is greater than the pressure that lower valve ball falls, lower valve ball cannot be fallen after rise, this water filling layer position is enable to protect
Hold normal water filling.The switch operation of two waterflood paths is the water injection valve and inverse well-flushing valve by operating ground well head, by anti-
Wash water pushes the relative motion of upper valve ball and lower valve ball and upper valve seat and lower valve seat in automatic reverse injection well downhole flow regulator to be able to
It realizes, avoids the defect that extrinsic motive equipment auxiliary realizes water filling layer position conversion.
2, portion's water filling layer position easily can be first poured down using the present invention, infuse top water filling layer position again.Due to of the invention
Lower valve slow closing device is equipped in injection well downhole flow regulator, when being switched by injecting lower part water filling layer position to inject top water filling layer position, Neng Gou
Lower valve ball fall to before lower valve seat just make to inject water be injected into the water filling layer position of top through the ball seat hole of lower valve seat and
It is able to maintain normal water filling.
3, the present invention can be used cooperatively with other injection allocation tools in water injection string, can switch and grasp according to Geologic Requirements
Make, improves the feasibility of rotation water flood operations, achieve the purpose that specific aim subdivision injection.
4, structure of the invention is simple, manufacture is easy, using with it is adaptable, easy to operate, convenient, using effect is aobvious
It writes, realizes that rotation water filling can exempt the cooperation of external equipment for separate water injection well, significantly reduce production cost, improve
Working efficiency alleviates labor intensity, has significant economic benefit and social benefit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of injection well downhole flow regulator.
Specific embodiment
The present invention is described in detail below in conjunction with attached drawing, is not limited the scope of the invention, it is all to be thought using design of the invention
The improvement that rood goes out belongs to protection category of the invention.
Referring to Fig. 1, separate water injection well automatic reverse injection well downhole flow regulator includes top connection 1 and lower contact 11, top connection 1 and lower contact
Outer tube 6, inner tube 5 and the inner cavity connection of top connection 1, the formation water filling ring cavity between inner tube 5 and outer tube 6, water filling are connected between 11
Hole 10 is radially arranged in water filling ring cavity；The tube wall of inner tube 5 is equipped in upper flowing hole 2 and lower flowing hole 8, lumen equipped with upper all
You and lower valve are equipped with lower valve slow closing device in the inner tube 5 between upper valve and lower valve.
The lower valve slow closing device includes hindering lower block 4 and baffle 7, and one end of baffle 7 is fixed on lower 8 top of flowing hole
On tube wall, hinders lower block 4 interval and be fixed on the tube wall between baffle 7 and upper valve in opposite directions.
Hindering lower block 4 is the semicircle blocks being consistent with 5 cavity radius of inner tube.
The longitudal section of block 4 is the bevel edge triangle oblique to tube wall from the center line of inner tube 5 under the resistance.
The baffle 7 is strip metal plate that both ends are consistent with the tube wall of inner tube 5, flexible.Such as spring leaf, aluminium
Piece, copper sheet, stainless steel substrates etc., when the water flow with certain pressure passes through, baffle 7 on bullet or can be depressed.
The upper valve is fixed in the inner tube 5 of 2 lower section of flowing hole, and upper valve includes upper valve seat, 3 and of upper valve ball
Ball cover, upper valve ball 3 cooperate with upper valve seat, and ball cover is equipped with liquid flow hole, is fixed in the inner tube 5 of 3 top of valve ball.
The lower valve is fixed in the inner tube 5 between lower flowing hole 8 and water injection hole 10, equipped with lower valve ball 9 and is descended to the mortal world
That seat, lower valve ball 9 cooperate with lower valve seat.
The upper valve and lower valve are single stream valves, only allow water flow from the lower section of upper valve and lower valve upwards
It flows through, that is, only backwash water stream when anti-flushing well is allowed to pass through.
The water injection hole 10 is arranged in the water filling ring cavity below lower valve, is connected to water filling layer position and inner tube 5.
Using the method for separate water injection well automatic reverse injection well downhole flow regulator, it is:
A, automatic reverse injection well downhole flow regulator is corresponding with water filling layer position, be connected in water injection string；
B, first lower part water filling layer position is filled the water；
C, top is filled the water after the water injection pressure of lower part water filling layer position is higher than the starting pressure of automatic reverse injection well downhole flow regulator, again
The water filling of layer position.
Automatic reverse injection well downhole flow regulator is connected to above the packer in water injection string corresponding with top water filling layer position, with
Only need to connect a conventional injection well downhole flow regulator below packer in the corresponding water injection string of lower part water filling layer position.
When to the water filling of lower part water filling layer position, opens the water injection valve of ground well head, closes the inverse well-flushing valve of ground well head, injection
Water enters in the conventional injection well downhole flow regulator below packer through top connection 1 and upper flowing hole 2 along water filling ring cavity downlink, from lower contact 11,
It is injected into the water filling layer position of lower part.
When to the water filling of top water filling layer position, the inverse well-flushing valve of the water injection valve, opening ground well head of closing ground well head is carried out
Anti-flushing well, injection water enter inner tube 5 from lower contact 11 and open lower valve ball 9, and lower valve ball 9 is made to open baffle 7 along resistance
The lower section of valve seat in lower piece of 4 block-by-block uplinks, arrival, anti-flushing well water flow are flowed out from top connection 1；After anti-flushing well, close ground
The inverse well-flushing valve of face well head, upper valve ball 3 fall the ball seat hole for closing upper valve seat；Lower valve ball 9 then along hinder lower block 4 slowly by
Block downlink closes the inverse well-flushing valve of ground well head when lower valve ball 9 is not yet fallen back at baffle 7, makes to inject water through upper overcurrent
Hole 2 and lower flowing hole 8 are injected into top water filling layer position through water injection hole 10 by the ball seat hole on lower valve seat, and lower part fills the water layer
Position is by stopping water filling because starting pressure height.
When being filled the water again to lower part water filling layer position, closes the water injection valve of ground well head, opens the inverse well-flushing valve of ground well head,
The valve of ground well head is switched into anti-flushing well state, anti-flushing well 5 minutes or more, then after stopping anti-flushing well 5 minutes, opens ground
The water injection valve of face well head normally fills the water lower part water filling layer position.
The embodiment described above is only exemplary embodiments, but the present invention is not limited only to these embodiments, this field
Technical staff can make modification without departing from the spirit and inspiration of the present invention.There may be many for aspect disclosed herein
Change, combination and modification, and be within, therefore, protection scope is not limited only to explanation above.
Claims (12)
1. separate water injection well automatic reverse injection well downhole flow regulator, including top connection (1) and lower contact (11), characterized in that top connection (1) with
Outer tube (6) are connected between lower contact (11), inner tube (5) is connect, between inner tube (5) and outer tube (6) with the inner cavity of top connection (1)
Water filling ring cavity is formed, water injection hole (10) is radially arranged in water filling ring cavity；The tube wall of inner tube (5) be equipped with upper flowing hole (2) and
Upper valve and lower valve are housed in lower flowing hole (8), lumen, is equipped with and descends to the mortal world in the inner tube (5) between upper valve and lower valve
That slow closing device；Upper valve is fixed in the inner tube (5) below flowing hole (2), and lower valve is fixed on lower flowing hole (8) and note
In inner tube (5) between water hole (10), upper valve and lower valve are single stream valves, only allow water flow from upper valve and lower valve
Lower section flow through upwards；The water injection hole (10) is arranged in the water filling ring cavity below lower valve and water filling layer position and inner tube
(5) it is connected to.
2. separate water injection well automatic reverse injection well downhole flow regulator as described in claim 1, characterized in that the lower valve slow closing device packet
Resistance lower block (4) and baffle (7) are included, one end of baffle (7) is fixed on the tube wall above lower flowing hole (8), hinders lower block (4) interval
And it is fixed on the tube wall between baffle (7) and upper valve in opposite directions.
3. separate water injection well automatic reverse injection well downhole flow regulator as claimed in claim 2, characterized in that under the resistance block (4) be with it is interior
The semicircle blocks that pipe (5) cavity radius is consistent.
4. separate water injection well automatic reverse injection well downhole flow regulator as claimed in claim 2 or claim 3, characterized in that block (4) is vertical under the resistance
Section is the center line of bevel edge from inner tube (5) triangle oblique to tube wall.
5. separate water injection well automatic reverse injection well downhole flow regulator as claimed in claim 4, characterized in that the baffle (7) be both ends with
Strip metal plate that the tube wall of inner tube (5) is consistent, flexible.
6. separate water injection well automatic reverse injection well downhole flow regulator as claimed in claim 2, characterized in that the upper valve includes upper valve
Seat, upper valve ball (3) and ball cover, upper valve ball (3) and upper valve seat cooperate, and ball cover is equipped with liquid flow hole, is fixed on valve
In inner tube (5) above ball (3).
7. separate water injection well automatic reverse injection well downhole flow regulator as claimed in claim 6, characterized in that the lower valve is equipped with lower valve
Ball (9) and lower valve seat, lower valve ball (9) and lower valve seat cooperate.
8. being using the method for separate water injection well automatic reverse injection well downhole flow regulator described in claim 1:
A, automatic reverse injection well downhole flow regulator is corresponding with water filling layer position, be connected in water injection string；
B, first lower part water filling layer position is filled the water；
C, after the water injection pressure of lower part water filling layer position is higher than the starting pressure of automatic reverse injection well downhole flow regulator, again to top water filling layer position
Water filling.
9. using the method for separate water injection well automatic reverse injection well downhole flow regulator as claimed in claim 8, characterized in that match automatic reverse
Hydrophone is connected to above the packer in water injection string corresponding with top water filling layer position, corresponding with lower part water filling layer position
Only need to connect a conventional injection well downhole flow regulator below packer in water injection string.
10. using the method for separate water injection well automatic reverse injection well downhole flow regulator as claimed in claim 9, characterized in that filled the water to lower part
When the water filling of layer position, opens the water injection valve of ground well head, closes the inverse well-flushing valve of ground well head, injection water is through top connection (1) and upper
Flowing hole (2) enters in the conventional injection well downhole flow regulator below packer along water filling ring cavity downlink, from lower contact (11), is injected into lower part
In water filling layer position.
11. using the method for separate water injection well automatic reverse injection well downhole flow regulator as claimed in claim 9, characterized in that filled the water to top
When the water filling of layer position, the inverse well-flushing valve progress anti-flushing well closed the water injection valve of ground well head, open ground well head, injection water connects under
Head (11), which enters, inner tube (5) and to be opened lower valve ball (9), make lower valve ball (9) open baffle (7) along hinder lower block (4) by
The lower section of valve seat in block uplink, arrival, anti-flushing well water flow are flowed out from top connection (1)；After anti-flushing well, ground well head is closed
Inverse well-flushing valve, upper valve ball (3) falls the ball seat hole for closing upper valve seat；Lower valve ball (9) then along hinder lower block (4) slowly by
Block downlink makes to inject water through upper flowing hole (2) and lower flowing hole (8) when lower valve ball (9) is not yet fallen back at baffle (7)
It is injected into top water filling layer position through water injection hole (10) by the ball seat hole on lower valve seat, and lower part water filling layer position because of starting by pressing
Power is high and stops water filling.
12. using the method for separate water injection well automatic reverse injection well downhole flow regulator as claimed in claim 9, characterized in that again to lower part
When water filling layer position fills the water, closes the water injection valve of ground well head, opens the inverse well-flushing valve of ground well head, the valve of ground well head is fallen
It changes anti-flushing well state, anti-flushing well 5 minutes or more into, then after stopping anti-flushing well 5 minutes, opens the water injection valve of ground well head under
Portion's water filling layer position normally fills the water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610968450.9A CN106437645B (en) | 2016-10-28 | 2016-10-28 | Separate water injection well automatic reverse injection well downhole flow regulator and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610968450.9A CN106437645B (en) | 2016-10-28 | 2016-10-28 | Separate water injection well automatic reverse injection well downhole flow regulator and its application method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106437645A CN106437645A (en) | 2017-02-22 |
| CN106437645B true CN106437645B (en) | 2018-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610968450.9A Active CN106437645B (en) | 2016-10-28 | 2016-10-28 | Separate water injection well automatic reverse injection well downhole flow regulator and its application method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113693A (en) * | 2018-09-28 | 2019-01-01 | 中国石油化工股份有限公司 | Hydraulic control changes layer water filling device and changes layer water injection string and construction method |
| CN115075786B (en) * | 2021-03-11 | 2023-09-26 | 中国石油天然气股份有限公司 | High-temperature high-pressure water injection well segmented wheel injection tool, system and method |
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|---|---|---|---|---|
| FR2444873A1 (en) * | 1978-12-18 | 1980-07-18 | Freyssinet Int Stup | Ejectable clack device for tubes - has elastic ball which passes through seating by deformation under pressure allowing stepwise injection e.g. of concrete into ground |
| CN1538034A (en) * | 2003-10-23 | 2004-10-20 | 中国石化胜利油田有限公司采油工艺研 | Well washing method of hierarchical water injection well and its underwell tubular column |
| CN201202457Y (en) * | 2008-06-06 | 2009-03-04 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Double-tube water injecting system of water injection well |
| RU2395672C1 (en) * | 2009-06-09 | 2010-07-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Water oil well operation plant |
| CN203655586U (en) * | 2013-11-07 | 2014-06-18 | 中国石油化工股份有限公司 | Deep-pumping oil extracting rod pump |
| CN204738799U (en) * | 2015-06-18 | 2015-11-04 | 中国石油化工股份有限公司 | Double -barrelled water injection tubular column in pit |
| CN206158706U (en) * | 2016-10-28 | 2017-05-10 | 中国石油化工股份有限公司 | Seperated layer water injection well self -commutation water injection mandrel |
-
2016
- 2016-10-28 CN CN201610968450.9A patent/CN106437645B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2444873A1 (en) * | 1978-12-18 | 1980-07-18 | Freyssinet Int Stup | Ejectable clack device for tubes - has elastic ball which passes through seating by deformation under pressure allowing stepwise injection e.g. of concrete into ground |
| CN1538034A (en) * | 2003-10-23 | 2004-10-20 | 中国石化胜利油田有限公司采油工艺研 | Well washing method of hierarchical water injection well and its underwell tubular column |
| CN201202457Y (en) * | 2008-06-06 | 2009-03-04 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Double-tube water injecting system of water injection well |
| RU2395672C1 (en) * | 2009-06-09 | 2010-07-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Water oil well operation plant |
| CN203655586U (en) * | 2013-11-07 | 2014-06-18 | 中国石油化工股份有限公司 | Deep-pumping oil extracting rod pump |
| CN204738799U (en) * | 2015-06-18 | 2015-11-04 | 中国石油化工股份有限公司 | Double -barrelled water injection tubular column in pit |
| CN206158706U (en) * | 2016-10-28 | 2017-05-10 | 中国石油化工股份有限公司 | Seperated layer water injection well self -commutation water injection mandrel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106437645A (en) | 2017-02-22 |
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