CN107366528B - A kind of water injection well downhole oscillation allocation process tubing string and method - Google Patents
A kind of water injection well downhole oscillation allocation process tubing string and method Download PDFInfo
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- CN107366528B CN107366528B CN201610322869.7A CN201610322869A CN107366528B CN 107366528 B CN107366528 B CN 107366528B CN 201610322869 A CN201610322869 A CN 201610322869A CN 107366528 B CN107366528 B CN 107366528B
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- oscillation
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- well downhole
- spring
- tubing string
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- 238000002347 injection Methods 0.000 title claims abstract description 56
- 239000007924 injection Substances 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 230000010355 oscillation Effects 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 35
- 210000002445 nipple Anatomy 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 21
- 239000012530 fluid Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003190 augmentative effect Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 22
- 239000010410 layer Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- LVYZJEPLMYTTGH-UHFFFAOYSA-H dialuminum chloride pentahydroxide dihydrate Chemical compound [Cl-].[Al+3].[OH-].[OH-].[Al+3].[OH-].[OH-].[OH-].O.O LVYZJEPLMYTTGH-UHFFFAOYSA-H 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000009827 uniform distribution Methods 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of water injection well downhole oscillation allocation process tubing string and methods, wherein tubing string includes oscillating buffer, oscillation generation injection well downhole flow regulator, the oscillating buffer upper end is connect with upper tubing round thread, lower end is then connect with variable buckle joint screw thread, and it is fixed with locking nail, the oscillation occurs injection well downhole flow regulator upper end and connects variable buckle connector by pipe nipple, and lower end is then even stringed by box cupling.The present invention will fill the water and block releasing technique unification, utilize injection water energy amount, injection well downhole flow regulator is occurred by oscillation in underground, form hydraulic oscillation pulse, it can effectively release and prevent the borehole wall nearby stratum and farther formation blockage, while can realize the purpose for surveying tune, augmented injection, and saved individual well cost, the activity duration is effectively reduced, well validity period is extended.
Description
Technical field
The present invention relates to oilfield exploitation process pipe string, specifically a kind of water injection well downhole oscillation allocation process tubing string and
Method.
Background technique
Country conventional waterflooding well is all the near wellbore zone frequent occurrence with long-term injecting water under hydrostatic pressure water flooding regime at present
Layer blocking and contamination phenomenon make the reduction of stratum water absorbing capacity.For renwing stratum water injection rate, the method that high pressure water injection need to be taken,
Such as the de-plugging process measure such as pressure break, acidification, it causes oil reservoir to injure, increases crude oil cost, or the method using vibration: having
Vibratory drilling method is had children outside the state plan in underground, and down-hole mechanical vibratory drilling method and underground shock wave method etc. achieve certain effect, still, adopt at present
Method for oscillating has shortcoming, and Chinese patent CN 91207925.8 provides a kind of energy storage type hydraulic pulse water ingection device,
The injector is underground vibrating generating device, though injection water can be made directly to evoke vibration on the stratum, but its structure is complex, installation
Difficulty, device is under pressure in underground, temperature etc. influences, and reliability is low and the service life is short.
Summary of the invention
The purpose of the present invention is to provide a kind of water injection well downhole oscillation allocation process tubing string and method, underground structure are simple
Reliably, field conduct method is easy, effectively improves injection rate.Water filling is unified with block releasing technique, using injection water energy amount, in well
It is lower that injection well downhole flow regulator is occurred by oscillation, hydraulic oscillation pulse is formed, can effectively release and prevent borehole wall stratum and farther nearby
Formation blockage, while can realize the purpose for surveying tune, augmented injection, and saved individual well cost, the activity duration is effectively reduced, is extended
Well validity period.
In order to achieve the above objectives, present invention employs following technical solution, a kind of water injection well downhole oscillation allocation process
Injection well downhole flow regulator occurs for tubing string, including oscillating buffer, oscillation, and the oscillating buffer upper end is connect with upper tubing round thread, and lower end is then
It connecting with variable buckle joint screw thread, and is fixed with locking nail, the oscillation occurs injection well downhole flow regulator upper end and connects variable buckle connector by pipe nipple,
Then even stringed by box cupling lower end.
The oscillating buffer includes outer cylinder, internal frame pipe, upper spring, lower spring, the outer sleeve on the outside of internal frame pipe simultaneously
And annular space is formed between the two, it is equipped with spring in the middle part of the internal frame pipe outer wall and separates step, above-mentioned annular space is divided into two up and down
Chamber places upper spring and lower spring respectively.
Internal frame pipe lower part is also cased with end top cover, and end top cover upper end is threadedly coupled with outer cylinder, and solid with locking nail
Fixed, the upper spring upper end is withstood on the inner shoulder table that outer tube inner wall opens up, and the lower lower spring end is withstood in the top cover of end.
The internal frame pipe outer wall is additionally provided with upper and lower positioning step, is respectively cooperating with outer cylinder and end top cover carries out axially position.
The oscillation occur injection well downhole flow regulator include from top to bottom sequentially connected orientation spool, top connection, spin-ended set, under connect
Head, and its oscillating tube inside top connection is set and the rotation fuse that is arranged in inside spin-ended set, the rotation fuse with stop
Annular space is formed between rotation set, installation spring and adjusting ring, spring upper end spring base are connect with oscillating tube lower thread in annular space,
Lower spring end, which is withstood on, to be adjusted on ring, and the rotation fuse outer wall opens up protrusion land, which opens up arc groove and pass through
Pattern rolling ball rotation is arranged in lower contact upper surface.
The orientation spool is threadedly coupled with top connection, and is fastened with the anti-turn screw for being equipped with sealing ring.
Step is set in the top connection, is cooperated with the raised step of oscillation pipe outer wall setting, top connection lower part is equipped with edge
The fluid hole of circumference uniform distribution, the oscillating tube top are equipped with the liquid-entering hole being uniformly distributed along the circumference, and the rotation fuse lower end is set
There is adjustment hole, and the rotary core sub-portion for opening up adjustment hole is inserted into inside lower contact.
The spin-ended set upper side upper surface is equipped with U-type groove and top connection lower end cooperates, and spin-ended set inner cavity middle and lower part is along circle
It is symmetrically arranged with two keyways week, the adjusting ring is externally provided with circumferentially symmetrical rectangular preiection, and the adjusting ring is placed in only
In the keyway of rotation set, adjusts and pass through trapezoidal thread clearance fit with rotation fuse on the inside of ring.
In order to reach above-mentioned another object, present invention employs following technical solution, a kind of water injection well downhole oscillation injection allocation
Method, first by silk plug, set slips, lower packet, oscillating buffer, lower oil pipe, box cupling, oscillation occur injection well downhole flow regulator, pipe nipple,
Variable buckle connector, oscillating buffer, upper oil pipe, upper packer and centralizer are sequentially connected with and in tripping in water filling casings, make to vibrate
Injection well downhole flow regulator occurs and reaches water filling interval；
Secondly, injecting low pressure liquid in oil pipe, makes to set slips and lower packet is set；
Then, oil pipe hydraulic pressure is discharged, tubing string is transferred, oil pipe injection is slightly higher hydraulic, sets upper packer；
Finally, water of the injection with pressure in oil pipe, injection well downhole flow regulator, which occurs, for oscillation makes to inject one section of one section of ground of water into water filling
Layer generates waterpower pulse.
Compared to the prior art, the invention has the following advantages:
Injection well downhole flow regulator is occurred using oscillation, injection water is turned into pulsed power stream from the circulation of continuous hydrostatic, effectively inhibits oil
In pipe and the generation of injection well downhole flow regulator peripheral stratum fouling occurs for oscillation, and plays the role of de-plugging to water filling layer to a certain extent.
The tubing string vibration environment that process pipe string is generated by water filling is effectively improved using oscillating buffer, protects packer
The stability of working condition makes extending in the well service life for water injection string.
Tool construction on integrated artistic tubing string is simple and reliable, and site construction technology is simple.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of water injection well downhole oscillation allocation process tubing string of the invention；
Fig. 2 is the structural schematic diagram of oscillating buffer；
Fig. 3 and Fig. 4 is the structural schematic diagram that injection well downhole flow regulator occurs for oscillation；
Fig. 5 is to adjust ring structure schematic diagram；
Fig. 6 is one of embodiment of water injection well downhole oscillation allocation process tubing string at the scene.
In figure: injection well downhole flow regulator 6, box cupling occur for upper oil pipe 1, oscillating buffer 2, variable buckle connector 3, locking nail 4, pipe nipple 5, oscillation
7, lower oil pipe 8, casing 9；
Centralizer 101, water filling layer 103, lower packet 104, sets slips 105, silk plug 106 at upper packer 102；
Outer cylinder 201, internal frame pipe 202, sealing ring 203, upper spring 204, upper positioning step 205, lower positioning step 208, bullet
Spring separates step 206, lower spring 207, locking nail 209, end top cover 210, sealing ring 211；
Orientation spool 601, top connection 603, anti-turn screw 604, sealing ring 605, oscillating tube 606, sealing ring 608, protrusion
Step 609, fluid hole 610, it is locking nail 611, sealing ring 622, spin-ended set 613, sealing ring 614, spring 615, spring base 616,
Sealing ring 617, trapezoidal thread 619, keyway 620, adjusts ring 621, ball 622, sealing ring 623, sealing ring at rotation fuse 618
624,625, lower contact 626 of locking nail.
Specific embodiment
Detailed description for the present invention and technology contents, cooperation Detailed description of the invention it is as follows, however attached drawing only provides reference with
Purposes of discussion is not intended to limit the present invention.
According to Fig. 1, a kind of water injection well downhole oscillation allocation process tubing string, including upper oil pipe 1, oscillating buffer 2, variable buckle are connect
First 3, injection well downhole flow regulator 6, box cupling 7 and lower oil pipe 8 occur for locking nail 4, pipe nipple 5, oscillation, on the oscillating buffer 2 with upper 1 spiral shell of oil pipe
Line connection, lower end are threadedly coupled with variable buckle connector 3, and fixed with locking nail 4, and 3 lower end of variable buckle connector sequence is threadedly coupled pipe nipple
5, injection well downhole flow regulator 6, box cupling 7 and lower oil pipe 8 occur for oscillation.
According to fig. 2, the oscillating buffer 2 includes outer cylinder 201, internal frame pipe 202, upper spring 204, lower spring 207 and end
Top cover 210 is equipped with spring in the middle part of the internal frame pipe 202 and separates step 206, by the upper spring 204 being mounted in outer cylinder and lower bullet
Spring 207 separates, and about 202 two sides of internal frame pipe are additionally provided with positioning step 205,208 up and down, and 202 top of internal frame pipe and outer cylinder 201 are logical
The sealing of sealing ring 203 is crossed, lower part is sealed with end top cover 210 by sealing ring 211, and described 210 sets of end top cover in internal frame pipe 202
Lower part is withstood lower spring 207, is threadedly coupled with outer cylinder 201, and fixed with locking nail 209.
According to Fig. 3, Fig. 4, Fig. 5, it includes orientation spool 601, top connection 603, oscillating tube that injection well downhole flow regulator, which occurs, for the oscillation
606, spin-ended set 613, spring 615, spring base 616, rotation fuse 618, adjusting ring 621, ball 622 and lower contact 626, it is described
Orientation spool 601 be threadedly coupled with top connection 603, and be equipped with sealing ring 605 anti-turn screw 604 fasten, it is described
Oscillating tube 606 is mounted in top connection 603, is sealed with top connection 603 and spin-ended set 613 by sealing ring 608,612, middle part
Raised step 609 is located in top connection 603 between step and spin-ended set 613,613 top of spin-ended set and top connection 603
It is threadedly coupled, and is fastened with locking nail 611, lower part is threadedly coupled with lower contact 626, by locking 625 fastening of nail, utilizes sealing
623 sealing of circle, the spring base 616 are placed in spin-ended set 613, are sealed with sealing ring 614, upper end and 606 screw thread of oscillating tube
Connection, lower end inside are sealed with rotation fuse 618 by sealing ring 617, and lower end outside entangles spring 615, the adjusting ring
621 are placed in the keyway 620 of spin-ended set 613, and spring 615 is withstood in upper surface, and inside and rotation fuse 618 pass through trapezoidal thread
619 clearance fits, the rotation fuse 618 are mounted in lower contact 626 by ball 622, are sealed with sealing ring 624.
601 top of orientation spool is equipped with location hole 602.
Step is set in the top connection 603, is cooperated with the raised step 609 of oscillating tube 606, lower part is equipped with circumferentially
The fluid hole 610 of cloth.
606 top of oscillating tube is equipped with the liquid-entering hole 607 being uniformly distributed along the circumference, and sets raised step 609 on the outside of middle part.
The 613 upper end upper surface of spin-ended set is equipped with U-type groove and internal screw thread, cooperates with 603 lower end of top connection, in inner cavity
Lower part is circumferentially symmetrically arranged with two keyways 620.
The adjusting ring 621 is externally provided with circumferentially symmetrical rectangular preiection 6211, inside and sets trapezoidal thread 6212.
It is processed as trapezoidal thread 619 on the outside of the rotation fuse 618, outside lower end sets raised step, under raised step
End face is equipped with arc groove, and lower end is equipped with adjustment hole 627.
The wherein exemplary embodiments of field conduct of the present invention are as follows, and a bite low-permeability oil deposit single layer vibrates water injection technology construction
Operation: as shown in Figure 6.
First by silk plug 106, set slips 105, lower packet 104, oscillating buffer 2, lower oil pipe 8, box cupling 7, oscillation
Injection well downhole flow regulator 6, pipe nipple 5, variable buckle connector 3, oscillating buffer 2, upper oil pipe 1, upper packer 102 and centralizer 101 occurs sequentially to connect
It connects and tripping in fills the water in casing 9, make oscillation that injection well downhole flow regulator 6 occur and reach 103 sections of layer of water filling；
Secondly, injecting low pressure liquid in oil pipe 1, makes to set slips 105 and lower packet 104 is set；
Then, release oil pipe 1 is hydraulic, and decentralization tubing string certain distance (works according to 2 inner spring 204,207 of oscillating buffer
Distance setting), oil pipe 1 injects slightly higher hydraulic, sets upper packer 102；
Finally, injecting the water of certain pressure in oil pipe 1, injection well downhole flow regulator 6, which occurs, for oscillation makes to inject one section of one section of ground of water into note
Water layer 103, and generate waterpower pulse and wash away oil reservoir.
When needing to carry out water injection rate allotment, can tripping in patent 200910018261.5 describe integrated measurement and adjustment instrument carry out
Flow rate test adjusts ring position by rotation fuse adjustment, so that initial tension of spring is changed, change injection pressure difference, thus
The vibration frequency of oscillating tube is adjusted, realizes injection flow allocating.
The foregoing is merely presently preferred embodiments of the present invention, non-to limit the scope of the patents of the invention, other are with this
The equivalence changes of the patent spirit of invention should all belong to the scope of the patents of the invention.
Claims (7)
1. a kind of water injection well downhole oscillation allocation process tubing string, which is characterized in that water distribution occurs including oscillating buffer, oscillation
Device, the oscillating buffer upper end are connect with upper tubing round thread, and lower end is then connect with variable buckle joint screw thread, and solid with locking nail
Fixed, the oscillation occurs injection well downhole flow regulator upper end and connects variable buckle connector by pipe nipple, and lower end is then even stringed by box cupling；
The oscillation occurs injection well downhole flow regulator and includes sequentially connected orientation spool, top connection, spin-ended set, lower contact from top to bottom, and
The oscillating tube inside top connection is arranged in and the rotation fuse that is arranged in inside spin-ended set in it, the rotation fuse and spin-ended set it
Between form annular space, installation spring and adjust ring in annular space, spring upper end spring base is connect with oscillating tube lower thread, under spring
End, which is withstood on, to be adjusted on ring, and the rotation fuse outer wall opens up protrusion land, which opens up arc groove and revolved by ball
It is rotatable to be arranged in lower contact upper surface.
2. a kind of water injection well downhole oscillation allocation process tubing string according to claim 1, which is characterized in that the oscillation is slow
Rushing device includes outer cylinder, internal frame pipe, upper spring, lower spring, and the outer sleeve forms annular space on the outside of internal frame pipe and between the two,
It is equipped with spring in the middle part of the internal frame pipe outer wall and separates step, above-mentioned annular space is divided into two chambers up and down and places upper spring respectively under
Spring.
3. a kind of water injection well downhole oscillation allocation process tubing string according to claim 2, which is characterized in that the internal frame pipe
Lower part is also cased with end top cover, and end top cover upper end is threadedly coupled with outer cylinder, and is fixed with locking nail, the upper spring upper end top
On the inner shoulder table that outer tube inner wall opens up, the lower lower spring end is withstood in the top cover of end.
4. a kind of water injection well downhole oscillation allocation process tubing string according to claim 3, which is characterized in that the internal frame pipe
Outer wall is additionally provided with upper and lower positioning step, is respectively cooperating with outer cylinder and end top cover carries out axially position.
5. a kind of water injection well downhole oscillation allocation process tubing string according to claim 1, which is characterized in that the positioning
Pipe nipple is threadedly coupled with top connection, and is fastened with the anti-turn screw for being equipped with sealing ring.
6. a kind of water injection well downhole oscillation allocation process tubing string according to claim 1, which is characterized in that connect on described
Step is set in head, is cooperated with the raised step of oscillation pipe outer wall setting, top connection lower part is equipped with the fluid hole being uniformly distributed along the circumference, institute
The oscillating tube top stated is equipped with the liquid-entering hole being uniformly distributed along the circumference, and the rotation fuse lower end is equipped with adjustment hole, and opens up tune
Inside the rotary core sub-portion insertion lower contact of knothole.
7. a kind of water injection well downhole oscillation allocation process tubing string according to claim 1, which is characterized in that described is spin-ended
It puts on end face to cooperate equipped with U-type groove and top connection lower end, spin-ended set inner cavity middle and lower part is circumferentially symmetrically arranged with two keyways, described
It adjusts ring and is externally provided with circumferentially symmetrical rectangular preiection, the adjusting ring is placed in the keyway of spin-ended set, is adjusted on the inside of ring
Pass through trapezoidal thread clearance fit with rotation fuse.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322869.7A CN107366528B (en) | 2016-05-13 | 2016-05-13 | A kind of water injection well downhole oscillation allocation process tubing string and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322869.7A CN107366528B (en) | 2016-05-13 | 2016-05-13 | A kind of water injection well downhole oscillation allocation process tubing string and method |
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| CN107366528B true CN107366528B (en) | 2019-07-02 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458150A (en) * | 2018-11-16 | 2019-03-12 | 中国海洋石油集团有限公司 | A kind of downhole ultrasonic oscillation release device and method |
| CN113250658B (en) * | 2021-06-01 | 2022-11-04 | 哈尔滨艾拓普科技有限公司 | Intelligent oil well production allocator |
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|---|---|---|---|---|
| CN2083628U (en) * | 1991-03-27 | 1991-08-28 | 玉门石油管理局石油沟油矿 | Energy-storage hydraulic pulse vibrator |
| CN2450377Y (en) * | 2000-10-09 | 2001-09-26 | 中国石油天然气股份有限公司 | Slide valve type hydraulic vibrator for oil well |
| CN2890322Y (en) * | 2006-03-10 | 2007-04-18 | 张琳 | Downhole low-frequency vibration generator |
| CN201090199Y (en) * | 2007-06-20 | 2008-07-23 | 中国石油天然气股份有限公司 | Two-level three-segment injection-divided tubular pile capable of preventing water injection segment from inverse-spraying and channelling |
| CN202090834U (en) * | 2011-06-22 | 2011-12-28 | 周福刚 | Hydrodynamic vibrator |
| CN204060541U (en) * | 2014-08-14 | 2014-12-31 | 伊伟 | The anti-tripping fastening devices of hydraulic sucker rod |
| CN205036361U (en) * | 2015-09-07 | 2016-02-17 | 中国石油化工股份有限公司 | Perforation seperated layer water injection integration tubular column |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8863835B2 (en) * | 2011-08-23 | 2014-10-21 | Halliburton Energy Services, Inc. | Variable frequency fluid oscillators for use with a subterranean well |
-
2016
- 2016-05-13 CN CN201610322869.7A patent/CN107366528B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2083628U (en) * | 1991-03-27 | 1991-08-28 | 玉门石油管理局石油沟油矿 | Energy-storage hydraulic pulse vibrator |
| CN2450377Y (en) * | 2000-10-09 | 2001-09-26 | 中国石油天然气股份有限公司 | Slide valve type hydraulic vibrator for oil well |
| CN2890322Y (en) * | 2006-03-10 | 2007-04-18 | 张琳 | Downhole low-frequency vibration generator |
| CN201090199Y (en) * | 2007-06-20 | 2008-07-23 | 中国石油天然气股份有限公司 | Two-level three-segment injection-divided tubular pile capable of preventing water injection segment from inverse-spraying and channelling |
| CN202090834U (en) * | 2011-06-22 | 2011-12-28 | 周福刚 | Hydrodynamic vibrator |
| CN204060541U (en) * | 2014-08-14 | 2014-12-31 | 伊伟 | The anti-tripping fastening devices of hydraulic sucker rod |
| CN205036361U (en) * | 2015-09-07 | 2016-02-17 | 中国石油化工股份有限公司 | Perforation seperated layer water injection integration tubular column |
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| CN107366528A (en) | 2017-11-21 |
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