CN106522843A - Drilling hydraulic driving oscillator and using method - Google Patents
Drilling hydraulic driving oscillator and using method Download PDFInfo
- Publication number
- CN106522843A CN106522843A CN201611016171.9A CN201611016171A CN106522843A CN 106522843 A CN106522843 A CN 106522843A CN 201611016171 A CN201611016171 A CN 201611016171A CN 106522843 A CN106522843 A CN 106522843A
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- main shaft
- impeller
- rotor
- housing
- month
- Prior art date
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- 238000005553 drilling Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 13
- 210000000078 claw Anatomy 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 210000002445 nipple Anatomy 0.000 claims description 27
- 238000011144 upstream manufacturing Methods 0.000 claims description 14
- 230000010355 oscillation Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract 2
- 230000003068 static effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses
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)
- Earth Drilling (AREA)
Abstract
The invention relates to a drilling hydraulic driving oscillator and a using method. The technical solution is that the drilling hydraulic driving oscillator comprises a shaking short section and a housing. The housing is internally provided with a power mechanism. A diverter of the power mechanism is provided with a main shaft chamber, and the outer side of the diverter is fixed to the inner wall of the housing by a support claw, and the main shaft chamber is communicated to a main shaft. The main shaft and the connection part of the lower part of the main shaft chamber and the main shaft are provided with combined sealing rings for preventing slurry from entering the main shaft chamber, so the work of a needle bearing is smooth. The middle part and the lower part of the main shaft are respectively provided with an impeller stop pin and a rotor stop pin. The impeller stop pin is matched and connected with an impeller, and the rotor stop in is matched and connected with a rotor. The bottom of the main shaft is installed at the center of a stator. The provided pure mechanical structure has long service life, the size of tools is shortened because the original screw rod motor is replaced by the impeller structure, and the impeller is driven to be rotated by the circulation of the slurry, so the cost is saved.
Description
Technical field
The present invention relates to a kind of oil/gas drilling instrument and method, more particularly to a kind of drilling well waterpower driving oscillator and make
Use method.
Background technology
With the development of petroleum industry, current oil drilling is gradually developed to horizontal well from original directional well, and
During horizontal well drilling, due to drilling tool self gravitation effect, cause drilling tool excessive with borehole wall frictional resistance in drilling, have a strong impact on
Drilling speed, or even cause drilling tool backing pressure be pressurized to drill bit.Therefore reduce frictional resistance, reduce lock of tool drilling, increase dynamic the pressure of the drill, improve
Drilling efficiency is problem in the urgent need to address in current drilling engineering.Research finds that mud passes through to cause mud pressure during drilling tool
Power size cyclically-varying, so that drilling tool bears periodic axial impact force, causes the drilling tool to produce in drilling process
Vibration, therefore the friction of drilling tool and the borehole wall can be reduced, improve the effect of load transfer, improve the control to tool-face, Jin Erda
To the purpose for improving drilling speed, saving drilling cost.
A kind of drilling water forced oscillation device of existing hydroscillator such as patent ZN102704842A, CN103696693A drilling wells
With hydroscillator, its structure is similar to, and is all made up of percussion mechanism and power assembly, and its power assembly is mainly by single head horse
Up to composition, mandrel is driven to rotate when fluid flows through power section, so that moving valve plate is in one plane moved back and forth, due to
The mutually stranding or coincidence of moving valve plate and quiet valve block causes upstream pressure generation pressure drop periodically to act on spring pipe nipple, so as to
Make the vibrations of instrument integral cycle.
There is elastomer stator so as to limit its service life, according to onsite application as instrument has inside the characteristic of screw rod
Situation is fed back its service life in cement mortar and, at 150 hours or so, is endured to the fullest extent due to its short life use cost height and denounced.
The content of the invention
The purpose of the present invention is aiming at the drawbacks described above of prior art presence, there is provided a kind of drilling well waterpower driving oscillator
And using method.
Its technical scheme is to include shaking pipe nipple（1）And housing（2）, described vibrations pipe nipple（1）Lower end be provided with anticreep
Buckle（4）, the fastener（4）And housing（2）Between be provided with spring（3）, described housing（2）With vibrations pipe nipple（1）It
Between be provided with combination sealing arrangement（23）Vibrations pipe nipple is entered for blocking mud in pit shaft（1）；
The housing（2）Actuating unit is provided with inside, the actuating unit includes diverter（5）, needle bearing（6）, support claw
（7）, combined seal ring（8）, main shaft（9）, impeller（13）, impeller backing pin（14）, rotor（18）, rotor backing pin（19）, stator
（22）, the diverter（5）It is provided with main shaft room, and diverter（5）Outside pass through support claw（7）It is fixed on housing（2）Inwall,
And main shaft room and main shaft（9）It is connected, the main shaft（9）With main shaft room bottom and main shaft（9）Connected component is provided with combination sealing
Circle（8）Stop that mud can not enter main shaft room, make needle bearing（6）Work is smooth；
The main shaft（9）Middle part and bottom be respectively arranged with impeller backing pin（14）With rotor backing pin（19）, described impeller gear
Pin card（14）With impeller（13）It is connected, described rotor backing pin（19）With rotor（18）It is connected, main shaft（9）Bottom
Installed in stator（22）Center, flow to drive impeller by mud（13）Rotate, impeller（13）Rotate and then make main shaft（9）
Rotate and rotor driven（18）Rotate.
Preferably, above-mentioned impeller（13）Top is provided with first half of the month baffle ring（12）, the first half of the month baffle ring（12）By upper gear
Circle（11）It is fixed on main shaft（9）Groove in, the first half of the month baffle ring（12）Outside is provided with first half of the month snap ring helmet（10）, it is described
First half of the month snap ring helmet（10）It is threadedly attached in main shaft（9）On；The impeller（13）Bottom pass through impeller backing pin（14）
Coordinate.
Preferably, above-mentioned rotor（18）Top be provided with the second half of the month baffle ring（17）, the second half of the month baffle ring（17）By under
Back-up ring（16）It is fixed on main shaft（9）Groove in, the second half of the month baffle ring（17）Outside have the second half of the month ring helmet（15）, it is described
The second half of the month ring helmet（15）It is threadedly attached in main shaft（9）On；The rotor（18）Bottom and rotor backing pin（19）Coordinate.
Preferably, said stator（22）It is welded on housing（2）Inner chamber in, the stator（22）In be provided with multiple earial drainages
Hole.
Preferably, spring（3）It is made up of 55crsiA materials.
Preferably, above-mentioned support claw（7）It is threadedly attached in diverter（5）On, and the support claw（7）It is vertical two-by-two
It is fixed on housing（2）Inwall.
Preferably, above-mentioned rotor（18）On have multiple discharge orifices.
Preferably, above-mentioned impeller（13）Blade is provided with, the blade is divided into 1/ according to the ratio difference for accounting for impeller height
2nd, 2/3,1/3 or 3/4 4 kind of model, it is divided into 30 °, 45 ° or 60 ° three kinds according to the angle difference of blade.
A kind of using method of drilling well waterpower driving oscillator that the present invention is mentioned, comprises the following steps：
Mud in housing drives impeller（13）, impeller（13）Drive is fixed on main shaft（9）On rotor（18）, by rotor
（18）And stator（22）Staggeredly overlap and produce pressure oscillation, work as rotor（18）And stator（22）Housing upstream pressure liter during coincidence
Height, the rising of upstream pressure cause spring（3）Compression；Work as rotor（18）And stator（22）The upstream pressure of housing when staggeredly overlapping
Release, the release of upstream pressure make spring（3）Release, produces and periodically changes, as mud pressure periodically change makes
Spring in vibrations pipe nipple（3）Constantly compression release, so that vibrations pipe nipple（1）Periodic vibration, shakes pipe nipple（1）Periodically
Shake promotes the motion of whole drill string, forms vibration.
The invention has the beneficial effects as follows：The long service life of the pure mechanic structure that the present invention is mentioned, due to being tied using impeller
Structure instead of original screw motor makes tool sizes shorten, and is rotated by the circulation impeller of mud, turning by impeller
Dynamic drive is all the rotor on main shaft, and rotor is overlapped with the mutually stranding of stator, causes upstream mud pressure to produce and periodically changes,
As mud pressure periodically change makes the spring in vibrations pipe nipple constantly compress release, so that vibrations pipe nipple periodically shakes
It is dynamic；The periodically shake of vibrations pipe nipple promotes the motion of whole drill string, as the motion of drill string makes drilling tool static friction be converted into dynamic friction
So as to reduce the friction of drilling tool and the borehole wall, improve the transmission effect of the pressure of the drill, and then reach raising drilling speed, cost-effective mesh
's.
Description of the drawings
Accompanying drawing 1 is the structural representation of the present invention；
Accompanying drawing 2 is the top view of impeller；
Accompanying drawing 3 is the side structure schematic diagram of impeller；
Accompanying drawing 4 is the structural representation of rotor；
In figure：Vibrations pipe nipple 1, housing 2, spring 3, fastener 4, diverter 5, needle bearing 6, support claw 7, combined seal ring
8th, main shaft 9, first half of the month snap ring helmet 10, upper back-up ring 11, first half of the month baffle ring 12, impeller 13, impeller backing pin 14, the second half of the month ring helmet
15th, lower back-up ring 16, the second half of the month baffle ring 17, rotor 18, rotor backing pin 19, bearing 20, bearing helmet 21, stator 22, combination sealing
Circle 23, discharge orifice 24；Blade 13.1.
Specific embodiment
With reference to accompanying drawing 1-4, the invention will be further described：
A kind of drilling well waterpower driving oscillator that the present invention is mentioned, including vibrations pipe nipple 1 and housing 2, described vibrations pipe nipple 1
Lower end is provided with fastener 4, is provided with spring 3 between the fastener 4 and housing 2, described housing 2 and vibrations pipe nipple 1 it
Between be provided with combination sealing arrangement 23 and enter vibrations pipe nipple 1 for blocking in pit shaft mud；
Actuating unit is provided with the housing 2, the actuating unit includes that diverter 5, needle bearing 6, support claw 7, combination are close
Seal 8, main shaft 9, impeller 13, impeller backing pin 14, rotor 18, rotor backing pin 19, stator 22, the diverter 5 are provided with main shaft room,
And the outside of diverter 5 is fixed on 2 inwall of housing by support claw 7, and main shaft room is connected with main shaft 9, the main shaft 9 with it is main
Axle room bottom is provided with combined seal ring 8 with 9 connected component of main shaft and stops that mud can not enter main shaft room, makes needle bearing 6 work
It is smooth；
The middle part and bottom of the main shaft 9 is respectively arranged with impeller backing pin 14 and rotor backing pin 19, described impeller backing pin card 14
It is connected with impeller 13, described rotor backing pin 19 is connected with rotor 18, the bottom of main shaft 9 is arranged in stator 22
The heart, flows to drive impeller 13 to rotate by mud, and impeller 13 is rotated and then makes that main shaft 9 is rotated and rotor driven 18 is rotated.
Wherein, 13 top of above-mentioned impeller is provided with first half of the month baffle ring 12, and the first half of the month baffle ring 12 is fixed by upper back-up ring 11
In the groove of main shaft 9, first half of the month snap ring helmet 10, the first half of the month snap ring helmet 10 outside the first half of the month baffle ring 12, are provided with
It is threadedly attached on main shaft 9；The bottom of the impeller 13 is coordinated by impeller backing pin 14.
Referring to the drawings 1, the top of above-mentioned rotor 18 is provided with the second half of the month baffle ring 17, and the second half of the month baffle ring 17 is by lower back-up ring
16 are fixed in the groove of main shaft 9, and there are the second half of the month ring helmet 15, the second half of the month ring helmet in the outside of the second half of the month baffle ring 17
15 are threadedly attached on main shaft 9；The bottom of the rotor 18 is coordinated with rotor backing pin 19.
Wherein, said stator 22 is welded in the inner chamber of housing 2, and four discharge orifices, spring 3 are provided with the stator 22
It is made up of 55crsiA materials.
Above-mentioned support claw 7 is threadedly attached on diverter 5, and the support claw 7 is vertically fixed in housing 2 two-by-two
Wall；There are four discharge orifices on rotor 18, above-mentioned impeller 13 is provided with blade, and the blade is different according to the ratio for accounting for impeller height
It is divided into 1/2,2/3,1/3 or 3/4 4 kind of model, is divided into 30 °, 45 ° or 60 ° three kinds according to the angle difference of blade, according to scene
Selecting the concrete model of impeller, design parameter configuration is as follows for the situation of mud displacement：
A kind of using method of drilling well waterpower driving oscillator that the present invention is mentioned, comprises the following steps：
Mud in housing drives impeller 13, and impeller 13 drives the rotor 18 being fixed on main shaft 9, by rotor 18 and stator 22
Staggeredly overlap and produce pressure oscillation, when rotor 18 and stator 22 overlap, housing upstream pressure is raised, the rising of upstream pressure
Spring 3 is caused to compress；The upstream pressure release of housing when rotor 18 and stator 22 staggeredly overlap, the release of upstream pressure make bullet
Spring 3 discharges, and produces and periodically changes, and the spring 3 in vibrations pipe nipple is constantly compressed due to mud pressure periodically change
Release, so that vibrations 1 periodic vibration of pipe nipple, shakes the motion that the periodically shake of pipe nipple 1 promotes whole drill string, form vibration.
In addition, it is necessary to explanation is：The present invention provides a kind of Purely mechanical, impeller is driven by mud, and impeller drives to be fixed
Rotor on main shaft, produces pressure oscillation by rotor and staggeredly overlapping for stator, and mud is produced and periodically changed, due to
Mud pressure periodically change vibrates vibrations pipe nipple.The present invention makes the static friction of original static drilling tool change into dynamic friction,
When static friction is converted into dynamic friction, friction factor reduces by 25% or so and solves the problems, such as that horizontal well drags pressure；Drilling tool is promoted to apply to drill bit
The impulsive force of high frequency increases the service life that drill bit broken rock energy extends drill bit；Long service life was at 1000 hours or so；Increase
The extension ability of horizontal well target area is added；Improve the control ability of tool-face in sliding process；Improve machinery in horizontal well target area
Drilling speed significantly improves loss of the pressure of the drill in drilling process（Reduce the frictional resistance between the borehole wall and tubing string）Drilling tool near can making
Combination produces axial vibration by a small margin, significantly improves the gravity of DHA（The pressure of the drill）Drill bit is delivered to, brill is made in addition
Tool combination is being changed into dynamic friction with the static friction on borehole wall longitudinal direction, significantly reduces Value of Friction Loss.So as to reduce various drilling processes
In, the loss of DHA the pressure of the drill particularly during the directional drilling using mud motor, reduce and bore
The stick slip vibration of post.Current more and more well tracks all compare bending, and this makes conventional mud motor combine big
The depth that can be reached in the drilling of displacement well is restricted, and by generation extensional vibration, this performance can make underground power drilling
Tool breaks through this restriction in the drilling of extended reach well, accomplishes that target spot is farther.
The above, is only the part preferred embodiment of the present invention, and any those of ordinary skill in the art may profit
The technical scheme being equal to is changed or is revised as with the technical scheme of above-mentioned elaboration.Therefore, according to the technology of the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (9)
1. a kind of drilling well waterpower driving oscillator, is characterized in that：Including vibrations pipe nipple（1）And housing（2）, described vibrations pipe nipple
（1）Lower end be provided with fastener（4）, the fastener（4）And housing（2）Between be provided with spring（3）, described housing
（2）With vibrations pipe nipple（1）Between be provided with combination sealing arrangement（23）Vibrations pipe nipple is entered for blocking mud in pit shaft（1）；
The housing（2）Actuating unit is provided with inside, the actuating unit includes diverter（5）, needle bearing（6）, support claw
（7）, combined seal ring（8）, main shaft（9）, impeller（13）, impeller backing pin（14）, rotor（18）, rotor backing pin（19）, stator
（22）, the diverter（5）It is provided with main shaft room, and diverter（5）Outside pass through support claw（7）It is fixed on housing（2）Inwall,
And main shaft room and main shaft（9）It is connected, the main shaft（9）With main shaft room bottom and main shaft（9）Connected component is provided with combination sealing
Circle（8）Stop that mud can not enter main shaft room, make needle bearing（6）Work is smooth；
The main shaft（9）Middle part and bottom be respectively arranged with impeller backing pin（14）With rotor backing pin（19）, described impeller gear
Pin card（14）With impeller（13）It is connected, described rotor backing pin（19）With rotor（18）It is connected, main shaft（9）Bottom
Installed in stator（22）Center, flow to drive impeller by mud（13）Rotate, impeller（13）Rotate and then make main shaft（9）
Rotate and rotor driven（18）Rotate.
2. drilling well waterpower driving oscillator according to claim 1, is characterized in that：The impeller（13）Top is provided with upper half
Month baffle ring（12）, the first half of the month baffle ring（12）By upper back-up ring（11）It is fixed on main shaft（9）Groove in, first half of the month gear
Ring（12）Outside is provided with first half of the month snap ring helmet（10）, the first half of the month snap ring helmet（10）It is threadedly attached in main shaft（9）
On；The impeller（13）Bottom pass through impeller backing pin（14）Coordinate.
3. drilling well waterpower driving oscillator according to claim 1, is characterized in that：The rotor（18）Top be provided with down
First quarter moon baffle ring（17）, the second half of the month baffle ring（17）By lower back-up ring（16）It is fixed on main shaft（9）Groove in, the second half of the month
Baffle ring（17）Outside have the second half of the month ring helmet（15）, the second half of the month ring helmet（15）It is threadedly attached in main shaft（9）On；
The rotor（18）Bottom and rotor backing pin（19）Coordinate.
4. drilling well waterpower driving oscillator according to claim 1, is characterized in that：The stator（22）It is welded on housing
（2）Inner chamber in, the stator（22）In be provided with multiple discharge orifices（24）.
5. drilling well waterpower driving oscillator according to claim 1, is characterized in that：Spring（3）For 55crsiA material systems
Into.
6. drilling well waterpower driving oscillator according to claim 1, is characterized in that：The support claw（7）Connected by screw thread
It is connected on diverter（5）On, and the support claw（7）Housing is vertically fixed on two-by-two（2）Inwall.
7. drilling well waterpower driving oscillator according to claim 1, is characterized in that：The rotor（18）On have multiple earial drainages
Hole（24）.
8. drilling well waterpower driving oscillator according to claim 1, is characterized in that：The impeller（13）It is provided with blade
（13.1）, the blade is divided into 1/2,2/3,1/3 or 3/4 4 kind of model according to the ratio difference for accounting for impeller height, according to blade
Angle difference be divided into 30 °, 45 ° or 60 ° three kinds.
9. a kind of using method of the drilling well waterpower driving oscillator as any one of claim 1-8, is characterized in that：Bag
Include following steps：
Mud in housing drives impeller（13）, impeller（13）Drive is fixed on main shaft（9）On rotor（18）, by rotor
（18）And stator（22）Staggeredly overlap and produce pressure oscillation, work as rotor（18）And stator（22）Housing upstream pressure liter during coincidence
Height, the rising of upstream pressure cause spring（3）Compression；Work as rotor（18）And stator（22）The upstream pressure of housing when staggeredly overlapping
Release, the release of upstream pressure make spring（3）Release, produces and periodically changes, as mud pressure periodically change makes
Spring in vibrations pipe nipple（3）Constantly compression release, so that vibrations pipe nipple（1）Periodic vibration, shakes pipe nipple（1）Periodically
Shake promotes the motion of whole drill string, forms vibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611016171.9A CN106522843B (en) | 2016-11-18 | 2016-11-18 | A kind of drilling well hydro powered oscillator and application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611016171.9A CN106522843B (en) | 2016-11-18 | 2016-11-18 | A kind of drilling well hydro powered oscillator and application method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106522843A true CN106522843A (en) | 2017-03-22 |
| CN106522843B CN106522843B (en) | 2019-02-19 |
Family
ID=58352490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611016171.9A Active CN106522843B (en) | 2016-11-18 | 2016-11-18 | A kind of drilling well hydro powered oscillator and application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106522843B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108846237A (en) * | 2018-06-30 | 2018-11-20 | 中国石油大学(华东) | A kind of stress and method of motion analysis of oscillator |
| WO2019061617A1 (en) * | 2017-09-29 | 2019-04-04 | 西南石油大学 | Negative pressure pulse oscillator |
| CN112127795A (en) * | 2020-10-13 | 2020-12-25 | 侯江伟 | Drive type hydraulic oscillator for well drilling |
| CN113027341A (en) * | 2021-04-12 | 2021-06-25 | 苗芷芃 | Adjustable screw anti-drag tool for coiled tubing drilling and adjusting method |
| CN114458229A (en) * | 2021-09-13 | 2022-05-10 | 中海油能源发展股份有限公司 | Vibration plugging tool for oil pipe of abandoned well shaft and plugging method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019061617A1 (en) * | 2017-09-29 | 2019-04-04 | 西南石油大学 | Negative pressure pulse oscillator |
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| CN108846237B (en) * | 2018-06-30 | 2022-06-28 | 中国石油大学(华东) | Stress and motion analysis method of oscillator |
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| CN114458229B (en) * | 2021-09-13 | 2024-05-14 | 中海油能源发展股份有限公司 | Vibration plugging tool for well shaft oil pipe of disposal well and plugging method thereof |
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