CN106089025A - A kind of low pressure consumption underground vibrating speed-raising instrument - Google Patents
A kind of low pressure consumption underground vibrating speed-raising instrument Download PDFInfo
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- CN106089025A CN106089025A CN201610550616.5A CN201610550616A CN106089025A CN 106089025 A CN106089025 A CN 106089025A CN 201610550616 A CN201610550616 A CN 201610550616A CN 106089025 A CN106089025 A CN 106089025A
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- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 238000005553 drilling Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 8
- 230000000737 periodic effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 7
- 230000010355 oscillation Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 210000003462 vein Anatomy 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
-
- 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
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (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)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of low pressure consumption underground vibrating speed-raising instrument.Technical scheme is: this low pressure consumption underground vibrating speed-raising instrument is made up of pressure pulse generating tool and Amplitude amplification instrument；The moving valve plate rotated by turbine drive it is provided with in pressure pulse generating tool, and regulate moving valve plate rotating speed by deceleration turbine, dynamic determine valve group bottom and be provided with into U-shaped vortex vibration device, runner is constantly switched by moving valve plate, the fluid in circular vortex cavity is made to switch between turbulent state and non-vortex state, when whirlpool cavity fluid is in turbulent state, upper tool part is in high pressure conditions, when whirlpool cavity fluid is in non-vortex state, upper tool part pressure is in low-pressure state, therefore produces periodic pressure pulse in instrument；Pressure pulse generating tool top or bottom connect Amplitude amplification instrument, make BHA produce periodic axial vibration, are effectively improved the frictional resistance of drill string and the borehole wall, improve bit speed.
Description
Technical field
The present invention relates to oil, natural gas extraction, drilling tool field, especially a kind of low pressure consumption underground vibrating speed-raising work
Tool.
Background technology
Along with high angle hole, the extensive application of horizontal well, in drilling process, due to drilling tool Gravitative Loads, drilling tool is boring
When entering with borehole wall frictional resistance greatly, cause drilling tool backing pressure, have a strong impact on horizontal well drilling efficiency, therefore reduce frictional resistance, increase dynamic the pressure of the drill,
Improving drilling efficiency is problem in the urgent need to address in current drilling engineering.It has been investigated that, drill string is applied the suitable cycle
Property axial vibration, make the static friction between drill string and the borehole wall become dynamic friction, the frictional resistance of drilling process can be greatly reduced, make effectively
The pressure of the drill increases, thus reaches to improve the purpose of rate of penetration.
Existing vibration antifriction resistance instrument such as Chinese patent literature CN103696693A drilling water forced oscillation device, CN
Described by 102704842A drilling water forced oscillation device, its structure all uses single-head screw motor to drive dynamic valve port at one
Move reciprocatingly in plane, by dynamic valve port and the flow-passing surface product moment of determine valve formation, produce periodic pressure oscillation, above-mentioned adopt
By the structure of screw drive, because of the restriction in screw rod life-span, generally under water-base mud environment, service life is about 150 hours,
Under oil-base mud environment, service life is about 80 hours, and its rubber element constrains the service life of this structure and makes recruitment
Condition etc.；Also there are Chinese patent literature such as CN 104895517A a turbine drive bivalve hydroscillator, CN105089501A mono-
Described by kind of hydroscillator, its structure all uses turbine drive to move valve port and rotates, by rotation process with determine valve and formed
Stream interface product moment, produces periodic pressure oscillation, the turbo-driven hydroscillator of above-mentioned employing, because using turbine structure,
There is the biggest change on life-span, but the rotating speed of turbine is 800-2000 rev/min, compare the rotating speed of screw rod 140-360 rev/min, turbine
About vibration tool frequency of vibration is screw-rod structure 5.5 times driven, too high frequency of vibration can weaken the vibration effect of instrument
Really, and impact damaging on downhole instruments such as MWD；Simultaneously because above patent all uses flow-passing surface product moment to be that instrument produces
Raw periodic pressure change, thus results in instrument self pressure and consumes (about 4.5-8MPa) bigger than normal, to the requirement of drilling pump relatively
Height, and easily there is down-hole fault in long-term under high pressure operation, causes any property loss and casualties.
Summary of the invention
The technical problem to be solved is to provide a kind of low pressure consumption underground vibrating speed-raising instrument, it is ensured that underground vibrating
While effect, reduce instrument pressure consumption, in preferred scheme, it is possible to realize frequency of vibration adjustable, solve turbine in prior art
Drive and make the too high problem of frequency of vibration and short problem tool life.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: a kind of low pressure consumption underground vibrating speed-raising work
Tool, including pressure pulse generating tool and Amplitude amplification instrument, is characterized in that:
Pressure pulse generating tool is provided with driving turbine drive moving valve plate and rotates, and is provided with the dynamic valve of deceleration turbine regulation in instrument simultaneously
The rotating speed of sheet, moving valve plate bottom is provided with fixed valve plate, and fixed valve plate bottom is provided with into U-shaped vortex vibration device；
Amplitude amplification instrument is by overcoat is logical and mandrel forms, and overcoat is logical by splined sleeve, spring spool, piston sleeve and lower contact
Sleeve is connected in sequence, and mandrel is formed by connecting by spline mandrel, transition mandrel, piston mandrel and bottom piston, at disc spring shell
Being provided with disc spring group between body and spline mandrel, disc spring group bottom is provided with piston sleeve and the driving piston set of piston mandrel composition,
Driving piston set to be harmonious series connection, its driving piston set quantity can be 1 or more than 1.
It is characterized in that: vortex vibration device uses axially the structure cutd open, and is inside provided with conglobate vortex cavity, two lead channel
Tangentially connected with vortex cavity；The center of vortex cavity is provided with vortex cavity outlet, and vortex cavity outlet connects with liquid outlet.
It is characterized in that: moving valve plate is provided with dynamic valve inlet opening, dynamic valve inlet opening two inlet openings with fixed valve plate alternately connect
Logical, two inlet openings of fixed valve plate connect with vortex cavity two lead channel.
It is characterized in that: be provided with central shaft in pressure pulse generating tool, central shaft is rotatably supported in housing, housing
It is provided with driving turbine with central shaft, drives turbine bottom to be provided with deceleration turbine, drive the quantity class of turbine and deceleration turbine for appointing
Meaning number, can combination in any, make central shaft rotating speed adjustable, central shaft lower end and moving valve plate are fixed and are connected.
It is characterized in that: piston sleeve is provided with the low pressure pod apertures connected with drilling well annular space, piston mandrel is provided with middle
The high pressure pod apertures of flow passage.
A kind of low pressure consumption underground vibrating speed-raising instrument that the present invention provides, by using above structure, has following
Beneficial effect:
1, using runner dynamic, that fixed valve plate assembly changes entrance vortex cavity, instrument does not has the change of area of passage, by vortex cavity
The eddy current produced, produces periodic pressure pulse in upper tool part, for comparing the pressure reduction that area of passage change causes, and instrument
Pressure consumption is lower.
2, Amplitude amplification instrument uses the structure of multi-level piston group series connection, can compare more existing in the case of low pressure consumes
For having instrument, contrary increase tool vibration effect.
3, in preferred scheme, use the turbine assembly of scalable progression to replace screw rod as power drive, be avoided that
Use shorter problem the life tools caused because of rubber components in spiro driving device, simultaneously turbine assembly compare screw rod and
Speech, the pressure consumption of instrument is less, adapts to any mud system, without temperature limiting.
4, use deceleration turbine and use with driving worm-gear combination, played the effect of deceleration by deceleration turbine, by coupling
Driving turbine and deceleration turbine, the rotating speed with control centre's axle is adjustable, thus realizes shaking of low pressure consumption underground vibrating speed-raising instrument
Dynamic frequency is adjustable, is avoided that and individually uses turbine drive to cause asking of the too high downhole instrument damage caused of tool vibration frequency
Topic.
5, present configuration is simple, length is short, uses all-metal construction, the advantage with length in service life.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is the one main TV structure cross-sectional schematic of the present invention.
Fig. 2 is another main TV structure cross-sectional schematic of the present invention.
Fig. 3 is the pressure pulse generating tool structure cross-sectional schematic of the present invention.
Fig. 4 is the vortex vibration apparatus structure cross-sectional schematic of the present invention.
Fig. 5 is the Amplitude amplification instrument two-stage piston cascaded structure cross-sectional schematic of the present invention.
Fig. 6 is three grades of piston cascaded structure cross-sectional schematic of Amplitude amplification instrument of the present invention.
In figure: top connection 1, water conservancy diversion end cap 2, central shaft 3, alignment bearing 4, driving turbine 5, deceleration turbine 6, feed liquor ring 7,
Guide ring 8, thrust bearing 9, adjustment ring 10, moving valve plate 11, dynamic valve inlet 1101, fixed valve plate 12, determine valve inlet 1201, whirlpool
Stream vibrating device 13, vortex cavity lead channel 1301, vortex cavity 1302, vortex cavity outlet 1303, liquid outlet 1304, shell body 14, pressure arteries and veins
Rush generating tool 15, Amplitude amplification instrument 16, spline mandrel 17, splined sleeve 18, spring spool 19, disc spring group 20, transition core
Axle 21, piston sleeve 22, low pressure pod apertures 23, piston mandrel 24, end piston 25, lower contact sleeve 26, high pressure pod apertures 27.
Detailed description of the invention
In Fig. 1-2, a kind of low pressure consumption underground vibrating speed-raising instrument, pressure pulse generating tool 15 and Amplitude amplification instrument
16, pressure pulse generating tool 15 can be connected to the top of Amplitude amplification instrument 16, it is also possible to is connected to Amplitude amplification instrument
The bottom of 16, sees Fig. 1, in 2.
In Fig. 3-4, in the shell body 14 of pressure pulse generating tool 15, it is provided with central shaft 3, rotatable of central shaft 3
In load-carrying covering body 14, shell body 14 and central shaft 3 are provided with driving turbine 5, drive turbine 5 bottom to be provided with deceleration turbine 6, and the phase drives
The quantity of dynamic turbine 5 and deceleration turbine 6 can be any number, can combination in any, make central shaft 3 rotating speed adjustable, central shaft 3 lower end
Fixing with moving valve plate 11 and be connected, moving valve plate 11 bottom is provided with fixed valve plate 12, moving valve plate 11 and fixed valve plate 12 composition and moves, determines valve group,
Moving valve plate 11 is provided with dynamic valve inlet opening 1101, and dynamic valve inlet opening 1,101 two inlet openings 1201 with fixed valve plate 12 alternately connect
Logical, two inlet openings 1201 of fixed valve plate 12 connect with two lead channel 1301 of vortex vibration device 13, and the bottom of fixed valve plate 12 sets
There is into U-shaped vortex vibration device 13, see Fig. 3.
Vortex vibration device 13 uses axially the structure cutd open, and is inside provided with conglobate vortex cavity 1302, two feed liquors
Groove 1301 is tangentially connected with vortex cavity 1302；The center of vortex cavity 1302 is provided with vortex cavity outlet 1303, vortex cavity outlet 1303 and liquid outlet
1304 connections, when high speed liquid stream is entered by lead channel 1301, form eddy current in vortex cavity 1302, see Fig. 4.
When fluid is inside top connection 1 entering tool, through tapered water conservancy diversion end cap 2, guide fluid flow into central shaft 3 with
In gap between shell body 14, flow through driving turbine 5 and deceleration turbine 6, drive turbine 5 to drive central shaft 3 to rotate, deceleration nothing
Chatting 3 decelerating effects of 6 pairs of central shafts, fluid flows into central shaft 3 inside through guide ring 7 afterwards, through moving valve plate pod apertures 1101 He
Fixed valve plate pod apertures 1201 enters vortex vibration device 13, it is assumed that fluid is introduced into the left lead channel of vortex vibration device 13
1301, fluid forms eddy current counterclockwise in vortex cavity 1302, and moving valve plate 11 upper pressure increases, and is in the high pressure of pressure pulse
District, along with the rotation of moving valve plate 11, liquid stream is switched to right lead channel 1301, and the counterclockwise vortex flow in vortex cavity 1302 starts to disappear,
Moving valve plate upper pressure reduces, and is in the low-pressure area of pressure pulse, As time goes on, in vortex cavity 1302 eddy current clockwise by
Gradually being formed, moving valve plate 11 upper pressure increases again, is in pressure pulse higher-pressure region, the most repeatedly, along with turning of moving valve plate 11
Dynamic, in instrument, form periodic pressure oscillation.
In Fig. 5-6, Amplitude amplification instrument 16 is by overcoat is logical and mandrel forms, and overcoat is logical by splined sleeve 18, spring housing
Cylinder 19, piston sleeve 22 and lower contact sleeve 26 are connected in sequence, and mandrel is by spline mandrel 17, transition mandrel 21, piston core
Axle 24 and bottom piston 25 are formed by connecting, and are provided with disc spring group 20, disc spring group 20 times between disc spring housing 19 and spline mandrel 17
Portion is provided with piston sleeve 22 and the driving piston set of piston mandrel 24 composition, drives piston set to be harmonious series connection, and it drives piston set
Quantity can be 1 or more than 1；Piston sleeve 22 is provided with the low pressure pod apertures 23 connected with drilling well annular space, piston core
Axle 24 is provided with the high pressure pod apertures 27 connected with intermediate flow channel, and piston cavity of resorption is by high pressure pod apertures 27 and mandrel inner high voltage liquid stream
Connection, piston upper chamber is connected with low pressure annular space, due to the effect of pressure pulse generating tool, in mandrel by low pressure pod apertures 23
Portion produces a periodic pressure oscillation, and when in mandrel, liquid is high pressure, the pressure acting on piston both sides promotes mandrel
Stretch out, compress disc spring group 20；When in mandrel, liquid is low pressure, under the elastic force effect of disc spring group 20, disc spring group is recovered, mandrel
Retract.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as the restriction for the present invention, this Shen
Embodiment in please and the feature in embodiment, can mutual combination in any in the case of not conflicting.The protection model of the present invention
Enclose the technical scheme should recorded with claim, including the equivalent side of technical characteristic in the technical scheme that claim is recorded
Case is protection domain.Equivalent the most in this range is improved, also within protection scope of the present invention.
Claims (5)
1. a low pressure consumption underground vibrating speed-raising instrument, including pressure pulse generating tool (15) and Amplitude amplification instrument (16),
It is characterized in that:
Pressure pulse generating tool (15) is provided with driving turbine (5) and drives moving valve plate (11) to rotate, and is provided with deceleration in instrument simultaneously
The rotating speed of turbine (6) regulation moving valve plate (11), moving valve plate (11) bottom is provided with fixed valve plate (12), and fixed valve plate (12) bottom is provided with into
U-shaped vortex vibration device (13)；
Amplitude amplification instrument (16) is by overcoat is logical and mandrel forms, and overcoat is logical by splined sleeve (18), spring spool (19), piston
Sleeve (22) and lower contact sleeve (26) are connected in sequence, and mandrel is by spline mandrel (17), transition mandrel (21), piston mandrel
(24) it is formed by connecting with bottom piston (25), between disc spring housing (19) and spline mandrel (17), is provided with disc spring group (20), dish
The driving piston set that spring group (20) bottom is provided with piston sleeve (22) and piston mandrel (24) forms, drives piston set to be harmonious string
Connection, it drives piston set quantity can be 1 or more than 1.
A kind of low pressure consumption underground vibrating speed-raising instrument the most according to claim 1, is characterized in that: described vortex vibration dress
Put (13) to use axially the structure cutd open, be inside provided with conglobate vortex cavity (1302), two lead channel (1301) and vortex cavity
(1302) tangentially connected；The center of vortex cavity (1302) is provided with vortex cavity outlet (1303), vortex cavity outlet (1303) and liquid outlet
(1304) connection.
A kind of low pressure consumption underground vibrating speed-raising instrument the most according to claim 1, is characterized in that: moving valve plate (11) is provided with
Dynamic valve inlet opening (1101), dynamic valve inlet opening (1101) two inlet openings (1201) with fixed valve plate (12) alternately connect, and determine valve
Two inlet openings (1201) of sheet (12) connect with vortex cavity (13) two lead channel (1301).
A kind of low pressure consumption underground vibrating speed-raising instrument the most according to claim 1, is characterized in that: pressure pulse generating tool
Inside being provided with central shaft (3), central shaft (3) is rotatably supported in housing (14), and housing (14) and central shaft (3) are provided with driving
Turbine (5), drives turbine (5) bottom to be provided with deceleration turbine (6), and the quantity class driving turbine (5) and deceleration turbine (6) is any
Number, can combination in any, make central shaft (3) rotating speed adjustable, central shaft (3) lower end and moving valve plate (11) are fixing to be connected.
A kind of low pressure consumption underground vibrating speed-raising instrument the most according to claim 1, is characterized in that: piston sleeve sets on (22)
Having the low pressure pod apertures (23) connected with drilling well annular space, piston mandrel (24) is provided with the high pressure pod apertures connected with intermediate flow channel
(27).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810395762.4A CN108643822A (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
| CN201810393611.5A CN108643821A (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
| CN201610550616.5A CN106089025B (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550616.5A CN106089025B (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810395762.4A Division CN108643822A (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
| CN201810393611.5A Division CN108643821A (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106089025A true CN106089025A (en) | 2016-11-09 |
| CN106089025B CN106089025B (en) | 2018-11-13 |
Family
ID=57220051
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810395762.4A Withdrawn CN108643822A (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
| CN201810393611.5A Withdrawn CN108643821A (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
| CN201610550616.5A Active CN106089025B (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810395762.4A Withdrawn CN108643822A (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
| CN201810393611.5A Withdrawn CN108643821A (en) | 2016-07-14 | 2016-07-14 | A kind of low pressure consumption underground vibrating speed-raising tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN108643822A (en) |
Cited By (10)
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| CN109577887A (en) * | 2019-01-28 | 2019-04-05 | 长江大学 | A kind of oscillatory type horizontal well flushing tool |
| CN109763781A (en) * | 2018-12-28 | 2019-05-17 | 西南石油大学 | A kind of high-efficient pressurizing speed-raising well system for complicated bad ground |
| CN110593752A (en) * | 2019-10-22 | 2019-12-20 | 中国地质大学（北京） | All-metal downhole power drilling tool based on multi-stage double-plunger-eccentric gear mechanism |
| CN111197463A (en) * | 2018-11-19 | 2020-05-26 | 中国石油化工股份有限公司 | Oscillator |
| CN111270995A (en) * | 2020-03-09 | 2020-06-12 | 弗润联科(北京)石油科技有限公司 | Torsional low-pressure-consumption pressure-relief while-drilling tool and working method thereof |
| CN112065267A (en) * | 2020-08-21 | 2020-12-11 | 中国地质科学院勘探技术研究所 | All-metal large-torque non-circular gear downhole power drilling tool |
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| CN113006680A (en) * | 2021-03-19 | 2021-06-22 | 成都欧维恩博石油科技有限公司 | Low-pressure-loss torsion impact drilling tool and rock breaking method |
| CN113153154A (en) * | 2021-01-13 | 2021-07-23 | 西南石油大学 | Turbine type combined friction reducing tool capable of changing flowing state of drilling fluid |
| CN115898277A (en) * | 2022-10-11 | 2023-04-04 | 中国石油天然气股份有限公司 | Vibration drag reduction tool |
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| CN110017102A (en) * | 2019-05-24 | 2019-07-16 | 杰瑞能源服务有限公司 | A kind of fluid power pulsative oscillation tool |
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| CN114370226B (en) * | 2021-12-15 | 2024-03-22 | 西南石油大学 | Hydraulic variable-stage small-pressure-drop strong-impact oscillating tool based on radio frequency identification |
| CN115628025B (en) * | 2022-12-21 | 2023-08-18 | 中国石油集团川庆钻探工程有限公司 | Downhole tractor and coiled tubing tool |
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| CN106089025B (en) | 2018-11-13 |
| CN108643821A (en) | 2018-10-12 |
| CN108643822A (en) | 2018-10-12 |
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