CN107420061A - Underbalance pulse oscillator - Google Patents
Underbalance pulse oscillator Download PDFInfo
- Publication number
- CN107420061A CN107420061A CN201710912452.0A CN201710912452A CN107420061A CN 107420061 A CN107420061 A CN 107420061A CN 201710912452 A CN201710912452 A CN 201710912452A CN 107420061 A CN107420061 A CN 107420061A
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- Prior art keywords
- impeller
- valve core
- bearings
- core tube
- hole
- Prior art date
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- 238000005553 drilling Methods 0.000 claims abstract description 46
- 239000012530 fluid Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000010355 oscillation Effects 0.000 claims abstract 2
- 238000005245 sintering Methods 0.000 claims description 8
- 244000258271 Galium odoratum Species 0.000 claims description 7
- 235000008526 Galium odoratum Nutrition 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003756 stirring 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
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
-
- 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)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of oscillator that drilling fluid can be promoted to take rock in the fields such as oil drilling.Its technical scheme is：Top connection, impeller housing, bear box, nozzle housing and lower contact pass sequentially through threaded connection；Positioning is realized by flat key and locking cap between impeller and impeller mandrel；Impeller mandrel, water cap and valve core tube pass sequentially through threaded connection, and moment of torsion caused by drilling fluid impact impeller passes to valve core tube by impeller mandrel and water cap, drives its rotation.Nozzle housing is provided with radial direction through hole, and valve core tube realizes tube fluid and extraneous connection and disconnection, the pressure oscillation of fluid in tubing string realized by tubing string inside and outside differential pressure, so as to produce drillstring vibrations when rotating.The present invention can effectively reduce the frictional resistance of horizontal well, extended reach well lower drilling tool and the borehole wall, can improve Improving Mud Carrying Capacity, while drilling efficiency is improved, can avoid the down-hole accidents such as viscous card.
Description
Technical field
The invention belongs to a kind of Novel down-hole instrument of oil-gas drilling engineering field, particularly has and promotes chip removal work(
The novel hydropower oscillator of energy.
Background technology
In recent years, with the continuous development of China's industry, oil, the demand of natural gas and yield are also increasing.So
And in order to alleviate the shortage problem of China's oil resource, people start to enter to the severe field of the environmental conditions such as deep-well, ultradeep well
Row oil exploitation.The exploitation of new oil gas well makes drilling engineering face more complicated situation, to meet stepout well condition or new oil
Gas resource（Such as coal bed gas, shale gas, marine oil and gas）Needs, corresponding novel drilling method also continues to develop with instrument.
In these new drilling techniques evolutions, it is the weight for needing to solve to improve rate of penetration, reduce wall friction, increase well target footpath
Want underlying issue.In the method for solving these problems, the downhole tool mechanically to work realizes energy using drilling fluid
Conversion, certain expected vibration is produced, was quickly grown in recent years.Compared with other method, downhole tool has energy conversion effect
The characteristics of rate is high, good in economic efficiency, flexible and changeable, so as to obtain extensive concern and application.Related tool type includes spinning
The specific implementations such as drilling tool, hydraulic impacting device have valve plate, screw rod, turbine, centrifuge blade etc., these new methods and new tool
Occur that there is important application value to antifriction, speed-raising synergy.Existing hydroscillator can raise pump pressure, to mud
The service life of pump can adversely affect, and axial force caused by screw rod can strengthen dynamic friction between valve plate and quiet valve plate
Power, and then the abrasion of dynamic valve plate and quiet valve plate can be accelerated, this can greatly shorten the service life of hydroscillator.
Based on this, herein on existing Research foundation, a kind of new oscillator is proposed, realizes that energy turns using drilling fluid
Change, produce the complex vibration based on axial vibration, due to the design feature of itself, axial force caused by impeller is not passed through
Valve core tube passes to lower contact, the landwaste in drilling well liquid energy agitation bore hole annulus sprayed from bypass, to improve taking for drilling fluid
Rock ability.And airframe structure parameter and drilling parameter are combined, realize drilling process antifriction, increase drill bit available weight, carry
High rate of penetration and extension drill string enter the purpose of well location moves.
The content of the invention
It is an object of the invention to：To overcome existing level well, extended reach well to creep into, frictional resistance is big, and well head the pressure of the drill can not be effective
Pass to that the deficiency of drill bit, the large rock-carrying ability of drilling fluid be not high and existing axial vibration instrument using effect is undesirable asks
Topic, designs a kind of novel negative pressure pulse oscillator.
To achieve the above object, the technical solution adopted by the present invention is：Described underbalance pulse oscillator, by top connection,
Locking cap, adjust pad A, impeller, flat key, impeller mandrel, impeller housing, water cap, valve core tube, adjust pad B, upper TC bearings move
Circle, upper TC bearings moving-coil wear-resistant sleeve, type sealing ring, upper TC bearings Jing Quan, upper TC bearings it is quiet circle wear-resistant sleeve, woodruff key, string bearing,
Bear box, lower TC bearings moving-coil, lower TC bearings moving-coil wear-resistant sleeve, lower TC bearings it is quiet circle wear-resistant sleeve, nozzle housing, nozzle, under
Joint, plug composition, it is characterised in that top connection（1）, impeller housing（7）, bear box（18）, nozzle housing（22）Connect with
Head（24）Pass sequentially through threaded connection；Impeller（4）With impeller mandrel（6）Between pass through flat key（5）And locking cap（2）Connection, it is real
Existing impeller（4）Positioning；Locking cap（2）Pass through screw thread and impeller mandrel（6）Connection；Impeller mandrel（6）, water cap（8）And valve core tube
（9）Pass sequentially through threaded connection；Upper TC bearings moving-coil（11）Pass through screw thread and valve core tube（9）Connection；Upper TC bearings Jing Quan（14）
Pass through woodruff key（16）With bear box（18）Coordinate, realize that its is circumferentially positioned；String bearing（17）Positioned at upper TC bearings Jing Quan
（14）With nozzle housing（22）Between, and pass through bear box（18）With nozzle housing（22）Between screw thread coordinate realize string axle
Hold（17）Positioning；Lower TC bearing moving-coils（19）With valve core tube（9）Between using screw thread coordinate；Valve core tube（9）Lower end is provided with two
Individual spaced 180 ° of radial direction through hole, is corresponded to therewith, nozzle housing（22）Lower end is also provided with radial direction through hole, and through hole is built with spray
Mouth（23）And plug（25）, nozzle（23）And plug（25）Pass through screw thread and nozzle housing（22）Connection；Nozzle housing（22）On
End inner surface setting has the quiet circle wear-resistant sleeve of lower TC bearings（21）, and pass through sintering and nozzle housing（22）Connect together；Nozzle
Shell（22）The radial direction through hole of lower end is arranged in pairs, spaced 180 ° and in the same plane of each pair radial direction through hole.Nozzle
Shell（22）The through hole of lower end could be arranged to 1 pair, 2 pairs, 3 pairs or 4 pairs, in accompanying drawing by taking 2 pairs of through holes as an example, the quantity of through hole
Determined according to requirement of actual working condition；, then can be by which part nozzle when actual condition, which changes, needs to change vibration frequency
（23）Change plug into（25）, or by which part plug（25）Change nozzle into（23）, the nozzle of replacing（23）Or plug（25）
Must change in pairs.Valve core tube（9）In the radial direction through hole same plane of lower end, after instrument assembly is completed, valve core tube（9）
The radial direction through hole of lower end two and nozzle housing（22）The radial direction through hole of lower end is in same plane.
Compared with the prior art, its advantage is the present invention：(1) less standpipe pressure can is only needed to produce
Negative-going pulse；(2) conventional hydraulic oscillator can raise pump pressure, and underbalance pulse oscillator is provided with brand-new bypass, Ke Yi
Pump pressure is reduced while improving drilling speed, reduces the consumption to pump；（3）Underbalance pulse oscillator can provide the week of a frequency-adjustable
Phase property axial impact force；（4）The drilling fluid that underbalance pulse oscillator radially sprays has the ability that impact stirs to the borehole wall, helps
In landwaste in the migration of annular space, raising Improving Mud Carrying Capacity.
Brief description of the drawings
Fig. 1 is the structural representation of underbalance pulse oscillator of the present invention.
In figure：1- top connections, 2- locking caps, 3- adjust pads A, 4- impeller, 5- flat keys, 6- impellers mandrel, 7- impeller housings
The upper TC bearings moving-coil of body, 8- water caps, 9- valve core tubes, 10- adjust pads B, 11-, the upper TC bearings moving-coil wear-resistant sleeves of 12-, 13-O types
The upper TC bearings of upper TC bearings Jing Quan, the 15- of sealing ring, 14- it is quiet circle wear-resistant sleeve, 16- woodruff keies, 17- string bearing, 18- bear boxes,
The quiet circle wear-resistant sleeve of TC bearings, 22- nozzle housings, 23- sprays under TC bearing moving-coils wear-resistant sleeve, 21- under TC bearings moving-coil, 20- under 19-
Mouth, 24- lower contacts.
Fig. 2 is the structural representation of underbalance pulse oscillator operation state 2 of the present invention.
Fig. 3 is that the drilling fluid of underbalance pulse oscillator operation state 1 of the present invention flows schematic three dimensional views.
Fig. 4 is that the drilling fluid of underbalance pulse oscillator operation state 2 of the present invention flows schematic three dimensional views.
Fig. 5 is the schematic three dimensional views of impeller of the present invention and its connection member.
Fig. 6 is the sectional view in A-A faces in Fig. 1 of the present invention.
In figure：The upper TC bearings moving-coil of 9- valve core tubes, 11-, the upper TC bearings moving-coil wear-resistant sleeves of 12-, the upper TC bearings Jing Quan of 14-,
The quiet circle wear-resistant sleeve of the upper TC bearings of 15-, 16- woodruff keies, 18- bear boxes.
Fig. 7 is the sectional view in B-B faces in Fig. 1 of the present invention.
In figure：9- valve core tubes, 22- nozzle housings, 23- nozzles, 25- plugs.
Fig. 8 is the sectional view in C-C faces in Fig. 2 of the present invention.
In figure：9- valve core tubes, 22- nozzle housings, 23- nozzles, 25- plugs.
Fig. 9 is flat key type impeller schematic three dimensional views of the present invention.
Figure 10 is spline impeller schematic three dimensional views of the present invention.
Figure 11 is upper TC bearings moving-coil of the present invention and the schematic three dimensional views after upper TC bearings moving-coil wear-resistant sleeve sintering.
Figure 12 is upper TC bearings Jing Quan of the present invention and the schematic three dimensional views after the quiet circle wear-resistant sleeve sintering of upper TC bearings.
Figure 13 is underbalance pulse oscillator of the present invention and damper cooperation schematic diagram.
In figure：1301- dampers, 1302- underbalance pulse oscillators.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：With reference to the accompanying drawings shown in 1, the underbalance pulse oscillator is main
Will be by top connection, locking cap, adjust pad A, impeller, flat key, impeller mandrel, impeller housing, water cap, valve core tube, adjust pad
B, the quiet circle wear-resistant sleeve of upper TC bearings moving-coil, upper TC bearings moving-coil wear-resistant sleeve, type sealing ring, upper TC bearings Jing Quan, upper TC bearings, half
Round key, string bearing, bear box, lower TC bearings moving-coil, lower TC bearings moving-coil wear-resistant sleeve, the quiet circle wear-resistant sleeve of lower TC bearings, nozzle
Shell, nozzle, lower contact, plug composition, it is characterised in that top connection 1, impeller housing 7, bear box 18, the and of nozzle housing 22
Lower contact 24 passes sequentially through threaded connection；Connected between impeller 4 and impeller mandrel 6 by flat key 5 and locking cap 2, realize impeller 4
Positioning；Locking cap 2 is connected by screw thread with impeller mandrel 6；Impeller mandrel 6, water cap 8 and valve core tube 9 pass sequentially through threaded connection；
Upper TC bearings moving-coil 11 is connected by screw thread with valve core tube 9；The upper quiet circle 14 of TC bearings is matched somebody with somebody by woodruff key 16 and bear box 18
Close, realize that its is circumferentially positioned；String bearing 17 is located between the quiet circle 14 of upper TC bearings and nozzle housing 22, and passes through bear box 18
Screw thread between nozzle housing 22 coordinates the positioning for realizing string bearing 17；Used between lower TC bearings moving-coil 19 and valve core tube 9
Screw thread coordinates；The lower end of valve core tube 9 is provided with two spaced 180 ° of radial direction through hole, corresponds to therewith, the lower end of nozzle housing 22
Radial direction through hole is provided with, through hole is connected built with nozzle 23 and plug 25, nozzle 22 and plug 25 by screw thread with nozzle housing 22；
The upper end inner surface setting of nozzle housing 22 has the quiet circle wear-resistant sleeve 21 of lower TC bearings, and is connected to one with nozzle housing 22 by sintering
Rise；The radial direction through hole of the lower end of nozzle housing 22 is arranged in pairs, spaced 180 ° and in the same plane of each pair radial direction through hole.
The through hole of the lower end of nozzle housing 22 could be arranged to 1 pair, 2 pairs, 3 pairs or 4 pairs, in accompanying drawing by taking 2 pairs of through holes as an example, the number of through hole
Amount determines according to requirement of actual working condition；When actual condition, which changes, needs to change vibration frequency, then which part can be sprayed
Mouth 23 changes plug 25 into, or changes which part plug 25 into nozzle 23, and the nozzle 23 or plug 25 of replacing must be paired
Change.In the radial direction through hole same plane of the lower end of valve core tube 9, after instrument assembly is completed, valve core tube 9 lower end two radial direction is led to
The radial direction through hole in hole and the lower end of nozzle housing 22 is in same plane.
The basic functional principle of underbalance pulse oscillator is：Drilling fluid with pressure potential is input to by ground drilling pump
Down-hole string, after pressure drilling fluid is input to underbalance pulse oscillator, impeller 4 is impacted, impeller 5 rotates, by drilling fluid
A part of pressure potential changes into mechanical energy, and mechanical energy drives valve core tube 9 to do periodic rotational movements, and valve core tube 9 controls instrument
The connection and disconnection of internal drilling fluid and outside drilling fluid, due to the pressure differential of drilling fluid inside and outside instrument, rotated in valve core tube 9
During can make internal tool pressure produce cyclic fluctuation so that underbalance pulse oscillator produce a cycle vibration；
And the drilling fluid flowed out can also be used to clean the borehole wall, improve the large rock-carrying ability of drilling fluid.
In the course of work, underbalance pulse oscillator top connects shock absorber and is used cooperatively, and as shown in figure 13, is flowed out from damper
Drilling fluid directly from top connection 1 flow into underbalance pulse oscillator inside, the drilling fluid flowed through from top connection 1 directly impacts impeller
4, impeller 4 is produced rotary motion, and supervene certain axial force.As shown in figure 3, after drilling fluid impact impeller 4, enter
Annular space between impeller housing 7 and water cap 8, then flowed into by the radial hole of water cap 8 inside water cap 8, along instrument toward flowing down,
Into inside valve core tube 9；When the radial direction through hole of the lower end radial direction through hole of valve core tube 9 and nozzle housing 22 staggers, drilling fluid is direct
Lower contact 24 is flowed into from the inside of valve core tube 9, then is flowed out from lower contact 24, into bottomhole assembly；When the lower end of valve core tube 9 radial direction
When through hole connects with the radial direction through hole of nozzle housing 22, as shown in figure 4, a part of drilling fluid connects under being flowed into from the inside of valve core tube 9
First 24, then flowed out from lower contact 24, into bottomhole assembly, another part drilling fluid is then flowed through inside valve core tube 9, then from spray
It is ejected at mouth 23 outside oscillator, due to the pressure differential of drilling fluid inside and outside oscillator, can reduces the pressure inside oscillator；
Rotary motion caused by drilling fluid impact impeller 4 then passes to valve core tube 9 by impeller mandrel 6 and water cap 8, as shown in figure 5, making
Valve core tube 9 rotates, and the lower end radial direction through hole of valve core tube 9 is being connected with the radial direction through hole of nozzle housing 22 and is not being connected it
Between circulate so that drilling liquid pressure inside drill string produces a cycle fluctuation.Caused by drilling fluid impact impeller 4 downwards
Axial force by impeller mandrel 6, water cap 8, valve core tube 9, upper TC bearings moving-coil 11 and string bearing 17 pass to nozzle housing 22,
So that the lower end of valve core tube 9 is not subject to excessive axial force.
Claims (8)
1. underbalance pulse oscillator, by top connection, locking cap, adjust pad A, impeller, flat key, impeller mandrel, impeller housing, water
Cap, valve core tube, adjust pad B, upper TC bearings moving-coil, upper TC bearings moving-coil wear-resistant sleeve, type sealing ring, upper TC bearings Jing Quan, on
The quiet circle wear-resistant sleeve of TC bearings, woodruff key, string bearing, bear box, lower TC bearings moving-coil, lower TC bearings moving-coil wear-resistant sleeve, lower TC
The quiet circle wear-resistant sleeve of bearing, nozzle housing, nozzle, lower contact, plug composition, it is characterised in that top connection（1）, impeller housing（7）、
Bear box（18）, nozzle housing（22）And lower contact（24）Pass sequentially through threaded connection；Impeller（4）With impeller mandrel（6）It
Between pass through flat key（5）And locking cap（2）Connection, realizes impeller（4）Positioning；Locking cap（2）Pass through screw thread and impeller mandrel（6）Even
Connect；Impeller mandrel（6）, water cap（8）And valve core tube（9）Pass sequentially through threaded connection；Upper TC bearings moving-coil（11）By screw thread with
Valve core tube（9）Connection；Upper TC bearings Jing Quan（14）Pass through woodruff key（16）With bear box（18）Coordinate, realize that it is circumferentially fixed
Position；String bearing（17）Positioned at upper TC bearings Jing Quan（14）With nozzle housing（22）Between, and pass through bear box（18）With nozzle
Shell（22）Between screw thread coordinate realize string bearing（17）Positioning；Lower TC bearing moving-coils（19）With valve core tube（9）Between adopt
Coordinated with screw thread；Valve core tube（9）Lower end is provided with two spaced 180 ° of radial direction through hole, corresponds to therewith, nozzle housing（22）
Lower end is also provided with radial direction through hole, and through hole is built with nozzle（23）And plug（25）, nozzle（23）And plug（25）By screw thread with
Nozzle housing（22）Connection.
2. the connected mode of impeller according to claim 1 and impeller mandrel, it is characterised in that：Described impeller（4）With
Impeller mandrel（6）Connected mode include flat key connection, spline connection, semicircle key connection or radial direction lock-screw connection.
3. upper TC bearings moving-coil according to claim 1, upper TC bearings Jing Quan and lower TC bearing moving-coils, it is characterised in that：
Described upper TC bearings moving-coil wear-resistant sleeve（12）With upper TC bearings moving-coil（11）Connected together by sintering；Upper TC bearings Jing Quan
Wear-resistant sleeve（15）With upper TC bearings Jing Quan（14）Connected together by sintering；Lower TC bearings moving-coil wear-resistant sleeve（20）With lower TC axles
Hold moving-coil（19）Connected together by sintering.
4. nozzle housing according to claim 1, it is characterised in that：Described nozzle housing（22）Upper end inner surface setting
There is the quiet circle wear-resistant sleeve of lower TC bearings（21）, and pass through sintering and nozzle housing（22）Connect together；Nozzle housing（22）Lower end
Radial direction through hole be arranged in pairs, spaced 180 ° and in the same plane of each pair radial direction through hole.
5. the radial direction through hole of nozzle housing lower end according to claim 4, it is characterised in that：It is provided with described through hole
Screw thread, is used for and nozzle（23）Or plug（25）Coordinate；Nozzle housing（22）The radial direction through hole quantity of lower end include 1 pair, 2 pairs, 3
Pair or 4 pairs, in accompanying drawing by taking 2 pairs of through holes as an example, the quantity of through hole determines according to requirement of actual working condition；By taking 4 pairs of through holes as an example,
, then can be by which part nozzle when actual condition, which changes, needs to change vibration frequency（23）Change plug into（25）, or will
Which part plug（25）Change nozzle into（23）, the nozzle of replacing（23）Or plug（25）Must change in pairs.
6. valve core tube according to claim 1, it is characterised in that：The valve core tube（9）The radial direction through hole of lower end is same
In plane, after instrument assembly is completed, valve core tube（9）The radial direction through hole of lower end two and nozzle housing（22）The radial direction of lower end is led to
Hole is in same plane.
7. underbalance pulse oscillator according to claim 1, it is characterised in that：Work as valve core tube（9）The radial direction through hole of lower end
With nozzle（23）During connection, part drilling fluid is from valve core tube（9）Inside flows to tool exterior, tubing string inside drilling fluid pressure drop
It is low；Work as valve core tube（9）During in closure state, valve core tube（9）Internal drilling fluid disconnects with tool exterior drilling fluid, while tubing string
Internal drilling liquid pressure is begun to ramp up；So it is concatenated to form drilling fluid pressure oscillation inside tubing string.
8. underbalance pulse oscillator according to claim 1, it is characterised in that：Described valve core tube（9）Lower surface is with
Joint（24）Keep certain gap.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710912452.0A CN107420061A (en) | 2017-09-29 | 2017-09-29 | Underbalance pulse oscillator |
| PCT/CN2017/107549 WO2019061617A1 (en) | 2017-09-29 | 2017-10-24 | Negative pressure pulse oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710912452.0A CN107420061A (en) | 2017-09-29 | 2017-09-29 | Underbalance pulse oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107420061A true CN107420061A (en) | 2017-12-01 |
Family
ID=60436130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710912452.0A Pending CN107420061A (en) | 2017-09-29 | 2017-09-29 | Underbalance pulse oscillator |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107420061A (en) |
| WO (1) | WO2019061617A1 (en) |
Cited By (10)
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| CN108678659A (en) * | 2018-05-11 | 2018-10-19 | 西南石油大学 | A kind of underground drop is rubbed low frequency impact drilling tool |
| CN108798520A (en) * | 2018-05-29 | 2018-11-13 | 西南石油大学 | A kind of underground drop, which is rubbed, subtracts the shimmy drilling tool of torsion |
| CN109441356A (en) * | 2019-01-08 | 2019-03-08 | 西南石油大学 | Hydroscillator based on cam and impeller |
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| CN109611028A (en) * | 2019-01-08 | 2019-04-12 | 西南石油大学 | Hydroscillator based on roller and impeller |
| CN109707313A (en) * | 2019-01-08 | 2019-05-03 | 西南石油大学 | Vane type multiple-pulse hydroscillator |
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| CN109441356B (en) * | 2019-01-08 | 2020-08-28 | 西南石油大学 | Hydraulic oscillator based on cam and impeller |
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| CN113958280A (en) * | 2021-10-28 | 2022-01-21 | 西南石油大学 | Horizontal well rotation type detritus fishing tool with replaceable spray nozzle |
| CN115217418A (en) * | 2022-07-26 | 2022-10-21 | 西南石油大学 | Full-dimensional friction-reducing and resistance-reducing oscillator |
| CN115217418B (en) * | 2022-07-26 | 2023-12-08 | 西南石油大学 | Full-dimensional antifriction and resistance-reducing oscillator |
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Application publication date: 20171201 |