CN207660544U - Bottom pressure pulse friction reducer - Google Patents
Bottom pressure pulse friction reducer Download PDFInfo
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- CN207660544U CN207660544U CN201721785601.3U CN201721785601U CN207660544U CN 207660544 U CN207660544 U CN 207660544U CN 201721785601 U CN201721785601 U CN 201721785601U CN 207660544 U CN207660544 U CN 207660544U
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- vortex
- fluidic oscillator
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Abstract
Bottom pressure pulse friction reducer, outer tube between the utility model top connection and lower contact is followed successively by concave surface type fluidic oscillator from top to bottom, pedestal, vortex amplifier and bottom plate, concave surface type fluidic oscillator includes a fluidic oscillator entrance, two fluidic oscillator Efferent tubes, it engages in this profession and is connected respectively to high-drag channel and the low resistance flow channel of pedestal, it is respectively coupled to high-drag channel and the low resistance flow channel of vortex amplifier inner upper end again, vortex amplifier interior lower end is equipped with vortex cavity radial passage entrance, vortex cavity Tangential Channel entrance and vortex cavity, bottom plate is provided centrally with bottom plate axial passage, and it is connected to vortex cavity.The utility model is simple in structure, it can also be worked normally by changing concave surface type fluidic oscillator inlet nozzle width change system average pressure drop and frequency of oscillation, low-pressure, system pressure loss is small, vortex amplifier increases pressure pulse amplitude, reduces frequency of oscillation.
Description
Technical field
The utility model is related to a kind of drilling well oscillation friction reducer, especially it is used to reduce borehole wall frictional resistance, improves detritus
The down-hole pressure pulse friction reducer of efficiency.
Background technology
As Oil And Gas Exploration And Development degree is increasingly sharpened in global range, drilling technology is towards horizontal well, High angle
The directed drillings such as well, extended reach well field is developed.But directional well is different from straight well, and it is difficult to have more technologies in drilling process
Point, such as drag and torque is big, load transfer is difficult, drilling efficiency is low.For these stubborn problems, the drill assembly in wellbore
The method of middle addition pressure pulse vibratory tool can improve the friction condition between drilling tool and the borehole wall or sleeve, reach antifriction drop
The purpose turning round, extend wellbore, improving drilling speed.
A kind of drilling water forced oscillation devices of existing pressure pulse friction reducer such as patent CN102704842A,
CN103696693A drilling water forced oscillations device, a kind of hydroscillators of CN105089501A, a kind of turbines of CN106639944A
Described by formula downhole hydraulic oscillator, these friction reducers mainly use rotary valve pulse theory, by periodically changing valve
Flow section of making a slip of the tongue accumulates, and so that drilling fluid is generated pressure pulse, and then pulsed pressure wave is transferred to oscillating mechanism and generates axial vibration.But
Due to complicated, fragile part is more, and in underground, complex condition service life is limited.Patent CN103696686A jet streams
The pressure pulse drag reduction drilling tool proposed in formula explosive pressure pulse anti-drag drilling tool, simple in structure, movable member is few, but there are pressure drops
Greatly, the high problem of frequency of oscillation, and there is certain influence to measurement-while-drilling system.
Invention content
The purpose of this utility model is to provide a kind of bottom pressure pulse friction reducer.
The purpose of this utility model is achieved through the following technical solutions：
Bottom pressure pulse friction reducer is connect with outer tube by screw thread by top connection, and the outer tube other end passes through screw thread
It is connect with lower contact, outer tube is followed successively by concave surface type fluidic oscillator, vortex amplifier pedestal and bottom plate from top to bottom；Concave surface
Formula fluidic oscillator includes the fluidic oscillator entrance of a nozzle arrangements, is located at concave surface type fluidic oscillator center top, penetrates
It is set at left and right sides of stream oscillator entrance there are two fluidic oscillator control chamber, fluidic oscillator entrance lower section is set to shake there are two jet stream
Swing device Efferent tube；Vortex amplifier chassis interior upper end is equipped with pedestal high-drag channel and pedestal low resistance flow channel, and
It is connected to respectively with two fluidic oscillator Efferent tubes；Vortex amplifier high-drag is equipped in the middle part of the vortex amplifier chassis interior
Channel and vortex amplifier low resistance flow channel, and it is low with vortex amplifier pedestal upper end pedestal high-drag channel and pedestal respectively
Resistance channel is connected；The vortex amplifier interior lower end is equipped with vortex cavity radial passage entrance, vortex cavity Tangential Channel enters
Mouth and vortex cavity, wherein vortex cavity radial passage entrance are connected with vortex amplifier low resistance flow channel, vortex cavity Tangential Channel
Entrance is connected with vortex amplifier high-drag channel, and vortex cavity radial passage entrance and vortex cavity Tangential Channel entrance are and whirlpool
Flow chamber connection；The bottom plate is provided centrally with bottom plate axial passage, and is connected to vortex cavity；Concave surface type fluidic oscillator upper end with
It end in contact and is sealed with sealing ring under top connection, concave surface type fluidic oscillator lower end is used in combination with vortex amplifier pedestal upper-end contact
Sealing ring seals, and vortex amplifier pedestal lower end is connect with bottom plate by laser welding, under lower contact and vortex amplifier pedestal
End in contact simultaneously compresses.
The concave surface type fluidic oscillator integrally uses W-Co kind cemented carbide material to fabricate.
Operation principle：Drilling fluid enters fluidic oscillator entrance by top connection central passage, after being accelerated by nozzle with
Machine is amesiality and enters the fluidic oscillator Efferent tube of side, since the effect of fluidic oscillator control chamber internal control stream makes
Jet stream can not stablize attached wall and side and form jet stream self-oscillation, when drilling fluid is entered by the fluidic oscillator Efferent tube of side
To pedestal low resistance flow channel, and then vortex amplifier low resistance flow channel is entered, finally entered from vortex cavity radial passage entrance
To vortex cavity and when entering lower contact central passage by bottom plate axial passage, vortex cavity throttling action is smaller, fluid resistance
Relatively low, system pressure drop is relatively low, and when drilling fluid enters pedestal high-drag channel by the fluidic oscillator Efferent tube of side, into
And vortex amplifier high-drag channel is entered, finally from vortex cavity Tangential Channel entrance enter vortex cavity and by bottom plate axis
When entering lower contact central passage to channel, vortex cavity throttling action is larger, and fluid resistance is higher, and system pressure drop is higher,
Due to the self-oscillation characteristic of fluidic oscillator, the two Period Process is made to be alternately present, so as to cause periodic pressure wave
It is dynamic, form pressure pulse.
Advantageous effect：The utility model is simple in structure, compact, without motion parts, complex conditions adaptability are good；It can lead to
Change fluidic oscillator inlet nozzle width is crossed to change system average pressure drop and frequency of oscillation；Concave surface type fluidic oscillator
Critical operating Reynolds number it is relatively low, under the conditions of low pressure drop can steady operation, to system pressure drop require it is low；Vortex amplifier has
The characteristics of having and increase pressure pulse amplitude, reducing frequency of oscillation, drag-reduction effect is good and is influenced on measurement-while-drilling system smaller.
Description of the drawings
Attached drawing 1 is bottom pressure pulse friction reducer structure chart；
Attached drawing 2 is A-A sectional views in Fig. 1；
Attached drawing 3 is B-B sectional views in Fig. 1；
Attached drawing 4 is C-C sectional views in Fig. 1；
Attached drawing 5 is D-D sectional views in Fig. 1.
1 top connection, 2 outer tubes, 3 concave surface type fluidic oscillators, 4 vortex amplifier pedestals, 5 bottom plates, 6 lower contacts.
I-top connection central fluid channel；II-fluidic oscillator entrance；III-fluidic oscillator control chamber；IV-penetrates
Flow oscillator Efferent tube；V-pedestal low resistance flow channel；VI-pedestal high-drag channel；VII-vortex amplifier lower resistance is logical
Road；VIII-bottom plate axial passage；Ⅸ-lower contact central passage；Ⅹ-vortex amplifier high-drag channel；Ⅺ-vortex cavity diameter
To feeder connection；Ⅻ-vortex cavity Tangential Channel entrance；Ⅹ III-vortex cavities.
Specific implementation mode
This practicality is described in further detail with reference to the accompanying drawings and examples：
Structure explanation：Top connection 1 is connect by screw thread with outer tube 2, and 1 inside middle part of top connection is equipped with top connection central passage
Ⅰ；Outer tube 2 is connect by screw thread with lower contact 6, and lower contact 6 is internally provided with lower contact central passage Ⅸ；Inside outer tube 2 from upper and
Under be followed successively by concave surface type fluidic oscillator 3, vortex amplifier pedestal 4 and bottom plate 5；Concave surface type fluidic oscillator 3 is penetrated including one
Flow oscillator entrance II, two fluidic oscillator control chambers III and two fluidic oscillator Efferent tubes IV；Vortex amplifier pedestal 4
Inner upper end be equipped with pedestal high-drag channel VI and pedestal low resistance flow channel V, and respectively with two fluidic oscillator Efferent tubes
IV connection；4 inside middle part of vortex amplifier pedestal is equipped with vortex amplifier high-drag channel Ⅹ and vortex amplifier lower resistance is logical
Road VII, and be connected respectively with pedestal high-drag channel VI and pedestal low resistance flow channel V；Subordinate in vortex amplifier pedestal 4
End is equipped with vortex cavity radial passage entrance Ⅺ, vortex cavity Tangential Channel entrance Ⅻ and vortex cavity Ⅹ III, and wherein vortex cavity is radially logical
Road entrance Ⅺ is connected with vortex amplifier low resistance flow channel VII, vortex cavity Tangential Channel entrance Ⅻ and vortex amplifier high-drag
Channel Ⅹ is connected, and vortex cavity radial passage entrance Ⅺ and vortex cavity Tangential Channel entrance Ⅻ are connected to vortex cavity Ⅹ III；Bottom
Plate 6 is provided centrally with bottom plate axial passage VIII, and is connected to vortex cavity Ⅹ III；3 upper end of concave surface type fluidic oscillator and top connection 1
Lower end in contact is simultaneously sealed with sealing ring, 3 lower end of concave surface type fluidic oscillator and 4 upper-end contact of vortex amplifier pedestal and with sealing
Circle sealing, 4 lower end of vortex amplifier pedestal are connect with bottom plate 5 by laser welding, under lower contact 6 and vortex amplifier pedestal 4
End in contact simultaneously compresses.
Claims (2)
1. bottom pressure pulse friction reducer, it is characterised in that：It is connect with outer tube by screw thread by top connection, the outer tube other end is logical
It crosses screw thread to connect with lower contact, outer tube is followed successively by concave surface type fluidic oscillator, vortex amplifier pedestal and bottom from top to bottom
Plate；Concave surface type fluidic oscillator includes a nozzle arrangements fluidic oscillator entrance, is located at concave surface type fluidic oscillator central term
Portion is set at left and right sides of fluidic oscillator entrance there are two fluidic oscillator control chamber, set below fluidic oscillator entrance there are two
Fluidic oscillator Efferent tube；Vortex amplifier chassis interior upper end is equipped with pedestal high-drag channel and pedestal lower resistance is logical
Road, and be connected to respectively with two fluidic oscillator Efferent tubes；Vortex amplification is equipped in the middle part of the vortex amplifier chassis interior
Device high-drag channel and vortex amplifier low resistance flow channel, and respectively with vortex amplifier pedestal upper end pedestal high-drag channel
It is connected with pedestal low resistance flow channel；The vortex amplifier interior lower end is equipped with vortex cavity radial passage entrance, vortex cavity is cut
To feeder connection and vortex cavity, vortex cavity radial passage entrance is connected with vortex amplifier low resistance flow channel, and vortex cavity is tangential
Feeder connection is connected with vortex amplifier high-drag channel, and vortex cavity radial passage entrance and vortex cavity Tangential Channel entrance are equal
It is connected to vortex cavity；The bottom plate is provided centrally with bottom plate axial passage, and is connected to vortex cavity；On concave surface type fluidic oscillator
End is sealed with end in contact under top connection and with sealing ring, concave surface type fluidic oscillator lower end and vortex amplifier pedestal upper-end contact
It is used in combination sealing ring to seal, vortex amplifier pedestal lower end is connect with bottom plate by laser welding, lower contact and vortex amplifier bottom
The lower end in contact of seat simultaneously compresses composition.
2. bottom pressure pulse friction reducer as described in claim 1, it is characterised in that：Concave surface type fluidic oscillator is integrally adopted
It is fabricated with W-Co kind cemented carbide material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721785601.3U CN207660544U (en) | 2017-12-19 | 2017-12-19 | Bottom pressure pulse friction reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721785601.3U CN207660544U (en) | 2017-12-19 | 2017-12-19 | Bottom pressure pulse friction reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207660544U true CN207660544U (en) | 2018-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721785601.3U Active CN207660544U (en) | 2017-12-19 | 2017-12-19 | Bottom pressure pulse friction reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207660544U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882509A (en) * | 2017-12-19 | 2018-04-06 | 中南大学 | Bottom pressure pulse friction reducer |
-
2017
- 2017-12-19 CN CN201721785601.3U patent/CN207660544U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882509A (en) * | 2017-12-19 | 2018-04-06 | 中南大学 | Bottom pressure pulse friction reducer |
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