CN207701098U - Gas lift reverse circulation drilling well air and liquid mixer - Google Patents
Gas lift reverse circulation drilling well air and liquid mixer Download PDFInfo
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- CN207701098U CN207701098U CN201721551620.XU CN201721551620U CN207701098U CN 207701098 U CN207701098 U CN 207701098U CN 201721551620 U CN201721551620 U CN 201721551620U CN 207701098 U CN207701098 U CN 207701098U
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Abstract
This application discloses a kind of gas lift reverse circulation drilling well air and liquid mixers, including：Outer tube, the upper end of outer tube with the outer tube of double-wall drill pipe for connecting, and the lower end of outer tube with single wall drilling rod for connecting；Core pipe, core pipe is coaxially disposed in outer tube, and the lower end outer wall of core pipe and the inner wall sealing of outer tube connect, the upper end of core pipe with the inner tube of double-wall drill pipe for connecting, the ring-shaped pouring flow channel being connected to for the annular space with double-wall drill pipe is formed between core pipe and outer tube, and the injecting hole inside the annular gas injection runner of multiple connections and core pipe is offered on the tube wall of core pipe.The air and liquid mixer is connected to by the ring-shaped pouring flow channel between outer tube and core pipe with the annular space of double-wall drill pipe, gas injection is carried out by injecting hole again, core pipe is used to convey the drilling fluid and landwaste in shaft bottom, increase circulation area, improve gas injection and gas-liquid mixed effect, the smooth discharge that ensure that drilling fluid and landwaste, improves deslagging ability.
Description
Technical field
The utility model is related to oil-gas drilling equipment technical field, more particularly to a kind of gas lift reverse circulation drilling well is used
Air and liquid mixer.
Background technology
Gas-lift reverses circulation technology is to make itself and brill that is, using compressed air as power using the operation principle of gas bubble pump
Flushing liquor mixing in bar and expansion work make the inside and outside fluid column of drilling rod generate pressure to form the gas-liquid mixture of low-density
Difference, and realize that from the reverse circulation drilling technology of drilling rod inner cavity cutting carring, high speed drill may be implemented in flushing liquor under differential pressure action
Into, slow down or thoroughly eliminate leakage.The technology is applied in the drilling of hydrogeologic prospecting, heavy caliber base pile hole, well and geothermal well
It is widely used in work.
Air and liquid mixer is a particularly important part in gas lift reverse circulation drilling well equipment.Gas-water mixer is a note
The upper end of shortness of breath section, gas-water mixer is connected with double-wall drill pipe, and lower end is connected with conventional single wall drilling rod.Its effect is that double-walled is allowed to bore
Compressed air in the annular space of bar enters the internal channel of double-wall drill pipe from air and liquid mixer, is mixed with drilling fluid and landwaste, is formed
The three-phase fluid of low-density, to generate gas lift liquid drainage.
Due to being that gas-liquid-solid three-phase flows in the internal channel of double-wall drill pipe, flow pattern is extremely complex, existing air and liquid mixer
Be difficult to meet the requirement of gas-liquid mixed and smooth deslagging, the quality of air and liquid mixer is not only related to shaft bottom clean-up performance and rock
It considers conveying effect to be worth doing, also contributes to the penetration rate of shaft bottom drill bit.
In conclusion how to improve the gas-liquid mixed effect and deslagging ability of air and liquid mixer, become art technology
Personnel's urgent problem to be solved.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of gas lift reverse circulation drilling well air and liquid mixers, to carry
The gas-liquid mixed effect and deslagging ability of high air and liquid mixer.
In order to achieve the above objectives, the utility model provides following technical scheme：
A kind of gas lift reverse circulation drilling well air and liquid mixer, including：
Outer tube, for being connect with the outer tube of double-wall drill pipe, the lower end of the outer tube is used for for the upper end of the outer tube
It is connect with single wall drilling rod；
Core pipe, the core pipe coaxial arrangement is in the outer tube, and the lower end outer wall of the core pipe and the outer tube
Inner wall sealing connection, the upper end of the core pipe with the inner tube of the double-wall drill pipe for connect, the core pipe and the housing
The ring-shaped pouring flow channel for being connected to the annular space of the double-wall drill pipe is formed between pipe, is offered on the tube wall of the core pipe more
A injecting hole being connected to inside the ring-shaped pouring flow channel and the core pipe.
Preferably, in above-mentioned air and liquid mixer, the upper end of the outer tube be provided with for the double-wall drill pipe
Outer tube external screw thread connection internal thread, the lower end of the outer tube is provided with for being connect with the internal thread of the single wall drilling rod
External screw thread.
Preferably, in above-mentioned air and liquid mixer, limited step, the core pipe are provided on the inner wall of the outer tube
The limit of lower end and the limited step contact, the lower end outer wall of the core pipe contacts sealing with the inner wall of the outer tube.
Preferably, in above-mentioned air and liquid mixer, the lower end outer wall of the core pipe connects with the inner wall of the outer tube
Tactile position is provided with sealing ring.
Preferably, in above-mentioned air and liquid mixer, the aperture of the injecting hole is 5mm~10mm；The injecting hole it
Between pitch-row be 10mm~40mm.
Preferably, in above-mentioned air and liquid mixer, the axis ecto-entad of the injecting hole favours the core upwards
The cross section of pipe.
Preferably, in above-mentioned air and liquid mixer, between the axis of the injecting hole and the cross section of the core pipe
Inclination angle is 0 °~30 °.
Preferably, further include junction block in above-mentioned air and liquid mixer, the lower end of the junction block and the core pipe
Upper end is tightly connected, and the upper end of the junction block with the inner tube of the double-wall drill pipe for connecting.
Preferably, in above-mentioned air and liquid mixer, the inner wall of the junction block is provided with the second limited step, the core
The upper end of pipe contacts limit, the upper end outer wall of the core pipe and the lower end inner wall phase of the junction block with second limited step
The position of contact is provided with the second sealing ring, the upper end of the junction block is provided with connect for the inner tube with double-wall drill pipe in
Screw thread.
Preferably, in above-mentioned air and liquid mixer, one or more is additionally provided on the lower end periphery of the junction block
Circumference boss.
Compared with prior art, the utility model has the beneficial effects that：
When gas lift reverse circulation drilling well provided by the utility model is worked with air and liquid mixer, by the upper end of outer tube and double-walled
The outer tube of drilling rod connects, and the lower end of outer tube is connect with single wall drilling rod；It is bored with double-walled the upper end of core pipe inside outer tube
The inner tube of bar connects, and the lower end outer wall of core pipe and the inner wall sealing of outer tube connect, and ring-shaped pouring is formed between core pipe and outer tube
Flow channel, ring-shaped pouring flow channel are connected to the annular space of double-wall drill pipe, and injecting hole is provided on the tube wall of core pipe, are injected into double-walled brill
Gas in the annular space of bar enters in ring-shaped pouring flow channel, is entered inside core pipe by injecting hole, and low-density is formed in core pipe
Gas-liquid-solid three phase flow, under the action of drilling rod inside and outside differential pressure and microbubble lifting force, shaft bottom cleaner for high-pressure drilling fluid and landwaste are by well
Bottom pass through successively single wall drilling rod, inside core pipe, double-wall drill pipe inner tube migrates to well head.
Outer tube and core pipe are coaxially disposed by the air and liquid mixer, pass through the ring-shaped pouring flow channel between outer tube and core pipe
It is connected to the annular space of double-wall drill pipe, then gas injection is carried out by the injecting hole on core pipe tube wall, meanwhile, the upper and lower ends difference of core pipe
It is connected to the inner tube of double-wall drill pipe and single wall drilling rod, drilling fluid and landwaste for conveying shaft bottom increase circulation area, and existing
Some air and liquid mixers are compared, and gas injection and gas-liquid mixed effect are improved, meanwhile, it ensure that the smooth row of drilling fluid and landwaste
Go out, improves deslagging ability, and air and liquid mixer reduces the obstruction to drilling fluid and landwaste, drilling fluid and landwaste and mixed to gas-liquid
The abrasion of clutch is small, improves the service life of air and liquid mixer.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is a kind of structural representation for gas lift reverse circulation drilling well air and liquid mixer that the utility model embodiment provides
Figure；
Fig. 2 is a kind of cross-sectional view of the junction block for air and liquid mixer that the utility model embodiment provides.
Wherein, 1 be junction block, 101 be the second limited step, 102 be circumference boss, 2 be the second sealing ring, 3 be core pipe,
301 it is injecting hole, 4 be ring-shaped pouring flow channel, 5 be outer tube, 501 be limited step, 6 is sealing ring.
Specific implementation mode
The core of the utility model improves gas-liquid mixed there is provided a kind of gas lift reverse circulation drilling well air and liquid mixer
The gas-liquid mixed effect and deslagging ability of device.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to FIG. 1, the utility model embodiment provides a kind of gas lift reverse circulation drilling well air and liquid mixer, it is simple below
Claim air and liquid mixer comprising outer tube 5 and core pipe 3；Wherein, outer tube 5 is hollow tube, the upper end of outer tube 5 be used for it is double
The outer tube of wall drilling rod connects, and the lower end of outer tube 5 with single wall drilling rod for connecting；Core pipe 3 is hollow tube, and core pipe 3 is coaxially disposed
In outer tube 5, and the lower end outer wall of core pipe 3 is connect with the inner wall sealing of outer tube 5, and the upper end of core pipe 3 is used to bore with double-walled
The inner tube of bar connects, and ring-shaped pouring flow channel 4 is formed between core pipe 3 and outer tube 5, ring-shaped pouring flow channel 4 is used for and double-wall drill pipe
Annular space connection, the injecting holes 301 inside the annular gas injection runners 4 of multiple connections and core pipe 3 are offered on the tube wall of core pipe 3, i.e.,
The upper and lower ends of core pipe 3 are connected to the inner tube of double-wall drill pipe and single wall drilling rod respectively, and ring-shaped pouring flow channel 4 and double-wall drill pipe
Annular space connection, without being connected to single wall drilling rod.
When the air and liquid mixer works, the outer tube of the upper end of outer tube 5 and double-wall drill pipe is connected, the lower end of outer tube 5
It is connect with single wall drilling rod；The upper end of core pipe 3 inside outer tube 5 and the inner tube of double-wall drill pipe connect, ring-shaped pouring flow channel 4
It is connected to the annular space of double-wall drill pipe.The gas being injected between the inner tube of double-wall drill pipe and outer tube in annular space enters ring-shaped pouring air-flow
In road 4, entered inside core pipe 3 by injecting hole 301, forms the gas-liquid-solid three of low-density with drilling fluid and landwaste in core pipe 3
Xiang Liu, under the action of drilling rod inside and outside differential pressure and microbubble lifting force, shaft bottom cleaner for high-pressure drilling fluid and landwaste are passed through successively by shaft bottom
Inside single wall drilling rod, core pipe 3, double-wall drill pipe inner tube migrates to well head.
As it can be seen that outer tube 5 and core pipe 3 are coaxially disposed by the air and liquid mixer, pass through the ring between outer tube 5 and core pipe 3
Shape gas injection runner 4 is connected to the annular space of double-wall drill pipe, then carries out gas injection by the injecting hole 301 on 3 tube wall of core pipe, meanwhile, core
The upper and lower ends of pipe 3 are connected to the inner tube of double-wall drill pipe and single wall drilling rod respectively, drilling fluid and landwaste for conveying shaft bottom, are increased
Add circulation area, compared with existing air and liquid mixer, improves gas injection and gas-liquid mixed effect, meanwhile, it ensure that drilling well
The smooth discharge of liquid and landwaste improves deslagging ability, and air and liquid mixer reduces the obstruction to drilling fluid and landwaste, drilling well
Liquid and landwaste are small to the abrasion of air and liquid mixer, improve the service life of air and liquid mixer.
In the present embodiment, the upper end of outer tube 5 is provided with the interior spiral shell being connect for the outer tube external screw thread with double-wall drill pipe
Line, the lower end of outer tube 5 are provided with the external screw thread for being connect with the internal thread of single wall drilling rod.That is the upper and lower ends of outer tube 5
It is connect respectively with the outer tube of double-wall drill pipe and single wall drill rod thread.The bonding strength of threaded connection is high, on the one hand can make gas-liquid
Mixer transmits torque, and air and liquid mixer can be used as a lifting sub, and double-wall drill pipe is connected with single wall drilling rod, is had
Enough intensity can promote single wall drilling rod.
As shown in Figure 1, in the present embodiment, limited step 501, the lower end end of core pipe 3 are provided on the inner wall of outer tube 5
Face is contacted with the limit of limited step 501, carries out axial limiting to core pipe 3, the inner wall of the lower end outer wall and outer tube 5 of core pipe 3 connects
Sealing is touched, the lower end outer wall of core pipe 3 can be connected with the inner wall of outer tube 5 by being interference fitted.
Further, in order to improve the leakproofness between the lower end outer wall of core pipe 3 and the inner wall of outer tube 5, in this implementation
In example, the position that the lower end outer wall of core pipe 3 is in contact with the inner wall of outer tube 5 is additionally provided with sealing ring 6.Specifically, in core pipe 3
Lower end outer wall on seal groove is set, in 6 embedding sealing slot of sealing ring.It is of course also possible to be arranged on the inner wall of outer tube 5 close
Sealing ring 6 is arranged in the seal groove sealing groove.Sealing ring 6 is preferably O-ring seal or y-type seal ring.
Certainly, the lower end of core pipe 3 can also be connected through a screw thread between the inner wall of outer tube 5, can equally realize core
The sealed connection of pipe 3 and outer tube 5.
In the present embodiment, 301 preferably circular hole of injecting hole can also be certainly other shapes of hole, work as injecting hole
301 be round hole when, the aperture of injecting hole 301 is preferably 5mm~10mm；Pitch-row between injecting hole 301 is 10mm~40mm.
Injecting hole 301 is on the tube wall of core pipe 3 according to certain array arrangement, specifically, axial direction and week of the injecting hole 301 along core pipe 3
To being evenly arranged, it is preferable that axially disposed eight circles injecting hole 301, the quantity for often enclosing injecting hole 301 are eight, totally six ten four
The aperture of a injecting hole 301, each injecting hole 301 can be isometrical, can not also be isometrical, is arranged according to practical air inlet demand, with
The uniformity of gas injection is improved, the mixed effect of gas and liquid is improved.
Further, in the present embodiment, the axis of injecting hole 301 from favouring outside core pipe 3 upwards to 3 inside of core pipe
The cross section of core pipe 3.That is the gas injection direction of injecting hole 301 tilts upwards, and the reacting cycle direction fair current with drilling fluid prevents air-flow
Hinder drilling fluid discharge.
As an optimization, the inclination angle between the axis of injecting hole 301 and the cross section of core pipe 3 is 0 °~30 °.The inclination angle is arranged
Best gas injection mixed effect can be reached, it is of course also possible to use other angles, it is not limited to cited by the present embodiment
Angle is arranged.
As depicted in figs. 1 and 2, in the present embodiment, air and liquid mixer further includes junction block 1, and junction block 1 is hollow tube,
The lower end of junction block 1 is tightly connected with the upper end of core pipe 3, and the upper end of junction block 1 with the inner tube of double-wall drill pipe for connecting.That is core
Pipe 3 is connect by junction block 1 with the inner tube of double-wall drill pipe, facilitates double-wall drill pipe to connect with air and liquid mixer by the way that junction block 1 is arranged
It connects.
Further, in the present embodiment, the inner wall of junction block 1 is provided with the second limited step 101, the upper end of core pipe 3
End face contacts limit with the second limited step 101, and the upper end outer wall of core pipe 3 contacts sealing with the lower end inner wall of junction block 1；It is preferred that
Ground, the position that the upper end outer wall of core pipe 3 is in contact with the lower end inner wall of junction block 1 are provided with the second sealing ring 2, specifically, core
The upper end outer wall of pipe 3 and/or the lower end inner wall of junction block 1 are provided with seal groove, and the second sealing ring 2 is flush-mounted in seal groove, with
Improve leakproofness.The upper end of junction block 1 is provided with the internal thread being connect for the inner tube with double-wall drill pipe, junction block 1 and double-walled
The lower thread of drilling rod connects, and improves bonding strength.
As shown in Fig. 2, being additionally provided with one or more circumference boss 102 on the lower end periphery of junction block 1.It is convex by circumference
Position of the 102 righting core pipe 3 of platform in outer tube 5 ensures ring-shaped pouring flow channel 4 in circumference all directions uniformity, in turn
It ensure that gas injection uniformity.The quantity of circumference boss 102 can be one, two, three or more.
In the present embodiment, the shape of outer tube 5 is cylindric, square column etc., it is not limited to cited by the present embodiment
Shape.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new
Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest range consistent with features of novelty.
Claims (10)
1. a kind of gas lift reverse circulation drilling well air and liquid mixer, which is characterized in that including：
Outer tube, for being connect with the outer tube of double-wall drill pipe, the lower end of the outer tube is used for and list for the upper end of the outer tube
Wall drilling rod connects；
Core pipe, core pipe coaxial arrangement is in the outer tube, and the lower end outer wall of the core pipe and the outer tube is interior
Wall is tightly connected, the upper end of the core pipe for connect with the inner tube of the double-wall drill pipe, the core pipe and the outer tube it
Between form ring-shaped pouring flow channel for being connected to the annular space of the double-wall drill pipe, offer multiple companies on the tube wall of the core pipe
Lead to the injecting hole inside the ring-shaped pouring flow channel and the core pipe.
2. air and liquid mixer according to claim 1, which is characterized in that the upper end of the outer tube be provided with for institute
State the internal thread of the outer tube external screw thread connection of double-wall drill pipe, the lower end of the outer tube be provided with for the single wall drilling rod
The external screw thread of internal thread connection.
3. air and liquid mixer according to claim 1, which is characterized in that be provided with limiting stand on the inner wall of the outer tube
Rank, the lower end of the core pipe are contacted with limited step limit, the inner wall of the lower end outer wall of the core pipe and the outer tube
Contact sealing.
4. air and liquid mixer according to claim 3, which is characterized in that the lower end outer wall of the core pipe and the outer tube
The position that is in contact of inner wall be provided with sealing ring.
5. air and liquid mixer according to claim 1, which is characterized in that the aperture of the injecting hole is 5mm~10mm；Institute
It is 10mm~40mm to state the pitch-row between injecting hole.
6. air and liquid mixer according to claim 5, which is characterized in that the axis ecto-entad of the injecting hole is to updip
Tiltedly in the cross section of the core pipe.
7. air and liquid mixer according to claim 6, which is characterized in that the cross of the axis of the injecting hole and the core pipe
Inclination angle between section is 0 °~30 °.
8. according to claim 1-7 any one of them air and liquid mixers, which is characterized in that further include junction block, the connector
The lower end of pipe and the upper end of the core pipe are tightly connected, and the upper end of the junction block is used to connect with the inner tube of the double-wall drill pipe
It connects.
9. air and liquid mixer according to claim 8, which is characterized in that the inner wall of the junction block is provided with the second limit
Step, the upper end of the core pipe contact limit, upper end outer wall and the junction block of the core pipe with second limited step
The position that is in contact of lower end inner wall be provided with the second sealing ring, the upper end of the junction block be provided with for double-wall drill pipe
The internal thread of inner tube connection.
10. air and liquid mixer according to claim 8, which is characterized in that also set up on the lower end periphery of the junction block
There are one or multiple circumference boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721551620.XU CN207701098U (en) | 2017-11-17 | 2017-11-17 | Gas lift reverse circulation drilling well air and liquid mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721551620.XU CN207701098U (en) | 2017-11-17 | 2017-11-17 | Gas lift reverse circulation drilling well air and liquid mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207701098U true CN207701098U (en) | 2018-08-07 |
Family
ID=63023071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721551620.XU Active CN207701098U (en) | 2017-11-17 | 2017-11-17 | Gas lift reverse circulation drilling well air and liquid mixer |
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| Country | Link |
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| CN (1) | CN207701098U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485941A (en) * | 2019-08-28 | 2019-11-22 | 奥瑞拓能源科技股份有限公司 | A kind of wired guiding gas injection slag-draining device |
| CN110608005A (en) * | 2019-10-10 | 2019-12-24 | 西南石油大学 | Gas-lift reverse circulation drilling system and automatic control method |
| CN113153142A (en) * | 2021-04-12 | 2021-07-23 | 山东省地勘局第二水文地质工程地质大队(山东省鲁北地质工程勘察院) | Hard broken formation gas lift reverse circulation drilling anti-blocking tool in geological drilling |
-
2017
- 2017-11-17 CN CN201721551620.XU patent/CN207701098U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485941A (en) * | 2019-08-28 | 2019-11-22 | 奥瑞拓能源科技股份有限公司 | A kind of wired guiding gas injection slag-draining device |
| CN110608005A (en) * | 2019-10-10 | 2019-12-24 | 西南石油大学 | Gas-lift reverse circulation drilling system and automatic control method |
| CN113153142A (en) * | 2021-04-12 | 2021-07-23 | 山东省地勘局第二水文地质工程地质大队(山东省鲁北地质工程勘察院) | Hard broken formation gas lift reverse circulation drilling anti-blocking tool in geological drilling |
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