CN208749326U - A kind of down-hole string self-seal device - Google Patents
A kind of down-hole string self-seal device Download PDFInfo
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- CN208749326U CN208749326U CN201821199242.8U CN201821199242U CN208749326U CN 208749326 U CN208749326 U CN 208749326U CN 201821199242 U CN201821199242 U CN 201821199242U CN 208749326 U CN208749326 U CN 208749326U
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- inner cylinder
- swivel plate
- seal device
- ontology
- seal
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Abstract
The utility model provides a kind of down-hole string self-seal device, it further include the inner cylinder for having fluid channel, the swivel plate for closing fluid channel, and the temperature-sensitive driving element of driving swivel plate rotation including the ontology being connect with tubing string, wherein, the inner cylinder is installed in the ontology by the first pin；The swivel plate is set to one end of the inner cylinder；One end that the temperature-sensitive driving element extends when the temperature rises and swivel plate is driven to turn to fluid channel, so that body interior seal pack.The utility model has many advantages, such as that security risk is small, operating efficiency is high, at low cost.
Description
Technical field
The utility model relates to oil/gas well completion practice field more particularly to a kind of down-hole string self-seal devices.
Background technique
In oil/gas well completion practice, especially in high temperature and pressure oil/gas well, underground sealing device is generallyd use to guarantee
The success rate of packer setting.I.e. underground sealing device is lowered into underground with completion tubular column, in place afterwards using from well head pitching or
Bott stick opens sliding sleeve circulation annular space under the conditions of realizing hydraulic setting packer, reverse pressure-bearing to the mode in the sealing device of underground
Protection liquid, suppress be detached from oil pipe establish the functions such as fluid course.
But existing underground sealing device has the disadvantage that pitching cannot bear the reversed pressure of formation fluid application
Power, so that there are huge security risks for top completion practice, it is more significant especially in high-pressure oil-gas well；And use bott stick
When, the bott stick of investment needs just to can be carried out next process after taking out, and which increase operations number and workload, operating costs
It is high.
Utility model content
The technical problems to be solved in the utility model be overcome the deficiencies of the prior art and provide a kind of security risk it is small, make
High-efficient, the at low cost down-hole string self-seal device of industry.
In order to solve the above technical problems, the utility model proposes technical solution are as follows:
A kind of down-hole string self-seal device, including the ontology being connect with tubing string, further include with fluid channel inner cylinder,
Close the swivel plate of fluid channel, and the temperature-sensitive driving element of driving swivel plate rotation, wherein the inner cylinder passes through the first pin
Nail is installed in the ontology；The swivel plate is set to one end of the inner cylinder；The temperature-sensitive driving element is when the temperature rises
One end for extending and swivel plate being driven to turn to fluid channel, so that body interior seal pack.
As a further improvement of the above technical scheme:
The fluid channel and swivel plate are two, and the cross sectional shape of each fluid channel and swivel plate is right angle fan
Shape, and the swivel plate is alternately arranged with fluid channel.
Along the conveying direction of downhole fluid, the swivel plate is set to the output end of the inner cylinder.
The temperature-sensitive driving element is memory spring, and one end of the memory spring is fixed on the inner cylinder, the note
The other end for recalling spring is connect with the swivel plate.
The swivel plate is installed on one end of the inner cylinder by mounting assembly, and the mounting assembly includes installation axle and tight
Firmware, one end of the installation axle are fixed on the central axis of the inner cylinder, described in the other end stretching of the installation axle
Inner cylinder；The swivel plate is rotationally sheathed on the extension end of the installation axle, and the fastener by being bolted in installation axle
Axial limiting.
Down-hole string self-seal device further includes the ball seat body when pitching is suppressed with pitching sealing cooperation, along downhole fluid
Injection direction, the ball seat body are set to the upstream of the inner cylinder.
The ball seat body is equipped with the through hole that passes through for downhole fluid, the through hole far from one end of inner cylinder be equipped with
The taper fit face of pitching sealing cooperation.
The ball seat body is installed in the ontology by the second pin.
Seal assembly is equipped between the ball seat body and ontology, the seal assembly includes seal groove and sealing ring, described
Seal groove is set on ball seat body, and one end of the sealing ring is clamped in seal groove, the other end of the sealing ring and ontology
Inner sidewall is in close contact
The both ends of the ontology are respectively equipped with the female thread connecting with top tubing string, and the pin thread connecting with lower part tubing string.
Compared with the prior art, the advantages of the utility model are:
The down-hole string self-seal device of the utility model is provided with inner cylinder, swivel plate and temperature-sensitive driving element.Inner cylinder is logical
It crosses the first pin to be installed in ontology, swivel plate is set to one end of inner cylinder；Temperature-sensitive driving element extends when the temperature rises and band
Dynamic swivel plate turns to one end of fluid channel, so that body interior seal pack, makes down-hole string self-seal device can
Bear the buffer brake that formation fluid applies, avoid pitching can not reverse pressure-bearing bring security risk, and in completion practice
Afterwards, the first pin is cut by pressure, the component on inner cylinder and inner cylinder can fall into shaft bottom, reserve oil gas oil inlet passage, avoid
Bott stick takes out the generation of operation cumbersome phenomenon.I.e. the utility model is effectively set same in positive pressure-bearing completion packer
When, can reverse pressure-bearing guarantee the smooth implementation of top completion practice, operational security is high；It, can be fast and after the completion of completion practice
Run-up founds oil/gas well and produces channel, and operating efficiency is high, at low cost.Meanwhile it being stretched when the temperature rises using temperature-sensitive driving element
Grow and drive swivel plate close fluid channel mode is easy to operate, structure is simple.
Detailed description of the invention
Hereinafter the utility model will be described in more detail based on the embodiments and with reference to the accompanying drawings.Wherein:
Fig. 1 is the structural schematic diagram of the utility model down-hole string self-seal device.
Fig. 2 is the positional diagram of the utility model inner cylinder and swivel plate (fluid channel is not turned off state).
Fig. 3 is the positional diagram (fluid channel closed state) of the utility model inner cylinder and swivel plate.
Each label indicates in figure:
1, ontology；11, female thread；12, pin thread；2, inner cylinder；21, fluid channel；3, swivel plate；4, temperature-sensitive driving element；41,
Memory spring；5, the first pin；6, mounting assembly；61, installation axle；62, fastener；7, ball seat body；71, through hole；72, taper
Mating surface；8, the second pin；9, seal assembly；91, seal groove；92, sealing ring.
Specific embodiment
The utility model is described in further details below in conjunction with Figure of description and specific embodiment, but not because
This and limit the protection scope of the utility model.
If Fig. 1 to Fig. 3 shows the embodiment of the down-hole string self-sealing blanking plug of the utility model, down-hole string is from close
Envelope blanking plug is mainly used in oil/gas well well-completing process, especially in high temperature and pressure, high angle hole and horizontal well completion operation
It is widely used.In the present embodiment, down-hole string self-seal device includes ontology 1, inner cylinder 2, swivel plate 3 and temperature-sensitive driving element 4.
Wherein, ontology 1 is threadedly connected to the lower section of oil pipe column, can be with oil pipe column G.I.H together；Inner cylinder 2 is equipped with for fluid
By fluid channel 21, inner cylinder 2 is installed in ontology 1 by the first pin 5；Swivel plate 3 is set to one end of inner cylinder 2；Temperature-sensitive
Driving element 4 extends when the temperature rises, and swivel plate 3 is driven to turn to one end of fluid channel 21, and swivel plate 3 rotate in place
Fluid channel 21 is closed afterwards.It is extended when the temperature rises using temperature-sensitive driving element 4 and swivel plate 3 is driven to close fluid channel 21
Mode is easy to operate, structure is simple.
The down-hole string self-seal device of the utility model is driven by the elongation of temperature-sensitive driving element 4 when the temperature rises
Swivel plate 3 turns to one end of fluid channel 21, so that the inner sealing of ontology 1 insulates, down-hole string self-sealing is filled
The buffer brake that can bear formation fluid application is set, avoiding pitching can not reverse pressure-bearing bring security risk.Meanwhile complete
After well operations, the first pin 5 is cut by pressure, the component on inner cylinder 2 and inner cylinder 2 can fall into shaft bottom, reserve oil gas oil inlet
Channel avoids the generation that bott stick takes out the cumbersome phenomenon of operation.I.e. the utility model is effective in positive pressure-bearing completion packer
While setting, can reverse pressure-bearing guarantee the smooth implementation of top completion practice, operational security is high；And completion practice is completed
Afterwards, oil/gas well production channel can be quickly established, operating efficiency is high, at low cost.
Further, as shown in Figures 2 and 3, fluid channel 21 and swivel plate 3 are two.Each fluid channel 21 and rotation
The cross sectional shape of rotating plate 3 is right angle fan, so that one end of fluid channel 21 can be completely covered in swivel plate 3 after rotateing in place,
Guarantee the seal pack of 1 inner passage of ontology, sealing effect is good.Meanwhile swivel plate 3 is alternately arranged with fluid channel 21, is made
Interference can not be generated when the driving of temperature-sensitive driving element 4 rotates in same direction by obtaining two swivel plates 3, and it is logical effectively to seal corresponding fluid
Road 21, easy to operate, high sealing reliability.In other embodiments, the setting position and shape of swivel plate 3 and fluid channel 21
As long as shape can guarantee that swivel plate 3 can effectively seal corresponding fluid channel 21, as fluid channel 21 be provided in round it is logical
Road, swivel plate 3 cover one end of circular channel after being rotated in place.
Further, temperature-sensitive driving element 4 is memory spring 41.One end of memory spring 41 is fixed on inner cylinder 2, memory
The other end of spring 41 is connect with swivel plate 3.Memory spring 41 can be self-healing former length as the temperature rises, to drive rotation
Plate 3 turns to one end of fluid channel 21, closes fluid channel 21.
As shown in Figure 1, swivel plate 3 is set to the output end of inner cylinder 2 along the conveying direction of downhole fluid, it is logical to close fluid
Reverse pressure-bearing is realized in road 21, and avoiding pitching can not reverse pressure-bearing bring security risk.In other embodiments, swivel plate 3
It can also be set to the input terminal of inner cylinder 2, there are fluids for fluid channel 21 at this time, but are seal pack inside the ontology 1 of 2 upstream of inner cylinder
State.
In the present embodiment, swivel plate 3 is installed on one end of inner cylinder 2 by mounting assembly 6, and mounting assembly 6 includes installation axle
61 and fastener 62.Wherein, one end of installation axle 61 is fixed on the central axis of inner cylinder 2, and the other end of installation axle 61 is stretched
Inner cylinder 2 out；Swivel plate 3 is rotationally sheathed on the extension end of installation axle 61, and the fastener by being bolted in installation axle 61
62 axial limitings.The setting of mounting assembly 6 ensure that reliable effective rotation of the swivel plate 3 under the driving of memory spring 41, and tie
Structure is simple.In the present embodiment, installation axle 61 is bolted in inner cylinder 2, and fastener 62 is fastening bolt.
As shown in Figure 1, down-hole string self-sealing blanking plug further includes ball seat body 7, ball seat body 7 is when pitching is suppressed and pitching
Sealing cooperation.Along downhole fluid injection direction, ball seat body 7 is set to the upstream of inner cylinder 2, envelope can be realized in such a way that pitching builds the pressure
Every the whereabouts of device set with inner cylinder 2, ball seat body 7.Ball seat body 7 is installed in ontology 1 by the second pin 8, in the complete well in top
After the completion of operation, the second pin 8 is cut in such a way that well head is suppressed or pitching is suppressed, ball seat body 7 falls into shaft bottom.
Further, ball seat body 7 is equipped with through hole 71, and through hole 71 is the circulation passage of downhole fluid.Through hole 71
One end far from inner cylinder 2 is equipped with taper fit face 72, and taper fit face 72 and pitching sealing cooperate, and further ensures packing
Device is effectively set.
Further, seal assembly 9 is equipped between ball seat body 7 and ontology 1.Seal assembly 9 includes seal groove 91 and sealing
Circle 92, seal groove 91 be set to ball seat body 7 on, one end of sealing ring 92 is clamped in seal groove 91, the other end of sealing ring 92 with
The inner sidewall of ontology 1 is in close contact.The sealing effect between ball seat body 7 and ontology 1 has been effectively ensured in it.
In the present embodiment, the both ends of ontology 1 are respectively equipped with the female thread 11 connecting with top tubing string, and connect with lower part tubing string
The pin thread 12 connect, to guarantee the connection effect of down-hole string self-seal device and tubing string.
In the present embodiment, the specific implementation step of down-hole string self-seal device is as follows: (1) before completion practice, by well
Lower tubular column self-seal device is connected to tubing string lower part, running string to predetermined depth；(2) it from well head pitching, suppresses and sets packing
Device, at the same time, memory spring 41 stretch under the action of downhole fluid temperature, and swivel plate 3 is under spring tension effect at this time
Rotation, and the fluid channel 21 of inner cylinder 2 is closed, so that the inner sealing of ontology 1 insulates, top operation is carried out later (as opened
Sliding sleeve, replacement annular protective liquid etc.)；(3) it after completing completion practice, is suppressed from well head and cuts the first pin 5 and the second pin 8,
Ball seat body 7 and inner cylinder 2 fall into shaft bottom, reserve the channel that oil gas enters oil pipe.
Although the present utility model has been described by reference to the preferred embodiments, but in the model for not departing from the utility model
In the case where enclosing, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as not depositing
In structural conflict, items technical characteristic mentioned in the various embodiments be can be combined in any way.The utility model
It is not limited to specific embodiment disclosed herein, but is included all technical solutions falling within the scope of the claims.
Claims (10)
1. a kind of down-hole string self-seal device, including the ontology being connect with tubing string, which is characterized in that further include logical with fluid
The inner cylinder in road, the swivel plate for closing fluid channel, and the temperature-sensitive driving element of driving swivel plate rotation, wherein the inner cylinder
It is installed in the ontology by the first pin；The swivel plate is set to one end of the inner cylinder；The temperature-sensitive driving element exists
One end that temperature extends when increasing and swivel plate is driven to turn to fluid channel, so that body interior seal pack.
2. down-hole string self-seal device according to claim 1, which is characterized in that the fluid channel and swivel plate are equal
It is two, the cross sectional shape of each fluid channel and swivel plate is right angle fan, and the swivel plate replaces with fluid channel
Arrangement.
3. down-hole string self-seal device according to claim 2, which is characterized in that along the conveying direction of downhole fluid,
The swivel plate is set to the output end of the inner cylinder.
4. down-hole string self-seal device as claimed in any of claims 1 to 3, which is characterized in that the temperature-sensitive
Driving element is memory spring, and one end of the memory spring is fixed on the inner cylinder, the other end of the memory spring with
The swivel plate connection.
5. down-hole string self-seal device as claimed in any of claims 1 to 3, which is characterized in that the rotation
Plate is installed on one end of the inner cylinder by mounting assembly, and the mounting assembly includes installation axle and fastener, the installation axle
One end be fixed on the central axis of the inner cylinder, the other end of the installation axle stretches out the inner cylinder；The swivel plate
Rotationally it is sheathed on the extension end of the installation axle, and the fastener axial limiting by being bolted in installation axle.
6. down-hole string self-seal device as claimed in any of claims 1 to 3, which is characterized in that further include
With the ball seat body of pitching sealing cooperation when pitching is suppressed, along downhole fluid injection direction, the ball seat body is set to the inner cylinder
Upstream.
7. down-hole string self-seal device according to claim 6, which is characterized in that the ball seat body is equipped with for underground
The through hole that fluid passes through, the through hole are equipped with the taper fit face with pitching sealing cooperation far from one end of inner cylinder.
8. down-hole string self-seal device according to claim 6, which is characterized in that the ball seat body passes through the second pin
It is installed in the ontology.
9. down-hole string self-seal device according to claim 8, which is characterized in that set between the ball seat body and ontology
There is seal assembly, the seal assembly includes seal groove and sealing ring, and the seal groove is set on ball seat body, the sealing ring
One end is clamped in seal groove, and the other end of the sealing ring and the inner sidewall of ontology are in close contact.
10. down-hole string self-seal device as claimed in any of claims 1 to 3, which is characterized in that the ontology
Both ends be respectively equipped with the female thread connecting with top tubing string, and the pin thread connecting with lower part tubing string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821199242.8U CN208749326U (en) | 2018-07-26 | 2018-07-26 | A kind of down-hole string self-seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821199242.8U CN208749326U (en) | 2018-07-26 | 2018-07-26 | A kind of down-hole string self-seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208749326U true CN208749326U (en) | 2019-04-16 |
Family
ID=66059132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821199242.8U Active CN208749326U (en) | 2018-07-26 | 2018-07-26 | A kind of down-hole string self-seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208749326U (en) |
-
2018
- 2018-07-26 CN CN201821199242.8U patent/CN208749326U/en active Active
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