CN208089239U - A kind of sheath formula vacuum heat insulation tube - Google Patents
A kind of sheath formula vacuum heat insulation tube Download PDFInfo
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- CN208089239U CN208089239U CN201820357622.3U CN201820357622U CN208089239U CN 208089239 U CN208089239 U CN 208089239U CN 201820357622 U CN201820357622 U CN 201820357622U CN 208089239 U CN208089239 U CN 208089239U
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- tube
- intermediate tube
- vacuum heat
- insulation
- undergauge
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Abstract
The utility model is related to the underground steam injection equipment of oil-field thick-oil thermal recovery operation, disclose a kind of sheath formula vacuum heat insulation tube, including outer tube, the first intermediate tube, inner tube, the second intermediate tube and box cupling, said inner tube both ends threading, one end is welded at reserved external thread length with the first intermediate tube undergauge end, and the other end welds at reserved external thread length with the second intermediate tube undergauge end；The non-reducing end of outer tube is welded with the expanding end of the first intermediate tube, and undergauge end is welded with the non-reducing end of the second intermediate tube；It filling with insulation material and is vacuumized in the annular space that outer tube, the first intermediate tube, inner tube and the second intermediate tube are constituted；Inner tube is connect with box cupling thread seal, it is equipped with sealing ring in the second intermediate tube non-reducing end commissure, pass through the design method of the sheath formula juxtaposition thermal insulation layer of vacuum heat-insulation tube body annular space, utilize the excellent adiabatic capacity of vacuum heat insulation tube tube body, it effectively solves the problems, such as the heat loss at instlated tubular string collar " hot spot " and casing damage, improves vacuum heat-insulation tubing string integral heat-insulation property.
Description
Technical field
The utility model is related to the underground steam injection equipment of oil-field thick-oil thermal recovery operation, and in particular to a kind of sheath formula vacuum every
Heat pipe is used for steam injection producing well.
Background technology
With the sustainable growth of the development and consumption of petroleum amount of oil exploitation technology, thickened oil recovery has become oil production rate master
Want one of source, instlated tubular tubing string is one of key facility energy-efficient in heavy oil exploitation via steam injection field, heat-proof quality
Thermal recovery effect is directly affected, heat-insulated tubing and casing is connected by box cupling, which directly contacts with steam, in gas injection process
The heat loss of 70-80% betides the connecting portion, is the heat radiation point of entire instlated tubular tubing string, the presence meeting of heat radiation point at box cupling
Heat loss is caused to increase, the damage of vaporization burn into casing occurs in box cupling and falls the accidents such as well.
The main technique for solving the junction heat loss at present be inside box cupling J values position installation by polytetrafluoroethylene (PTFE) every
The insulation bushing of hot material and steel lining composition, to reduce the heat loss of heat radiation point at heat-insulated tubing and casing string collar, the method one
Determine to reduce the heat loss at this in degree, but insulation bushing still has that heat insulation is poor, down-hole operation is complicated and heat shield liner
Set biasing leads to problems such as the tool of going into the well be hampered.
Invention content
To overcome the deficiencies of existing technologies, the utility model provides a kind of sheath formula vacuum heat insulation tube, true by sheath formula
The design method of the juxtaposition thermal insulation layer of empty heat-insulated tube body annular space, utilizes the excellent thermal insulation of sheath formula vacuum heat insulation tube tube body
Can, effectively solve the problems, such as the heat loss at instlated tubular string collar " hot spot " and casing damage.
The technical scheme adopted by the utility model is that：A kind of sheath formula vacuum heat insulation tube, including outer tube 1, the first intermediate tube
2, inner tube 3, the second intermediate tube 6 and box cupling 7,3 both ends threading of said inner tube, one end is at reserved external thread length with the
One intermediate tube, 2 undergauge end is welded, and the other end welds at reserved external thread length with 6 undergauge end of the second intermediate tube；The outer tube 1
Non- reducing end is welded with 2 expanding end of the first intermediate tube, and undergauge end is welded with 6 non-reducing end of the second intermediate tube；In outer tube 1, first
Between filling with insulation material 4 and vacuumize in the annular space 5 that constitutes of pipe 2, inner tube 3 and the second intermediate tube 6；Inner tube 3 and 7 screw thread of box cupling are close
Envelope connection is equipped with sealing ring 8 in 6 non-reducing end commissure of the second intermediate tube.
Above-mentioned technical proposal can advanced optimize for：
First intermediate tube（2）Internal diameter and the second intermediate tube（6）Outer diameter is identical.
Hydrogen agent is inhaled in filling in the annular space 5.
The sheath formula juxtaposition that sheath formula vacuum heat insulation tube provided by the utility model passes through vacuum heat-insulation tube body annular space
The design method of thermal insulation layer effectively solves instlated tubular string collar " heat using the excellent adiabatic capacity of vacuum heat insulation tube tube body
Heat loss and casing at point " damage problem, improve vacuum heat-insulation tubing string integral heat-insulation property.
Description of the drawings
Fig. 1 is the sheath formula vacuum heat insulation tube structural schematic diagram of the utility model embodiment；
Fig. 2 is the sheath formula vacuum heat insulation tube application schematic diagram of the utility model embodiment；
In figure：1- outer tubes, the first intermediate tubes of 2-, 3- inner tubes, 4- heat-barrier materials, 5- annular spaces, the second intermediate tubes of 6-, 7- connect
Hoop, 8- sealing rings.
Specific implementation mode
Referring to Figures 1 and 2, in a kind of sheath formula vacuum heat insulation tube, including outer tube 1, the first intermediate tube 2, inner tube 3, second
Between pipe 6 and box cupling 7,3 both ends threading of said inner tube, one end at reserved external thread length with 2 undergauge of the first intermediate tube
End welding, the other end weld at reserved external thread length with 6 undergauge end of the second intermediate tube；1 non-reducing end of the outer tube and the
One intermediate tube, 2 expanding end welding, undergauge end is welded with 6 non-reducing end of the second intermediate tube；Outer tube 1, the first intermediate tube 2,3 and of inner tube
It filling with insulation material 4 and is vacuumized in the annular space 5 that second intermediate tube 6 is constituted；Inner tube 3 is connect with 7 thread seal of box cupling, second
6 non-reducing end commissure of intermediate tube is equipped with sealing ring 8；After inner tube 3 is connect with 7 thread seal of box cupling, outer tube 1 and the first intermediate tube
5 part of annular space that 5 part of annular space of formation is formed with inner tube 3 and the second intermediate tube constitutes sheath formula structure, in annular space 5 filling every
Hot material 4 simultaneously vacuumizes to form two layers of thermal insulation layer, juxtaposition, and 5 are farthest reduced at conduction, convection current, three aspect of radiation
The heat loss of instlated tubular；It is equipped with sealing ring 8 in 6 non-reducing end commissure of the second intermediate tube, inner tube 3 connects with 7 thread seal of box cupling
It connects, forms metal contact seal between the undergauge end of outer tube 1 and the non-reducing end of another connection outer tube 1, three seals are effectively
Reduce the heat loss at heat-insulated pipe hooping.
In a preferred embodiment, first intermediate tube（2）Internal diameter and the second intermediate tube（6）Outer diameter is identical, increases by one
Road seals, and reduces the heat loss at heat-insulated pipe hooping.
Hydrogen agent is inhaled in filling in the annular space 5, further increases the security performance of instlated tubular.
Claims (3)
1. a kind of sheath formula vacuum heat insulation tube, including outer tube（1）, the first intermediate tube（2）, inner tube（3）, the second intermediate tube（6）With
Box cupling（7）, it is characterised in that：Said inner tube（3）Both ends threading, one end is at reserved external thread length and among first
Pipe（2）Undergauge end is welded, the other end at reserved external thread length with the second intermediate tube（6）It welds at undergauge end；The outer tube（1）
Non- reducing end and the first intermediate tube（2）Expanding end welding, undergauge end and the second intermediate tube（6）Non- reducing end welding；Outer tube（1）,
First intermediate tube（2）, inner tube（3）With the second intermediate tube（6）The annular space of composition（5）Middle filling with insulation material（4）And it vacuumizes；It is interior
Pipe（3）With box cupling（7）Thread seal connects, in the second intermediate tube（6）Non- reducing end commissure is equipped with sealing ring（8）.
2. sheath formula vacuum heat insulation tube according to claim 1, it is characterised in that：First intermediate tube（2）Internal diameter and
Two intermediate tubes（6）Outer diameter is identical.
3. sheath formula vacuum heat insulation tube according to claim 2, it is characterised in that：The annular space（5）Hydrogen agent is inhaled in middle filling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820357622.3U CN208089239U (en) | 2018-03-16 | 2018-03-16 | A kind of sheath formula vacuum heat insulation tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820357622.3U CN208089239U (en) | 2018-03-16 | 2018-03-16 | A kind of sheath formula vacuum heat insulation tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208089239U true CN208089239U (en) | 2018-11-13 |
Family
ID=64059182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820357622.3U Active CN208089239U (en) | 2018-03-16 | 2018-03-16 | A kind of sheath formula vacuum heat insulation tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208089239U (en) |
-
2018
- 2018-03-16 CN CN201820357622.3U patent/CN208089239U/en active Active
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