CN204511322U - A kind of insulated tubing of filling inorganic foamed material - Google Patents
A kind of insulated tubing of filling inorganic foamed material Download PDFInfo
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- CN204511322U CN204511322U CN201520073150.5U CN201520073150U CN204511322U CN 204511322 U CN204511322 U CN 204511322U CN 201520073150 U CN201520073150 U CN 201520073150U CN 204511322 U CN204511322 U CN 204511322U
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- outer tube
- pipe
- foamed material
- bushing
- inorganic foamed
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Abstract
The utility model relates to a kind of insulated tubing of filling inorganic foamed material, and it comprises box cupling, outer tube, interior pipe, insulator, bushing pipe, insulation bushing and sealing ring; Described box cupling one end is connected with described outer tube by screw thread, is provided with the described interior pipe of circular arc in described outer tube; The two ends of described interior pipe are welded with described outer tube wall face respectively, and form annular space space between described outer tube wall face; In described annular space space, be filled with inorganic foamed material form described insulator; Be positioned at described box cupling, the described inner pipe end in described outer tube is provided with described bushing pipe, is set with described insulation bushing outside described bushing pipe; Between described bushing pipe and described box cupling, described sealing ring is provided with in described bushing pipe end.The utility model provides the hydrogen freely-movable in a kind of annular space being infiltrated vacuum heat-insulation oil pipe by prevention to manufacture the method for insulated tubing with the filling obturator-type inorganic foamed material of prolong insulation tubing life, can be widely used in heavy crude heat extraction technique.
Description
Technical field
The utility model relates to a kind of insulated tubing, particularly about a kind of insulated tubing of filling inorganic foamed material.
Background technology
Heavy crude heat extraction adopts high-temperature water vapor send in and out usually, adopts insulated tubing delivering vapor to reduce heat-energy losses.The oil pipe of vacuum heat-insulation technology is adopted usually to have best effect of heat insulation, but vacuum heat-insulation oil pipe often occurs that several moon or one or two years are with regard to premature failure in practice, and operation on the sea difficulty is far above land operation, therefore the problem of prolong insulation oil pipe effective storage life is very important.
The reason analyzing vacuum heat-insulation oil pipe premature failure can find, this is because the water vapour of down-hole injection is often be in subcritical or supercriticality, viscous crude can produce chemical reaction at these elevated temperatures, separate out hydrogen, the molecular volume of hydrogen is minimum, can penetrate the metallic molecule gap not having defective sheet metal under a certain pressure, this phenomenon is called as hydrogen and oozes phenomenon.Because the molecular weight of hydrogen is minimum, so hydrogen molecule movement velocity is higher than the nitrogen molecule in air and oxygen molecule, be several times as much as air with wall collision frequency, hydrogen molecule is the direct positive energy exchange with wall in an impact, thus hydrogen is the best gas of the capacity of heat transmission, and about 7 times to air.Hydrogen molecule at high temperature under high pressure, enters vacuum heat-insulation space (being commonly referred to " annular space ") through vacuum heat-insulation oil pipe steel pipe gradually.This process, through the regular hour, accumulates enough hydrogen in annular space, causes heat conductivility to rise more than 10 times, forms vacuum heat-insulation oil pipe premature failure.
The metal material such as common steel all cannot stop hydrogen to pass completely, the coating that existing method comprises the hydrogen absorbent amount increased in annular space, increase reduction hydrogen oozes on tube wall and employing alloy material are to lower hydrogen infiltration rate degree, but hydrogen oozes and causes the problem of oil pipe premature failure not solve completely, and said method cannot meet industrial requirements.
Summary of the invention
For the problems referred to above, the purpose of this utility model be to provide a kind of by stop infiltrate vacuum heat-insulation oil pipe annular space in hydrogen freely-movable with the insulated tubing of the filling inorganic foamed material of prolong insulation tubing life.
For achieving the above object, the utility model takes following technical scheme: a kind of insulated tubing of filling inorganic foamed material, is characterized in that: it comprises box cupling, outer tube, interior pipe, insulator, bushing pipe, insulation bushing and sealing ring; Described box cupling one end is connected with described outer tube by screw thread, is provided with the described interior pipe of circular arc in described outer tube; The two ends of described interior pipe are welded with described outer tube wall face respectively, and form annular space space between described outer tube wall face; The insulator that obturator-type inorganic foamed material is formed is filled with in described annular space space; Be positioned at described box cupling, the described inner pipe end in described outer tube is provided with described bushing pipe, is set with described insulation bushing outside described bushing pipe; Between described bushing pipe and described box cupling, described sealing ring is provided with in described bushing pipe end.
The thickness of described insulator is 5 ~ 20 millimeters.
Described insulator is obturator-type foam glass or hollow glass micropearl or hollow glass micro-ball.
Described insulator is the mixture of hollow glass micropearl and hollow glass micro-ball.
The utility model is owing to taking above technical scheme, it has the following advantages: 1, the utility model fills obturator-type inorganic foamed material as insulator owing to adopting in the annular space between the outer tube and interior pipe of insulated tubing, making to infiltrate hydrogen in annular space can only freely-movable in the micropore of inorganic foamed material, the heat of micropore high temperature face is passed to low temperature face, directly heat cannot be passed to low temperature face from annular space high temperature face.When hydrogen successively passes multi-layer solid wall with slower speed, lose the direct capacity of heat transmission as heat transfer medium, therefore relative to free-moving hydrogen in a vacuum, the hydrogen conductive force of moving in the micropore of inorganic foamed material significantly declines, and can not be increased to a certain degree gradually along with the infiltration capacity of hydrogen and the heat-insulating capability of insulated tubing significantly be declined.2, the utility model is owing to adopting inorganic foamed material as insulator, the foamed gas (mainly carbon dioxide) after in hydrogen infiltration into microporous and in inorganic foamed material is made to form hydrogen-carbon dioxide gas mixture, its coefficient of thermal conductivity is far smaller than pure hydrogen coefficient of thermal conductivity, and the capacity of heat transmission significantly can not rise along with the increase of hydrogen infiltration capacity, therefore significantly can postpone the out-of-service time of insulated tubing.3, the utility model is owing to adopting the annular space thickness increased between the outer tube of insulated tubing and interior pipe, makes the insulated tubing heat-proof quality of filling inorganic foamed material can reach insulation level when vacuum heat-insulation oil pipe does not have hydrogen to ooze.In sum, the utility model can be widely used in heavy crude heat extraction technique.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1, the utility model provides a kind of insulated tubing of filling inorganic foamed material, and it comprises box cupling 1, outer tube 2, interior pipe 3, insulator 4, bushing pipe 5, insulation bushing 6 and sealing ring 7.Box cupling 1 one end is connected with outer tube 2 by screw thread, is provided with the interior pipe 3 of circular arc in outer tube 2.The two ends of interior pipe 3 are welded with outer tube 2 internal face respectively, and form annular space space between outer tube 2 internal face, are filled with the insulator 4 that inorganic foamed material is formed in annular space space.Be positioned at box cupling 1, in outer tube 2, pipe 3 end is provided with bushing pipe 5, is set with insulation bushing 6 outside bushing pipe 5.Between bushing pipe 5 and box cupling 1, sealing ring 7 is provided with in bushing pipe 5 end.
Insulator 4 adopts the obturator-type expanded material in inorganic foamed material, as the mixture of foam glass, hollow glass micropearl, hollow glass micro-ball or a few person above.The insulator 4 that inorganic foamed material is formed is filled with in annular space space between outer tube 2 and interior pipe 3, the heat-proof quality of such insulated tubing is a little less than vacuum heat-insulation oil pipe, but the coefficient of thermal conductivity of filling inorganic foamed material is still lower, within the scope of insulated tubing acceptable.
In a preferred embodiment, insulator 4 thickness between outer tube 2 and interior pipe 3 is 5 ~ 20 millimeters, and the thickness of insulator 4 is 15 ~ 18 millimeters.Can make to fill the insulated tubing heat-proof quality of inorganic foamed material like this and reach insulation level when vacuum heat-insulation oil pipe does not have hydrogen to ooze.
In a preferred embodiment, insulator 4 adopts obturator-type foam glass, and the coefficient of thermal conductivity of obturator-type foam glass is 0.03 ~ 0.05W/ (mK), and pore diameter range 0.1 ~ 2mm, apparent density is about 50 ~ 120kg/m
3.
In a preferred embodiment, insulator 4 adopts hollow glass micropearl, and hollow glass micropearl particle diameter is 15 ~ 135 μm, and real density is about 120kg/m
3, coefficient of thermal conductivity≤0.045W/ (mK).
In a preferred embodiment, insulator 4 adopts hollow glass micro-ball, hollow glass micro-ball diameter between 1 ~ 10mm, bulk density≤100kg/m
3, pore enclosed more than 95%, coefficient of thermal conductivity≤0.050W/ (mK).
In a preferred embodiment, insulator 4 adopts the mixture of hollow glass micropearl and hollow glass micro-ball, and the hole between hollow glass micro-ball can filling hollow glass micropearl.
The various embodiments described above are only for illustration of the utility model; wherein the structure of each parts, connected mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solutions of the utility model and improvement, all should not get rid of outside protection domain of the present utility model.
Claims (4)
1. fill an insulated tubing for inorganic foamed material, it is characterized in that: it comprises box cupling, outer tube, interior pipe, insulator, bushing pipe, insulation bushing and sealing ring; Described box cupling one end is connected with described outer tube by screw thread, is provided with the described interior pipe of circular arc in described outer tube; The two ends of described interior pipe are welded with described outer tube wall face respectively, and form annular space space between described outer tube wall face; The insulator that obturator-type inorganic foamed material is formed is filled with in described annular space space; Be positioned at described box cupling, the described inner pipe end in described outer tube is provided with described bushing pipe, is set with described insulation bushing outside described bushing pipe; Between described bushing pipe and described box cupling, described sealing ring is provided with in described bushing pipe end.
2. a kind of insulated tubing of filling inorganic foamed material as claimed in claim 1, is characterized in that: the thickness of described insulator is 5 ~ 20 millimeters.
3. a kind of insulated tubing of filling inorganic foamed material as claimed in claim 1 or 2, is characterized in that: described insulator is obturator-type foam glass or hollow glass micropearl or hollow glass micro-ball.
4. a kind of insulated tubing of filling inorganic foamed material as claimed in claim 1 or 2, is characterized in that: described insulator is the mixture of hollow glass micropearl and hollow glass micro-ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520073150.5U CN204511322U (en) | 2015-02-02 | 2015-02-02 | A kind of insulated tubing of filling inorganic foamed material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520073150.5U CN204511322U (en) | 2015-02-02 | 2015-02-02 | A kind of insulated tubing of filling inorganic foamed material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204511322U true CN204511322U (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520073150.5U Active CN204511322U (en) | 2015-02-02 | 2015-02-02 | A kind of insulated tubing of filling inorganic foamed material |
Country Status (1)
| Country | Link |
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| CN (1) | CN204511322U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299824A (en) * | 2016-04-16 | 2017-10-27 | 山东鸿盛石油化工装备有限公司 | A kind of insulated tubing with box cupling insulation system |
| CN109057723A (en) * | 2018-08-07 | 2018-12-21 | 河北华北石油荣盛机械制造有限公司 | A kind of core layer foaming complex heat-preservation abrasion-proof oil conduit |
| RU2766464C1 (en) * | 2021-07-09 | 2022-03-15 | Андрей Юрьевич Дубровин | Tubing string with heat-insulating coating |
| RU2780036C1 (en) * | 2022-06-10 | 2022-09-19 | Андрей Юрьевич Дубровин | Tubing with heat-insulating coating |
-
2015
- 2015-02-02 CN CN201520073150.5U patent/CN204511322U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299824A (en) * | 2016-04-16 | 2017-10-27 | 山东鸿盛石油化工装备有限公司 | A kind of insulated tubing with box cupling insulation system |
| CN109057723A (en) * | 2018-08-07 | 2018-12-21 | 河北华北石油荣盛机械制造有限公司 | A kind of core layer foaming complex heat-preservation abrasion-proof oil conduit |
| RU2766464C1 (en) * | 2021-07-09 | 2022-03-15 | Андрей Юрьевич Дубровин | Tubing string with heat-insulating coating |
| RU2780036C1 (en) * | 2022-06-10 | 2022-09-19 | Андрей Юрьевич Дубровин | Tubing with heat-insulating coating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |