CN210164435U - Heat-point-free heat-insulation tubing coupling heat-insulation structure - Google Patents
Heat-point-free heat-insulation tubing coupling heat-insulation structure Download PDFInfo
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- CN210164435U CN210164435U CN201920785635.5U CN201920785635U CN210164435U CN 210164435 U CN210164435 U CN 210164435U CN 201920785635 U CN201920785635 U CN 201920785635U CN 210164435 U CN210164435 U CN 210164435U
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Abstract
The utility model relates to a heat-point-free heat-insulation tubing coupling heat-insulation structure, which comprises a tubing tube body and a tubing coupling, wherein the tubing tube body comprises an outer tubing tube and an inner tubing tube, the inner tubing tube is welded and fixed inside the outer tubing tube, and a tube annular space is arranged between the outer tubing tube and the inner tubing tube, the utility model designs the tubing coupling into a vacuum heat-insulation mode by arranging the tubing coupling annular space, thereby forming a real heat-insulation tubing string structure without 'hot spots', improving the heat-insulation performance of the heat-insulation tubing string, solving the quality hidden danger caused by the vaporization corrosion of the coupling part, being capable of being popularized and applied to the fields of thick oil development, ultra-deep well heat insulation lifting and the like, having important significance for the cost reduction and efficiency improvement of thick oil thermal recovery, simultaneously arranging an inner sealing shoulder, an outer sealing shoulder and a sealing ring, and after installation, the inner, effectively preventing formation water from entering the lining material to further cause lining collapse and coupling corrosion.
Description
Technical Field
The utility model relates to a no hot spot heat-insulating tubing coupling heat insulation structure belongs to heat-insulating tubing technical field.
Background
In recent years, the heat insulation performance of the heat insulation tubing body is optimized to be extremely good (350 ℃ heat insulation grade E, lambda is less than 0.006W/(m DEG C)), the coupling of the heat insulation tubing string becomes a main heat dissipation point of the heat insulation tubing string, the coupling is called as a 'hot point' of the heat insulation tubing string, and the heat point causes the phenomenon of vaporization corrosion of the coupling easily under a specific corrosion condition of the heat insulation tubing string, so that certain quality hidden troubles exist.
In order to solve the problems, the heat insulation bushing is developed in 2012 to reduce the heat loss at the coupling and reduce the vaporization corrosion phenomenon of the coupling, and the calculation is carried out by using thermodynamic calculation software of a petrochemical heat insulation pipe column in use: heat loss of coupling without heat insulation measures: 13.73%; heat loss at the joint where the heat insulation lining is worn: 9.28% (note: setting steam injection parameters of 1250m, 4.8 ℃/100m, 13.8MPa, 9t/h and wellhead dryness of 75%), wearing the heat insulation lining to reduce heat loss at the coupling to a certain extent, but the heat insulation lining has complex installation and the eccentricity of the lining can cause well blockage accidents.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem who solves overcomes current defect, a thermal-insulated tubing coupling heat insulation structure of no hot spot is provided, the utility model discloses a set up tubing coupling annular space, with the thermal-insulated mode of tubing coupling design for the vacuum, form the most genuine no "hot" thermal-insulated tubing string structure of "hot spot", improve the heat-proof quality of thermal-insulated tubing string, solve the quality hidden danger that coupling department vapor corrosion arouses, can popularize and use the fields such as viscous oil development and super deep well heat preservation lift simultaneously, cost reduction and efficiency improvement to viscous oil thermal recovery have the significance, set up the inside seal circular bead simultaneously, outside circular bead and sealing ring, after the installation, the inside seal circular bead, outside circular bead and sealing ring interference fit, effectively prevent that stratum water from getting into inside lining material and then arousing the emergence of collapsing inside lining and coupling corruption, can effectively solve the problem in the background art.
In order to solve the technical problem, the utility model provides a following technical scheme:
a heat-insulating structure of a non-hot-spot heat-insulating tubing coupling comprises a tubing tube body and a tubing coupling, wherein the tubing tube body comprises an outer tubing tube and an inner tubing tube, the oil pipe inner pipe is welded and fixed inside the oil pipe outer pipe, a pipe body annular space is arranged between the oil pipe outer pipe and the oil pipe inner pipe, the pipe body annular space is filled with a pipe body heat insulation layer, the end part of the oil pipe body is embedded and connected in the oil pipe coupling through threads, the end part of the oil pipe body is provided with an outer sealing circular bead, the two ends of the oil pipe body are provided with inner sealing circular beads, and the inner end of the oil pipe body is provided with a sealing ring, the oil pipe coupling comprises an oil pipe coupling outer pipe and an oil pipe coupling inner pipe, the inner pipe of the tubing coupling is welded and fixed inside the outer pipe of the tubing coupling, a tubing coupling annulus is arranged between the outer pipe of the tubing coupling and the inner pipe of the tubing coupling, and a tubing coupling heat-insulating layer is filled in the tubing coupling annulus.
Further, the pipe body thermal insulation layer and the tubing coupling thermal insulation layer are made of aerogel, and the sealing ring is made of modified polytetrafluoroethylene.
Further, an internal thread is arranged at the end part of the oil pipe body, an external thread is arranged at the end part of the oil pipe coupling, and the oil pipe body and the oil pipe coupling are in threaded connection through the matching of the internal thread and the external thread.
Further, when the internal thread is in rotary engagement with the external thread, the external sealing shoulder is in interference fit with the internal sealing shoulder, and the interference magnitude is 0.05-0.15 mm.
Further, the pipe body annulus and the tubing coupling annulus are internally provided with hydrogen absorption agents, and the top of the pipe body annulus and the top of the tubing coupling annulus are provided with extraction holes.
Further, the pipe body annular space and the tubing coupling annular space are both vacuumized or refilled with inert gas.
The utility model discloses beneficial effect: the utility model discloses a set up the tubing coupling annular space, be the thermal-insulated mode of vacuum with the design of tubing coupling, form the most genuine no "hot" thermal-insulated tubing string structure of nothing, improve the heat-proof quality of thermal-insulated tubing string, solve the quality hidden danger that coupling department vapor corrosion arouses, can popularize and apply viscous crude development and fields such as super deep well heat preservation lift simultaneously, cost reduction and efficiency to the viscous crude thermal recovery increase has the significance, set up the inside seal circular bead simultaneously, outside seal circular bead and sealing ring, after the installation, the inside seal circular bead, outside seal circular bead and sealing ring interference fit, effectively prevent that stratum water from getting into interior lining material and then arousing the inside lining collapse with the emergence that the coupling corrodes.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a structural view of the present invention.
Fig. 2 is a structural diagram of the oil pipe body of the present invention.
Figure 3 is the structure diagram of the tubing coupling of the present invention.
Reference numbers in the figures: 1. an oil pipe body; 2. a tubing coupling; 3. an oil pipe outer pipe; 4. an oil pipe inner pipe; 5. a pipe body annular space; 6. a pipe body heat insulation layer; 7. an outer sealing shoulder; 8. an inner sealing shoulder; 9. a seal ring; 10. an outer pipe of the tubing coupling; 11. an inner pipe of the tubing coupling; 12. tubing coupling annular space; 13. the tubing coupling thermal-insulating layer; 14. an internal thread; 15. an external thread; 16. an internal thread; 17. and (4) air exhaust holes.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1-3, a thermal insulation structure for a tubing coupling without hot spot comprises a tubing tube 1 and a tubing coupling 2, wherein the tubing tube 1 comprises a tubing outer tube 3 and a tubing inner tube 4, the tubing inner tube 4 is welded and fixed inside the tubing outer tube 3, a tube annulus 5 is arranged between the tubing outer tube 3 and the tubing inner tube 4, the tube annulus 5 is filled with a tube thermal insulation layer 6, the end of the tubing tube 1 is connected to the tubing coupling 2 by thread insertion, the end of the tubing tube 1 is provided with an outer sealing shoulder 7, two ends of the tubing tube 1 are provided with inner sealing shoulders 8, the inner end of the tubing tube 1 is provided with a sealing ring 9, the tubing coupling 2 comprises a tubing coupling outer tube 10 and a tubing coupling inner tube 11, the tubing coupling inner tube 11 is welded and fixed inside the tubing coupling outer tube 10, an tubing coupling annular space 12 is arranged between the tubing coupling outer pipe 10 and the tubing coupling inner pipe 11, and a tubing coupling heat-insulating layer 13 is filled in the tubing coupling annular space 12.
The pipe body heat-insulating layer 6 and the tubing coupling heat-insulating layer 13 are both made of aerogel, the sealing ring 9 is made of modified polytetrafluoroethylene, an aerogel heat-insulating material is a solid material with the lowest heat conductivity coefficient at present, an internal thread is arranged at the end part of the tubing body 1, an external thread 15 is arranged at the end part of the tubing coupling 2, the tubing body 1 and the tubing coupling 2 are in matched threaded connection with the external thread 15 through the internal thread 14, a threaded connection mode is adopted, the structure is simple, the disassembly and the maintenance are convenient, the repeated use is realized, when the internal thread 14 is in rotary meshing with the external thread 15, the external sealing shoulder 7 is in interference fit with the internal sealing shoulder 8, the interference range is 0.05-0.15mm, the pipe body annulus 5 and the tubing coupling annulus 12 are both internally provided with a hydrogen absorbing agent, and the tops of the pipe body annulus 5 and the tubing, the pipe body annular space 5 and the tubing coupling annular space 12 are both vacuumized or back filled with inert gas, and heat loss is reduced to the maximum degree in three aspects of conduction, convection and radiation.
The utility model discloses the theory of operation: the utility model discloses a set up the tubing coupling annular space, be the thermal-insulated mode of vacuum with the design of tubing coupling, form the most genuine no "hot" thermal-insulated tubing string structure of nothing, improve the heat-proof quality of thermal-insulated tubing string, solve the quality hidden danger that coupling department vapor corrosion arouses, can popularize and apply viscous crude development and fields such as super deep well heat preservation lift simultaneously, cost reduction and efficiency to the viscous crude thermal recovery increase has the significance, set up the inside seal circular bead simultaneously, outside seal circular bead and sealing ring, after the installation, the inside seal circular bead, outside seal circular bead and sealing ring interference fit, effectively prevent that stratum water from getting into interior lining material and then arousing the inside lining collapse with the emergence that the coupling corrodes.
The above is the preferred embodiment of the present invention, and the technical personnel in the field of the present invention can also change and modify the above embodiment, therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or modification made by the technical personnel in the field on the basis of the present invention all belong to the protection scope of the present invention.
Claims (6)
1. The utility model provides a no heat point insulating tubing coupling heat-proof structure, includes tubing body (1) and tubing coupling (2), its characterized in that: the oil pipe body (1) comprises an oil pipe outer pipe (3) and an oil pipe inner pipe (4), the oil pipe inner pipe (4) is fixedly welded inside the oil pipe outer pipe (3), a pipe annular space (5) is arranged between the oil pipe outer pipe (3) and the oil pipe inner pipe (4), a pipe thermal insulation layer (6) is filled in the pipe annular space (5), the end part of the oil pipe body (1) is connected into the oil pipe coupling (2) in an embedded mode through threads, an outer sealing circular bead (7) is arranged at the end part of the oil pipe body (1), inner sealing circular beads (8) are arranged at the two ends of the oil pipe body (1), a sealing ring (9) is arranged at the inner end of the oil pipe body (1), the oil pipe coupling (2) comprises an oil pipe coupling outer pipe (10) and an oil pipe coupling inner pipe (11), and the oil pipe coupling inner pipe (11, an tubing coupling annular space (12) is arranged between the tubing coupling outer pipe (10) and the tubing coupling inner pipe (11), and a tubing coupling heat-insulating layer (13) is filled in the tubing coupling annular space (12).
2. The athermal insulated tubing collar insulation structure of claim 1, wherein: the pipe body thermal-insulation layer (6) and the tubing coupling thermal-insulation layer (13) are both aerogel, and the sealing ring (9) is made of modified polytetrafluoroethylene.
3. The athermal insulated tubing collar insulation structure of claim 2, wherein: the oil pipe coupling is characterized in that an internal thread is arranged at the end part of the oil pipe body (1), an external thread (15) is arranged at the end part of the oil pipe coupling (2), and the oil pipe body (1) and the oil pipe coupling (2) are in threaded connection through the internal thread (14) and the external thread (15).
4. The athermal insulated tubing collar insulation structure of claim 3, wherein: when the internal thread (14) is rotatably meshed with the external thread (15), the external sealing shoulder (7) is in interference fit with the internal sealing shoulder (8), and the interference magnitude is 0.05-0.15 mm.
5. The athermal insulated tubing collar insulation structure of claim 1, wherein: the pipe body annular space (5) and the tubing coupling annular space (12) are internally provided with hydrogen absorption agents, and the top of the pipe body annular space (5) and the top of the tubing coupling annular space (12) are provided with air extraction holes.
6. The athermal insulated tubing collar insulation structure of claim 1, wherein: and the pipe body annular space (5) and the tubing coupling annular space (12) are both vacuumized or refilled with inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920785635.5U CN210164435U (en) | 2019-05-29 | 2019-05-29 | Heat-point-free heat-insulation tubing coupling heat-insulation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920785635.5U CN210164435U (en) | 2019-05-29 | 2019-05-29 | Heat-point-free heat-insulation tubing coupling heat-insulation structure |
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| CN210164435U true CN210164435U (en) | 2020-03-20 |
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| CN201920785635.5U Active CN210164435U (en) | 2019-05-29 | 2019-05-29 | Heat-point-free heat-insulation tubing coupling heat-insulation structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575784A (en) * | 2022-03-14 | 2022-06-03 | 东北石油大学 | High-vacuum wall heat insulation pipe column and preparation method thereof |
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2019
- 2019-05-29 CN CN201920785635.5U patent/CN210164435U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575784A (en) * | 2022-03-14 | 2022-06-03 | 东北石油大学 | High-vacuum wall heat insulation pipe column and preparation method thereof |
| CN114575784B (en) * | 2022-03-14 | 2023-12-26 | 东北石油大学 | High-vacuum wall heat insulation pipe column and preparation method thereof |
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