CN203978312U - Heat insulation box cupling - Google Patents
Heat insulation box cupling Download PDFInfo
- Publication number
- CN203978312U CN203978312U CN201420371744.XU CN201420371744U CN203978312U CN 203978312 U CN203978312 U CN 203978312U CN 201420371744 U CN201420371744 U CN 201420371744U CN 203978312 U CN203978312 U CN 203978312U
- Authority
- CN
- China
- Prior art keywords
- box cupling
- outer tube
- positioning sleeve
- heat
- heat insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 36
- 230000002745 absorbent Effects 0.000 claims abstract description 5
- 239000002250 absorbent Substances 0.000 claims abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 9
- 238000000605 extraction Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Packages (AREA)
Abstract
The utility model relates to a kind of heat insulation box cupling, belongs to heavy crude heat extraction down-hole field of tool, comprises box cupling body, positioning sleeve, box cupling outer tube, and the two ends of described box cupling body are provided with tapering internal thread; The outer surface cover of box cupling body has box cupling outer tube, between box cupling body and box cupling outer tube, is mounted with positioning sleeve, and positioning sleeve is positioned over the two ends of box cupling body; External surface, the inner surface of box cupling outer tube and the medial surface of positioning sleeve of box cupling body have formed an airtight annular space, are filled with insulation layer in annular space, and insulation layer external surface is placed with oxygen absorbent; On described box cupling outer tube, be provided with and vacuumize aperture.The utility model reduces the heat waste of box cupling from thermal convection current, heat radiation and three aspects of heat conduction, heat-proof quality is good, simple in structure.
Description
Technical field
The utility model relates to a kind of Petroleum Down-hole Tool parts, relates in particular to a kind of heat insulation box cupling, belongs to heavy crude heat extraction down-hole field of tool.
Background technology
Insulated tubing is generally used for heavy crude thermal recovery steamed well; the loss of heat when it can effectively reduce steam injection, prevents that heat from passing to sleeve pipe and cementing concrete ring, with not Yin Gaowen and damaged of protective casing and cement sheath; guarantee the mass dryness fraction of steam at the bottom of Injection Well simultaneously, improve heat injection effect.The supporting box cupling of insulated tubing that thick oil thermal extraction uses at present, do not there is heat insulating function, while causing the normal steam injection of thermal production well, there is very large heat waste in box cupling place, reduce to a certain extent the heat-proof quality of insulated tubing entirety, correlation theory research shows that the apparent heat conductivity at box cupling place is 90 to 180 times of B level instlated tubular, in whole heat-proof string, the heat dissipation capacity maximum at box cupling place, therefore at same depth of stratum, there is maximum value in the casing wall thermal stress of box cupling near zone and the thermal stress of cement sheath, oil well is after too much round is handled up, or after long-term hot fluid drives, sleeve pipe is in unsafe condition herein.
Along with the development of marine thermal recovery technology, sleeve pipe and cementing quality to thermal production well are had higher requirement safely, therefore, in order further to improve the integral heat-insulation property of heat injection tubing string, heat waste while reducing heat injection, increases the enthalpy that injects oil reservoir, urgently develops a kind of novel heat insulation box cupling.
Utility model content
The risk facing greatly because of box cupling place heat waste in order further to improve integral heat-insulation property, reduction sleeve pipe and the cement sheath of heat-proof string, it is a kind of simple in structure that the utility model provides, possess the heat insulation box cupling of good heat-proof quality, can effectively reduce the heat waste at box cupling place.
For solving its technical problem, the technical scheme that the utility model adopts is as follows:
A kind of heat insulation box cupling, comprises box cupling body, positioning sleeve, box cupling outer tube, and the two ends of described box cupling body are provided with tapering internal thread; The outer surface cover of box cupling body has box cupling outer tube, between box cupling body and box cupling outer tube, is mounted with positioning sleeve, and positioning sleeve is positioned over the two ends of box cupling body; External surface, the inner surface of box cupling outer tube and the medial surface of positioning sleeve of box cupling body have formed an airtight annular space, are filled with insulation layer in annular space, and insulation layer external surface is placed with oxygen absorbent; On described box cupling outer tube, be provided with and vacuumize aperture.
Further, described insulation layer is columnar composite heat-insulating layer.Particularly, described insulation layer is composite heat-insulating layer, and its thickness is 2.5～6mm.
Further, described positioning sleeve arranged outside has leg-of-mutton weld seam, and described weld seam is by box cupling body, box cupling outer tube and positioning sleeve fixing seal.Particularly, described weld seam and box cupling body and box cupling outer tube shape chamfering at 45 °.
Further, the quantity of described positioning sleeve is 2.
Further, the length of described positioning sleeve is 5～10mm.
Further, the length of described box cupling body is greater than the length of box cupling outer tube, and length difference is 15～40mm.
Heat insulation mechanism of the present utility model is: by the aperture vacuumizing, described airtight annular space is become to vacuum layer, to reduce the heat waste of thermal convection current mode; By at the external surface of box cupling body, certain thickness composite heat-insulating layer being installed, to reduce the heat waste of heat radiation mode; Box cupling body is connected with box cupling outer tube with weld seam by positioning sleeve, has reduced the heat waste of heat exchange pattern, therefore the utility model reduces heat waste by the compound action of these three kinds of heat transfer types.
Beneficial effect: the utility model can effectively improve the heat-proof quality of heat-proof string, eliminates sleeve pipe impaired risk under high temperature for a long time, further improves the thermal recovery effect of marine thermal production well.
Brief description of the drawings
Fig. 1 is the half sectional view of the heat insulation box cupling of the utility model.
In figure, 1-box cupling body; 2-positioning sleeve; 3-box cupling outer tube; 4-weld seam; 5-insulation layer; 6-oxygen absorbent; 7-annular space; 8-vacuumizes aperture; 101-tapering internal thread.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the heat insulation box cupling of one of the present utility model, comprise box cupling body 1, positioning sleeve 2, box cupling outer tube 3, box cupling body 1 is tubular, the two ends of box cupling body 1 are provided with tapering internal thread 101, can be connected with insulated tubing or other downhole tools by the heat insulation box cupling of this internal thread 101, the outer surface cover of box cupling body 1 has box cupling outer tube 3, between box cupling body 1 and box cupling outer tube 3, be mounted with positioning sleeve 2, positioning sleeve 2 is positioned over the two ends of box cupling body 1, the quantity of positioning sleeve 2 is 2, and length is 5～10mm.The medial surface of the external surface of box cupling body 1, the inner surface of box cupling outer tube 3 and positioning sleeve 2 has formed an airtight annular space 7, is filled with insulation layer 5 in annular space 7, and insulation layer 5 external surfaces are placed with oxygen absorbent 6; On described box cupling outer tube 3, be provided with and vacuumize aperture 8, described annular space 7 becomes vacuum layer by the aperture 8 that vacuumizes being placed on box cupling outer tube 3, vacuumizes aperture 8 and seals by spot welding.Insulation layer 5 is columnar composite heat-insulating layer 5, is preferably designed for aluminium foil and adds glass fibre cotton, and thickness is 2.5～6mm.Positioning sleeve 2 arranged outside have leg-of-mutton weld seam 4, and described weld seam 4 is by box cupling body 1, box cupling outer tube 3 and positioning sleeve 2 fixing seals.After weld seam 4 has welded, polish flat, with box cupling body 1 and box cupling outer tube 3 shape chamfering at 45 °, facilitate the connection of tubing string and be lowered to.The length of box cupling body 1 is greater than the length of box cupling outer tube 3, and length difference is 15～40mm.
Claims (8)
1. a heat insulation box cupling, comprises box cupling body (1), positioning sleeve (2), box cupling outer tube (3), it is characterized in that: the two ends of described box cupling body (1) are provided with tapering internal thread (101); The outer surface cover of box cupling body (1) has box cupling outer tube (3), between box cupling body (1) and box cupling outer tube (3), be mounted with positioning sleeve (2), positioning sleeve (2) is positioned over the two ends of box cupling body (1); The medial surface of the external surface of box cupling body (1), the inner surface of box cupling outer tube (3) and positioning sleeve (2) has formed an airtight annular space (7), in annular space (7), be filled with insulation layer (5), insulation layer (5) external surface is placed with oxygen absorbent (6); On described box cupling outer tube (3), be provided with and vacuumize aperture (8).
2. heat insulation box cupling according to claim 1, is characterized in that: described insulation layer (5) is columnar insulation layer (5).
3. heat insulation box cupling according to claim 2, is characterized in that: the thickness of described insulation layer (5) is 2.5～6mm.
4. heat insulation box cupling according to claim 1, it is characterized in that: described positioning sleeve (2) arranged outside has leg-of-mutton weld seam (4), described weld seam (4) is by box cupling body (1), box cupling outer tube (3) and positioning sleeve (2) fixing seal.
5. heat insulation box cupling according to claim 4, is characterized in that: described weld seam (4) and box cupling body (1) and box cupling outer tube (3) shape chamfering at 45 °.
6. heat insulation box cupling according to claim 1, is characterized in that: the quantity of described positioning sleeve (2) is 2.
7. heat insulation box cupling according to claim 1, is characterized in that: the length of described positioning sleeve (2) is 5～10mm.
8. heat insulation box cupling according to claim 1, is characterized in that: the length of described box cupling body (1) is greater than the length of box cupling outer tube (3), and length difference is 15～40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420371744.XU CN203978312U (en) | 2014-07-07 | 2014-07-07 | Heat insulation box cupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420371744.XU CN203978312U (en) | 2014-07-07 | 2014-07-07 | Heat insulation box cupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203978312U true CN203978312U (en) | 2014-12-03 |
Family
ID=51975771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420371744.XU Expired - Lifetime CN203978312U (en) | 2014-07-07 | 2014-07-07 | Heat insulation box cupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203978312U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437547A (en) * | 2016-11-28 | 2017-02-22 | 无锡金顶石油管材配件制造有限公司 | Oil pipe coupling |
| CN108661570A (en) * | 2018-06-07 | 2018-10-16 | 盘锦辽河油田金环实业有限责任公司 | A kind of ocean insulated tubing |
| CN113374420A (en) * | 2020-02-25 | 2021-09-10 | 中国石油天然气股份有限公司 | Sleeve pipe |
| CN113374423A (en) * | 2020-02-25 | 2021-09-10 | 中国石油天然气股份有限公司 | Coupling and casing with coupling |
-
2014
- 2014-07-07 CN CN201420371744.XU patent/CN203978312U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437547A (en) * | 2016-11-28 | 2017-02-22 | 无锡金顶石油管材配件制造有限公司 | Oil pipe coupling |
| CN108661570A (en) * | 2018-06-07 | 2018-10-16 | 盘锦辽河油田金环实业有限责任公司 | A kind of ocean insulated tubing |
| CN113374420A (en) * | 2020-02-25 | 2021-09-10 | 中国石油天然气股份有限公司 | Sleeve pipe |
| CN113374423A (en) * | 2020-02-25 | 2021-09-10 | 中国石油天然气股份有限公司 | Coupling and casing with coupling |
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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 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CHINA OILFIELD SERVICES Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CHINA OILFIELD SERVICES Ltd. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141203 |