CN204782808U - Directly link type heat insulation oil pipe - Google Patents
Directly link type heat insulation oil pipe Download PDFInfo
- Publication number
- CN204782808U CN204782808U CN201520348544.7U CN201520348544U CN204782808U CN 204782808 U CN204782808 U CN 204782808U CN 201520348544 U CN201520348544 U CN 201520348544U CN 204782808 U CN204782808 U CN 204782808U
- Authority
- CN
- China
- Prior art keywords
- outer tube
- straight
- interior pipe
- insulated tubing
- junction
- 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 - Fee Related
Links
- 238000009413 insulation Methods 0.000 title abstract description 4
- 230000007704 transition Effects 0.000 claims abstract description 13
- 238000002955 isolation Methods 0.000 claims description 7
- 238000003754 machining Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract 2
- 239000012774 insulation material Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010794 Cyclic Steam Stimulation Methods 0.000 description 1
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Thermal Insulation (AREA)
Abstract
The utility model discloses a directly link type heat insulation oil pipe, including outer tube (1), inner tube (5), set up between outer tube (1) and inner tube (5) interior insulating layer (4), be equipped with thermal insulation material in insulating layer (4) and set upright or straight ring (3), set up radiation shield casing (2) in the junction of inner tube (5), outer tube (1) one end mound thick post -treatment internal thread (6), other end processing external screw thread (8), the utility model discloses reduce processes such as extra processing coupling, simplified structure, the cost is reduced. Because of also making the distributing of stress of junction more even in the mild transition mode of transition district's adoption, can bear bigger tension load simultaneously, junction in inner tube (5) does not change because of being equipped with the diameter that radiation shield casing (2) made the hole, forms the turbulent flow when having avoided the steam injection in here, has reduced the flow resistance, the tool's of being convenient for lower income, still has simultaneously simple structure, practicality advantage such as strong, thermal -insulated effectual.
Description
Technical field
The utility model relates to petroleum industry thermal production well insulated tubing technical field, particularly a kind of straight-joint type insulated tubing.
Background technology
China's heavy oil resources is widely distributed, and viscous crude occupies suitable proportion in China's oil output, and each oil-field thick-oil output also improves year by year.Viscous crude is mainly exploited by the method for heating exploitation, and cyclic steam stimulation, steam driving exploitation and SAGD can be divided into exploit.By temperatures involved, the cover damage phenomenon of thermal production well is very serious.Current most domestic heavy crude heat extraction oil field uses insulated tubing.Insulated tubing is made up of inside and outside two-layer pipe, and outer tube is connected with interior pipe by welding, is filled with insulated gas between inner and outer pipes, and ensure that the heat of vapours not easily scatters and disappears, coupling type screw thread processed by traditional insulated tubing on outer tube, by box cupling, insulated tubing connected.The connecting portion of box cupling belongs to weak link in the insulated tubing tubing string of thermal production well, and in using at the scene, therefore position goes wrong and the accident that causes is of common occurrence.In use also find that the instlated tubular of band box cupling is also undesirable in effect of heat insulation.These problems are all field of heavy oil thermal recovery problems urgently to be resolved hurrily.
Summary of the invention
The purpose of this utility model is just to provide a kind of straight-joint type insulated tubing, to solve the technical problem that insulated tubing vapor flow resistance is large, junction heat-proof quality is poor, junction tensile strength is low of processing in prior art.
In order to solve the problems of the technologies described above, the utility model provides a kind of straight-joint type insulated tubing, comprise outer tube 1 and interior pipe 5, described interior pipe 5 is welded on the inside of described outer tube 1, between described outer tube 1 and described interior pipe 5, be provided with isolation layer 4, it is characterized in that, the outer end diameter pier of described outer tube 1 one end slightly thickeies, and being provided with internal thread 6, collet 2, the gentle transition conical surface 7, described outer tube 1 other end is provided with external screw thread 8.
Wherein, after the outer end diameter pier of described outer tube 1 one end slightly thickeies, external diameter is greater than the external diameter at described other position of outer tube 1 body herein, and machining internal thread 6 herein.
Wherein, described collet 2 is cylindrical body, and its internal diameter conforms to the internal diameter of described interior pipe 5.
Wherein, described interior pipe 5 is longer than by described outer tube 1.
Wherein, the described gentle transition conical surface 7 angle [alpha] is between 5 °-35 °.
Wherein, described isolation layer 4 is built with heat-barrier material and centering ring 3.
The utility model, compared with prior art, in outer tube 1 one end, external diameter pier slightly thickeies aft-loaded airfoil internal thread 6, other end threading 8, by connecting in outer tube 1 two ends machining screw, the box cupling avoiding existing insulated tubing connects, simplify the structure, reduce cost; Meanwhile, because wall thickness increases herein, its tensile strength also improves thereupon; In the junction of interior pipe 5, the diameter of endoporus does not change, the turbulent flow formed because of the diameter change of endoporus when avoiding steam injection, thus decreases flow resistance, also improves the heat-proof quality of junction simultaneously; Outer tube 1 Dun Cu district afterbody adopts gentle transition design, reduces stress concentration point, improves connection effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure, 1-outer tube, 2-collet, 3-centering ring, 4-isolation layer, pipe 6-internal thread in 5-, the 7-gentle transition conical surface, 8-external screw thread, the angle of α-gentle transition conical surface.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment, the utility model is further elaborated.Should be understood to specific embodiment described herein only in order to explain the utility model, be not limited to protection domain of the present utility model.
As shown in Figure 1, the utility model provides a kind of straight-joint type insulated tubing, comprise outer tube 1 and interior pipe 5, described interior pipe 5 is welded on the inside of described outer tube 1, isolation layer 4 is provided with between described outer tube 1 and described interior pipe 5, the outer end diameter pier of described outer tube 1 one end slightly thickeies, and is provided with internal thread 6, collet 2, the gentle transition conical surface 7, and described outer tube 1 other end is provided with external screw thread 8.
It should be noted that, the utility model improves from product structure, to reduce the flow resistance of steam, the heat-proof quality improving junction and tensile strength, improve the effect that steam injection is recovered the oil, be applicable to heat extraction by steam injection well, by directly machining internal thread and external screw thread on outer tube, reduce cost; Because of adopt in transition region the gentle transition conical surface make junction stress distribution evenly, larger tensile load can be born; Internal thread 6 of the present utility model and external screw thread 8 connecting thread adopt inclined acme thread; Do not use box cupling, be directly connected to form tubing string with this straight-joint type insulated tubing.
Wherein, after the outer end diameter pier of described outer tube 1 one end slightly thickeies, external diameter is greater than the external diameter at described other position of outer tube 1 body herein, and machining internal thread 6 herein.
Wherein, described collet 2 is cylindrical body, and its internal diameter conforms to the internal diameter of described interior pipe 5.
Wherein, described interior pipe 5 is longer than by described outer tube 1.
Wherein, the described gentle transition conical surface 7 angle [alpha] is between 5 °-35 °.
Wherein, described isolation layer 4 is built with heat-barrier material and centering ring 3.
The utility model is direct machining internal thread after outer tube 1 one side end pier is thick, decreases the operations such as additional processing box cupling, simplifies the structure, reduces cost.In the junction of interior pipe 5, because being provided with collet 2, the diameter of endoporus not being changed, forming turbulent flow herein when avoiding steam injection, decreasing flow resistance, entering under being convenient to power tool.The advantages such as it is simple that the utility model has structure, practical, good heat-insulation effect.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (6)
1. a straight-joint type insulated tubing, it is characterized in that, comprise outer tube (1) and interior pipe (5), described interior pipe (5) is welded on the inside of described outer tube (1), isolation layer (4) is provided with between described outer tube (1) and described interior pipe (5), it is characterized in that, the outer end diameter pier of described outer tube (1) one end slightly thickeies, and being provided with internal thread (6), collet (2), the gentle transition conical surface (7), described outer tube (1) other end is provided with external screw thread (8).
2. straight-joint type insulated tubing according to claim 1, it is characterized in that, after the outer end diameter pier of described outer tube (1) one end slightly thickeies, external diameter is greater than the external diameter at described outer tube (1) other position of body herein, and machining internal thread (6) herein.
3. straight-joint type insulated tubing according to claim 1, is characterized in that, described collet (2) is cylindrical body, and its internal diameter conforms to the internal diameter of described interior pipe (5).
4. straight-joint type insulated tubing according to claim 1, is characterized in that, described interior pipe (5) is longer than by described outer tube (1).
5. straight-joint type insulated tubing according to claim 1, is characterized in that, the described gentle transition conical surface (7) angle [alpha] is between 5 °-35 °.
6. straight-joint type insulated tubing according to claim 1, is characterized in that, described isolation layer (4) is built with heat-barrier material and centering ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520348544.7U CN204782808U (en) | 2015-05-27 | 2015-05-27 | Directly link type heat insulation oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520348544.7U CN204782808U (en) | 2015-05-27 | 2015-05-27 | Directly link type heat insulation oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204782808U true CN204782808U (en) | 2015-11-18 |
Family
ID=54522877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520348544.7U Expired - Fee Related CN204782808U (en) | 2015-05-27 | 2015-05-27 | Directly link type heat insulation oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204782808U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014269A (en) * | 2016-04-25 | 2016-10-12 | 曹俊杰 | Heat insulation wear-resisting oil tube used for oil well |
-
2015
- 2015-05-27 CN CN201520348544.7U patent/CN204782808U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014269A (en) * | 2016-04-25 | 2016-10-12 | 曹俊杰 | Heat insulation wear-resisting oil tube used for oil well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 |