CN104847281A - Direct connection type vacuum thermal-insulating oil pipe - Google Patents
Direct connection type vacuum thermal-insulating oil pipe Download PDFInfo
- Publication number
- CN104847281A CN104847281A CN201510275886.5A CN201510275886A CN104847281A CN 104847281 A CN104847281 A CN 104847281A CN 201510275886 A CN201510275886 A CN 201510275886A CN 104847281 A CN104847281 A CN 104847281A
- Authority
- CN
- China
- Prior art keywords
- pipe
- outer tube
- oil pipe
- type vacuum
- internal thread
- 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.)
- Pending
Links
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000010422 painting Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000010793 Steam injection (oil industry) Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- 238000010794 Cyclic Steam Stimulation Methods 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a direct connection type vacuum thermal-insulating oil pipe which comprises an outer pipe (1) and an inner pipe (3). An inner vacuum layer (2) is disposed between the outer pipe (1) and the inner pipe (3). One end of the outer pipe (1) is upset and provided with inner threads (4), and the other end thereof is provided with inner threads (5). The inner pipe (3) is welded into the outer pipe (1) and is slightly shorter than the outer pipe (1). The direct connection type vacuum thermal-insulating oil pipe has the advantages that the oil pipe is applicable to steam injection thermal recovery wells, extra procedures such as coupling machining are omitted due to the fact that one end of the outer pipe (1) is upset and directly provided with the inner threads, structure simplification is achieved, and cost is lowered; meanwhile, corrosion-resistant and wear-resistant coatings are sprayed on the inner wall of the inner pipe, the outer wall of the outer pipe, the inner threads, the outer threads and connections; the oil pipe is simple in structure, and good in thermal insulating effect, and the corrosion of the whole thermal-insulating oil pipe is lowered.
Description
Technical field
The present invention relates to petroleum industry thermal production well insulated tubing, particularly a kind of direct linkage type vacuum heat-insulation oil pipe, is applicable to heat extraction by steam injection well.
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.
In oil field operation, hydrogen sulfide, sulfate reducing bacteria, chemical flooding hydrodynamic, three is often had to exist without Korrosionsmediums such as combination flooding hydrodynamic, high temperature oxygen, carbon dioxide, chlorions in insulated tubing tubing string, conventional thermal barrier oil pipe does not have anticorrosive function, insulated tubing is under long-term work state, weld seam, inner tube wall, outer tube outer wall be being corroded property dielectric corrosion very easily, thus cause weld cracking, inner and outer pipes is corroded, insulated tubing loses function of heat insulation.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of direct linkage type vacuum heat-insulation oil pipe, to reduce the corrosion in whole insulated tubing tubing string, extends product application life, improves the effect that steam injection is recovered the oil.
For realizing object of the present invention, the invention provides a kind of direct linkage type vacuum heat-insulation oil pipe, comprise straight-joint type insulated tubing and comprise outer tube 1 and interior pipe 3, it is characterized in that, between described outer tube 1 and interior pipe 3, interior vacuum layer 2 is set, described vacuum layer 2 adopts and vacuumizes process, the thick aft-loaded airfoil internal thread 4 of described outer tube 1 one end pier, other end threading 5; Described interior pipe 3 inwall, outer tube 1 outer wall, internal thread 4, the equal anticorrosion with painting wear-resistant coating of external screw thread 5 and junction thereof.
Wherein, described internal thread 4 and external screw thread 5 are tapered screw thread, and tapering is 0.0625mm/mm-0.0125mm/mm.
Wherein, after the outer end diameter pier of described outer tube 1 one end slightly thickeies, external diameter is greater than other position external diameter of body herein, and machining internal thread 4 herein.
The present invention, compared with prior art, adopts without the heat insulation vacuum oil pipe of coupling straight-connecting, simplifies the structure, reduces cost, do not use box cupling, be directly connected to form tubing string with this direct linkage type vacuum heat-insulation oil pipe.Outer tube 1 one end external diameter pier of this insulated tubing slightly thickeies aft-loaded airfoil internal thread 4, other end threading 5, and by connecting in outer tube 1 two ends machining screw, the box cupling avoiding existing insulated tubing connects, and simplifies the structure, reduces cost; Pipe 3 inwall, outer tube 1 outer wall, internal thread 4, external screw thread 5 and junction anticorrosion with painting wear-resistant coating thereof simultaneously, thus have the function of the corrosion reduced in whole insulated tubing tubing string, extends product application life, improve the effect that steam injection is recovered the oil.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In figure, 1-outer tube, 2-vacuum layer, pipe in 3-, 4-internal thread, 5-external screw thread.
Detailed description of the invention
In order to make object of the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be understood to specific embodiment described herein only in order to explain the present invention, be not limited to protection scope of the present invention.
As shown in Figure 1, the invention provides a kind of direct linkage type vacuum heat-insulation oil pipe, comprise straight-joint type insulated tubing and comprise outer tube 1 and interior pipe 3, it is characterized in that, between described outer tube 1 and interior pipe 3, interior vacuum layer 2 is set, described vacuum layer 2 adopts and vacuumizes process, the thick aft-loaded airfoil internal thread 4 of described outer tube 1 one end pier, other end threading 5; Described interior pipe 3 inwall, outer tube 1 outer wall, internal thread 4, the equal anticorrosion with painting wear-resistant coating of external screw thread 5 and junction thereof.
It should be noted that, wherein, the coating product that described antiseptic wearable coat selects domestic and international state-of-the art abrasion resistance, anti-corrosive properties, resistance to elevated temperatures all good.
In a preferred embodiment, wherein, described internal thread 4 and external screw thread 5 are tapered screw thread, and tapering is 0.0625mm/mm-0.0125mm/mm.
Wherein, after the outer end diameter pier of described outer tube 1 one end slightly thickeies, external diameter is greater than other position external diameter of body herein, wherein, after the outer end diameter pier of described outer tube 1 one end slightly thickeies, external diameter is greater than other position external diameter of body herein, and external diameter difference is 12.7mm-19.05mm, and machining internal thread 4 herein, and machining internal thread 4 herein.
Wherein, described interior pipe 3 is welded on outer tube 1 inner length and is slightly less than outer tube 1.
The present invention, compared with prior art, adopts without the heat insulation vacuum oil pipe of coupling straight-connecting, simplifies the structure, reduces cost, do not use box cupling, be directly connected to form tubing string with this direct linkage type vacuum heat-insulation oil pipe.Outer tube 1 one end external diameter pier of this insulated tubing slightly thickeies aft-loaded airfoil internal thread 4, other end threading 5, and by connecting in outer tube 1 two ends machining screw, the box cupling avoiding existing insulated tubing connects, and simplifies the structure, reduces cost; Pipe 3 inwall, outer tube 1 outer wall, internal thread 4, external screw thread 5 and junction anticorrosion with painting wear-resistant coating thereof simultaneously, thus have the function of the corrosion reduced in whole insulated tubing tubing string, extends product application life, improve the effect that steam injection is recovered the oil.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a direct linkage type vacuum heat-insulation oil pipe, comprise straight-joint type insulated tubing and comprise outer tube (1) and interior pipe (3), it is characterized in that, interior vacuum layer (2) is set between described outer tube (1) and interior pipe (3), described vacuum layer (2) adopts and vacuumizes process, the thick aft-loaded airfoil internal thread (4) of described outer tube (1) one end pier, other end threading (5); Described interior pipe (3) inwall, outer tube (1) outer wall, internal thread (4), the equal anticorrosion with painting wear-resistant coating of external screw thread (5) and junction thereof.
2. direct linkage type vacuum heat-insulation oil pipe according to claim 1, is characterized in that, described internal thread (4) and external screw thread (5) are tapered screw thread, and tapering is 0.0625mm/mm-0.0125mm/mm.
3. direct linkage type vacuum heat-insulation oil pipe according to claim 1, is characterized in that, after the outer end diameter pier of described outer tube (1) one end slightly thickeies, external diameter is greater than other position external diameter of body herein, and machining internal thread (4) herein.
4. direct linkage type vacuum heat-insulation oil pipe according to claim 1, is characterized in that, described interior pipe (3) is welded on outer tube (1) inner length and is slightly less than outer tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510275886.5A CN104847281A (en) | 2015-05-27 | 2015-05-27 | Direct connection type vacuum thermal-insulating oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510275886.5A CN104847281A (en) | 2015-05-27 | 2015-05-27 | Direct connection type vacuum thermal-insulating oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104847281A true CN104847281A (en) | 2015-08-19 |
Family
ID=53847208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510275886.5A Pending CN104847281A (en) | 2015-05-27 | 2015-05-27 | Direct connection type vacuum thermal-insulating oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104847281A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100609A (en) * | 2017-06-16 | 2017-08-29 | 新疆国利衡清洁能源科技有限公司 | A kind of underground air outlet hole structure and its construction method |
| 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 |
| CN110762211A (en) * | 2019-11-22 | 2020-02-07 | 李国栋 | Oil well is with thermal-insulated heat preservation abrasionproof oil pipe pin end sealing device |
| CN113646503A (en) * | 2019-02-05 | 2021-11-12 | 杜康 - 贝克尔服务技术有限公司 | Pipe system for well operations |
-
2015
- 2015-05-27 CN CN201510275886.5A patent/CN104847281A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100609A (en) * | 2017-06-16 | 2017-08-29 | 新疆国利衡清洁能源科技有限公司 | A kind of underground air outlet hole structure and its construction method |
| 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 |
| CN113646503A (en) * | 2019-02-05 | 2021-11-12 | 杜康 - 贝克尔服务技术有限公司 | Pipe system for well operations |
| CN110762211A (en) * | 2019-11-22 | 2020-02-07 | 李国栋 | Oil well is with thermal-insulated heat preservation abrasionproof oil pipe pin end sealing device |
| CN110762211B (en) * | 2019-11-22 | 2024-06-11 | 李国栋 | Heat-insulating wear-proof oil pipe pin end sealing device for oil well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150819 |
|
| WD01 | Invention patent application deemed withdrawn after publication |