CN207988962U - A kind of direct linkage type vacuum heat-insulation oil pipe - Google Patents
A kind of direct linkage type vacuum heat-insulation oil pipe Download PDFInfo
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- CN207988962U CN207988962U CN201820383216.4U CN201820383216U CN207988962U CN 207988962 U CN207988962 U CN 207988962U CN 201820383216 U CN201820383216 U CN 201820383216U CN 207988962 U CN207988962 U CN 207988962U
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Abstract
The utility model provides a kind of direct linkage type vacuum heat-insulation oil pipe, belongs to petroleum drilling and mining field.The direct linkage type vacuum heat-insulation oil pipe includes the outer tube being coaxially set, inner tube；The upper end of the direct linkage type vacuum heat-insulation oil pipe is box end, is located in the central through hole of outer tube in the upper surface of box end, said inner tube, female thread is provided on the inner wall of outer tube, the female thread is located at the top of the upper surface of inner tube；The lower end of the direct linkage type vacuum heat-insulation oil pipe is pin end, is located at outside the central through hole of outer tube in the lower face of pin end, said inner tube, pin thread is provided on the outer wall of inner tube, the pin thread is located at the lower section of the lower face of outer tube.The utility model solves the problems, such as heat loss during thick oil thermal extraction steam injection, realizes heat and is applied to thick oil reservoir to greatest extent, and simple in structure, good heat-insulation effect, while reducing the corrosion of entire insulated tubing.
Description
Technical field
The utility model belongs to petroleum drilling and mining field, and in particular to a kind of direct linkage type vacuum heat-insulation oil pipe is suitable for viscous crude
Thermal production well.
Background technology
Heavy crude heat extraction is one of routine techniques of current heavy oil development and most widely used the Technology of Heavy Oil Recovery, and
It is most commonly used in heavy crude heat extraction, and dosage it is larger be exactly insulated tubing.After in high-temperature steam injection well, to prevent heat
It scatters and disappears, makes energy is as much as possible to enter viscous crude payzone, reduce the viscosity of viscous crude, improve heavy oil development effect, and avoid casing
Set damage is generated because temperature drastically increases, influences wellbore integrity, insulated tubing is best solution, utilizes insulated tubing
Low heat conductivity, can guarantee steam heat to greatest extent enter thick oil reservoir, ensure heavy crude heat extraction development effectiveness.
The Chinese patent of 102102492 A of Patent No. CN discloses a kind of straight-joint type insulated tubing and its processing technology,
Including outer tube and inner tube, inner insulating layer is set between outer tube and inner tube, and the outer end diameter at inner tube both ends is thicker than middle part outer diameter, interior
Pipe one end is equipped with internal thread, and the other end is equipped with external screw thread, and outer thermal insulation layer is set in the junction of inner tube.Its processing technology includes outer
Pipe processing, inner tube processing and inner and outer pipes assembly, inner tube processing in, by after the heating in medium frequency of inner tube both ends with upsetter to both ends outside
Circle jumping-up, then processes the external screw thread of the internal thread and the other end of inner tube one end；Although the patent can realize it is direct-connected, need by
Inner tube jumping-up increases processing technology complexity.
The Chinese patent of 102121353 A of Patent No. CN provides a kind of assembled heat-insulating oil pipe connection structure,
Including box cupling, outer tube factory end, outer tube user terminal, in factory's end cap pipe, user terminal casing group, tube body inner tube factory end and tube body
Pipe user terminal is by sealing docking structure connection, in pipe end inner tube and tube body inner tube factory end, outer tube factory end, box cupling, tube body
A closed pipe end heat-insulation chamber is formed between inner tube user terminal and outer tube user terminal, and collet is equipped in pipe end heat-insulation chamber,
Heat conduction, convection current and the radiation effects that box cupling junction can be reduced to a certain extent, reduce thermal loss herein, improve
Sealing performance herein, but since connecting component is more, processing technology is complicated, field application tedious process, reduces construction effect
The reliability of rate and insulated tubing.
The Chinese patent of 102071879 B of Patent No. CN is related to a kind of novel pre-stressed insulated tubing.It mainly solves existing
With the presence of insulated tubing vacuum degree decline and the problem of vacuum thermal insulation system destructible.It is characterized in that：The one of said inner tube
Be welded on outer tube after the flaring of end, the other end welds by adjusting weld-ring and outer tube after inner tube pre-stretched, inner tube with it is outer tubular
At ring cavity in have insulating sleeve；The insulating sleeve is made of at least 3 layers of steel cylinder, internal layer and the winding of middle layer steel cylinder outer wall
There are metal foil, the end welding of steel cylinder.The insulated tubing has the characteristics that vacuum degree is high, thermal insulation level is high, with long service life, but
Its processing technology is complicated.
Article " development of insulated tubing for steam drive process " proposes a kind of insulated tubing for steam drive process, uses prestressing force true
Empty heat-insulated double-layer structure, is mainly made of inner tube, outer tube, insulation bushing, bushing pipe and box cupling etc..Insulated tubing connection is using oval
Screw thread has good sealing and anti-galling performance.The insulated tubing has certain heat-insulating capability, but processing technology is complicated,
It cannot achieve direct-connected, and the convenience of onsite application and reliability are insufficient.
Article " heat preservation of inexpensive insulated tubing pit shaft is cold to adopt technological improvement research and application " development and Application insulated tubing
Box cupling muff realizes that the entirety of insulated tubing is heat-insulated using box cupling muff, and but its structure is complex, the reliability and peace used
Full property substantially reduces, and is unfavorable for field popularization application.
In conclusion current insulated tubing is mostly complicated, or is attached using box cupling, or by insulation oil pipe end
Portion is upset etc., on the one hand increases the difficulty of processing technology, is on the other hand unfavorable for the application at scene, existing to improve insulated tubing
The convenience and reliability of field application, improve the heat insulation of insulated tubing, it is necessary to it is simple, live to design a kind of processing technology
Easy to use, the reliable direct linkage type vacuum heat-insulation oil pipe of connection.
Utility model content
Utility model aims to solve above-mentioned problem existing in the prior art, provide a kind of direct linkage type vacuum every
Deep fat pipe overcomes existing heavy crude heat extraction insulated tubing processing technology complicated or cannot achieve direct-connected or add for direct-connected increase of realization
The problem of work process.
The utility model is achieved through the following technical solutions：
A kind of direct linkage type vacuum heat-insulation oil pipe, including be coaxially set outer tube, inner tube；
The upper end of the direct linkage type vacuum heat-insulation oil pipe is box end, and in box end, the upper surface of said inner tube is positioned at outer
In the central through hole of pipe, female thread is provided on the inner wall of outer tube, the female thread is located at the top of the upper surface of inner tube；
The lower end of the direct linkage type vacuum heat-insulation oil pipe is pin end, and in pin end, the lower face of said inner tube is positioned at outer
Outside the central through hole of pipe, pin thread is provided on the outer wall of inner tube, the pin thread is located at the lower section of the lower face of outer tube.
The upper surface of said inner tube and the inner wall of outer tube are welded to connect, welding ends in formation；
The lower face of the outer tube and the outer wall of inner tube are welded to connect, and form lower welding ends；
The upper welding ends, the outer wall of inner tube, the inner wall of outer tube, lower welding ends are enclosed vacuum heat-insulating layer.
It is provided with vacuum pumping hole in the lower end of the outer tube, the vacuum heat-insulating layer is connected to the external of outer tube.
It is placed with getter in the vacuum heat-insulating layer.
The internal thread of the female thread, the pin thread externally threaded shape be buttress thread, the angle of the flank of the two is equal
It it is 40 ° -60 °, tooth height is 5-10mm.
The upper welding ends, lower welding ends the angle of gradient be 30 ° -40 °.
Interior reaction torque shoulder is equipped between the tail portion of the internal thread and upper welding ends；
The interior reaction torque shoulder is located at the top of the upper surface of inner tube, and the tail portion connection of one end and internal thread is another
End is connect with upper welding ends；
Outer reaction torque shoulder is equipped between the externally threaded tail portion and lower welding ends；
The outer reaction torque shoulder is located at the lower section of the lower face of outer tube, and one end is connect with lower welding ends, the other end with
Externally threaded tail portion connection.
The angle [alpha] of the interior reaction torque shoulder is 17 °~17.5 °；
The angle beta of the outer reaction torque shoulder is 16.5 °~17.0 °.
Preferably, the thickness of the tube wall of the female thread is more than the thickness of the tube wall at the other positions of outer tube；
The thickness of the tube wall of the pin thread is more than the thickness of the tube wall at the other positions of inner tube.
Preferably, in the inner wall of said inner tube, the outer wall of outer tube, pin thread, female thread, interior reaction torque shoulder, outer reaction torque platform
It is coated with antiseptic wearable coat on the surface of shoulder.
Compared with prior art, the utility model has the beneficial effects that：
(1) it solves the problems, such as heat loss during thick oil thermal extraction steam injection, realizes heat and act on to greatest extent
To thick oil reservoir；
(2) it is complicated to solve existing insulated tubing processing technology, or cannot achieve direct-connected or increase processing and use process
The problem of；Reduce the processes such as additional processing box cupling, simplifies structure, reduces cost；It is simple in structure, good heat-insulation effect, together
When reduce the corrosion of entire insulated tubing；
(3) convenient, reliable and good heat-insulation effect the target during insulated tubing thermal production well use is realized.
Description of the drawings
Fig. 1 is straight-joint type insulated tubing sectional view；
Label and corresponding parts title in attached drawing：1- outer tubes, 2- inner tubes, 3- vacuum heat-insulating layers, 4- pin threads, 5- are female
The outer reaction torque shoulder of reaction torque shoulder, 10- in button, 6- internal threads, 7- external screw threads, 8- vacuum pumping holes, 9-.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1, the utility model direct linkage type vacuum heat-insulation oil pipe includes outer tube 1, inner tube 2, vacuum heat-insulating layer 3, public affairs
Button 4 and female thread 5, wherein insulated tubing one end regard outer tube as female thread, the other end using inner tube as pin thread, be not necessarily to it is upset can be real
It is existing direct-connected；The outer tube 1 of box end is longer than inner tube 2, and inner tube 2 is welded to the inner surface of outer tube 1, and grows part in outer tube 1 and process
Internal thread 6；The inner tube 2 of pin end is longer than outer tube 1, and outer tube 1 is welded in inner tube 2, and grows part threading in inner tube 2
7；Inner pipe portion and outer tube part that insulated tubing both ends are grown (i.e. pin thread, female thread at) can suitably thicken, and increase intensity
Simultaneously realize adaptation connection, the numberical range of thickening is related with pipe thickness and vacuum chamber size, also with specific oil pipe ruler
Very little related, if caliber is big, pipe thickness increases, and vacuum chamber moderately reduces.
Further, outer tube 1 and 2 intermediate lap of inner tube are vacuum heat-insulating layer 3, and vacuum pumping hole 8 is arranged in pin thread
On the outer tube 1 at end, being placed with getter in annular section, (dot in the vacuum heat-insulating layer 3 in Fig. 1 indicates air-breathing
Agent.), after vacuumizing, vacuum pumping hole 8 is sealed；
Further, the shape of internal thread 6 and external screw thread 7 is buttress thread, ranging from 40 ° -60 ° of angle of the flank, tooth height
For 5-10mm, the bonding strength of screw thread can be improved.
Further, pin end outer tube and the welding of inner tube and box end inner tube and outer tube (descend welding ends and upper weldering
Connect end) it is all made of gentle transition mode, the angle of gradient is 30 ° -40 °.
Further, internal thread tail portion is equipped with interior reaction torque shoulder 9, and male threaded end is equipped with outer reaction torque shoulder 10, interior
The angle [alpha] of screw thread reaction torque shoulder 9 is 17 °~17.5 °, and the angle beta of outer reaction torque shoulder 10 is 16.5 °~17.0 °.
Further, the outer wall of the inner wall, outer tube 1 of inner tube 2 and joint are (including internal thread, external screw thread, interior anti-twisted
Square shoulder, outer reaction torque shoulder) it is coated with antiseptic wearable coat.
The outer tube and diameter of inner pipe that the utility model includes using insulated tubing itself are poor, pass through at both ends and adjust inner and outer pipes
Length realize the direct-connected function of insulated tubing directly in outer tube wall machining internal thread, outer wall of inner tube threading,
And manufacturing procedure will not be increased, enormously simplify processing technology and onsite application process, it is simple for process, easy to use, safe and
Reliability greatly increases, and is particularly suitable for heavy crude heat extraction onsite application.To reduce the high temperature corrosion of insulated tubing, in outer tube outer wall and
Inner tube wall and threaded connection place are coated with anticorrosion antiwear layer, and reaction torque shoulder is arranged, and have both increased the leakproofness of connector,
The heat-proof quality of insulated tubing can be improved, which has broad application prospects.
Above-mentioned technical proposal is a kind of embodiment of the utility model, for those skilled in the art,
On the basis of the utility model discloses principle, it is easy to make various types of improvement or deformation, be not limited solely to this reality
The structure described in novel above-mentioned specific embodiment, thus it is previously described only preferred, and it is not restrictive
Meaning.
Claims (10)
1. a kind of direct linkage type vacuum heat-insulation oil pipe, it is characterised in that：The direct linkage type vacuum heat-insulation oil pipe includes being coaxially set
Outer tube, inner tube；
The upper end of the direct linkage type vacuum heat-insulation oil pipe is box end, is located at outer tube in the upper surface of box end, said inner tube
In central through hole, female thread is provided on the inner wall of outer tube, the female thread is located at the top of the upper surface of inner tube；
The lower end of the direct linkage type vacuum heat-insulation oil pipe is pin end, is located at outer tube in the lower face of pin end, said inner tube
Outside central through hole, pin thread is provided on the outer wall of inner tube, the pin thread is located at the lower section of the lower face of outer tube.
2. direct linkage type vacuum heat-insulation oil pipe according to claim 1, it is characterised in that：The upper surface of said inner tube and outer tube
Inner wall be welded to connect, welding ends in formation；
The lower face of the outer tube and the outer wall of inner tube are welded to connect, and form lower welding ends；
The upper welding ends, the outer wall of inner tube, the inner wall of outer tube, lower welding ends are enclosed vacuum heat-insulating layer.
3. direct linkage type vacuum heat-insulation oil pipe according to claim 2, it is characterised in that：It is provided with very in the lower end of the outer tube
The vacuum heat-insulating layer is connected to by empty aspirating hole with the external of outer tube.
4. direct linkage type vacuum heat-insulation oil pipe according to claim 3, it is characterised in that：It is placed in the vacuum heat-insulating layer
There is getter.
5. direct linkage type vacuum heat-insulation oil pipe according to claim 1, it is characterised in that：It is the internal thread of the female thread, described
The externally threaded shape of pin thread is buttress thread, and the angle of the flank of the two is 40 ° -60 °, and tooth height is 5-10mm.
6. direct linkage type vacuum heat-insulation oil pipe according to claim 2, it is characterised in that：The upper welding ends, lower welding ends
The angle of gradient be 30 ° -40 °.
7. direct linkage type vacuum heat-insulation oil pipe according to claim 5, it is characterised in that：The tail portion of the internal thread with it is upper
Interior reaction torque shoulder is equipped between welding ends；
The interior reaction torque shoulder is located at the top of the upper surface of inner tube, and the tail portion of one end and internal thread connects, the other end with
Upper welding ends connection；
Outer reaction torque shoulder is equipped between the externally threaded tail portion and lower welding ends；
The outer reaction torque shoulder is located at the lower section of the lower face of outer tube, and one end is connect with lower welding ends, the other end and outer spiral shell
The tail portion of line connects.
8. direct linkage type vacuum heat-insulation oil pipe according to claim 7, it is characterised in that：The angle of the interior reaction torque shoulder
α is 17 °~17.5 °；
The angle beta of the outer reaction torque shoulder is 16.5 °~17.0 °.
9. direct linkage type vacuum heat-insulation oil pipe according to claim 1, it is characterised in that：The thickness of the tube wall of the female thread is big
In the thickness of the tube wall at the other positions of outer tube；
The thickness of the tube wall of the pin thread is more than the thickness of the tube wall at the other positions of inner tube.
10. direct linkage type vacuum heat-insulation oil pipe according to claim 7 or 8, it is characterised in that：Said inner tube inner wall,
The outer wall of outer tube, pin thread, female thread, interior reaction torque shoulder, outer reaction torque shoulder surface on be coated with antiseptic wearable coat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820383216.4U CN207988962U (en) | 2018-03-21 | 2018-03-21 | A kind of direct linkage type vacuum heat-insulation oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820383216.4U CN207988962U (en) | 2018-03-21 | 2018-03-21 | A kind of direct linkage type vacuum heat-insulation oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207988962U true CN207988962U (en) | 2018-10-19 |
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ID=63828531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820383216.4U Active CN207988962U (en) | 2018-03-21 | 2018-03-21 | A kind of direct linkage type vacuum heat-insulation oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207988962U (en) |
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2018
- 2018-03-21 CN CN201820383216.4U patent/CN207988962U/en active Active
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