CN209129543U - Antisepsis oil pipe and its unit - Google Patents
Antisepsis oil pipe and its unit Download PDFInfo
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- CN209129543U CN209129543U CN201821958166.4U CN201821958166U CN209129543U CN 209129543 U CN209129543 U CN 209129543U CN 201821958166 U CN201821958166 U CN 201821958166U CN 209129543 U CN209129543 U CN 209129543U
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- pipeline section
- oil pipe
- antisepsis oil
- pipeline
- screw thread
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Abstract
The utility model provides a kind of antisepsis oil pipe and its unit, the antisepsis oil pipe includes: multiple antisepsis oil pipe units being sequentially connected in series, the antisepsis oil pipe unit includes: first pipeline section and two the second pipeline sections, the length of first pipeline section is greater than the length of second pipeline section, the antiseptic property of second pipeline section is better than the antiseptic property of first pipeline section, two second pipeline sections are respectively fixedly connected with by friction welding (FW) at the both ends of first pipeline section, erosion resistant coating is formed on the inner and outer wall of first pipeline section, second pipeline section is provided with external screw thread far from the end outer wall of first pipeline section；Tubing coupling, the inner wall of the tubing coupling are provided with internal screw thread compatible with the external screw thread, and the internal screw thread mutually screws the connection to realize the adjacent antisepsis oil pipe unit with the external screw thread.The utility model embodiment can be with the repaired mouth of the realization antisepsis oil pipe of reliable performance.
Description
Technical field
The utility model relates to joint coating on pipeline technical field more particularly to a kind of antisepsis oil pipes and its unit.
Background technique
The description of this part only provides and discloses relevant background information to the utility model, without constituting the prior art.
With rapid development of economy, China is continuously increased the demand of petroleum.The drilling development rate in oil field is more next
Faster, certain oil fields step into the middle and later periods of exploitation, High water cut, H2S、CO2Equal corrosive mediums are cured oil-gas pipeline corrosion problem
Come more serious.It is such to solve the problems, such as, develop liner oil pipe, thermo-chemical treatment antisepsis oil pipe (such as nitriding oil successively both at home and abroad
Pipe, aluminising oil pipe), this kind of antisepsis oil pipe ontology is effectively handled, good anti-corrosion effect is played, but because of repaired mouth
Problem is never well solved, the serious development for restricting antisepsis oil pipe.
Therefore, how reliable performance and fast and easy realize the repaired mouth of antisepsis oil pipe, are a technical problem to be solved urgently.
It should be noted that the above description of the technical background is intended merely to conveniently carry out clearly the technical solution of the utility model
Chu, complete explanation, and facilitate the understanding of those skilled in the art and illustrate.It cannot be merely because these schemes be practical at this
Novel background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Utility model content
Based on prior art defect above-mentioned, the utility model embodiment provides a kind of antisepsis oil pipe and its unit,
It can be with the repaired mouth of the realization antisepsis oil pipe of reliable performance.
To achieve the goals above, the utility model provides the following technical solution.
A kind of antisepsis oil pipe unit, comprising: first pipeline section and two the second pipeline sections, the length of first pipeline section are big
In the length of second pipeline section, the antiseptic property of second pipeline section is better than the antiseptic property of first pipeline section, two institutes
The second pipeline section is stated to be respectively fixedly connected with by friction welding (FW) in the both ends of first pipeline section, the inner and outer wall of first pipeline section
On be formed with erosion resistant coating, second pipeline section is provided with external screw thread far from the end outer wall of first pipeline section.
Preferably, the material of first pipeline section is N80Q grade of steel, and the material of second pipeline section is L80-13Cr.
Preferably, the erosion resistant coating is to concatenate the tubing string to be formed to first pipeline section and second pipeline section to carry out aluminising
Or Nitrizing Treatment is formed.
Preferably, the erosion resistant coating includes being formed in the aluminum layer of first pipeline section outer surface and being formed in the fine aluminium
Ferroalloy parts outside layer；Wherein,
The aluminum layer can form dense oxide aluminium film under corrosive medium, to completely cutting off corrosive medium described first
Except the substrate of pipeline section；
The ferroalloy parts generate spinel structure Al after the aluminum layer runs out of in oxidation process2FeO4
Compound, the spinel structure Al2FeO4Compound can prevent in the atom of corrosive medium and the substrate of first pipeline section
Iron atom contact.
A kind of antisepsis oil pipe, comprising:
Multiple antisepsis oil pipe units as described in any of the above-described；
Multiple tubing couplings, the inner wall of the tubing coupling is provided with internal screw thread compatible with the external screw thread, described
Internal screw thread mutually screws the connection to realize the adjacent antisepsis oil pipe unit with the external screw thread.
Preferably, the material of the tubing coupling is identical as the material of second pipeline section.
The antisepsis oil pipe and its unit of the utility model embodiment, by choosing that length is longer but antiseptic property is weaker the
Main body of one pipeline section as antisepsis oil pipe and its unit chooses that length is shorter but antiseptic property preferable second to reduce cost
End of the pipeline section as antisepsis oil pipe unit, and the first weaker pipeline section of welding performance and the second pipe are realized by using friction welding (FW)
The docking of section, and concatenate the tubing string to be formed to the first pipeline section and the second pipeline section and carry out thermo-chemical treatment, thus at least in the first pipe
Erosion resistant coating is formed on the inner and outer wall of section.In this way, subsequent the second pipeline section outer wall processing as antisepsis oil pipe unit end
External screw thread, due to the first pipeline section outer wall erosion resistant coating and be not affected by destruction, and the second pipeline section is preferable since its own property has
Antiseptic property, thus obtained antisepsis oil pipe unit, and, the antisepsis oil pipe obtained using the antisepsis oil pipe unit spliced,
It can guarantee with excellent antiseptic property.
It was verified that the antisepsis oil pipe and its unit of the utility model embodiment are compared with prior art, there is following benefit
Effect:
(1) existing thermo-chemical treatment antisepsis oil pipe does not do repaired mouth processing, and oil pipe end is caused to become seriously corroded position.
End of the utility model by setting preferable second pipeline section of antiseptic property as antisepsis oil pipe unit, and by chemical heat
Reason at least forms erosion resistant coating in the inner and outer wall of the first weaker pipeline section of antiseptic property, to efficiently solve oil pipe port
The problem of anti-corrosion；
(2) connecting welding performance weaker the first pipeline section and the second pipeline section by the way of friction welding (FW) realizes 100% connection
Intensity guarantees the intensity requirement of the antisepsis oil pipe and its unit that finally obtain；
(3) in the second pipeline section outer wall turning standard thread, do not change field operation mode, guarantee the coherent of operation mode
Property.
Referring to following description and accompanying drawings, the specific embodiment of the utility model is disclosed in detail, it is practical new to specify this
The principle of type can be in a manner of adopted.It should be understood that the embodiments of the present invention are not so limited in range.
In the range of the spirit and terms of appended claims, the embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in other embodiments, is combined with the feature in other embodiments, or the feature in substitution other embodiments.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
Attached drawing described here is only used for task of explanation, and is not intended to limit in any way disclosed by the utility model
Range.In addition, shape and proportional sizes of each component in figure etc. are only schematically, to be used to help the reason to the utility model
Solution is not the specific shape and proportional sizes for limiting each component of the utility model.Those skilled in the art is practical new at this
Under the introduction of type, various possible shapes and proportional sizes can be selected to implement the utility model as the case may be.Attached
In figure:
Fig. 1 is the flow chart of the field joints coating technology method of the antisepsis oil pipe of the utility model embodiment；
Fig. 2 is the structural schematic diagram of the antisepsis oil pipe unit of the utility model embodiment；
Fig. 3 is the antisepsis oil pipe unit of the utility model embodiment and the assembling structure schematic diagram of tubing coupling.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution in the utility model, below in conjunction with this reality
With the attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that
The described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Based on the utility model
In embodiment, those of ordinary skill in the art's every other implementation obtained without making creative work
The range of the utility model protection all should belong in example.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein "and/or" includes
Any and all combinations of one or more related listed items.
Fig. 1 provides the flow chart of a kind of field joints coating technology method of antisepsis oil pipe for the utility model embodiment.Although this
Utility model provides the method operating procedure as described in following embodiments or flow chart, but based on routine or without wound
The labour for the property made may include more or less operating procedure in the method.In addition, the method is in logicality
In the step of there is no necessary causalities, the execution sequence of these steps is not limited to hold provided in the application embodiment
Row sequence.The field joints coating technology method includes the following steps:
Step S10: obtaining first pipeline section and two the second pipeline sections, and the length of first pipeline section is greater than described second
The length of pipeline section, the antiseptic property of second pipeline section are better than the antiseptic property of first pipeline section；
Step S20: it is respectively fixedly connected with two second pipeline sections at the both ends of first pipeline section using friction welding (FW)；
Step S30: the tubing string to be formed is concatenated to first pipeline section and second pipeline section and carries out thermo-chemical treatment, at least
Make to form erosion resistant coating on the inner and outer wall of first pipeline section；
Step S40: two second pipeline sections are processed to form external screw thread far from the end outer wall of first pipeline section；Extremely
This, one mutually concatenated, first pipeline section and two second pipeline sections form an antisepsis oil pipe unit；
Step S50: repeating the above steps, and obtains multiple antisepsis oil pipe units；
Step S60: multiple antisepsis oil pipe units are concatenated using tubing coupling, obtain the antisepsis oil pipe；Wherein, institute
The material for stating tubing coupling is identical as the material of second pipeline section, and the inwall processing of the tubing coupling is formed and the outer spiral shell
The compatible internal screw thread of line, the internal screw thread mutually screw the company to realize the adjacent antisepsis oil pipe unit with the external screw thread
It connects.
In step slo, the first pipeline section constitutes the main body of antisepsis oil pipe unit or antisepsis oil pipe, therefore its length is configured
It is longer.Specifically, the length of the first pipeline section is 7000-10000mm, the length of the second pipeline section is 150-300mm.Meanwhile out
In reduce cost the considerations of, antiseptic property is weaker than the antiseptic property of the second pipeline section.Based on the above two o'clock, the material of the first pipeline section
It is selected as N80Q grade of steel, the material of the second pipeline section is selected as L80-13Cr.
In general, the unit price of the second pipeline section made of L80-13Cr material, is the unit price of the first pipeline section made of N80Q grade of steel
10 times, and the service life of the second pipeline section made of L80-13Cr material, it is the first pipeline section service life made of N80Q grade of steel
5-6 times.It can be seen that there is great cost advantage using the first pipeline section made of N80Q grade of steel, but it is using the longevity
The disadvantage for ordering aspect is also very obvious.
In view of this, carrying out thermo-chemical treatment to the first pipeline section made of N80Q grade of steel, make its outer surface (inner wall and
Outer wall) form erosion resistant coating.It was verified that the first pipeline section makes made of N80Q grade of steel after the thermo-chemical treatment for passing through step S30
It can reach the service life quite even equal with the second pipeline section made of L80-13Cr material with the service life, but cost is still much low
Cost (only about the 1/ of the unit price of the second pipeline section made of L80-13Cr material of the second pipeline section made of L80-13Cr material
3).To take into account cost and use using antisepsis oil pipe and its unit made from the technical solution of the utility model embodiment
The requirement of service life these two aspects, economic value is significant, conducive to the popularization and application of large area.
Further, the welding of N80Q grade of steel and L80-13Cr material is poor, using traditional welding technique, it is difficult to guarantee
Scheduled weld strength.In view of this, the utility model embodiment uses this special welding technique of friction welding (FW) to realize
The docking of first pipeline section and the second pipeline section.
In the present embodiment, the tool at two the second pipeline sections fixed both ends for being docked at the first pipeline section respectively is made using friction welding (FW)
Body step is that the first pipeline section is clamped in mobile fixture, and the second pipeline section is clamped in rolling clamp.First pipeline section and second
After pipeline section is clamped, the mobile fixture on slide unit is moved together with slide unit, to carry the first pipeline section towards rotation
Fixture or the second pipeline section are mobile.After being moved to certain distance, rolling clamp drives the second pipeline section to start with the revolving speed of 0.6~6m/s
Rotation starts the heat production that rubs after being moved to the end of the first pipeline section and the end contact of the second pipeline section when mobile fixture.
After friction is after the first scheduled duration, alternatively, rolling clamp stops rotation after friction shortening amount reaches setting value
Turn.The forging force of 20~200MPa is applied to the first pipeline section and/or the second pipeline section and maintains the second scheduled duration, the rotating clamp
Tool, which unclamps, discharges second pipeline section, and the slide unit is retreated to home position, and the mobile fixture unclamps release first pipe
Section.
Wherein, the first scheduled duration, the second scheduled duration, setting value and third scheduled duration mentioned below are with practical feelings
Depending on condition, the utility model embodiment is not construed as limiting this.Since welding performance of the friction welding (FW) to welded workpiece requires more
The advantages that wide in range, and weld size precision possessed by friction welding (FW) is high, weldquality is good, compact structure, high bond strength, make it
It is suitble to produce in enormous quantities.After the welding of second pipeline section made of the first pipeline section and L80-13Cr material made of N80Q grade of steel
Intensity experiment report judgement learn, in the intensity of the first pipeline section and the end weld of the second pipeline section, even more than N80Q grade of steel
The intensity of manufactured first pipeline section meets requirement of the actual condition to oil pipe intensity.
It continues from the preceding paragraph description, since the antiseptic property of the second pipeline section is better than the antiseptic property of the first pipeline section, to first
Pipeline section and the second pipeline section concatenate the tubing string to be formed and carry out thermo-chemical treatment, and main purpose is to provide for the anti-corrosive properties of the first pipeline section
Energy.Certainly, thermo-chemical treatment is being carried out, while forming erosion resistant coating on the inner and outer wall of the first pipeline section, in the second pipeline section
Inner and outer wall equally also will form erosion resistant coating.
In the present embodiment, the tubing string to be formed is concatenated to the first pipeline section and the second pipeline section and carries out thermo-chemical treatment, specially
The tubing string to be formed is concatenated to the first pipeline section and the second pipeline section and carries out aluminising or Nitrizing Treatment, to form erosion resistant coating.Specific behaviour
It is that the first pipeline section and the second pipeline section are concatenated to the tubing string to be formed merging containing the infiltration for penetrating into element (preferably nitrogen or aluminium) as step
In agent, 500~650 DEG C will be heated to containing the penetration enhancer for penetrating into element, after keeping third scheduled duration, take out the first pipeline section and the
Two pipeline sections concatenate the tubing string to be formed, then by the first pipeline section and the second pipeline section concatenate in the water that the tubing string to be formed is placed in room temperature into
Row quenching.After above-mentioned processing, the first pipeline section and the second pipeline section are " quenching+tempering " tissue.
In a preferred embodiment, erosion resistant coating is aluminized coating.Specifically, the erosion resistant coating includes being formed in the first pipeline section
The aluminum layer of outer surface and the ferroalloy parts being formed in outside aluminum layer.Wherein, aluminum layer can form densification under corrosive medium
Pellumina, so that corrosive medium isolation is reached etch-proof effect except the substrate of first pipeline section.Also, it is pure
Aluminium layer has autoxidation repair ability, it is ensured that the integrality of pellumina.
After aluminum layer runs out of, ferroalloy parts produce spinel structure Al in oxidation process2FeO4Chemical combination
Object, spinel structure Al2FeO4Compound stacking density is big, no vacancy zero defect.It can not only prevent to aoxidize, and can also prevent
The atom of corrosive medium is contacted with the iron atom in the substrate of the first pipeline section, not will form corrosion product, to reach corrosion-resistant
Purpose.
Since the antiseptic property of the second pipeline section is better than the antiseptic property of the first pipeline section, then passing through turnery processing in its outer wall
When forming external screw thread, even by the anti-corrosion damage layer on the second pipeline section outer wall, the antiseptic property of the second pipeline section is not influenced still.
This is also the utility model embodiment using the preferable second pipeline section reason for it of antiseptic property.If using normal
The technology of rule, the oil pipe poor to antiseptic property directly adopt thermo-chemical treatment and carry out anti-corrosion.So, the carry out preservative treatment
Oil pipe is subsequent in threading, and the erosion resistant coating of outer wall will be destroyed, and is deteriorated so as to cause the antiseptic property that its port goes out.
And the utility model embodiment uses preferable second pipeline section of antiseptic property, then two the second pipeline sections pass through friction
After weldering is fixedly connected on the both ends of the first pipeline section after preservative treatment, two ends of antisepsis oil pipe unit can be formed.This
Sample, even if the subsequent outer wall in two the second pipeline sections is processed to form external screw thread, but not due to the erosion resistant coating of the first pipeline section outer wall
Destroyed, and the second pipeline section due to its own property have preferable antiseptic property, thus obtained antisepsis oil pipe unit, with
And the antisepsis oil pipe obtained using the antisepsis oil pipe unit spliced, it can guarantee with excellent antiseptic property.
Further, it docks since antisepsis oil pipe unit needs to realize by tubing coupling to form antisepsis oil pipe, and it is oily
Pipe box cupling needs to be connected by screw thread with the second pipeline section.Therefore, the inner wall of tubing coupling is also needed to process and is formed with and second
The compatible internal screw thread of the external screw thread of pipeline section outer wall.
It is similarly in corrosion-resistant requirement, in order to not lose antiseptic property, oil pipe when tubing coupling processes to form internal screw thread
Box cupling uses material identical with the second pipeline section, i.e., and by L80-13Cr is made.To which tubing coupling itself has preferable
Antiseptic property, even if in this way, machining internal thread destroys its inner wall of end, but still its antiseptic property is not influenced.
The utility model embodiment additionally provides a kind of antisepsis oil pipe and its list manufactured using above-mentioned field joints coating technology method
Member.As shown in Figures 2 and 3, which includes: first pipeline section 1 and two the second pipeline sections 2, the first pipeline section 1
Length be greater than the length of the second pipeline section 2, the antiseptic property of the second pipeline section 2 is better than the antiseptic property of the first pipeline section 1, two second
Pipeline section 2 be respectively fixedly connected with by friction welding (FW) be formed on the both ends of the first pipeline section 1, the inner and outer wall of the first pipeline section 1 it is anti-
Rotten layer (not shown), the second pipeline section 2 are provided with external screw thread (not shown) far from the end outer wall of the first pipeline section 1.
In the present embodiment, it is formed with friction welding (FW) weld bond 3 between the end that two the second pipeline sections 2 are docked with the first pipeline section 1,
Second pipeline section 2 is docked by the friction welding (FW) weld bond 3 with the realization of the first pipeline section 1.
In the present embodiment, the material of the first pipeline section 1 is N80Q grade of steel, and the material of the second pipeline section 2 is L80-13Cr.Anti-corrosion
Layer carries out aluminising for the tubing string formed to the first pipeline section 1 and second pipeline section 2 concatenation or Nitrizing Treatment is formed.Preferably at one
In ground embodiment, erosion resistant coating is aluminized coating comprising is formed in the aluminum layer of 1 outer surface of the first pipeline section and is formed in outside aluminum layer
Ferroalloy parts.
As shown in Figures 2 and 3, the antisepsis oil pipe of the utility model embodiment includes: multiple as described in above-described embodiment
Antisepsis oil pipe unit 10；Multiple tubing couplings, the inner wall of tubing coupling are provided with internal screw thread compatible with external screw thread, internal screw thread
The connection to realize adjacent antisepsis oil pipe unit 10 is mutually screwed with external screw thread.Preferably, the material of tubing coupling and the second pipeline section 2
Material it is identical.
Wherein, related content involved in the antisepsis oil pipe and its unit of the present embodiment, can refer to above for repaired mouth work
The description of process, as space is limited, therefore not to repeat here for the utility model.
The antisepsis oil pipe and its unit of the utility model embodiment, by choosing that length is longer but antiseptic property is weaker the
Main body of one pipeline section 1 as antisepsis oil pipe and its unit chooses that length is shorter but antiseptic property preferable second to reduce cost
End of the pipeline section 2 as antisepsis oil pipe unit 10, and weaker the first pipeline section 1 of welding performance and the are realized by using friction welding (FW)
The docking of two pipeline sections 2, and the tubing string formed to the first pipeline section 1 and the second pipeline section 2 concatenation carries out thermo-chemical treatment, at least exist
Erosion resistant coating is formed on the inner and outer wall of first pipeline section 1.In this way, subsequent the second pipeline section as 10 end of antisepsis oil pipe unit
2 outer wall threadings, due to 1 outer wall of the first pipeline section erosion resistant coating and be not affected by destruction, and the second pipeline section 2 is due to its own property
Matter have preferable antiseptic property, thus obtained antisepsis oil pipe unit 10, and, spliced using the antisepsis oil pipe unit 10
The antisepsis oil pipe arrived can guarantee with excellent antiseptic property.
It was verified that the antisepsis oil pipe and its unit of the utility model embodiment are compared with prior art, there is following benefit
Effect:
(1) existing thermo-chemical treatment antisepsis oil pipe does not do repaired mouth processing, and oil pipe end is caused to become seriously corroded position.
End of the utility model by setting preferable second pipeline section 2 of antiseptic property as antisepsis oil pipe unit 10, and pass through chemistry
Heat treatment at least forms erosion resistant coating in the inner and outer wall of the first weaker pipeline section 1 of antiseptic property, to efficiently solve oil
The problem of pipe port anti-corrosion；
(2) connecting welding performance weaker the first pipeline section 1 and the second pipeline section 2 by the way of friction welding (FW) realizes that 100% connects
Intensity is connect, guarantees the intensity requirement of the antisepsis oil pipe and its unit that finally obtain；
(3) in 2 outer wall turning standard thread of the second pipeline section, do not change field operation mode, guarantee the coherent of operation mode
Property.
It should be noted that in the description of the present invention, term " first ", " second " etc. be used for description purposes only and
Similar object is distinguished, between the two and sequencing is not present, indication or suggestion relative importance can not be interpreted as.This
Outside, in the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.
Herein cited any digital value all include between lower limit value to upper limit value with the lower value of an incremented and
The all values of upper value, there are the intervals of at least two units between any lower value and any much higher value.For example, such as
Fruit elaborates that the quantity an of component or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 21
To 80, more preferably from 30 to 70, then purpose is arrived in order to illustrate also clearly listing such as 15 to 85,22 in the specification
68,43 to 51,30 to 32 is equivalent.For the value less than 1, suitably think that a unit is 0.0001,0.001,0.01,0.1.
These are only intended to the example clearly expressed, it is believed that all possibility for the numerical value enumerated between minimum and peak
Combination is all expressly set forth in the specification in a similar manner.
Unless otherwise indicated, all ranges all include all numbers between endpoint and endpoint.It is used together with range
" about " or " approximation " be suitable for two endpoints of the range.Thus, " about 20 to 30 " are intended to cover that " about 20 to about
30 ", including at least the endpoint indicated.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except provided example all will be apparent for a person skilled in the art
's.Therefore, the range of this introduction should not be determined referring to foregoing description, but should referring to preceding claims and these
The full scope of the equivalent that claim is possessed determines.For comprehensive purpose, all articles and with reference to including patent
The disclosure of application and bulletin is all by reference to being incorporated herein.Appointing for theme disclosed herein is omitted in preceding claims
Where face is not intended to abandon the body matter, also should not be considered as applicant and the theme is not thought of as to disclosed reality
With a part of novel theme.
Claims (6)
1. a kind of antisepsis oil pipe unit characterized by comprising first pipeline section and two the second pipeline sections, first pipe
The length of section is greater than the length of second pipeline section, and the antiseptic property of second pipeline section is better than the anti-corrosive properties of first pipeline section
Can, two second pipeline sections are respectively fixedly connected with by friction welding (FW) at the both ends of first pipeline section, first pipeline section
Erosion resistant coating is formed on inner and outer wall, second pipeline section is provided with external screw thread far from the end outer wall of first pipeline section.
2. antisepsis oil pipe unit as described in claim 1, which is characterized in that the material of first pipeline section is N80Q grade of steel,
The material of second pipeline section is L80-13Cr.
3. antisepsis oil pipe unit as described in claim 1, which is characterized in that the erosion resistant coating is to first pipeline section and institute
It states the second pipeline section and concatenates that the tubing string to be formed carries out aluminising or Nitrizing Treatment is formed.
4. antisepsis oil pipe unit as described in claim 1, which is characterized in that the erosion resistant coating includes being formed in first pipe
The aluminum layer of section outer surface and the ferroalloy parts being formed in outside the aluminum layer；Wherein,
The aluminum layer can form dense oxide aluminium film under corrosive medium, to completely cutting off corrosive medium in first pipeline section
Substrate except；
The ferroalloy parts generate spinel structure Al after the aluminum layer runs out of in oxidation process2FeO4Chemical combination
Object, the spinel structure Al2FeO4Compound can prevent the iron in the atom of corrosive medium and the substrate of first pipeline section former
Son contact.
5. a kind of antisepsis oil pipe characterized by comprising
Multiple antisepsis oil pipe units as described in Claims 1-4 any one；
Multiple tubing couplings, the inner wall of the tubing coupling are provided with internal screw thread compatible with the external screw thread, the interior spiral shell
Line mutually screws the connection to realize the adjacent antisepsis oil pipe unit with the external screw thread.
6. antisepsis oil pipe as claimed in claim 5, which is characterized in that the material of the tubing coupling and second pipeline section
Material is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821958166.4U CN209129543U (en) | 2018-11-26 | 2018-11-26 | Antisepsis oil pipe and its unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821958166.4U CN209129543U (en) | 2018-11-26 | 2018-11-26 | Antisepsis oil pipe and its unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209129543U true CN209129543U (en) | 2019-07-19 |
Family
ID=67246869
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821958166.4U Active CN209129543U (en) | 2018-11-26 | 2018-11-26 | Antisepsis oil pipe and its unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209129543U (en) |
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2018
- 2018-11-26 CN CN201821958166.4U patent/CN209129543U/en active Active
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