JPS62101996A - Heat-insulating double pipe having excellent hydrogen intrusion-resisting property - Google Patents
Heat-insulating double pipe having excellent hydrogen intrusion-resisting propertyInfo
- Publication number
- JPS62101996A JPS62101996A JP60240422A JP24042285A JPS62101996A JP S62101996 A JPS62101996 A JP S62101996A JP 60240422 A JP60240422 A JP 60240422A JP 24042285 A JP24042285 A JP 24042285A JP S62101996 A JPS62101996 A JP S62101996A
- Authority
- JP
- Japan
- Prior art keywords
- double pipe
- pipe
- heat
- less
- excellent hydrogen
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Thermal Insulation (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、重質油またはタールサンド油の採取あるいは
軽質油の３次回収などに用いられるスチームインジェク
ションパイプをはじめとする耐水素侵入性に優れた断熱
二重管に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to hydrogen intrusion resistance, including steam injection pipes used for the extraction of heavy oil or tar sand oil or the tertiary recovery of light oil. It is about excellent insulating double pipes.
（従来の技術）
原油掘削コストの高騰にともなって、高深度の井戸とと
もに重質油やタールサンド油の開発あるいはウォータイ
ンジェクション・ＣＯ２インジェクション・スチームイ
ンジェクションによる原油の２次、３次回収が軽済的に
採算が合うようになってきた。とくに、重質油やタール
サンドの開発、あるいは軽質油の３次回収などにはスチ
ームインジェクションが採油効率の良い有効な手段であ
る。(Conventional technology) With the rise in crude oil drilling costs, it has become more economical to develop deep wells as well as heavy oil and tar sand oil, or to use water injection, CO2 injection, and steam injection for secondary and tertiary recovery of crude oil. It has become profitable. In particular, steam injection is an effective means with high oil extraction efficiency for the development of heavy oil and tar sands, or the tertiary recovery of light oil.
このスチームインジェクションパイプとして内管と外管
の間に真空の空間を有する断熱二重管は、通常の管より
も２０〜３０倍熱損失が少なく、スチームの単位量当り
の油回収率が向上する。しかしながら、サワー等の腐食
性環境下でこの断熱二重管を使用すると、腐食によって
管の内・外面より鋼中に水素が侵入して二重管の真空度
が低下し、断熱効率が減少するために油回収率が低下す
る。As a steam injection pipe, this insulated double pipe with a vacuum space between the inner and outer pipes has 20 to 30 times less heat loss than normal pipes and improves the oil recovery rate per unit amount of steam. . However, when this insulated double pipe is used in corrosive environments such as sour water, hydrogen enters the steel from the inner and outer surfaces of the pipe due to corrosion, reducing the vacuum level of the double pipe and reducing insulation efficiency. Therefore, the oil recovery rate decreases.
このために、鋼中に侵入する水素間を減少させる合金元
素を鋼中に添加した低合金鋼により断熱効率の優れた二
重管にすることが考えられる。To this end, it is conceivable to make a double-walled pipe with excellent heat insulation efficiency by using low-alloy steel with alloying elements added to the steel to reduce the amount of hydrogen penetrating into the steel.
また、断熱二重管の耐食性を向上させるために、１３Ｃ
ｒ系ステンレス、オーステナイト系ステンレスあるいは
２相ステンレスで二重管を構成することも考えられる。In addition, in order to improve the corrosion resistance of the insulated double pipe, 13C
It is also conceivable to configure the double pipe with R-series stainless steel, austenitic stainless steel, or two-phase stainless steel.
（発明が解決しようとする問題点）
しかし、前者の合金元素を添加する場合は、初期の腐食
による水素の侵入のために二重管内部の真空度が若干低
下し、断熱性が十分ではない。(Problem to be solved by the invention) However, when the former alloying element is added, the degree of vacuum inside the double pipe decreases slightly due to the intrusion of hydrogen due to initial corrosion, resulting in insufficient insulation. .
また、後者の場合は、環境中の硫化水素の影響により硫
化物応力腐食割れが発生する問題があった。Furthermore, in the latter case, there was a problem in that sulfide stress corrosion cracking occurred due to the influence of hydrogen sulfide in the environment.
本発明の目的は、スチームインジェクション用二重管を
はじめとする断熱二重管の断熱効率低下の原因となる水
素の鋼中への侵入を防止できる断熱二重管を提供するこ
とにある。An object of the present invention is to provide a heat-insulating double pipe that can prevent hydrogen from penetrating into the steel, which causes a decrease in the insulation efficiency of the heat-insulating double pipe, including a double pipe for steam injection.
（問題点を解決するための手段）
本発明は、鋼中に侵入した水素が二重管の断熱層に一侵
入することを防止するーために、直接環境に接しない断
熱二重管の外管および／または内管の断熱層側に０．１
〜５＋ｎ＋ｎのオーステナイト系ステンレス鋼を内張り
することを特徴とするものである。(Means for Solving the Problems) The present invention aims to prevent hydrogen that has entered the steel from entering the heat insulating layer of the double pipe. 0.1 on the insulation layer side of the pipe and/or inner pipe
It is characterized by being lined with ~5+n+n austenitic stainless steel.
また、断熱二重管の外管および内管の材料は、Ｃをｏ、
５ｗｔ％以下、３ｉを０．０１０〜０，５０ｗｔ％。In addition, the materials for the outer and inner tubes of the insulated double pipe include C, o,
5 wt% or less, 3i 0.010 to 0.50 wt%.
Ｍｎを０．２０〜２．０ｗｔ％、Ｐをｏ、 ０３０ｗｔ
％以下。Mn: 0.20-2.0wt%, P: o, 030wt
%below.
Ｓを０．０３ｗｔ％以下とし、これに強度の確保あるい
は耐水素侵入性向上を目的として５ｗｔ％以下のＣｒ、
２ｗｔ％以下のＭｏ 、 ０，１ｗｔ％以下のＮｂ。S is set to 0.03 wt% or less, and 5 wt% or less of Cr is added for the purpose of ensuring strength or improving hydrogen penetration resistance.
Mo of 2 wt% or less, Nb of 0.1 wt% or less.
０、１５ｗｔ％以下のＶ、 ０．１ｗｔ％以下のＴｉ
。0.15 wt% or less V, 0.1 wt% or less Ti
.
０、Ｏ０５ｗｊ％以下の３，１ｗｔ％以下のＣｕ、１ｗ
ｔ％以下のＮｉを必要に応じて添加した鋼とすることが
望ましい。0, O05wj% or less 3, 1wt% or less Cu, 1w
It is desirable to use steel with Ni added in an amount of t% or less as necessary.
さらに、本発明の断熱二重管ＷＪ造の一例は、第１図に
図示するように管端が閉じられて内外管の間は真空状態
にされており、この管はジヨイントを使用して継げるよ
うになっている。Furthermore, in an example of the insulated double pipe WJ construction of the present invention, the pipe ends are closed to create a vacuum state between the inner and outer pipes, as shown in FIG. It has become so.
（作 用）
本発明で使用されるオーステナイト系ステンレス鋼の厚
みを０．１〜５ｍｍの範囲にしたのは、オーステナイト
系ステンレス鋼の厚みが０．１ｍｍ未満では水素透過の
阻止効果が乏しく、５ｍｍを超えても水素透過の阻止効
果が向−ヒせずコスト的にも不利となるからである。こ
の理由は、後述する実施例からも窺える。(Function) The reason why the thickness of the austenitic stainless steel used in the present invention is set to be in the range of 0.1 to 5 mm is that if the thickness of the austenitic stainless steel is less than 0.1 mm, the hydrogen permeation blocking effect is poor. This is because even if it exceeds the hydrogen permeation prevention effect, the hydrogen permeation prevention effect will not be improved and it will be disadvantageous in terms of cost. The reason for this can be seen from the examples described later.
また、外管および内管の鋼の組成範囲を前述した範囲を
好適とした理由は、次のとおりである。Further, the reason why the above-mentioned range of composition of the steel of the outer tube and the inner tube is preferable is as follows.
Ｃ：強度を増大させる元素であるが、０．５０ｗｔ％を
超えると靭性が低下する。C: An element that increases strength, but if it exceeds 0.50 wt%, toughness decreases.
Ｓｉ ：脱酸上必要な元素であるが、０．０１ｗｔ％未
満では脱酸の効果がなく、０．５ｗｔ％を超えると靭性
が劣化する。Si: An element necessary for deoxidation, but if it is less than 0.01 wt%, it has no deoxidizing effect, and if it exceeds 0.5 wt%, the toughness deteriorates.
Ｍｎ：強度を増大させる元素であり、０．２ｗｔ％未満
では必要な強度を確保できず、２．０ｗｔ％を超すと靭
性を損う。Mn: An element that increases strength. If it is less than 0.2 wt%, the necessary strength cannot be secured, and if it exceeds 2.0 wt%, toughness is impaired.
Ｐ ： ０．０３ｗｔ％を超える添加は熱間加工性・
靭性を劣化させる。P: Addition of more than 0.03wt% will affect hot workability.
Degrades toughness.
Ｓ：熱間加工性・靭性を劣化させる元素であり、０．０
３ｗｔ％を超えるとこれらの性質を著しく阻害するから
である。S: An element that deteriorates hot workability and toughness, 0.0
This is because if it exceeds 3 wt%, these properties will be significantly impaired.
また、断熱二重管の外管および／または内管に内張すす
るステンレ、ス鋼は、オーステナイト系ス、テンレス鋼
であれば本発明の効果が発揮できるので、とくにその成
分を定める必要はない。Furthermore, since the effects of the present invention can be achieved as long as the stainless steel or steel used to line the outer and/or inner pipe of the insulated double pipe is austenitic steel or stainless steel, it is not necessary to specify its composition in particular. do not have.
（実施例）
第２図に図示するように、断熱二重管の外管２と内９！
１３に５ＵＳ３０４あルイハ５Ｕｓ３１６ヲ内張すして
、外管と内管との空間を真空にした後、５％Ｎａ Ｃ１
＋ ０．５％ＣＨ３ＣＯ０Ｈ水溶液に１ａｔｌのＨ２Ｓ
を通じた液に該断熱二重管を５００時間浸漬し、外管を
内管との空間の圧力の上昇を調査した。この際、外管お
よび内情の組成と５ＵＳ３０４および５ＬＩＳ３１６の
組成は第１表に示すもので、５ＵＳ３０４の場合厚さを
各々０．０５ｍｍ 、 ０．１ｍｍ、 ０．５ｍｍ
、 １ｍ１ｍ、 ３ｍｍ 、 ５ｍｍ 、 ７ｍｍとし
、５ＵＳ３１６の場合厚さを０，５ｎ＋ｍにした各断熱
二重管を作成して実験に供した。また、外管と内管との
空間の初期の圧力を２０ｔＯｒｒにした。(Example) As shown in Fig. 2, the outer pipe 2 and inner pipe 9 of the insulated double pipe!
13 was lined with 5US304 and 5US316, and the space between the outer tube and the inner tube was evacuated, and then 5% Na C1 was added.
+ 1 atl H2S in 0.5% CH3CO0H aqueous solution
The insulated double tube was immersed in the liquid that had passed through the tube for 500 hours, and the increase in pressure in the space between the outer tube and the inner tube was investigated. At this time, the composition of the outer tube and inner part and the composition of 5US304 and 5LIS316 are shown in Table 1, and in the case of 5US304, the thickness is 0.05 mm, 0.1 mm, and 0.5 mm, respectively.
, 1ml, 1m, 3mm, 5mm, and 7mm, and in the case of 5US316, the thickness was 0.5n+m. Insulated double pipes were prepared and used for experiments. Further, the initial pressure in the space between the outer tube and the inner tube was set to 20 tOrr.
この結果は第３図に示すように、オーステナイト系ステ
ンレス鋼の厚みが０．１ｍｍ以下では圧力の上昇が著し
く、５００時間経過した後は５０ｔＯｒｒを超えたが、
その厚みが０．１１ｎＩＩ１以上の厚さの場合は５００
時間経過後でも３０ｔＯｒｒ以下であった。また、その
厚みが５ｍｍを超えても殆んど圧力の変化はなかった。As shown in Figure 3, this result shows that when the thickness of the austenitic stainless steel is 0.1 mm or less, the pressure increases significantly, and after 500 hours, it exceeds 50 tOrr.
500 if the thickness is 0.11nII1 or more
Even after the lapse of time, it remained below 30 tOrr. Further, even when the thickness exceeded 5 mm, there was almost no change in pressure.
第１表 断熱二重管の内、外管および内張り材料の組成
（発明の効果）
以上説明したように本発明の断熱二重管によれば、断熱
性が優れているのでスチーム注入の際の温度低下が妨げ
、原油の三次回収に役立つとともに従来は回収できなか
った深層に存在する原油も回収できる。Table 1 Compositions of the inner and outer pipes and lining material of the insulated double pipe (effects of the invention) As explained above, the insulated double pipe of the present invention has excellent heat insulation properties, so it This is hindered by the drop in temperature, making it useful for tertiary recovery of crude oil, as well as allowing the recovery of crude oil that exists in deep layers that could not be recovered conventionally.
また、本発明の断熱二重管は腐食環境下で流体の温度低
下を防止しつつ流体を輸送する用途にも使用できる。Further, the insulated double pipe of the present invention can also be used for transporting fluid while preventing the temperature of the fluid from decreasing in a corrosive environment.
第１図は本発明の断熱二重管のジヨイント部を示す図、
第２図は、本発明の断熱二重管の圧力変化を実験する装
置を示す図、
第３図はオーステナイト系ステンレスの板厚と内・外管
間の圧力変化との関係を示す図である。 。
１・・・断熱二重管 ２・・・外管３・・・内管
４・・・断熱層５・・・真空ポンプ ６
・・・圧力計７・・・カップリングFig. 1 is a diagram showing the joint part of the insulated double pipe of the present invention, Fig. 2 is a diagram showing an apparatus for testing pressure changes in the insulated double pipe of the present invention, and Fig. 3 is a plate of austenitic stainless steel. FIG. 3 is a diagram showing the relationship between thickness and pressure change between the inner and outer tubes. . 1...Insulated double pipe 2...Outer pipe 3...Inner pipe
4...Insulating layer 5...Vacuum pump 6
...Pressure gauge 7...Coupling
Claims (1)
管において、該外管および／または内管の断熱層側に厚
さ０．１〜５ｍｍのオーステナイト系ステンレス鋼を内
張りすることを特徴とする耐水素侵入性に優れた断熱二
重管。1. In an insulated double pipe with a vacuum insulation layer between the outer tube and the inner tube, the outer tube and/or the inner tube are lined with austenitic stainless steel with a thickness of 0.1 to 5 mm on the insulation layer side. A double insulated pipe with excellent hydrogen intrusion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60240422A JPS62101996A (en) | 1985-10-29 | 1985-10-29 | Heat-insulating double pipe having excellent hydrogen intrusion-resisting property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60240422A JPS62101996A (en) | 1985-10-29 | 1985-10-29 | Heat-insulating double pipe having excellent hydrogen intrusion-resisting property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62101996A true JPS62101996A (en) | 1987-05-12 |
Family
ID=17059239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60240422A Pending JPS62101996A (en) | 1985-10-29 | 1985-10-29 | Heat-insulating double pipe having excellent hydrogen intrusion-resisting property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62101996A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016180467A (en) * | 2015-03-24 | 2016-10-13 | イハラサイエンス株式会社 | Double pipe structure and joint thereof |
-
1985
- 1985-10-29 JP JP60240422A patent/JPS62101996A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016180467A (en) * | 2015-03-24 | 2016-10-13 | イハラサイエンス株式会社 | Double pipe structure and joint thereof |
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