JPS62230955A - Steel for excavating drill pipe excellent in corrosion resistance - Google Patents
Steel for excavating drill pipe excellent in corrosion resistanceInfo
- Publication number
- JPS62230955A JPS62230955A JP7375986A JP7375986A JPS62230955A JP S62230955 A JPS62230955 A JP S62230955A JP 7375986 A JP7375986 A JP 7375986A JP 7375986 A JP7375986 A JP 7375986A JP S62230955 A JPS62230955 A JP S62230955A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- corrosion resistance
- drill pipe
- content
- excavating drill
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 36
- 239000010959 steel Substances 0.000 title claims abstract description 36
- 230000007797 corrosion Effects 0.000 title claims abstract description 26
- 238000005260 corrosion Methods 0.000 title claims abstract description 26
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract 3
- 229910052710 silicon Inorganic materials 0.000 claims abstract 3
- 229910052742 iron Inorganic materials 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 238000009412 basement excavation Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 229910052748 manganese Inorganic materials 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 238000005273 aeration Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、高温、高酸紫圧下で使用する耐食性の優れ
たドリルパイプ用鋼に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a steel for drill pipes which has excellent corrosion resistance and is used at high temperatures and under high acid pressure.
（従来の技術）
近年石油の代替エネルギーとして、世界げ９に地熱エネ
ルギーの利用のための研究開発が盛んになってきた。そ
れに伴ない、地熱井の掘削にも新しい方法が開発され、
例えば空気混入泥水堀りが、掘進能率の良いこと、およ
び逸泥対策上有利なことから注目されている。(Conventional Technology) In recent years, research and development into the use of geothermal energy as an alternative energy to oil has become active throughout the world. Along with this, new methods have been developed for drilling geothermal wells.
For example, aerated mud water excavation is attracting attention because of its high excavation efficiency and advantageous measures against lost mud.
しかしながらこの堀１４１Ｊ法は、泥水とともに空気を
圧入するため、坑井中でドリル・ξイブは、高温、高酸
素圧の過酷な腐食環境に晒らされる。さらに多（の地熱
井中に存在するＣｔ−が混入する場合、−ノー厳しい腐
食環境となる。However, in the trench 141J method, air is injected together with muddy water, so the drill ξ-ib is exposed to a harsh corrosive environment of high temperature and high oxygen pressure in the well. Furthermore, if a large amount of Ct present in geothermal wells is mixed in, a severe corrosive environment will result.
これらの対策として、泥水のｐｍの調整、インヒビター
の適用およびドリルパイプの内辰面コーティングなどが
施されるが、いずれも十分な効果があるとは云えず、ド
リルパイプの損耗が大きいのが、この空気混入泥水堀り
の欠点とされている。Countermeasures include adjusting the pm of the muddy water, applying inhibitors, and coating the inner surface of the drill pipe, but none of them can be said to be sufficiently effective, and the reason is that the wear and tear on the drill pipe is large. This is said to be a drawback of aerated muddy digging.
（発明が解決しようとする問題点）
本発明はこのような＃ｉ温、高ｍＡ圧でＣｔ−を含む空
気混入泥水堀りの環境下で１，１訂食性の曖れたドリル
パイプ用鋼を提供するもので、Ｃｒ、ＣｕおよびＭＯを
基本成分として構成される。(Problems to be Solved by the Invention) The present invention aims to develop a steel for drill pipes that has ambiguous 1.1 corrosion resistance under the environment of aerated muddy water excavation containing Ct- at #i temperature and high mA pressure. It is composed of Cr, Cu and MO as basic components.
（問題点を解決するための手段）
従来酸素分圧の高い環境で、 Ｃｒは安定な不動態皮膜
を形成させ、全面腐食を抑制する元素として知れており
、その効果は、Ｃｒ含有量が多いほど太きい。しかしＣ
ｔ−が存在すると、不動態皮膜が部分ビつに破壊され、
局部的な腐食が促進される。(Means for solving the problem) Conventionally, in an environment with high oxygen partial pressure, Cr is known as an element that forms a stable passive film and suppresses general corrosion, and this effect is due to the high Cr content. It's moderately thick. But C
In the presence of t-, the passive film is partially destroyed,
Localized corrosion is accelerated.
この傾向はＣｒ含有量が多いほど太きい。ＭＯｌＣｕは
このような不動態皮膜の欠陥部を補修する有効な合金元
素である。This tendency becomes stronger as the Cr content increases. MOlCu is an effective alloying element for repairing such defects in the passive film.
本発明は上述の観点からＣｒ 、 ＩＶＩｏ 、 Ｃｕ
を主要な合金元素として、それぞれの元素の腐食に対す
る単独の効果および相乗効果を得るもので、成分組成が
、Ｃ：０．０５〜０．４０％、 Ｓｉ二０．０５〜１．
０％、Ｍｎ ： ０．１〜２．０％、Ｐ二Ｏ，０２％以
下、Ｓ：０．０１５％以下、Ｃｕ ： ０．０５〜１．
０ ％、Ｃｒ ： １．０〜１５．０％、Ｎｉ ：
０．１〜１．０％、ＩＶＩｏ ： ０．１〜１．５％
、’ｙｉ ＠Ｆｅおよび不可赴ホシ不純物より構成され
るものである。From the above-mentioned viewpoint, the present invention provides Cr, IVIo, Cu
is used as the main alloying element to obtain the individual effect and synergistic effect of each element on corrosion, and the component composition is C: 0.05-0.40%, Si2 0.05-1.
0%, Mn: 0.1-2.0%, P2O, 02% or less, S: 0.015% or less, Cu: 0.05-1.
0%, Cr: 1.0-15.0%, Ni:
0.1-1.0%, IVIo: 0.1-1.5%
, 'yi@Fe and non-exportable impurities.
次に各成分組成を、上述のように限定した理由を説明す
る。Next, the reason why each component composition is limited as described above will be explained.
ＣはＣｒ、Ｍｏとの炭化物形成元素であるため、耐食性
に対しては少ない方が好ましいが、ドリルパイプとして
、必要な強度を確保するため、最低０．０５％は必要で
ある。一方Ｃ含有量が０．４％を超えると、耐食性とと
もに靭性を劣化せしめるため、その含有量を０．０５〜
０．４０％に限定した。Since C is a carbide-forming element with Cr and Mo, a smaller amount is preferable for corrosion resistance, but in order to ensure the necessary strength as a drill pipe, a minimum amount of 0.05% is required. On the other hand, if the C content exceeds 0.4%, the corrosion resistance and toughness will deteriorate, so the content should be reduced from 0.05% to
It was limited to 0.40%.
Ｓｉは製鋼時の脱酸剤として必要な元素であると同時に
、高温での脆化に対して有効な元素であるが、これらの
効果は０．０５％以下では得られない。一方その含有量
か１．０係を超えると、鋼を脆化せしめると同時に、圧
延、製雪時の表面紙が多発する。従ってＳｉの含有量は
、０．０５〜１００％に限定した。Si is a necessary element as a deoxidizing agent during steel manufacturing, and at the same time is an effective element against embrittlement at high temperatures, but these effects cannot be obtained at 0.05% or less. On the other hand, if the content exceeds a factor of 1.0, the steel becomes brittle and at the same time, surface paper formation occurs frequently during rolling and snowmaking. Therefore, the Si content was limited to 0.05 to 100%.
地は鋼の焼入性および強度を向上づ−る元素であり、そ
の効果を発揮するためには０．１％以上必碩であるが、
２．０％を超えると、造塊時に偏析し、靭性を劣化せし
めるため、ＩＶｆｎの含有量は０．１〜２．０％の範囲
とした。Calcium is an element that improves the hardenability and strength of steel, and it must be present in an amount of 0.1% or more in order to be effective.
If it exceeds 2.0%, it will segregate during agglomeration and deteriorate toughness, so the content of IVfn was set in the range of 0.1 to 2.0%.
Ｐは偏析し易い元素で、粒界を脆化させ、鋼の靭性を劣
化せしめるため、その上限を０．０２０％とした。P is an element that easily segregates, embrittles grain boundaries, and deteriorates the toughness of steel, so the upper limit was set at 0.020%.
Ｓは介在吻：１Ｖｆｎ Ｓ形成元素であり、鋼を脆化せ
しめる一方、腐食環境で溶解し易いＭｎＳ及び耐食性を
劣化させるため、その上限を０．０１５％と限定した。S is an element that forms S, and while it embrittles steel, it also degrades MnS, which is easily dissolved in a corrosive environment, and corrosion resistance, so the upper limit of S is set to 0.015%.
Ｃｕは鋼の活性溶解抑制に、効果のある密着性のよい非
晶質の錆ノーを形成せしめる元素であるが。Cu is an element that forms an amorphous rust layer with good adhesion that is effective in suppressing active dissolution of steel.
その含有量が０．０５％未満では効果は得られない。If the content is less than 0.05%, no effect will be obtained.
一方含有電が１．０％を超えて加えても、耐食性の向上
は認められないのみならず、靭性を劣化せしめろため、
Ｃｕの含有量は０．０５〜１．０％と限定した。On the other hand, even if the electrical content exceeds 1.0%, not only will no improvement in corrosion resistance be observed, but the toughness will deteriorate.
The content of Cu was limited to 0.05 to 1.0%.
Ｃｒは溶存改系の存在する環境において、鋼表面に不動
態皮膜を形成し、腐食抑制に非常に効果のある元素であ
るが、その含有量が１％未満では不十分である。また１
５％を超えて含有せしめても、それ以上の効果は認めら
れないため上限を１５．０係とした。Cr is an element that forms a passive film on the steel surface in an environment where dissolved reforming systems exist and is very effective in suppressing corrosion, but a content of less than 1% is insufficient. Also 1
Even if the content exceeds 5%, no further effect is observed, so the upper limit was set at 15.0%.
Ｃｔ−が存在する環境では、 Ｃｒ含有量が増加すると
、不動態皮膜の一部が破壊され、局部的に鋼の腐食か促
進される場合があり、含有量は５％以下が好ましい。In an environment where Ct- is present, when the Cr content increases, part of the passive film may be destroyed and corrosion of the steel may be locally accelerated, so the content is preferably 5% or less.
Ｎｉは耐食性向上に有効な元素であると同時に、Ｃｕ含
有鋼の熱間割れを防止する機能を有する元素であり、こ
れらの効果を発揮するためには０１％以上必要である。Ni is an element that is effective in improving corrosion resistance and at the same time has the function of preventing hot cracking in Cu-containing steel, and in order to exhibit these effects, 0.1% or more is required.
しかし１％を超えて含有せしめても、それ以上の効果は
認められないため、上限を１％とした。However, even if the content exceeds 1%, no further effect is observed, so the upper limit was set at 1%.
ＭｏはＣｔ−による孔食電位を責に上昇させたり、Ｃｒ
欠乏層部の溶解速度を抑制することにより、局部腐食の
防止に効果のある元素である。このような効果は、その
含有量が、０．１％以下では認められない。一方含有量
が１．５％を超えると、靭性な劣化せしめるため、Ｍｏ
の含有量は０．１〜１．５％の範囲に限定した。Mo increases the pitting potential due to Ct-, and Cr
It is an element that is effective in preventing local corrosion by suppressing the dissolution rate of the depleted layer. Such an effect is not observed when the content is 0.1% or less. On the other hand, if the Mo content exceeds 1.5%, the toughness deteriorates.
The content was limited to a range of 0.1 to 1.5%.
つぎに本発明鋼の実施例について、比較鋼と対比して説
明する。Next, examples of the steel of the present invention will be described in comparison with comparative steel.
表１．に本発明鋼と、比較鋼の成分組成および管鋼の腐
食速度を示した。Table 1. The chemical compositions of the invention steel and comparative steel and the corrosion rate of the pipe steel are shown.
腐食実験は、オートクレーブを用いて行なった。Corrosion experiments were conducted using an autoclave.
腐食液として５００ ｐｐｍの塩素イオンを含むように
、ＮａＣ１を溶解した水溶液中に、試験片を浸漬し、酸
系分圧として室温で５に９／ａｍ２Ｇを、オートクレー
プ内に圧入した。これを１８０℃に加熱し、５日間腐食
させた後に、香調の腐食減量より腐食速度を算出した。The test piece was immersed in an aqueous solution in which NaCl was dissolved so as to contain 500 ppm of chloride ions as a corrosive solution, and an acid partial pressure of 5 to 9/am2G was press-fitted into an autoclave at room temperature. After heating this to 180° C. and allowing it to corrode for 5 days, the corrosion rate was calculated from the corrosion loss of the aroma tone.
表１に本発明鋼と比較鋼の成分と、腐食速度を示した。Table 1 shows the components and corrosion rates of the invention steel and comparative steel.
本発明鋼および比較鋼ともに、Ｃｒの効果が顕著である
。またＣｒ含有量が同じ鋼で比較した場合に、本発明鋼
の耐食性の優れていることが明確である。The effect of Cr is remarkable in both the inventive steel and the comparative steel. Furthermore, when comparing steels with the same Cr content, it is clear that the steel of the present invention has excellent corrosion resistance.
例えば鋼１と鋼１２、鋼４と鋼１４および鋼７と％ｌ］
ｌ ５は、それぞれ同量のＣｒ含有量であるが、本発
明鋼１．４．７の腐食速度は、比較＠１３．１４．１５
のそれに対して、それぞれ７８％、８２％、６５％と低
い値となっている。For example, steel 1 and steel 12, steel 4 and steel 14, and steel 7 and %l]
l 5 have the same Cr content, but the corrosion rate of the invention steel 1.4.7 is lower than that of comparison @13.14.15
In contrast, the values are lower at 78%, 82%, and 65%, respectively.
また比ＷｙＡにおいて、Ｃｒを含有しないＪｌｌおよび
Ｃｒ含有量の少ない％’ｌ １２の腐食速度は特に大き
い。Further, in the ratio WyA, the corrosion rate of Jll which does not contain Cr and %'l 12 which has a small Cr content is particularly high.
（発明の効果）
以上の実施例から本発明鋼は、高温、高酸素圧下のＣｔ
−を含む水溶液中で、優れた耐食性を示すことが明らか
であり、過酷な腐食環境である空気混入泥水堀りに、本
発明鋼を適用することにより、より長期間に亘るドリル
パイプの使用が可能となり、操業面からの経済的効果も
太きい。(Effect of the invention) From the above examples, the steel of the present invention has Ct
It is clear that the steel of the present invention exhibits excellent corrosion resistance in aqueous solutions containing This makes it possible, and the economic effects from an operational perspective are also significant.
Claims (1)
Ｍｎ：０．１〜２．０％、Ｐ：０．０２％以下Ｓ：０．
０１５％以下、Ｃｕ：０．０５〜１．０％Ｃｒ：１．０
〜１５．０％、Ｎｉ：０．１〜１．０％Ｍｏ：０．１〜
１．５％ 残部Ｆｅおよび不可避不純物からなることを特徴とする
耐食性の優れた堀削ドリルパイプ用鋼。[Claims] Components are in weight%: C: 0.05 to 0.40%, Si: 0.05 to 1.0%
Mn: 0.1-2.0%, P: 0.02% or less S: 0.
015% or less, Cu: 0.05-1.0% Cr: 1.0
~15.0%, Ni: 0.1~1.0% Mo: 0.1~
A steel for excavating drill pipes with excellent corrosion resistance, characterized by the balance being 1.5% Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7375986A JPS62230955A (en) | 1986-03-31 | 1986-03-31 | Steel for excavating drill pipe excellent in corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7375986A JPS62230955A (en) | 1986-03-31 | 1986-03-31 | Steel for excavating drill pipe excellent in corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62230955A true JPS62230955A (en) | 1987-10-09 |
Family
ID=13527478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7375986A Pending JPS62230955A (en) | 1986-03-31 | 1986-03-31 | Steel for excavating drill pipe excellent in corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62230955A (en) |
Cited By (7)
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|---|---|---|---|---|
| CN100372965C (en) * | 2005-07-28 | 2008-03-05 | 宝山钢铁股份有限公司 | Steel for high temperature resistant anticorrosion heat insulating oil pipe and its manufacturing method |
| WO2012090562A1 (en) * | 2010-12-27 | 2012-07-05 | 日立金属株式会社 | Die steel having superior rusting resistance and thermal conductivity, and method for producing same |
| EP2489754A3 (en) * | 2011-02-18 | 2013-01-23 | Mitsubishi Materials Corporation | Hollow drilling steel rod and method of manufacturing the same |
| CN103938104A (en) * | 2014-05-12 | 2014-07-23 | 武汉钢铁(集团)公司 | Offshore drilling platform steel with fatigue strength of at least 560MPa and production method thereof |
| WO2014132868A1 (en) * | 2013-02-28 | 2014-09-04 | 日立金属株式会社 | Die steel and method for producing same |
| WO2014166252A1 (en) * | 2013-04-08 | 2014-10-16 | 宝山钢铁股份有限公司 | Super 13cr upset drill pipe manufacturing method |
| CN104313479A (en) * | 2014-09-30 | 2015-01-28 | 东营咸亨工贸有限公司 | Corrosion-resistant sucker rod and manufacturing method thereof |
-
1986
- 1986-03-31 JP JP7375986A patent/JPS62230955A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372965C (en) * | 2005-07-28 | 2008-03-05 | 宝山钢铁股份有限公司 | Steel for high temperature resistant anticorrosion heat insulating oil pipe and its manufacturing method |
| EP2660348A4 (en) * | 2010-12-27 | 2014-09-03 | Hitachi Metals Ltd | Die steel having superior rusting resistance and thermal conductivity, and method for producing same |
| JPWO2012090562A1 (en) * | 2010-12-27 | 2014-06-05 | 日立金属株式会社 | Mold steel excellent in rust resistance and thermal conductivity and method for producing the same |
| EP2660348A1 (en) * | 2010-12-27 | 2013-11-06 | Hitachi Metals, Ltd. | Die steel having superior rusting resistance and thermal conductivity, and method for producing same |
| WO2012090562A1 (en) * | 2010-12-27 | 2012-07-05 | 日立金属株式会社 | Die steel having superior rusting resistance and thermal conductivity, and method for producing same |
| JP5534482B2 (en) * | 2010-12-27 | 2014-07-02 | 日立金属株式会社 | Mold steel excellent in rust resistance and thermal conductivity and method for producing the same |
| US8430977B2 (en) | 2011-02-18 | 2013-04-30 | Mitsubishi Materials Corporation | Hollow drilling steel rod and method of manufacturing the same |
| EP2489754A3 (en) * | 2011-02-18 | 2013-01-23 | Mitsubishi Materials Corporation | Hollow drilling steel rod and method of manufacturing the same |
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