JP2013108556A - 高トルク締結性能に優れた管状ねじ継手 - Google Patents
高トルク締結性能に優れた管状ねじ継手 Download PDFInfo
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- JP2013108556A JP2013108556A JP2011253187A JP2011253187A JP2013108556A JP 2013108556 A JP2013108556 A JP 2013108556A JP 2011253187 A JP2011253187 A JP 2011253187A JP 2011253187 A JP2011253187 A JP 2011253187A JP 2013108556 A JP2013108556 A JP 2013108556A
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- film
- solid
- coating
- lubricating
- pin
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Images
Classifications
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- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
- F16L58/182—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for screw-threaded joints
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
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- C25D7/003—Threaded pieces, e.g. bolts or nuts
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
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- 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
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- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
- F16L15/004—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with axial sealings having at least one plastically deformable sealing surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/06—Screw-threaded joints; Forms of screw-threads for such joints characterised by the shape of the screw-thread
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- 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
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/08—Screw-threaded joints; Forms of screw-threads for such joints with supplementary elements
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M2201/041—Carbon; Graphite; Carbon black
- C10M2201/0413—Carbon; Graphite; Carbon black used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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Abstract
【解決手段】ねじ部とシール部4およびショルダー部5を含むねじ無し金属接触部とを含む接触表面をそれぞれ備えたピン1とボックス2とから構成される管状ねじ継手であって、ピンとボックスの少なくとも一方の部材の接触表面のショルダー部5を含む一部に第1の固体潤滑被膜10を有し、該少なくとも一方の部材の接触表面のうちの少なくとも該第1の固体潤滑被膜を有していない部分に粘稠液体潤滑被膜および第2の固体潤滑被膜から選ばれた別の潤滑被膜11を有し、前記第1の固体潤滑被膜の摩擦係数は前記別の潤滑被膜の摩擦係数より高く、前記第1の潤滑被膜と前記別の潤滑被膜の両方が存在する部分では、前記別の潤滑被膜が上に位置する。
【選択図】 図5
Description
管状ねじ継手の締結(メイクアップ)は、ピンをボックスに挿入した後、ピンまたはボックスを回転させることにより行われる。当初はねじ部だけが接触してねじが螺合し、締結の最終段階でシール部およびショルダー部が接触し始め、シール部およびショルダー部に所定の干渉量が得られると締結は完了する。
第1の固体潤滑被膜の膜厚は5〜40μm;
粘稠液体潤滑被膜の膜厚は5〜200μm、ただしこの粘稠液体潤滑被膜が前記第1の固体潤滑被膜の上に位置する場合には、第1の固体潤滑被膜の膜厚と粘稠液体潤滑被膜の膜厚との合計が200μm以下;
第2の固体潤滑被膜の膜厚は5〜150μm、ただしこの第2の固体潤滑被膜が前記第1の固体潤滑被膜の上に位置する場合には、第1の固体潤滑被膜の膜厚と第2の固体潤滑被膜の膜厚との合計が150μm以下。
1)粘稠液体潤滑被膜および固体潤滑被膜から選ばれた潤滑被膜;
2)固体防食被膜;
3)下層の粘稠液体潤滑被膜および固体潤滑被膜から選ばれた潤滑被膜と、上層の固体防食被膜。
ピンとボックスの少なくとも一方、好ましくは両方の接触表面は、その上に形成する被膜の密着性または保持性を高めるか、および/またはねじ継手の耐焼付き性を高めるためにために、ブラスト処理、酸洗、リン酸塩化成処理、蓚酸塩化成処理、硼酸塩化成処理、電気めっき、および衝撃めっき、およびそれらの2種以上から選ばれた方法により、予め表面処理することができる。
図3は、典型的な管状ねじ継手の出荷時の状態を模式的に示す。鋼管Aの両端には外面に雄ねじ部3aを有するピン1が形成され、カップリングBの両側には、内面に雌ねじ部3bを有するボックス2が形成されている。鋼管Aの一端には予めカップリングBが締付けられている。図示していないが、締付けられていない方の鋼管AのピンとカップリングBのボックスには、それぞれのねじ部の保護のためのプロテクターが出荷前に装着され、これらのプロテクターはねじ継手の使用前に取り外される。
ただし、ねじ継手のねじ部とシール部との間のねじ部に近い個所には、ねじ継手を締付けたときにはみ出た潤滑成分を逃がす目的で、ねじ継手の締結状態でもピンとボックスが互いに接触しない部分が設けられている。また、一部のねじ継手では、意図的にピンとボックスとが接触しない非接触領域を設けることもある。そのような、ねじ継手の締結状態でピンとボックスとが互いに接触しない部分は、接触表面から除外され、本発明に係る被膜を施しても、施さなくてもよい。
高摩擦固体潤滑被膜とは、摩擦係数が比較的高い固体潤滑被膜であり、ねじ継手の締付けの最終段階(ピンとボックスのショルダー部が当接し始め、シール部が所定の干渉量で密着するまで)で高摩擦状態を生じさせてTyを高めることによりΔTを大きくし、高トルクでの締付けでもショルダー部の降伏を起こりにくくする。
固体潤滑被膜および粘稠液体潤滑被膜の摩擦係数は、例えば、ファレックス試験機(FALEX Pin & Vee Block Machine)を用いたFALEX Pin & Vee Block法(以下、ファレックス法という)により、ASTM D2625(固体潤滑被膜の耐荷重性と寿命)またはASTM D2670(液体潤滑被膜の磨耗特性)に準拠して測定することができる。ファレックス法では、V型開先端部を有するブロック(Veeブロック)をピンの両側に対向させて配置し、ブロックに所定の加圧力を負荷しながらピンを回転させることにより摩擦係数を測定する。
粘稠液体潤滑被膜を形成するには、ねじ継手の接触表面に耐焼付き性改善のために従来から使用されてきたグリス潤滑油が使用できる。環境への悪影響が少ない、グリーンードープと呼ばれる、重金属粉を含有しないか、その含有量が少ないグリス潤滑油を使用することが好ましい。
金属石鹸の脂肪酸は、炭素数12〜30のものが、潤滑性や防錆性の観点から好ましい。脂肪酸は飽和と不飽和のいずれでもよく、また牛脂、ラード、羊毛脂、パーム油、菜種油及び椰子油などの天然油脂由来の混合脂肪酸、ならびにラウリン酸、トリデシル酸、ミリスチン酸、パルミチン酸、ラノパルミチン酸、ステアリン酸、イソステアリン酸、オレイン酸、エライジン酸、アラキン酸、ベヘン酸、エルカ酸、リグノセリン酸、ラノセリン酸、スルホン酸、サリチル酸、カルボン酸などの単一化合物のいずれでもよい。金属塩の形としてはカルシウム塩が好適であるが、他のアルカリ土類金属塩や亜鉛塩も使用できる。塩は、中性塩と塩基性塩のいずれでもよい。
ホスフェート:(R3O)(R4O)P(=O)(OR5)
ホスファイト:(R3O)(R4O)P(OR5)
チオホスフェート:(R3O)(R4O)P(=S)(OR5)
ジチオリン酸金属塩:[(R3O)(R6O)P(=S)−S]2−M
式中、R3、R6は炭素数1〜24のアルキル基、シクロアルキル基、アルキルシクロアルキル基、アリール基、アルキルアリール基、アリールアルキル基を、R4、R5は水素原子又は炭素数1〜24のアルキル基、シクロアルキル基、アルキルシクロアルキル基、アリール基、アルキルアリール基、アリールアルキル基を、Mはモリブデン(Mo)、亜鉛(Zn)又はバリウム(Ba)をそれぞれ意味する。
粘稠液状潤滑被膜は、塗布用組成物をねじ継手のピン及びボックスの少なくとも一方の部材の接触表面に塗布し、必要に応じて塗膜を乾燥させることにより形成される。使用する組成物は、塗布方法に応じて、上記成分に加えて、揮発性の有機溶剤を含有する。
本発明において第2の固体潤滑被膜として使用する固体潤滑皮膜は、基本的には固体潤滑作用を有する粉末(潤滑性粉末という)とバインダーとから構成される。この被膜は、バインダー含有液に潤滑性粉末を分散させた分散液の塗布により形成することができる。潤滑性粉末は被膜中においてバインダーに分散した状態で、ねじ継手表面に強固に接着しており、締付け作業の際の締付け圧力で薄く伸ばされる。それによりねじ継手の耐焼付き性を向上させる。
有機樹脂としては、耐熱性と適度な硬さと耐摩耗性を有するものが好適である。そのような樹脂としては、エポキシ樹脂、ポリイミド樹脂、ポリカルボジイミド樹脂、フェノール樹脂、フラン樹脂、シリコーン樹脂などの熱硬化性樹脂;ならびにポリオレフィン、ポリスチレン、ポリウレタン、ポリアミド、ポリエステル、ポリカーボネート、アクリル樹脂、熱可塑性エポキシ樹脂、ポリアミドイミド樹脂、ポリエーテルエーテルケトン、ポリエーテルサルホンなどの熱可塑性樹脂を例示できる。使用する樹脂は共重合体または2種以上の樹脂のブレンドであってもよい。
図4に関して上述したように、管状ねじ継手は実際に使用するまでの間、締付けが行われていないピンおよびボックスにプロテクターが装着されることが多い。固体防食被膜には、少なくともプロテクター装着時に加わる力では被膜が破壊されないことと、輸送や保管中に、露点の関係から凝縮した水に曝されても溶解しないこと、40℃を超える高温下でも容易には軟化しないことが要求される。このような特性を満たす任意の被膜を固体防食被膜として使用することができる。例えば、固体防食被膜は、場合により防錆成分を含有させた熱硬化性樹脂被膜であってもよい。
蛍光材料は、蛍光顔料、蛍光染料、および蛍光塗料に使用されている蛍光体のいずれでもよい。蛍光材料を含有する固体防食被膜は、可視光線下では無色または有色の透明であるが、ブラックライトまたは紫外線を照射すると発光・発色するので、被膜の有無や被膜厚みのムラなどを確認することができる。また、可視光線下では透明であるため、固体防食被膜の下の素地、すなわち、基体の表面を観察することができる。従って、ねじ継手のねじ部の損傷の検査が固体防食被膜により妨げられない。蛍光材料の添加量は、質量比で紫外線硬化樹脂1に対して、最大0.05程度までとすることが好ましい。
紫外線硬化樹脂を主成分とする組成物をねじ継手の接触表面に塗布した後、紫外線を照射して被膜を硬化させることにより紫外線硬化樹脂を主成分とする固体防食被膜が形成される。紫外線の照射は、一般市販の200〜450nm域の出力波長を持つ紫外線照射装置を用いればよい。紫外線源としては、例えば、高圧水銀ランプ、超高圧水銀ランプ、キセノンランプ、カーボンアークランプ、メタルハライドランプ、太陽光などを挙げることができる。
本発明に従ってピン及び/又はボックスの接触表面に高摩擦固体潤滑被膜と別の潤滑被膜および場合によりさらに固体防食被膜を形成した管状ねじ継手は、被膜の基体である接触表面に、粗面化のための下地処理を施して、切削加工後の表面粗さである3〜5μmより表面粗さが大きくなるようにすると、被膜密着性が高まり、その被膜の目的とする効果が向上する傾向がある。したがって、被膜形成前に、接触表面を下地処理して粗面化しておくことが好ましい。
潤滑被膜が粘稠液体潤滑被膜である場合には、表面のべたつきを軽減するため、潤滑被膜の上層に薄い乾燥固体潤滑被膜を形成してもよい。この乾燥固体潤滑被膜は、一般的な樹脂被膜(例、エポキシ樹脂、ポリアミド樹脂、ポリアミドイミド樹脂、ビニル樹脂など)でよく、水系組成物と有機溶剤系組成物のいずれからも被膜を形成できる。また、被膜中に少量のワックスを含有させてもよい。
表1に示す組成Aの炭素鋼製の特殊ねじ継手のピン表面およびボックス表面に対して、次に述べるように下地処理および被膜形成処理を行って、図5(A)に示す構成の被膜を形成した。
ボックス表面は、機械研削仕上げ(表面粗さ3μm)の後、80〜95℃の燐酸マンガン化成処理液中に10分間浸漬して、厚さ15μmの燐酸マンガン被膜(表面粗さ12μm)を形成することにより下地処理した。
ピン表面は、機械研削仕上げ(表面粗さ3μm)の後、75〜85℃の燐酸亜鉛化成処理液中に10分間浸漬して、厚さ12μmの燐酸亜鉛被膜(表面粗さ8μm)を形成することにより下地処理した。
表1に示す組成Cの13%Cr鋼製の特殊ねじ継手のピン表面およびボックス表面に対して、次に述べるように下地処理および被膜形成処理を行って、図5(C)に示す構成の被膜を形成した。
ボックス表面は、機械研削仕上げ(表面粗さ3μm)の後、電気めっきによりまずNiストライクめっき、次にCuめっきを施して、合計12μm厚のめっき被膜を形成した。この下地処理後の表面粗さは3μmのままであった。
ピン表面は、80番のサンドを吹き付けるサンドブラストにより表面粗さを10μmとする下地処理を施した。
表1に示す組成BのCr−Mo鋼製の特殊ねじ継手のピン表面およびボックス表面に対して、次に述べるように下地処理および被膜形成処理を行って、図6(C)に示す構成の被膜を形成した。
ボックス表面は、機械研削仕上げ(表面粗さ3μm)の後、電気めっきによりまずNiストライクめっき、次にCu−Sn−Zn合金めっきを施して、合計7μm厚のめっき被膜を形成した。この下地処理後の表面粗さは2μmであった。
ピン表面は、機械研削仕上げ(表面粗さ3μm)の後、75〜85℃の燐酸亜鉛化成処理液中に10分間浸漬して、厚さ12μmの燐酸亜鉛被膜(表面粗さ8μm)を形成することにより下地処理した。
表1に示す組成BのCr−Mo鋼製の特殊ねじ継手のピン表面およびボックス表面に対して、次に述べるように下地処理および被膜形成処理を行って、図6(B)に示す構成の被膜を形成した。
ボックス表面は、機械研削仕上げ(表面粗さ3μm)の後、電気めっきによりまずNiストライクめっき、次にCu−Sn−Zn合金めっきを施して、合計7μm厚のめっき被膜を形成した。この下地処理後の表面粗さは2μmであった。
・カルナバワックス:15%、
・ステアリン酸亜鉛:15%、
・液状ポリアルキルメタクリレート(ROHMAX社製VISCOPLEXTM 6-950):5%、
・腐食抑制剤(King Industries社製NA-SULTM Ca/W1935):49%、
・土状黒鉛:3.5%、
・酸化亜鉛:1%、
・二酸化チタン:5%、
・三酸化ビスマス:5%、
・シリコーン(ポリジメチルシロキサン):1%、並びに
・酸化防止剤(Ciba-Geigy社製)
IRGANOXTM L150:0.3%および
IRGAFOSTM 168:0.2%。
ピン表面は、機械研削仕上げ(表面粗さ3μm)の後、75〜85℃の燐酸亜鉛化成処理液中に10分間浸漬して、厚さ12μmの燐酸亜鉛被膜(表面粗さ8μm)を形成した。こうして下地処理したピン表面の全面に下記のようにして紫外線硬化樹脂からなる固体防食被膜を形成した。
表1に示す組成Aの炭素鋼製の特殊ねじ継手のピン表面およびボックス表面に対して、次に述べるように下地処理および潤滑処理を行った。
ボックス表面は、機械研削仕上げ(表面粗さ3μm)後、80〜95℃の燐酸マンガン化成処理液中に10分間浸漬して、厚さ15μmの燐酸マンガン被膜(表面粗さ12μm)を形成した。こうして下地処理したボックス表面に、API規格BUL 5A2に準拠した、粘稠液体状のコンパウンドグリスを塗布して潤滑被膜を形成した。コンパウンドグリスの塗布量はピンとボックスの合計の塗布量50gであった。塗布面積は合計でおよそ1400cm2であった。
ピン表面は、機械研削仕上げ(表面粗さ3μm)の後、75〜85℃の燐酸亜鉛化成処理液中に10分間浸漬して、厚さ12μmの燐酸亜鉛被膜(表面粗さ8μm)を形成した。こうして下地処理したピン表面に、ボックス表面に用いたのと同じコンパウンドグリスを塗布した。
(比較例2)
表1に示す組成BのCr−Mo鋼製の特殊ねじ継手のピン表面およびボックス表面に対して、次に述べるように下地処理および被膜形成処理を行った。
ボックス表面は、機械研削仕上げ(表面粗さ3μm)後、80〜95℃の燐酸マンガン化成処理液中に10分間浸漬して、厚さ12μmの燐酸マンガン被膜(表面粗さ10μm)を形成した。こうして下地処理したボックス表面の全面に、実施例1に記載した粘稠液体潤滑被膜を同じ方法により形成した。溶剤の揮発後に厚さ約60μmの粘稠液体潤滑被膜が形成された。この潤滑被膜の摩擦係数は0.04である。
ピン表面には、機械研削仕上げ(表面粗さ3μm)後、75〜85℃の燐酸亜鉛化成処理液中に10分間浸漬して、厚さ8μmの燐酸亜鉛被膜(表面粗さ8μm)を形成した。こうして下地処理したピン表面の全面にボックス表面と同じ粘稠液体潤滑被膜を厚み60μmで形成した。
表1に示す組成BのCr−Mo鋼製の特殊ねじ継手のピン表面およびボックス表面に対して、次に述べるように下地処理および被膜形成処理を行った。
ボックス表面は、機械研削仕上げ(表面粗さ3μm)後、80〜95℃の燐酸マンガン化成処理液中に10分間浸漬して、厚さ12μmの燐酸マンガン被膜(表面粗さ10μm)を形成した。こうして下地処理したボックス表面の全面に実施例4に記載した固体潤滑被膜を同様の方法で形成した。冷却後、厚さ約50μmの固体潤滑被膜(摩擦係数0.03)が形成された。
ピン表面には、機械研削仕上げ(表面粗さ3μm)後、75〜85℃の燐酸亜鉛化成処理液中に10分間浸漬して、厚さ12μmの燐酸亜鉛被膜(表面粗さ8μm)を形成した。こうして下地処理したピン表面の全面に、実施例4に記載した紫外線硬化樹脂被膜(膜厚25μm)を同様の方法で形成した。
Claims (10)
- ねじ部とシール部およびショルダー部を含むねじ無し金属接触部とからなる接触表面をそれぞれ備えたピンとボックスとから構成される管状ねじ継手であって、ピンとボックスの少なくとも一方の部材の接触表面のショルダー部を含む一部に第1の固体潤滑被膜を有し、該少なくとも一方の部材の接触表面のうちの少なくとも前記第1の固体潤滑被膜を有していない部分に粘稠液体潤滑被膜および第2の固体潤滑被膜から選ばれた別の潤滑被膜を有し、前記第1の固体潤滑被膜の摩擦係数は前記別の潤滑被膜の摩擦係数より高く、前記第1の潤滑被膜と前記別の潤滑被膜の両方が存在する部分では、前記別の潤滑被膜が上に位置することを特徴とする管状ねじ継手。
- 前記接触表面のショルダー部を含む一部が接触表面のねじ無し金属接触部である、請求項1に記載の管状ねじ継手。
- ピンとボックスの少なくとも一方の部材のねじ無し金属接触部が前記第1の固体潤滑被膜を有し、該部材のねじ部が粘稠液体潤滑被膜および第2の固体潤滑被膜から選ばれた別の潤滑被膜を有する、請求項2に記載の管状ねじ継手。
- ピンとボックスの少なくとも一方の部材のねじ無し金属接触部が前記第1の固体潤滑被膜を有し、該部材の接触表面の全面が、前記固体潤滑被膜の上から形成された、粘稠液体潤滑被膜および第2の固体潤滑被膜から選ばれた別の潤滑被膜を有する、請求項2に記載の管状ねじ継手。
- 前記ピンとボックスの一方の部材の接触表面が、ショルダー部を含むその一部に形成された第1の固体潤滑被膜と、少なくとも該第1の固体潤滑被膜を有していない部分に形成された粘稠液体潤滑被膜および第2の固体潤滑被膜から選ばれた別の潤滑被膜とを有しており、他方の部材の接触表面は、粘稠液体潤滑被膜および固体潤滑被膜から選ばれた潤滑被膜;固体防食被膜;ならびに下層の粘稠液体潤滑被膜および固体潤滑被膜から選ばれた潤滑被膜と上層の固体防食被膜とからなる2層被膜から選ばれた被膜を有する、請求項1に記載の管状ねじ継手。
- 前記固体防食被膜が紫外線硬化樹脂を主成分とする被膜である、請求項5に記載の管状ねじ継手。
- 前記ピンおよびボックスの少なくとも一方の接触表面が、被膜形成の前に、ブラスト処理、酸洗、リン酸塩化成処理、蓚酸塩化成処理、硼酸塩化成処理、電気めっき、および衝撃めっき、およびそれらの2種以上から選ばれた方法により表面処理されている、請求項1〜6のいずれかに記載の管状ねじ継手。
- 前記第1の固体潤滑被膜の膜厚が5〜40μmである、請求項1〜6のいずれかに記載の管状ねじ継手。
- 前記粘稠液体潤滑被膜の膜厚が5〜200μmであり、ただしこの粘稠液体潤滑被膜が前記第1の固体潤滑被膜の上に位置する場合には、第1の固体潤滑被膜の膜厚と粘稠液体潤滑被膜の膜厚との合計が200μm以下である、請求項8に記載の管状ねじ継手。
- 前記第2の固体潤滑被膜の膜厚が5〜150μmであり、ただしこの第2の固体潤滑被膜が前記第1の固体潤滑被膜の上に位置する場合は、第1の固体潤滑被膜の膜厚と第2の固体潤滑被膜の膜厚との合計が150μm以下である、請求項8に記載の管状ねじ継手。
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JP2011253187A JP5722752B2 (ja) | 2011-11-18 | 2011-11-18 | 高トルク締結性能に優れた管状ねじ継手 |
MX2014005953A MX357752B (es) | 2011-11-18 | 2012-11-16 | Junta tubular roscada que tiene desempeño mejorado de gran par. |
US14/348,923 US9752710B2 (en) | 2011-11-18 | 2012-11-16 | Tubular threaded joint having improved high torque performance |
UAA201406838A UA111250C2 (uk) | 2011-11-18 | 2012-11-16 | Трубне нарізне з'єднання, яке має поліпшену характеристику високого моментного навантаження |
PL12850587T PL2780618T3 (pl) | 2011-11-18 | 2012-11-16 | Rurowe połączenie gwintowe o poprawionych właściwościach dużego momentu obrotowego |
MYPI2014701164A MY189998A (en) | 2011-11-18 | 2012-11-16 | Tubular threaded joint having improved high torque performance |
CN201280056216.9A CN103946617B (zh) | 2011-11-18 | 2012-11-16 | 具有改善的高扭矩性能的管状螺纹接头 |
AU2012337667A AU2012337667B2 (en) | 2011-11-18 | 2012-11-16 | Tubular threaded joint having improved high torque performance |
CA2849667A CA2849667C (en) | 2011-11-18 | 2012-11-16 | Tubular threaded joint having improved high torque performance |
EP12850587.2A EP2780618B1 (en) | 2011-11-18 | 2012-11-16 | Tubular threaded joint having improved high torque performance |
EA201490997A EA026556B1 (ru) | 2011-11-18 | 2012-11-16 | Трубное резьбовое соединение, имеющее улучшенную характеристику высокой моментной нагрузки |
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PCT/JP2012/080403 WO2013073712A1 (en) | 2011-11-18 | 2012-11-16 | Tubular threaded joint having improved high torque performance |
ARP120104338A AR088904A1 (es) | 2011-11-18 | 2012-11-19 | Union roscada tubular con desempeño mejorado ante elevados esfuerzos de torsion |
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EA037192B1 (ru) * | 2017-05-22 | 2021-02-17 | Ниппон Стил Корпорейшн | Резьбовое соединение для труб или трубок и способ изготовления резьбового соединения для труб или трубок |
WO2020166500A1 (ja) * | 2019-02-12 | 2020-08-20 | 日本製鉄株式会社 | 管用ねじ継手 |
JPWO2020166500A1 (ja) * | 2019-02-12 | 2021-12-02 | 日本製鉄株式会社 | 管用ねじ継手 |
RU2782310C1 (ru) * | 2019-02-12 | 2022-10-25 | Ниппон Стил Корпорейшн | Резьбовое соединение для труб |
JP7301891B2 (ja) | 2019-02-12 | 2023-07-03 | 日本製鉄株式会社 | 管用ねじ継手 |
US11933431B2 (en) | 2019-02-12 | 2024-03-19 | Nippon Steel Corporation | Threaded connection for pipes |
WO2022255166A1 (ja) * | 2021-05-31 | 2022-12-08 | Jfeスチール株式会社 | 固体潤滑被膜形成用の薬剤、油井管、及び油井管ねじ継手 |
JPWO2022255166A1 (ja) * | 2021-05-31 | 2022-12-08 | ||
JP7474449B2 (ja) | 2021-05-31 | 2024-04-25 | Jfeスチール株式会社 | 固体潤滑被膜形成用の薬剤、油井管、及び油井管ねじ継手 |
Also Published As
Publication number | Publication date |
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MY189998A (en) | 2022-03-22 |
CN103946617B (zh) | 2016-02-17 |
CN103946617A (zh) | 2014-07-23 |
JP5722752B2 (ja) | 2015-05-27 |
US9752710B2 (en) | 2017-09-05 |
BR112014008612A2 (pt) | 2017-04-18 |
EA026556B1 (ru) | 2017-04-28 |
MX357752B (es) | 2018-07-23 |
BR112014008612C8 (pt) | 2020-06-02 |
EP2780618B1 (en) | 2019-09-25 |
CA2849667A1 (en) | 2013-05-23 |
CA2849667C (en) | 2016-06-07 |
AU2012337667B2 (en) | 2015-08-20 |
UA111250C2 (uk) | 2016-04-11 |
BR112014008612B8 (pt) | 2020-04-28 |
BR112014008612B1 (pt) | 2019-11-12 |
MX2014005953A (es) | 2015-02-05 |
EP2780618A4 (en) | 2015-11-11 |
AR088904A1 (es) | 2014-07-16 |
WO2013073712A1 (en) | 2013-05-23 |
EP2780618A1 (en) | 2014-09-24 |
EA201490997A1 (ru) | 2014-11-28 |
PL2780618T3 (pl) | 2020-02-28 |
AU2012337667A1 (en) | 2014-04-03 |
US20140284919A1 (en) | 2014-09-25 |
AU2012337667A8 (en) | 2014-04-10 |
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