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  • 专利说明
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    • 专利摘要:
    The invention relates to a threaded portion of a tubular element for a tubular threaded joint having an axis of revolution, the portion comprising a thread extending on its outer or inner peripheral surface, and a first sealing surface on the peripheral surface, the first sealing surface being adapted to form a metal-metal interference with a corresponding second sealing surface and belonging to a complementary threaded portion of a tube. The thread and the first sealing surface are coated with a corrosion-resistant and anti-seizing metal layer in which zinc (Zn) is the major element by weight.
    公开号:FR3035474A1
    申请号:FR1553661
    申请日:2015-04-23
    公开日:2016-10-28
    发明作者:Arnaud Verleene；Nicolas Baudin；Cedric Vogt；Adil Jaafar
    申请人:Vallourec Oil and Gas France SAS；Nippon Steel Corp；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD [001] The present invention relates to a tubular element for drilling and / or exploitation of hydrocarbon wells, and more specifically to the invention. threaded end of such an element. This end may be of the male or female type, and is adapted to be connected to a corresponding end of a similar element to form a seal or a connection. The invention also relates to a threaded joint resulting from the screw connection of two tubular elements, one of which may be a sleeve with two female ends. [003] Tubular element for drilling and exploitation of hydrocarbon wells means any element of substantially tubular shape capable of being assembled with another element, of the same type or not, in order to constitute, in particular, either a hydrocarbon well drilling column, an underwater riser for maintenance (called work-over riser in English) or the operation of such wells, such as an operating column (riser in English language), or a column of casing or production involved in the operation of the well.
    [0002] The invention can also be applied to the elements used in a drill string, such as, for example, drill pipes (English drill pipes), heavy rods (heavy weight drill pipes in English), the masses -tiges (drill collars in English), and the joint parts of the rods and heavy rods (tool joint in English language). [004] Each tubular element comprises an end portion having a male threaded zone or a female threaded zone intended to be screwed with a corresponding end portion of a similar element. Thus assembled, the elements compose what is called a joint or a connection. [005] These threaded tubular components of a connection are assembled under defined constraints to meet the clamping and sealing requirements imposed by the conditions of use, specifically a defined torque is targeted. In addition, it should be known that the threaded tubular components may have to undergo several cycles of screwing and unscrewing, especially in service. [6] The conditions of use of these threaded tubular components give rise to different types of constraints. These have been reduced, inter alia, by the use of films or greases on the sensitive parts of these components, such as threaded areas, abutting areas, or metal / metal sealing surfaces. [7] The induced stresses include in particular storage constraints requiring the application of storage greases (different screw greases applied before commissioning). However, there are other solutions of using organic coatings. [8] Thus, the screwing operations are generally under heavy axial load, for example because of the weight of a tube several meters in length to be assembled by the threaded joint, possibly aggravated by a slight misalignment of the axis of threaded elements to be assembled. This induces risks of jamming at the threaded zones and / or at the metal / metal sealing surfaces. Thus, threaded areas as well as metal / metal sealing surfaces are commonly coated with lubricants. [9] In addition, threaded tubular components are often stored and then screwed into an aggressive environment. This is the case, for example, in an offshore situation in the presence of salt spray or in an onshore situation in the presence of sand, dust, and / or or other pollutants. It is therefore necessary to use different types of corrosion-resistant coating on the screw-biased surfaces, which is the case with threaded areas or in tight contact, which is the case with metal / metal sealing surfaces and 25 stops. [10] However, in view of environmental standards, it appears that the use of greases meeting the standard API RP 5A3 (American Petrol Institute) is not a solution for the long term, insofar as these fats are likely to be extruded out of the tubular components and released into the environment or into the well, inducing plugs that require special cleaning operations. [11] In order to address the issues of durable resistance to corrosion, seizing, and environmental prerogatives, an alternative to grease has been developed. This not only satisfies the corrosion resistance and galling performance, but also the industrial constraints of manufacturing threaded ends. [12] Since 1969, WHITFORD (registered trade mark) has been offering high performance coatings from a mixture of polyamide-imide resin and fluoropolymers for threaded fasteners which require an adaptation of the friction in the fast screwing / unscrewing operations. [13] It has been furthermore investigated since 2002, in the context of threaded connections, polyamide-imide resin-based coatings, for lubricating and securing seizure resistance during screwing as described in EP1378698 and EP1959179. . [14] These prior arts mainly propose obtaining dry films from a polyamide-acid amic acid precursor dissolved in a polar solvent or in an ethanol / toluene mixture. The dry film is generally applied to provide lubrication according to the contact pressures in the thread. The proportion of fillers is relatively high with a pigment / binder mass ratio of between 0.25 and 4 and preferably greater than 3. The dry film is therefore advantageously sacrificial and sufficiently resistant to wear as a function of the solid lubricant. [015] Application VVO 2004/033951 relates to a threaded metal tube for the petroleum extraction industry with a threaded end portion whose surface is treated and in which the metal surface has a surface roughness (Ra) between 2.0 μm and 6 μm, this area being covered by a uniform layer of a dry anti-corrosion coating and a second uniform layer of a dry lubricant coating. Alternatively, the two layers can be combined in a single layer of a dry anti-corrosion coating comprising a dispersion of dry lubricant particles. Nevertheless, the dispersion of particles on the anti-corrosive layer deposited on the substrate introduces a certain heterogeneity. Also known is EP2128506 concerning a male / female type threaded joint for steel tubes having a contact surface comprising a threaded portion and a non-threaded metal portion on contact metal. The surface of at least one of the male or female members is coated with a first plating layer made of a Cu-Zn alloy or a Cu-Zn-M1 alloy (where M1 is at least one element selected from Sn, Bi and In). Despite the interesting results of these copper-containing layers, the anti-corrosive properties associated therewith have shown limitations that have been found to be worthwhile. [17] Thus, the corrosion and seizure resistance of these disclosures can be improved by proposing, in addition to the functional properties of corrosion resistance and good resistance to galling, gas and liquid for the connections thanks to the invention explained below. From this observation, the present invention proposes to coat a threaded element or a seal formed by the assembly of threaded elements for drilling and / or exploitation of hydrocarbon wells.
    [0003] SUMMARY OF THE INVENTION [18] According to a first aspect, the invention relates to a threaded portion of a tubular member for a tubular threaded joint for drilling or operating hydrocarbon wells having an axis of revolution, said portion comprising a thread extending on its outer or inner peripheral surface, and a first sealing surface on said peripheral surface, said first sealing surface being adapted to form a metal-to-metal interference with a second bearing surface; corresponding sealing and belonging to a complementary threaded portion of a tube, characterized in that said thread and said first sealing surface are coated with a metal anti-corrosion and anti-seizing layer whose zinc (Zn) is the major element by weight. [19] Preferably, the anti-corrosion and anti-seizing metal layer is deposited electrolytically. [20] Preferably, the anti-corrosion and anti-seizing metal layer contains at least 50% zinc (Zn) by weight. [021] Preferably, the anti-corrosion and anti-seizing metal layer has a thickness of between 4 and 20 μm. [022] Preferably, the anti-corrosion and anti-seizing metal layer comprises a substance chosen from the group consisting of pure zinc (Zn) and a zinc alloy (Zn) of the Zn-X type, in which X is selected from nickel (Ni), iron (Fe), magnesium (Mg) and manganese (Mn). Preferably, the anti-corrosion and anti-seizing metal layer is a zinc-nickel alloy (Zn-Ni) whose nickel content (Ni) is between 12-15% by weight and whose microstructure is single-phase and gamma phase (y). [23] Preferably, the anti-corrosion and anti-seize metal layer is coated with a lubricating layer comprising a resin and a dry solid lubricant powder dispersed in said resin. [24] Preferably, the anti-corrosion and anti-seizing metal layer is coated with a passivation layer comprising trivalent chromium (Cr (III)), said passivation layer being formed between the metal layer and the lubricating layer. [25] Preferably, the anti-corrosion and anti-seizing metal layer is coated with a passivation layer comprising trivalent chromium (Cr (III)). [26] Preferably, the passivation layer is coated with a barrier layer consisting of a mineral matrix layer comprising particles of silicon dioxide (SiO 2). [27] Preferably, the passivation layer is coated with a barrier layer consisting of an organomineral matrix layer comprising particles of silicon dioxide (SiO 2). [28] Preferably, the portion further comprises a first abutment adapted to come into contact at the end of screwing with a corresponding second stop and belonging to a complementary threaded portion of the tube. [029] Preferably, the threaded portion is made of steel. [30] In an alternative, the threaded portion is of the male type, having a thread extending over its outer peripheral surface and a first sealing surface on said outer peripheral surface. [31] In another alternative, the threaded portion is of the female type, having a thread extending over its inner peripheral surface and a first sealing surface on said inner peripheral surface. [32] According to a second aspect, the invention relates to a threaded portion of a tubular member for a tubular threaded joint for drilling or operating hydrocarbon wells having an axis of revolution, said portion comprising a thread extending on its outer or inner peripheral surface, and a first sealing surface on said peripheral surface, said first sealing surface being adapted to form a metal-to-metal interference with a corresponding second sealing surface 3035474; a complementary threaded portion, characterized in that said thread and said first sealing surface are coated with a metal anti-seizing layer whose zinc (Zn) is the major element by weight, said anti-seizing metal layer being at least partially coated with a lubricating layer comprising a resin and a dry solid lubricant powder dispersed from in said resin. [33] Preferably, in this threaded portion the anti-seize metal layer is deposited electrolytically. [34] Preferably, the anti-corrosion and anti-seize metal layer 10 contains at least 50% zinc (Zn) by weight. [35] Preferably, the anti-seizing metal layer has a thickness of between 4 and 20 μm. [36] Preferably, the lubricating layer has a thickness of between 5 and 50 μm. [037] Preferably, the anti-seizing metal layer comprises a substance selected from the group consisting of pure zinc (Zn) and a zinc alloy (Zn) of the Zn-X type, in which X is selected among nickel (Ni), iron (Fe), magnesium (Mg) and manganese (Mn). Preferably, the anti-seizing metal layer is a zinc-nickel (Zn-Ni) binary alloy whose nickel content (Ni) is between 12% and 15% by weight and whose microstructure is single-phase and of gamma phase (y). [38] Preferably, the threaded portion according to the invention comprises a passivation layer comprising trivalent chromium (Cr (III)), said passivation layer being formed between the anti-seizing metal layer and the lubricating layer. [39] Preferably, the dry solid lubricant powder is selected from the group consisting of polytetrafluoroethylenes (PTFE), molybdenum dithio carbamates (MoDTC), molybdenum disulphides (M0S2), carbon blacks (C) , fluorides of graphite (CF) or a mixture thereof. [040] Preferably, the resin is selected from the group consisting of polyvinyl resins, epoxy resins, acrylic resins, polyurethane resins and polyamide-imide resins. [41] Preferably, the resin is of acrylic type and the dry solid lubricant powder contains 3% to 15% of carbon blacks, MoS2, or molybdenum dithiocarbamates (MoDTC), taken alone or in combination . [42] Preferably, the threaded portion according to the invention further comprises a first stop adapted to come into contact at the end of screwing with a corresponding second stop and belonging to a complementary threaded portion. [43] Preferably, the threaded portion is steel. [44] In one case, the threaded portion according to the invention is of the male type, having a thread extending over its outer peripheral surface and a first sealing surface on said outer peripheral surface. [45] In another case, the threaded portion according to the invention is of the female type, having a thread extending over its inner peripheral surface and a first sealing surface on said inner peripheral surface. [46] According to a third aspect, the invention relates to a tubular threaded joint for drilling or operating hydrocarbon wells comprising a portion of a tubular male end member having an axis of revolution and provided with a first thread extending around the axis of revolution, said male end portion being complementary to a portion of a female end tubular element having an axis of revolution and provided with a second thread; extending about the axis of revolution, said male and female end portions being screw-fitable, each of the male and female end portions further comprising a sealing surface with metal-to-metal interference, metal, characterized in that the thread and the bearing surface of one of the male or female end portions are coated with a first anti-corrosion and anti-seizing metal layer whose zinc (Zn) is The majority element by weight, said first anti-corrosion and anti-seize metal layer being coated with a first passivation layer, the threading and the bearing surface of the male or female end complementary portion are coated with a second metal layer anti-seizure whose zinc (Zn) is the majority by weight, said second anti-seizing metal layer being at least partially coated with a lubricating layer comprising a resin and a dry solid lubricant powder dispersed in said resin. Preferably, the tubular threaded joint according to the invention is such that at least one of the first and second metal layers is deposited electrolytically. [48] Preferably, the tubular threaded joint according to the invention is such that at least one of the first and second metal layers contains at least 50% zinc (Zn) by weight. [49] Preferably, the tubular threaded joint according to the invention is such that at least one of the first and second metal layers has a thickness of between 4 and 20 μm. [050] Preferably, the lubricating layer has a thickness of between 5 and 50 μm. [051] Preferably, the tubular threaded joint according to the invention is such that at least one of the first and second metal layers comprises a substance chosen from the group consisting of pure zinc (Zn) and a binary zinc alloy (Zn ) of Zn-X type, wherein X is selected from nickel (Ni), iron (Fe), magnesium (Mg) and manganese (Mn). Preferably, the tubular threaded joint according to the invention is such that at least one of the first and second metal layers is a zinc-nickel (Zn-Ni) binary alloy whose nickel (Ni) content is between 12% and 15% by weight and whose microstructure is single phase and gamma phase (y). [052] Preferably, the first passivation layer comprises trivalent chromium (Cr (III)). [053] Preferably, the tubular threaded joint according to the invention is such that a second passivation layer comprising trivalent chromium (Cr (III)) is formed between the second anti-seizing metal layer and the lubricating layer. [054] Preferably, the dry solid lubricant powder is chosen from the group consisting of polytetrafluoroethylenes (PTFE), molybdenum disulphides (M0S2), molybdenum dithio carbamates (MoDTC), carbon blacks (C), graphite fluorides (CF) or a mixture thereof. [055] Preferably, the tubular threaded joint according to the invention is such that the resin 30 is selected from the group consisting of polyvinyl resins, epoxy resins, acrylic resins, polyurethane resins and polyamide-imide resin. [56] Preferably, the resin is of acrylic type and the dry solid lubricant powder contains 3% to 15% of carbon blacks, MoS2, or molybdenum dithio carbamates (MoDTC), taken alone or in combination . [57] Preferably, the tubular threaded joint according to the invention is such that at least one of the first and second passivation layers is coated with a barrier layer consisting of a mineral matrix layer comprising particles of silicon dioxide ( Si02). [58] Preferably, the mineral matrix layer further comprises potassium oxide. [059] Preferably, the tubular threaded joint according to the invention is such that at least one of the first and second passivation layers is coated with a barrier layer consisting of an organomineral matrix layer comprising silicon dioxide ( Si02). [60] Preferably, the tubular threaded joint according to the invention is such that at least one of the first and second passivation layers is coated with a dry lubricant layer. [61] Preferably, the male end portion according to the invention further comprises a first stop and the female end portion further comprises a second stop, the first and second stops being able to come into contact with one another. with the other at the end of screwing. [62] Preferably, the tubular threaded joint according to the invention is such that the male and female end portions are made of steel. DESCRIPTION OF THE DRAWINGS Fig. 1 is a close-up view of a threaded end-tube coated surface in section along the longitudinal axis in a first embodiment according to the invention. [064] Figure 2 shows a close-up view of a threaded end coated tube surface in section along the longitudinal axis in a second embodiment 30 according to the invention. [65] Fig. 3 shows a close-up view of a threaded end-tube coated surface in section along the longitudinal axis in a third embodiment according to the invention. [66] Fig. 4 shows a close-up view of a threaded end surface of a tube sectionwise along the longitudinal axis in a fourth embodiment according to the invention. [67] Fig. 5 is a close-up view of a threaded end coated tube surface in section along the longitudinal axis in a fifth embodiment according to the invention. [068] Figure 6 shows comparative photographs between a threaded element according to the invention and a threaded element of the prior art. [69] Fig. 7 shows a photograph of a threaded member according to one embodiment of the invention.
    [0004] MODES OF ACHIEVEMENTS [70] The invention will be better understood through the following lines which give non-limiting explanations. It should be noted that the substrate on which the different layers according to the invention are deposited is preferably steel and that the invention can be carried out indifferently on a male or female end. [071] The threaded portion according to the invention systematically comprises a thread which extends on its outer or inner peripheral surface depending on whether it is a male or female threaded portion, respectively, and a first sealing surface. on said peripheral surface, said first sealing surface being adapted to form a metal-to-metal interference with a corresponding second sealing surface and belonging to a complementary threaded portion. The sealing range is important in the threaded portion according to the invention because, coated according to the invention, it provides a seal to the gas and the liquid with the metal / metal contact. Preferably, the metal / metal contact is effected with interference. [72] In the lines below the layers deposited will be at least on the thread of the threaded portion according to the invention and on the sealing surface. [73] According to the invention, on the substrate of the tubular threaded portion, preferably made of steel, there will be deposited a metal layer whose zinc (Zn) is the major element by weight. The metal layer according to the invention is ideally deposited electrolytically. The principle of this type of deposit is recalled below. The major advantage of the metal layer, besides its mechanical strength, is its microstructural uniformity. It is pointed out that microstructural uniformity does not necessarily imply a single-phase crystalline structure; the opposite is true. [74] For the purposes of the invention, the term metal layer means a layer made of metal. Of course, impurities may be present but preferentially, the layer is exclusively metallic. The exclusively metallic layer 10 according to the invention has the advantage of having a microstructural uniformity. Indeed, under an optical microscope, with a magnification x500 the observed microstructure has a homogeneous appearance. [75] Indeed, both the mechanical strength and the microstructural uniformity of the metal layer are significantly higher than those of the organic coatings, which furthermore have a lower temperature withstand. [76] Electrolysis deposition is a technique used here to reduce the metal ions or oxides to pure metals by applying an electrical current density ranging from 1 ampere / dm2 to 100 ampere / dm2 in the context of the invention. The electrolytic bath is at a temperature between 18 ° C and 50 ° C.
    [0005] Below 18 ° C, the bath efficiency is insufficient. Above 50 ° C, the chemical components (eg additives) of the bath will be degraded. For example, a so-called electrolysis buffer coating method may require very high currents in the upper end of the range. [077] Electrolytes are necessary to ensure electrical conductivity and may be aqueous solutions, molten salts. A metal layer in which Zn (Zn) is the majority by weight can be deposited electrolytically and is the technique used in the invention. Other metals such as copper or nickel can also be deposited electrolytically. [078] Electrolysis in an aqueous medium is performed with a two-electrode system consisting of an anode and a cathode. The reduction of ions occurs at the cathode and is defined by the following reaction: ## EQU1 ## where M represents a metal and n is an integer. [079] In the case of electro-deposition, the cathode is the substrate on which the deposit is made. In this case, ideally, a steel in the case of the invention. [080] At the anode, the reaction obtained is an oxidation of the water to gaseous dioxygen. According to the two equations below according to whether one is in acid or alkaline medium respectively: - 411 ± 4L (1) OR 10 (2) [81] One of the main difficulties with electrolysis in an aqueous medium is the competition between the reduction of metal ions and the reduction of the solvent at the cathode, defined by the reaction: (3) [82] In theory, the reactions that should take place are related to the potentials of the electrodes which are themselves related to each material chosen, but the experiment according to the invention shows results that were difficult to predict. Indeed, the kinetics of the reactions is complex. [83] Modem Electroplating, John Wiley 8 (Sons, Inc. 5th Edition, p285307, Section 10: Electrodeposition of Zinc and Zinc Alloys, R. VVinand, 2010 provides further details on the electroplating of zinc or zinc. Zinc alloy on substrates [84] The deposition of a metal layer in which zinc (Zn) is the predominant element by weight according to the invention on the substrate, which is preferably steel, makes it possible to modify Both the corrosion resistance, the galling resistance and the mechanical strength of the assembly.) The presence of an alloy deposit with an element other than zinc (Zn) as a majority element, that is, that is, having the highest content by weight among the alloying elements is not desired because the corrosion resistance performance has not made it possible to reach the targeted target. zinc (Zn) is the predominant element by weight is preferential Between 4 and 20 μm, the anti-corrosion effect is reduced below 4 μm because the layer risks having insufficient corrosion resistance. Above 20 pm there is a high risk of H2 accumulation by combination of H + as formed according to equation (1). This accumulation is even higher than the layer is thick.
    [0006] It is thus possible to trap H2 gas in the structure which will weaken it by generating internal stresses. In a still preferred manner, the thickness of the metal layer is between 6 and 15 μm. [85] The metal layer in which Zn (Zn) is the weight-predominant electrolytically deposited element can be supplemented by additional treatments, such as the formation of a passivation layer on the metal layer. Alternatively, it is also possible to deposit, over the entire metal layer or on a portion of the latter, a lubricating layer comprising a resin and a dry solid lubricant powder dispersed in this resin. In addition to its lubricating function, this layer can contribute to the anti-corrosion function. It is quite possible according to the invention to deposit such a lubricating layer on the passivation layer. The lubricating layer has a thickness of between 5 μm and 50 μm. Below 5 pm, the lubricating effect is not satisfactory. Above 50 pm, the maximum torque at screwing becomes too high. On the other hand, above 50 μm there is a risk of forming chips from the damaged coating. Such chips may fall to the bottom of the oil well, and consequently degrade the operating conditions. Preferably, the lubricating layer is of a thickness of between 10 μm and 30 μm. [86] Other variants consist in depositing on the passivation layer formed a barrier layer commonly called sealer in the English language. [87] Another variant also consists in depositing on the entire passivation layer formed or on only one part, a lubricating layer. [88] It is also quite possible to deposit a lubricating layer with or without anti-corrosion function on the metal layer, in whole or in part only, without having formed a passivation layer. [89] The deposition of the different layers according to the different configurations of the invention is carried out by successive operations on the preferentially metallic substrate, or even more preferably on the steel. These are: chemical or electrochemical degreasing of the substrate with solvents, and / or alkaline solutions followed by rinsing. Then, chemical or electrochemical etching of the substrate surface preferably carried out by immersing the substrate in an acid solution is carried out to remove the surface oxides. [90] Surface activation can be carried out with the following products: hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid, hydrofluoric acid or a mixture of these acids. [091] According to the invention, it is deposited on the end threaded portion comprising, a thread and a first sealing surface a metal layer whose zinc (Zn) is the major element by weight. This implies that the deposition of the metal layer, ideally carried out by electrolysis, may be: zinc (Zn) only or a binary zinc alloy (Zn) of the Zn-X type, in which X is chosen from nickel (Ni) iron (Fe), magnesium (Mg) and manganese (Mn). [92] Pure Zn would be used for its anti-corrosion and anti-seize characteristics. It is used, according to the invention, a metal layer in which zinc (Zn) is the major element in weight because, compared to iron, in the context of a steel-type substrate, zinc has a more negative standard potential. . In other words, Zn provides effective cathodic protection against corrosion in this case. [93] In the context of a steel-type substrate, the use of pure Zn is therefore not discarded, but it is preferred Zn-Ni because the pure Zn is consumed (erodes chemically) at a speed higher. It would therefore require a particularly thick layer, which is not indicated on the thread and the sealing range. Indeed, a thick layer will result in a lower clearance at the threads, which will hinder the optimization of the contact surfaces that one wishes to make, depending on the type of connection. Zn-Ni, would be used not only for its anticorrosion characteristics, but also for anti-seizing. [94] Zn-Fe is also a sacrificial protection against the preferred steel-type substrate. The Zn-Fe layer is a good adhesion promoter. Zn-Fe allows a lower corrosion rate than pure Zn. [95] Zn-Mg is of interest because this alloy slows the rate of corrosion due to the presence of Mg in the case of a substrate of preferential type that is to say steel. [96] Zn-Mn, in the context of a steel-type substrate, is a barrier protection. Nevertheless, the barrier function is of interest in terms of anti-corrosion resistance because it will not be attacked and will remain covering. In addition, it has a very good resistance to corrosion in natural exposure. [97] The electrolytic deposition, it is recalled, makes it possible to improve the uniformity of the deposit from a microstructural point of view. There are of course other ways of depositing a metal coating such as galvanizing, spraying or even sherardization. [098] The alternative of forming a passivation layer on the metal layer further improves the corrosion resistance. [099] The alternative of depositing, on at least a portion of the portion, a lubricating layer comprising a resin and a dry solid lubricant powder dispersed in said resin makes it possible to better control the tightening torque of the connection and the avoid galling. The dry solid lubricant powder is preferably chosen from the group consisting of polytetrafluoroethylenes (PTFE), molybdenum disulphides (M0S2), carbon blacks (C), graphite fluorides (CF) or a mixture of those -this. PTFE (polytetrafluoroethylenes) provide lubricating properties with a stable coefficient of friction with the contact pressure. The tightening torque is therefore better controlled. The average size of PTFE particles according to the invention is less than 15 μm. Above 15 μm the dispersion in the resin would be heterogeneous because the particles would be too thick in relation to the total thickness of the lubricating layer. The resin is chosen from the group consisting of polyvinyl resins, epoxy resins, acrylic resins, polyurethane resins and polyamide-imide resins. The polyvinyl resins, epoxy resins, and acrylic resins adhere satisfactorily to the Zn-containing metal layer or the passivation layer. The polyurethane resins have the advantage of being particularly stable chemically and are easy to implement by crosslinking. The polyamide-imide resins are particularly resistant to wear. In a preferred embodiment, the resin is of acrylic type and the dry solid lubricant powder dispersed in said resin contains 3 to 15% of carbon blacks, MoS2, or molybdenum dithio-carbamates (MoDTC), taken alone or in combination.
    [0007] This combination has synergy in terms of anti-seizing, adhesion and torque control properties. The molybdenum disulphides (M0S2), molybdenum dithio carbamates (MoDTC) carbon blacks (C), graphite fluorides (CF) or a mixture thereof, provide lubricating properties with a stable coefficient of friction. with the contact pressure. The tightening torque is therefore better controlled. The MoS2 derivatives also have all the lubricating properties mentioned above. In a preferred embodiment, the Zn-containing metal layer deposits are a binary Zn-Ni alloy containing between 12% and 15% Ni, the remainder of course being Zn and inevitable impurities whose sum of The contents are strictly less than 3% by weight. Indeed, below 12% of Ni, the corrosion resistance is not optimized whereas above 15% of nickel, the coating structure is no longer single-phase but polyphase and the phases involved induce internal stresses and the fragility of the coating. Finally, the microstructure of this preferred metal deposition of Zn-Ni with 12% to 15% nickel is preferably of single-phase type and the phase in the presence is of the gamma type. This crystalline structure of gamma type ensures a better resistance to corrosion. Preferably, the passivation layer comprises trivalent chromium Cr (III). This trivalent chromium is more stable than Cr (II) and not harmful to health such as Cr (VI). Preferably, the passivation layer, when present, is coated with a barrier layer consisting of a mineral matrix layer 30 comprising silicon dioxide particles (SiO 2). This barrier layer improves the anti-corrosion resistance. [0113] An alternative is to use a passivation layer coated with a barrier layer, consisting of an organomineral matrix layer comprising silicon dioxide particles (SiO 2). This barrier layer improves the anti-corrosion resistance. One embodiment consists in depositing a lubricating layer on the passivation layer in order to better control the tightening torque of the connection and to avoid galling. [0115] The metal / metal contact of the threaded portions of the invention is effected with interference. The interference between the male and female elements of the invention corresponds to a diametrical interference between the conjugate points of the two surfaces of revolution. More particularly, this diametric interference is defined by the difference in cross-sectional diameter of the surfaces at the conjugate points of the two surfaces of revolution. This difference can be measured before the assembly of said elements, and can be evaluated at the contact surface when the two elements are assembled to one another. In practice, it is common to provide a diameter of a portion of the outer peripheral surface of the male member slightly greater than the diameter of a portion of the inner peripheral surface of the female member. There is then an exchange of matter in the contact zone of these surfaces. Thus, a strong contact pressure is provided between said conjugate points. EXAMPLES OF EXAMPLES Non-limiting examples of threaded portions (either male, female, or both) of steel described hereinafter were electrolytically treated with a zinc-nickel binary alloy. The zinc-nickel binary alloy used in the examples is available from ELECTROPOLI (registered trademark) under the trade name ZELTEC 2.4 (registered trademark). The parameters of the electrolytic treatment are as follows: - temperature of the electrolytic bath: Temp. = 36 ° C; pH of the electrolytic bath: pH = 5.4; The density of the applied current: J = 2 A / dm 2; residence time in the electrolytic bath: t = 20 min. It is therefore an electrolytic treatment in an acid medium. This gives a metal layer comprising zinc (Zn). The thickness of the metal layer is between 4.0 μm and 12.5 μm (extreme values), typically between 6 μm and about 8 μm. The nickel (Ni) content is generally between 12% and 15% (extreme values). It follows that the zinc (Zn) content is generally between 85% and 88% (extreme values). The metal layer has both anti-seizing properties and anti-corrosion properties. When a barrier layer is present, it may especially be the product sold under the name FINIGARD 460 by the company COVENTYA (registered trademark). When a passivation layer is present it may in particular be the product marketed under the name of FINIDIP 128 CF (cobalt free) by the company CO VENTYA (registered trademark). It may also be the product marketed under the name Eco Tri (registered trademark) NoCo by the company ATOTECH (registered trademark) Deutschland GmbH. These two products have the particular advantage of being devoid of hexavalent chromium (Cr (VI)). In the following exemplary embodiments, each threaded portion is intended to form part of a tubular threaded joint. Each threaded portion has an axis of revolution and comprises a thread. The thread extends over the outer peripheral surface of the threaded portion when it is a male element; conversely, the thread extends over the inner peripheral surface of the threaded portion when it is a female element. Each threaded portion further comprises a first sealing surface on the peripheral surface which is arranged to form a metal-to-metal interference with a second corresponding sealing surface and belonging to a complementary threaded portion of a tube. A threaded portion complementary to a male portion is a female threaded portion. A threaded portion complementary to a female portion is a male threaded portion. In the following exemplary embodiments, reference is made to a set of two complementary threaded portions adapted to form a tubular joint when they are screwed to one another. It should be understood that surface treatments, layers and finishing treatments can be applied to either a male threaded portion or a female threaded portion. Accordingly, when an exemplary embodiment refers to a male portion having a particular first coating (set of layers) and refers to a female portion having a certain particular second coating (other set of layers), then it should be understood that It is possible to invert the particular first and second coatings of the threaded portions, i.e. to apply the particular first coating to the female portion and to apply the particular second coating to the male portion.
    [0008] EXAMPLE 1 [0124] Figure 1 shows a substrate 100 of steel. The substrate 100 is shaped to form a female threaded portion 102 and a male threaded portion 104. The male threaded portion 104 is coated with a first anti-corrosion and anti-seizing metal layer 108. The first metal layer 108 is deposited electrolytically as described above. The first metal layer 108 consists of a zinc-nickel binary alloy (Zn-Ni) and contains zinc (Zn), namely on average 85.7%. The first metal layer 108 has an average thickness of 8.3 μm. In addition, the first metal layer has a single-phase gamma-type microstructure. The first metal layer 108 is coated with a passivation layer 110 as described above. By definition, the passivation layer has anticorrosive properties. Optionally, the passivation layer 110 is coated with a barrier layer 114 as described above which also has anticorrosive properties. The female threaded portion 102 is coated with a second anti-seizing metal layer 106. The second metal layer 106 is made of a binary alloy of Zn-Ni. The second metal layer 106 is deposited electrolytically. The second metal layer 106 contains predominantly zinc (Zn) by weight. In addition, the second metal layer has a single-phase gamma-type microstructure. The second metal layer 106 is coated with a lubricating layer 112. In the embodiment of FIG. 1, the lubricating layer 112 is of the hot-melt type (English hot-melt) having both lubricants and anti-corrosive properties. The thermofusible lubricating layer has the following weight composition: Matrix: 70 to 95% Solid lubricant: 5 to 30% The matrix has the following composition: Polyethylene homopolymer: 8 to 30% 90% Carnauba wax: 5 to 30% Zinc stearate: 5 to 30% Calcium sulphonate derivative: 0 to 50% 25 Alkyl polymethacrylate: 0 to 15% Color: 0 to 1% Antioxidant: 0 to 1% Silicone (surfactant element): 0 to 2%. EXAMPLE 2 [0132] FIG. 2 shows a substrate 100 made of steel. The substrate 100 is shaped to form a female threaded portion 102 and a male threaded portion 104. The male threaded portion 104 is coated with an anti-corrosion and anti-seize metal layer 108. metal 108 is deposited electrolytically as described above. The metal layer 108 consists of a zinc-nickel binary alloy (Zn-Ni) and contains zinc (Zn), namely on average 86.5%. The first metal layer 108 has an average thickness of 6.7 μm. The metal layer 108 of the male threaded portion 104 is coated with a passivation layer 110 as described above. By definition, the passivation layer has anticorrosive properties. The passivation layer 110 of the male threaded portion 104 is coated with a barrier layer 114 as described above which also has anticorrosive properties. The female threaded portion 102 is coated with an anti-corrosion and anti-seizing metal layer 108. The metal layer 108 is deposited electrolytically as described above. The metal layer 108 consists of a zinc-nickel binary alloy (Zn-Ni) and contains zinc (Zn), namely on average 86.4%. The metal layer 108 has an average thickness of 7.4 μm. [0137] The metal layer 108 of the female threaded portion 102 is coated with a passivation layer 110 as described above. By definition, the passivation layer has anticorrosive properties. The passivation layer 110 of the female threaded portion 102 is coated with a lubricating layer 112. In the embodiment of FIG. 2, the lubricating layer 112 is of hot-melt type (hot-melt in English language) presenting both lubricating properties and anti-corrosive properties.
    [0009] EXAMPLE 3 [0139] Figure 3 shows a substrate 100 of steel. The substrate 100 is shaped to form a female threaded portion 102 and a male threaded portion 104. The male threaded portion 104 is coated with an anti-corrosion and anti-seize metal layer 108. The metal layer 108 is deposited electrolytically as described above. The metal layer 108 consists of a zinc-nickel binary alloy (Zn-Ni) and contains zinc (Zn), namely on average 86.5%. The first metal layer 108 has an average thickness of 7 μm. [0141] The metal layer 108 of the male threaded portion 104 is coated with a passivation layer 110 as described above. By definition, the passivation layer has anticorrosive properties. [0142] The passivation layer 110 of the male threaded portion 104 is coated with a barrier layer 114 as described above which also has anticorrosive properties. The substrate 100 of the female threaded portion 102 has a surface roughness. The surface roughness was obtained by a sanding process (sandblasting in English). In particular, a sanding process makes it possible to obtain a surface roughness (Ra) of between 1.0 μm and 10 μm. In the embodiment of Figure 3, the surface roughness (Ra) is about 2 pm. The female threaded portion 102 is coated with an anti-corrosion and anti-seizing metal layer 108. The metal layer 108 is deposited electrolytically as described above. The metal layer 108 consists of a zinc-nickel binary alloy (Zn-Ni) and contains zinc (Zn), namely on average 85.6%. The metal layer 108 has an average thickness of 7 μm. [0145] The metal layer 108 of the female threaded portion 102 is coated with a passivation layer 110 as described above. By definition, the passivation layer has anticorrosive properties. The passivation layer 110 of the female threaded portion 102 is coated with a lubricating layer 112. In the embodiment of FIG. 3, the lubricating layer 112 comprises a resin and a dry solid lubricant dispersed therein. . In this case, the lubricating layer 112 consists of a polyurethane resin (PU2K type) in which particles of carbon black are dispersed.
    [0010] EXAMPLE 4 Figure 4 shows a substrate 100 of steel. The substrate 100 is shaped to form a female threaded portion 102 and a male threaded portion 104. The male threaded portion 104 is coated with an anti-corrosion and anti-seize metal layer 108. The metal layer 108 is deposited electrolytically as described above. The metal layer 108 consists of a zinc-nickel binary alloy (Zn-Ni) and contains zinc (Zn), namely on average 86.3%. The first metal layer 108 has an average thickness of 7.3 μm. [0149] The metal layer 108 of the male threaded portion 104 is coated with a passivation layer 110 as described above. By definition, the passivation layer has anticorrosive properties. Optionally, the passivation layer 110 of the male threaded portion 104 is coated with a barrier layer 114 as described above which also has anticorrosive properties. The substrate 100 of the female threaded portion 102 has a surface roughness. The surface roughness was obtained by a sanding process (Sandblasting in English). In the embodiment of Figure 4, the surface roughness (Ra) is about 2 pm. Alternatively, the sanding process may be carried out on the anti-corrosion and anti-seizing metal layer 108 of the female threaded portion 102 described below. The female threaded portion 102 is coated with an anti-corrosion and anti-seizing metal layer 108. The metal layer 108 is electrolytically deposited as described above. The metal layer 108 consists of a zinc-nickel binary alloy (Zn-Ni) and contains zinc (Zn), namely on average 86.8%.
    [0011] The metal layer 108 has an average thickness of 7.7 μm. As mentioned above, a sanding process may be carried out on the metal layer 108 female threaded portion 102. In one embodiment of the invention, the metal layer 108 has a surface roughness (Ra) about 2 pm. This allows a good grip of the passivation layer or the lubricating layer 112 described below. [0154] The metal layer 108 of the female threaded portion 102 is optionally coated with a passivation layer 110 as described above. By definition, the passivation layer has anticorrosive properties. The passivation layer 110 of the female threaded portion 102 is coated with a lubricating layer 112. In the embodiment of FIG. 4, the lubricating layer consists of epoxy and MoS 2. Alternatively, it is possible not to provide a passivation layer 110 and 10 to apply the lubricating layer 112 directly on the metal layer 108 of the female threaded portion 102 (or directly on the metal layer 108 of the portion threaded male if necessary).
    [0012] EXAMPLES [0157] Figure 5 shows a substrate 100 of steel. The substrate 100 is shaped to form a female threaded portion 102 and a male threaded portion 104. [0158] The substrate 100 of the male threaded portion 104 has a surface roughness. The surface roughness was obtained by a sanding process. In the embodiment of Figure 5, the surface roughness (Ra) is about 2 pm. Alternatively, the sanding process may be carried out on the anticorrosion and anti-seizing metal layer 108 of the female threaded portion 102 described below. The male threaded portion 104 is coated with an anti-corrosion and anti-seize metal layer 108. The metal layer 108 is electrolytically deposited as described above. The metal layer 108 consists of a zinc-nickel binary alloy (Zn-Ni) and contains zinc (Zn), namely on average 86.7%. The metal layer 108 has an average thickness of 7.2 μm. As mentioned above, a sanding process can be carried out on the metal layer 108 male threaded portion 104. In one embodiment of the In the invention, the metal layer 108 has a surface roughness (Ra) of about 2 μm. This allows a good grip of the passivation layer or the lubricating layer 112 described below. [0161] The metal layer 108 of the male threaded portion 104 is optionally coated with a passivation layer 110 as described above. By definition, the passivation layer has anticorrosive properties. The passivation layer 110 of the male threaded portion 104 is coated with a lubricating layer 112. In the embodiment of Figure 5, the lubricating layer 112 is made of acrylic resin and carbon black. Alternatively, it is possible not to provide a passivation layer 110 and 10 to apply the lubricating layer 112 directly to the metal layer 108 of the male threaded portion 104. The substrate 100 of the threaded portion female 102 has a surface roughness. The surface roughness was obtained by a sanding process. In the embodiment of Figure 5 the surface roughness (Ra) is about 2 μm. Alternatively, the sanding process may be carried out on the anticorrosion and anti-seizing metal layer 108 of the female threaded portion 102 described below. The female threaded portion 102 is coated with an anti-corrosion and anti-seizing metal layer 108. The metal layer 108 is deposited electrolytically as described above. The metal layer 108 consists of a zinc-nickel binary alloy (Zn-Ni) and contains zinc (Zn), that is to say on average in weight content of 86.2%. The metal layer 108 has an average thickness of 6.7 μm. As mentioned above, a sanding process may be carried out on the metal layer 108 female threaded portion 102. In one embodiment of the invention, the metal layer 108 has a surface roughness (Ra ) about 2 pm. This allows good adhesion of the passivation layer or the lubricating layer 112 described hereinafter. The metal layer 108 of the female threaded portion 102 is optionally coated with a passivation layer 110 as described above. By definition, the passivation layer has anticorrosive properties. The passivation layer 110 of the female threaded portion 102 is coated with a lubricating layer 112. In the embodiment of FIG. 5, the lubricating layer 112 is made of an acrylic resin and is a dispersion of carbon black in this resin. Alternatively, it is possible not to provide a passivation layer 110 and 5 to apply the lubricating layer 112 directly on the metal layer 108 of the female threaded portion 102 (or directly on the metal layer 108 of the portion threaded male if necessary). In particular embodiments, at least some of the layers may extend over other members of the threaded portion. For example, when a stop is present on the threaded portion, layers may extend thereon. The Applicant has carried out comparative roughness tests between threaded portions before electrolytic deposition of a metal layer according to the invention and after the electrolytic deposition of a metal layer according to the invention. The roughness was measured in a direction parallel to the machining direction of said portions. The results are reported in Table 1. Before electroplating After electroplating ZnNi ZnNi Roughness Ra (μm) Rz Qum) Rt (μm) Ra (μm) Rz (μm) Rt (μm) None Mean 0.458 2.453 2.45 0.330 2023, 4.316 Sandblasting Dev. St. n.a. n.a. 0,166 0,569 3,895 Average sanding 3,254 21,243 21,243 1,495 9,918 11,561 Dev. St. 0.171 1.271 1.271 0.166 1.127 2.060 Table 1. Roughness comparison. Dev. St = Standard deviation n.a. = Not applicable [0172] Ra is the mean deviation roughness - it is the arithmetic mean of the absolute values of the deviations between the peaks and troughs measured on the roughness profile. Rz is the so-called maximum average roughness - this is the average of the maximum heights measured over several (eg 5) parts selected over a roughness profile. Rt is the so-called total roughness - this is the maximum height measured over the entire roughness profile. [0173] Table 1 shows that threaded portion samples after electroplating exhibit roughness in a direction parallel to the machining direction decreased relative to threaded portion samples prior to electroplating. The electrolytic deposition according to the invention has in particular a leveling effect. [0174] Figure 6 shows photographs of threaded elements taken with an optical microscope. More particularly, FIG. 6 shows two selected portions of a threaded element of the prior art in comparison with two similar selected parts of a threaded element according to the invention. The microscope used is optical. The magnification is: x500. The scale indicated on each photograph is 50 μm. The threaded element of the prior art is shown in the photographs 200a and 200b. The steel substrate 202 of the prior art is coated with a layer 204 comprising lamellar zinc particles dispersed in an epoxy resin. Layer 204 was applied according to a method known in the art. The method of the prior art comprises pneumatically spraying layer 204 at room temperature onto substrate 202, followed by hot baking the substrate / layer assembly. During the spraying phase the composition of the layer 204 comprises a solvent. The baking stage makes it possible to eliminate the solvent and to crosslink the layer 204. The photographs 200a and 200b show that the layer 204 is heterogeneous. Indeed, the layer 204 of the threaded element of the prior art has a non-uniform microstructure. The threaded element of the invention is shown in the photographs 300a and 300b.
    [0013] The substrate 100 is coated with a first metal layer 108 made of a Zn-Ni binary alloy of the type described in Example 1 above. The binary alloy was applied electrolytically to form a homogeneous layer. Indeed, the photographs 300a and 300b of Figure 6 show that the first metal layer of 108 of the threaded element of the invention has a uniform microstructure. In the present case it is a single-phase microstructure of range (y) type. FIG. 7 shows a photograph 400 of a threaded element according to the invention taken with an optical microscope. The magnification is: x500. The scale indicated on each photograph is 50 pm. The substrate 100 is coated with a second metal layer 106 made of a binary Zn-Ni alloy of the type described in Example 1 above. The binary alloy was applied electrolytically to form a homogeneous layer. The metal layer has a thickness of about 4 μm to about 6 μm (average thickness of about 5 μm). The metal layer is coated with a HMS-3 hotmelt lubricant layer 112 as described in Example 1. The lubricating layer has a thickness of about 40 μm to about 43 μm. The second metal layer 106 has a uniform microstructure. Indeed, the second metal layer consisting of a binary Zn-Ni alloy also has a single-phase microstructure range (y). Figures 6 and 7 therefore demonstrate that the metal layer according to the invention has a uniform microstructure. The tube elements of the invention, namely the male or female threaded portions as well as the seals made with these portions, meet the requirements of the international standard API RP 505 (3rd Edition, July 2003). In particular, the tube elements have resisted screwing / unscrewing procedures while responding positively to the sealing conditions. [0183] The tube elements of the invention, namely the male or female threaded portions and the seals made with these portions, fully meet the requirements of European Standard NF EN ISO 9227 in connection with salt spray tests. In particular, the tube elements have positively exhibited corrosion resistance for 1000 hours of exposure to an aggressive environment.
    权利要求:
    Claims (15)
    [0001]
    REVENDICATIONS1. Threaded portion of a tubular member for a tubular threaded joint having an axis of revolution, said portion comprising a thread extending over its outer or inner peripheral surface, and a first sealing surface on said peripheral surface, said first bearing surface sealing being adapted to form a metal-metal interference with a second corresponding sealing surface and belonging to a complementary threaded portion of a tube, characterized in that said thread and said first sealing surface are coated with a layer metal anti-corrosion and anti-seizing zinc (Zn) is the major element by weight.
    [0002]
    The threaded portion of claim 1, wherein the anti-corrosion and anti-seizing metal layer is deposited electrolytically.
    [0003]
    3. threaded portion according to one of the preceding claims, wherein the anti-corrosion and anti-seizing metal layer contains at least 50% zinc (Zn) by weight.
    [0004]
    4. threaded portion according to one of the preceding claims, wherein the anti-corrosion and anti-seizing metal layer is of a thickness between 4 and 20 pm.
    [0005]
    Threaded portion according to one of the preceding claims, wherein the anti-corrosion and anti-seizing metal layer comprises a substance selected from the group consisting of pure zinc (Zn) and a binary zinc alloy (Zn) of Zn-X type, wherein X is selected from nickel (Ni), iron (Fe), magnesium (Mg) and manganese (Mn).
    [0006]
    The threaded portion according to claim 5, wherein the anti-corrosion and anti-seizing metal layer is a zinc-nickel (Zn-Ni) alloy having a nickel (Ni) content of between 12-15% by weight. and whose microstructure is single phase and gamma phase (y).
    [0007]
    The threaded portion according to one of claims 1 to 6, wherein said anti-corrosion and anti-seizing metal layer is coated with a lubricating layer comprising a resin and a dry solid lubricant powder dispersed in said resin.
    [0008]
    The threaded portion of claim 7, wherein said anti-corrosion and anti-seize metal layer is coated with a passivation layer comprising trivalent chromium (Cr (III)), said passivation layer being formed between the metal layer. and the lubricating layer. 3035474 30
    [0009]
    The threaded portion of claim 1 to 6, wherein said anti-corrosion and anti-seize metal layer is coated with a passivation layer comprising trivalent chromium (Cr (III)). 5
    [0010]
    The threaded portion of claim 9, wherein the passivation layer is coated with a barrier layer consisting of a mineral matrix layer comprising silicon dioxide (SiO 2) particles.
    [0011]
    The threaded portion according to claim 9, wherein the passivation layer is coated with a barrier layer consisting of an organomineral matrix layer comprising silicon dioxide (SiO 2) particles.
    [0012]
    12. Threaded portion according to one of the preceding claims, wherein said portion further comprises a first abutment adapted to come into contact at the end of screwing with a corresponding second stop and belonging to a complementary threaded portion of the tube.
    [0013]
    Threaded portion according to one of the preceding claims, wherein said threaded portion is made of steel.
    [0014]
    Threaded portion according to one of the preceding claims, wherein said portion is of male type, having a thread extending over its outer peripheral surface and a first sealing surface on said outer peripheral surface.
    [0015]
    Threaded portion according to one of the preceding claims, wherein said portion is of female type, having a thread extending on its inner peripheral surface and a first sealing surface on said inner peripheral surface. 20 25
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    同族专利:
    公开号 | 公开日
    AU2016251610A1|2017-09-14|
    JP6774426B2|2020-10-21|
    EA201791912A1|2017-12-29|
    EP3286287B1|2020-02-19|
    CN107567564A|2018-01-09|
    BR112017017848A2|2018-04-10|
    AU2016251610B2|2018-12-20|
    PL3286287T3|2020-11-02|
    CA2981681A1|2016-10-27|
    EP3286287A1|2018-02-28|
    FR3035474B1|2017-04-28|
    MX2017013530A|2018-02-21|
    JP2018513326A|2018-05-24|
    AR104335A1|2017-07-12|
    WO2016170031A1|2016-10-27|
    CA2981681C|2019-08-20|
    US20180172197A1|2018-06-21|
    EA035552B1|2020-07-06|
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    法律状态:
    2016-04-21| PLFP| Fee payment|Year of fee payment: 2 |
    2016-10-28| PLSC| Search report ready|Effective date: 20161028 |
    2017-03-22| PLFP| Fee payment|Year of fee payment: 3 |
    2018-03-22| PLFP| Fee payment|Year of fee payment: 4 |
    2019-03-25| PLFP| Fee payment|Year of fee payment: 5 |
    2019-11-15| CD| Change of name or company name|Owner name: NIPPON STEEL CORPORATION, JP Effective date: 20191007 Owner name: VALLOUREC OIL AND GAS FRANCE, FR Effective date: 20191007 |
    2020-03-19| PLFP| Fee payment|Year of fee payment: 6 |
    2021-03-23| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1553661A|FR3035474B1|2015-04-23|2015-04-23|TUBULAR THREADED ELEMENT COMPRISING ANTI-CORROSION AND ANTI-INFLATURE METAL COATING|FR1553661A| FR3035474B1|2015-04-23|2015-04-23|TUBULAR THREADED ELEMENT COMPRISING ANTI-CORROSION AND ANTI-INFLATURE METAL COATING|
    CA2981681A| CA2981681C|2015-04-23|2016-04-21|Threaded tubular element provided with a metallic anti-corrosion and anti-galling coating|
    PL16720753T| PL3286287T3|2015-04-23|2016-04-21|Threaded tubular element provided with a metallic anti-corrosion and anti-galling coating|
    EA201791912A| EA035552B1|2015-04-23|2016-04-21|Threaded tubular element provided with a metallic anti-corrosion and anti-galling coating|
    PCT/EP2016/058847| WO2016170031A1|2015-04-23|2016-04-21|Threaded tubular element provided with a metallic anti-corrosion and anti-galling coating|
    EP16720753.9A| EP3286287B1|2015-04-23|2016-04-21|Threaded tubular element provided with a metallic anti-corrosion and anti-galling coating|
    JP2017554355A| JP6774426B2|2015-04-23|2016-04-21|Threaded tubular member with metal anti-corrosion and anti-wear coating|
    CN201680015668.0A| CN107567564A|2015-04-23|2016-04-21|It is provided with that metallicity is anticorrosive and the threaded tubular element of anti-scuff coating|
    US15/565,238| US20180172197A1|2015-04-23|2016-04-21|Threaded tubular element provided with a metallic anti-corrosion and anti-galling coating|
    BR112017017848-6A| BR112017017848B1|2015-04-23|2016-04-21|THREADED PORTION OF A TUBULAR ELEMENT FOR DRILLING AND/OR OPERATING A HYDROCARBIDE WELL|
    AU2016251610A| AU2016251610B2|2015-04-23|2016-04-21|Threaded tubular element provided with a metallic anti-corrosion and anti-galling coating|
    MX2017013530A| MX2017013530A|2015-04-23|2016-04-21|Threaded tubular element provided with a metallic anti-corrosion and anti-galling coating.|
    ARP160101094A| AR104335A1|2015-04-23|2016-04-21|TUBULAR THREAD ELEMENT PROVIDED WITH AN ANTI-CORROSION AND ANTIAGARROTING METALLIC COATING|
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