Patents by Inventor Ryuichi Imai
Ryuichi Imai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10626345Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.Type: GrantFiled: November 2, 2015Date of Patent: April 21, 2020Assignees: NIPPON STEEL CORPORATION, VALLOUREC MANNESMANN OIL & GAS FRANCEInventors: Kunio Goto, Takayuki Kamimura, Masaru Takahashi, Keishi Matsumoto, Michihiko Iwamoto, Ryuichi Imai, Stephanie Rai
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Publication number: 20160230119Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.Type: ApplicationFiled: November 2, 2015Publication date: August 11, 2016Inventors: Kunio GOTO, Takayuki KAMIMURA, Masaru TAKAHASHI, Keishi MATSUMOTO, Michihiko IWAMOTO, Ryuichi IMAI, Stephanie RAI
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Patent number: 9321982Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.Type: GrantFiled: June 4, 2010Date of Patent: April 26, 2016Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOUREC MANNESMANN OIL & GAS FRANCEInventors: Kunio Goto, Takayuki Kamimura, Masaru Takahashi, Keishi Matsumoto, Michihiko Iwamoto, Ryuichi Imai, Stéphanie Raï
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Patent number: 8741406Abstract: A threaded joint for steel pipes for use in an oil well which has improved galling resistance and which is protected from rusting comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion. The contact surface of at least one of the pin and the box has a lower layer of a viscous liquid or semisolid lubricating coating comprising at least wax and a fatty acid alkaline earth metal salt and not containing a harmful heavy metal such as lead and an upper layer of a dry solid coating formed from an aqueous resin coating composition, an organic solvent type coating composition, or an ultraviolet curing coating composition.Type: GrantFiled: March 17, 2011Date of Patent: June 3, 2014Assignees: Nippon Steel & Sumitomo Metal Corporation, Vallourec Mannesmann Oil & Gas FranceInventors: Kunio Goto, Ryuichi Imai
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Patent number: 8586644Abstract: A thin and highly transparent coating having excellent air tightness, adhesion to a substrate, lubricating properties, galling resistance, and corrosion resistance is formed on the surface of a metal substrate and particularly on the surface of a threaded joint which is used for connection of oil country tubular goods. A photocurable composition comprising (A) a photocurable (meth)acrylate resin, (B) a (meth)acrylate monomer selected from a monofunctional (meth)acrylate monomer and a difunctional (meth)acrylate monomer, (C) a trifunctional or higher multifunctional (meth)acrylate monomer, (D) a photopolymerization initiator, (E) a benzotriazole anticorrosive agent, (F) an anticorrosive pigment selected from a phosphate anticorrosive pigment and calcium ion-exchanged silica, and (G) a phosphate ester is used to form a photocured coating.Type: GrantFiled: November 14, 2011Date of Patent: November 19, 2013Assignees: Nippon Steel & Sumitomo Metal Corporation, Vallourec Mannesmann Oil & Gas France, Chugoku Marine Paints, Ltd.Inventors: Tomomitsu Nagareo, Yoshinori Kameda, Keishi Matsumoto, Takayuki Kamimura, Masaru Takahashi, Kunio Goto, Ryuichi Imai
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Patent number: 8420581Abstract: A lubricating coating which is free from harmful heavy metals is formed on a premium threaded joint for pipes constituted by a pin and a box each having a contact surface comprising a threaded portion and an unthreaded metal contact portion (a sealing surface and shoulder) in order to provide the joint with galling resistance, gas-tightness, and anticorrosive properties such that the unthreaded metal contact portion is prevented from yielding even when the joint is made up with a high torque. The lubricating coating comprises one or both of a rosin and calcium fluoride; metal soap; wax; and a basic metal salt of an aromatic organic acid, and preferably it further includes a lubricating powder, magnesium carbonate, and/or a carbohydrate, particularly a cyclodextrin.Type: GrantFiled: April 30, 2010Date of Patent: April 16, 2013Assignees: Nippon Steel & Sumitomo Metal Corporation, Vallourec Mannesmann Oil & Gas FranceInventors: Kunio Goto, Ryuichi Imai, Shigeki Fukumoto, Yasuhiro Yamamoto
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Patent number: 8409718Abstract: A threaded joint for steel pipes for use in an oil well which has galling resistance and which is protected from rusting comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion. The contact surface of at least one of the pin and the box has a lower layer of a viscous liquid or semisolid lubricating coating comprising at least wax and a fatty acid alkaline earth metal salt and not containing a harmful heavy metal such as lead and an upper layer of a dry solid coating formed from an aqueous resin coating composition, an organic solvent type coating composition, or an ultraviolet curing coating composition.Type: GrantFiled: October 15, 2010Date of Patent: April 2, 2013Assignees: Nippon Steel & Sumitomo Metal Corporation, Vallourec Mannesmann Oil & Gas GranceInventors: Kunio Goto, Ryuichi Imai
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Patent number: 8276946Abstract: A threaded joint for steel tubes has a contact surface (30) including a threaded portion and a non-threaded metal-to-metal contact portion. The contact surface of at least one of a pin and a box of the joint is coated with a first plating layer (34) made of a Cu—Zn alloy or a Cu—Zn-M1 alloy (wherein M1 is at least one element selected from Sn, Bi, and In). An undercoat (32) of one or both of a Ni plating layer (32a) and a Cu plating layer (32b) and an overcoat of a Sn-M2 alloy plating layer (36) (wherein M2 is one or more elements selected from Bi, In, Ni, Zn, and Cu) may be formed below and above the first layer, respectively. A solid lubricating coating (38a) and a viscous liquid or semisolid lubricating coating (38b) may also be formed atop the plating layer as a lubricating coating (38).Type: GrantFiled: September 1, 2009Date of Patent: October 2, 2012Assignees: Sumitomo Metal Industries, Ltd., Vallourec Mannesmann Oil & Gas FranceInventors: Masanari Kimoto, Kunio Goto, Masaru Takahashi, Kunihiro Fukui, Shigeo Nagasaku, Ryuichi Imai, Shigeo Onishi, Hiroaki Ikegami
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Publication number: 20120112456Abstract: A thin and highly transparent coating having excellent air tightness, adhesion to a substrate, lubricating properties, galling resistance, and corrosion resistance is formed on the surface of a metal substrate and particularly on the surface of a threaded joint which is used for connection of oil country tubular goods. A photocurable composition comprising (A) a photocurable (meth)acrylate resin, (B) a (meth)acrylate monomer selected from a monofunctional (meth)acrylate monomer and a difunctional (meth)acrylate monomer, (C) a trifunctional or higher multifunctional (meth)acrylate monomer, (D) a photopolymerization initiator, (E) a benzotriazole anticorrosive agent, (F) an anticorrosive pigment selected from a phosphate anticorrosive pigment and calcium ion-exchanged silica, and (G) a phosphate ester is used to form a photocured coating.Type: ApplicationFiled: November 14, 2011Publication date: May 10, 2012Applicants: SUMITOMO METAL INDUSTRIES, LTD., CHUGOKU MARINE PAINTS, LTD., VALLOUREC MANNESMANN OIL & GAS FRANCEInventors: Tomomitsu NAGAREO, Yoshinori Kameda, Keishi Matsumoto, Takayuki Kamimura, Masaru Takahashi, Kunio Goto, Ryuichi Imai
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Publication number: 20110163538Abstract: A threaded joint for steel pipes for use in an oil well which has improved galling resistance and which is protected from rusting comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion. The contact surface of at least one of the pin and the box has a lower layer of a viscous liquid or semisolid lubricating coating comprising at least wax and a fatty acid alkaline earth metal salt and not containing a harmful heavy metal such as lead and an upper layer of a dry solid coating formed from an aqueous resin coating composition, an organic solvent type coating composition, or an ultraviolet curing coating composition.Type: ApplicationFiled: March 17, 2011Publication date: July 7, 2011Applicant: SUMITOMO METAL INDUSTRIES, LTD.Inventors: Kunio GOTO, Ryuichi Imai
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Patent number: 7883118Abstract: A threaded joint for steel pipes for use in an oil well which has enhanced galling resistance and which is protected from rusting comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion. The contact surface of at least one of the pin and the box has a lower layer of a viscous liquid or semisolid lubricating coating comprising at least wax and a fatty acid alkaline earth metal salt and not containing a harmful heavy metal such as lead and an upper layer of a dry solid coating formed from an aqueous resin coating composition, an organic solvent type coating composition, or an ultraviolet curing coating composition.Type: GrantFiled: March 28, 2006Date of Patent: February 8, 2011Assignees: Sumitomo Metal Industries, Ltd., Vallourec Mannesmann Oil & Gas FranceInventors: Kunio Goto, Ryuichi Imai
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Publication number: 20110025052Abstract: A threaded joint for steel pipes for use in an oil well which has improved galling resistance and which is protected from rusting comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion. The contact surface of at least one of the pin and the box has a lower layer of a viscous liquid or semisolid lubricating coating comprising at least wax and a fatty acid alkaline earth metal salt and not containing a harmful heavy metal such as lead and an upper layer of a dry solid coating formed from an aqueous resin coating composition, an organic solvent type coating composition, or an ultraviolet curing coating composition.Type: ApplicationFiled: October 15, 2010Publication date: February 3, 2011Applicants: SUMITOMO METAL INDUSTRIES, LTD., VALLOUREC MANNESMANN OIL & GAS FRANCEInventors: Kunio Goto, Ryuichi Imai
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Patent number: 7866706Abstract: A threaded joint for a steel pipe comprises a pin and a box with a contact surface having a threaded part and a unthreaded metal contact part, wherein a solid lubricating film containing one or more kinds of lubricating powders selected from graphite, mica, calcium carbonate and kaolin, a copper powder, and a binder is formed on at least one contact surface of the pin and the box. An object of the present invention is to provide a threaded joint for a steel pipe which allows for repeated fastening and loosening of a threaded joint without adversely influencing on a human body and environment, and is excellent in galling resistance, rust preventing property and gas tightness.Type: GrantFiled: April 5, 2005Date of Patent: January 11, 2011Assignee: Sumitomo Metal Industries, Ltd.Inventors: Kunio Goto, Ryuichi Imai, Yasuhiro Ogawa, Junichi Minami
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Publication number: 20100301600Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.Type: ApplicationFiled: June 4, 2010Publication date: December 2, 2010Inventors: Kunio Goto, Takayuki Kamimura, Masaru Takahashi, Keishi Matsumoto, Michihiko Iwamoto, Ryuichi Imai, Stephanie Rai
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Publication number: 20100264649Abstract: A lubricating coating which is free from harmful heavy metals is formed on a premium threaded joint for pipes constituted by a pin and a box each having a contact surface comprising a threaded portion and an unthreaded metal contact portion (a sealing surface and shoulder) in order to provide the joint with galling resistance, gas-tightness, and anticorrosive properties such that the unthreaded metal contact portion is prevented from yielding even when the joint is made up with a high torque. The lubricating coating comprises one or both of a rosin and calcium fluoride; metal soap; wax; and a basic metal salt of an aromatic organic acid, and preferably it further includes a lubricating powder, magnesium carbonate, and/or a carbohydrate, particularly a cyclodextrin.Type: ApplicationFiled: April 30, 2010Publication date: October 21, 2010Inventors: Kunio Goto, Ryuichi Imai, Shigeki Fukumoto, Yasuhiro Yamamoto
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Patent number: 7770935Abstract: A threaded joint for steel pipes comprises a pin (1) and a box (2) each having a threaded portion (3a or 3b) and an unthreaded metal-to-metal contact portion (4a or 4b) as contact surfaces which contact each other when the joint is fastened. The contact surfaces (3a and 4a and/or 3b and 4b) of at least one of the pin (1) and the box (2) are coated with a lower layer of a solid lubricating coating containing a solid lubricating powder (e.g., molybdenum disulfide, tungsten disulfide, or graphite) and a binder (e.g., an epoxy or other organic resin) and an upper layer of a solid corrosion protective coating formed by an organic resin which does not contain solid particles.Type: GrantFiled: January 11, 2006Date of Patent: August 10, 2010Assignees: Sumitomo Metal Industries, Ltd., Vallourec Mannesmann Oil & Gas FranceInventors: Ryuichi Imai, Kunio Goto, Kaoru Takanashi, Yasuhiro Ogawa
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Publication number: 20100059986Abstract: A pin-box type threaded joint for steel tubes having a contact surface (30) including a threaded portion and a nonthreaded metal-to-metal contact portion has improved leak resistance, galling resistance, and corrosion resistance particularly to crevice corrosion. The contact surface of at least one of the pin and the box is coated with a first plating layer (34) made of a Cu—Zn alloy or a Cu—Zn-M1 alloy (wherein M1 is at least one element selected from Sn, Bi, and In). Optionally, an undercoat (32) of one or both of a Ni plating layer (32a) and a Cu plating layer (32b) and an overcoat of a Sn-M2 alloy plating layer (36) (wherein M2 is one or more elements selected from Bi, In, Ni, Zn, and Cu) may be formed below and above the first layer, respectively. A solid lubricating coating (38a) and a viscous liquid or semisolid lubricating coating (38b) may also be formed atop the plating layer as a lubricating coating (38).Type: ApplicationFiled: September 1, 2009Publication date: March 11, 2010Inventors: Masanari Kimoto, Kunio Goto, Masaru Takahashi, Kunihiro Fukui, Shigeo Nagasaku, Ryuichi Imai, Shigeo Onishi, Hiroaki Ikegami
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Publication number: 20090264326Abstract: A tubular threaded joint for connecting tubing or casing used to excavate oil wells have a lubricating coating formed from a lubricating coating composition comprising one or more basic lubricants selected from a basic sulfonate salt, a basic salicylate salt, a basic phenate salt, and a basic carboxylate salt and having biodegradability value (BOD) of at least 20% when measured after 28 days in seawater. The joint can be used without application of a compound grease containing heavy metals even in a country or region having severe environmental regulations.Type: ApplicationFiled: April 10, 2009Publication date: October 22, 2009Inventors: Ryuichi Imai, Kunio Goto
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Publication number: 20080277925Abstract: A threaded joint for a steel pipe comprises a pin and a box with a contact surface having a threaded part and a unthreaded metal contact part, wherein a solid lubricating film containing one or more kinds of lubricating powders selected from graphite, mica, calcium carbonate and kaolin, a copper powder, and a binder is formed on at least one contact surface of the pin and the box. An object of the present invention is to provide a threaded joint for a steel pipe which allows for repeated fastening and loosening of a threaded joint without adversely influencing on a human body and environment, and is excellent in galling resistance, rust preventing property and gas tightness.Type: ApplicationFiled: April 5, 2005Publication date: November 13, 2008Applicant: SUMITOMO METAL INDUSTRIES, LTD.Inventors: Kunio Goto, Ryuichi Imai, Yasuhiro Ogawa, Junichi Minami
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Publication number: 20060228505Abstract: A threaded joint for steel pipes for use in an oil well which has improved galling resistance and which is protected from rusting comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion. The contact surface of at least one of the pin and the box has a lower layer of a viscous liquid or semisolid lubricating coating comprising at least wax and a fatty acid alkaline earth metal salt and not containing a harmful heavy metal such as lead and an upper layer of a dry solid coating formed from an aqueous resin coating composition, an organic solvent type coating composition, or an ultraviolet curing coating composition.Type: ApplicationFiled: March 28, 2006Publication date: October 12, 2006Inventors: Kunio Goto, Ryuichi Imai