TENARIS CONNECTIONS AG Patent applications |
Patent application number | Title | Published |
20120104751 | TUBULAR JOINT HAVING WEDGE THREADS WITH SURFACE COATING - A threaded joint for pipes includes a pin member and a box member, the pin member having an external thread configured to correspond to an internal thread of the box member, a thread form of the internal and external threads having generally dovetail-shaped profile with stab flanks and load flanks and flat roots and crests, wherein the internal threads are increasing in width in one direction on the box and the external threads are increasing in width in the other direction on the pin, so the roots, crests, and flanks of the threads move together and form seals that resist the flow of fluids between the seals. The threaded joint further includes a fluoropolymer-based coating applied to specific regions of the internal and external threads and a resin coating disposed in regions of the internal and external threads that are devoid of the fluoropolymer-based coating, wherein the fluoropolymer-based coating and the resin coating are configured to form a layer of substantially uniform thickness on the overall surface of the internal and external threads. | 05-03-2012 |
20110084483 | TUBULAR JOINT HAVING WEDGE THREADS WITH SURFACE COATING - A threaded joint for pipes includes a pin member and a box member, the pin member having an external thread configured to correspond to an internal thread of the box member, a thread form of the internal and external threads having generally dovetail-shaped profile with stab flanks and load flanks and flat roots and crests, wherein the internal threads are increasing in width in one direction on the box and the external threads are increasing in width in the other direction on the pin, so the roots, crests, and flanks of the threads move together and form seals that resist the flow of fluids between the seals. The threaded joint further includes a fluoropolymer-based coating applied to specific regions of the internal and external threads and a resin coating disposed in regions of the internal and external threads that are devoid of the fluoropolymer-based coating, wherein the fluoropolymer-based coating and the resin coating are configured to form a layer of substantially uniform thickness on the overall surface of the internal and external threads. | 04-14-2011 |
20110042946 | THREADED JOINT WITH HIGH RADIAL LOADS AND DIFFERENTIALLY TREATED SURFACES - A threaded joint has an interference between thread roots of pin and thread crests of the box of value comprised between 1% and 5% of the average thickness of the connection, and a root to load flank radius R comprised in the range of 0.2 mm and 0.4 mm and a surface treatment comprising shot peening applied to the beginning and end of the threaded zone of the pin. In other embodiments the interference can be between thread roots of box and thread crests of the pin. | 02-24-2011 |
20110041581 | METHOD FOR IMPROVING FATIGUE RESISTANCE OF A THREADED JOINT - A make-up method for a threaded joint with a pin and a box to increase the fatigue life of the joint is provided. The method includes the step of applying a torque for making up the pin in the box until first and second abutment shoulders of the pin and the box abut. The method can also include the step of applying an additional torque to the threaded joint until a magnitude of between 50% and 90% of the yield strength of the joint material in the most stressed part of the joint is reached. | 02-24-2011 |
20100187808 | THREADED JOINT WITH PRESSURIZABLE SEAL - A threaded joint comprises a pin coupled to a box with an annular groove, one or a pair of seal rings, and hydraulic actuating means to pressurize the seal ring or rings against the pin to provide improved scalability of the joint. The seal ring or rings comprise a frustoconical surface, an external surface, and an internal surface with one or more protruding annular ribs. In the unpressurized state, the seal ring or rings do not protrude from the groove. In the pressurized state, the frustoconical surface of the sealing ring is in sealing contact with an internal surface of the annular groove of the box, and the annular ribs of the sealing ring are in sealing contact with the external surface of the pin. | 07-29-2010 |
20100181761 | THREADED JOINT WITH RESILIENT SEAL RING - A threaded joint comprises a seal ring positioned between a pin and a box, and located in a groove between the end of a threaded section and the nose of the box. The seal ring has a first base, a second base axially opposite to the first base, at least two protruding annular ribs on the external surface, and an internal surface comprising, in an unloaded position, two frustoconical annular surfaces tapering towards the center of the seal ring and joined by a fillet. | 07-22-2010 |
20100181727 | THREADED JOINT WITH ENERGIZABLE SEAL - A threaded joint has a sealing ring radially positioned between a pin and a box and axially positioned on a portion of the pin on an opposite side of the threads of the pin from the nose of the pin. The sealing ring has two protruding annular lips positioned at a skewed angle to the longitudinal axis, two or more radial annular ribs on an external surface, an internal surface, and an at least partly embedded reinforcement ring. When the joint is made up, the sealing ring is in sealing contact with an annular groove of the box by the annular ribs and in sealing contact with the pin by the internal surface. The internal surface of the sealing ring can have a uniform diameter or have radially protruding annular ribs. | 07-22-2010 |
20100155250 | SYNTHESIS OF OIL CONTAINING MICROCAPSULES AND THEIR USE IN FUNCTIONAL COMPOSITE COATINGS - Systems and methods for the synthesis of lubricant-containing microcapsules are disclosed. Embodiments of composite nickel and copper coatings containing capsules with liquid lubricating oil cores are also disclosed. In certain embodiments, microcapsules can be incorporated into a metal plating solution to perform composite electrodeposition to obtain self lubricant metallic coatings. In some embodiments, much lower friction coefficient (˜0.8) and far better wear resistance was obtained with the copper/microcapsules composite. | 06-24-2010 |
20100068549 | SEAMLESS PRECISION STEEL TUBES WITH IMPROVED ISOTROPIC TOUGHNESS AT LOW TEMPERATURE FOR HYDRAULIC CYLINDERS AND PROCESS FOR OBTAINING THE SAME - Process for manufacturing seamless precision steel tubes with improved isotropic toughness at low temperature for hydraulic cylinders comprising the following steps; —(i) providing a steel having a composition comprising 0.06-0.15% by weight of carbon, 0.30-2.5% by weight of Mn, and 0.10-0.60% by weight of Si, —(ii) hot-rolling the said steel at a temperature higher than Ac3 such as to obtain a seamless steel tube, —(iii) heating the said seamless steel tube at a temperature in the range between Ac1 and Ac3, —(iv) quenching the said heated seamless steel tube, such as to establish a dual (or multi-) phase microstructure in the steel employed, composed of ferrite and martensite and optionally bainite and/or retained austenite, —(v) cold drawing the quenched seamless steel tube such as to provide a seamless precision steel tube of the desired dimensions, —(vi) subjecting the so-obtained seamless precision steel tube to stress relieving treatment to improve its isotropic toughness, and optionally —(vii) straightening the so-obtained seamless precision steel tube with improved toughness. | 03-18-2010 |
20090181240 | DIAZONIUM FUNCTIONALIZED NANOPARTICLES AND METHODS FOR BINDING NANOPARTICLES TO METALLIC SURFACES - In one embodiment, a functionalized particle includes a n inorganic particle with diazonium functional group attached. In some embodiments, the largest dimension of the inorganic particle ranges between about 10 nm and 1000 μm. In another embodiment, a substrate with a hydrophobic surface includes a substrate, and a first plurality of inorganic particles with at least one diazonium functional group attached to the substrate. The largest dimension of the first plurality of inorganic particles ranges between about 10 nm and 1000 μm. One embodiment includes a second plurality of particles with at least one phenol functional group attached to the inorganic particle. In a further embodiment, a fluorinated functional group is attached to the second plurality of particles. In some embodiments, the material has a hydrophobic surface with a water contact angle greater than about 150°. | 07-16-2009 |
20090101242 | LOW CARBON ALLOY STEEL TUBE HAVING ULTRA HIGH STRENGTH AND EXCELLENT TOUGHNESS AT LOW TEMPERATURE AND METHOD OF MANUFACTURING THE SAME - A low carbon alloy steel tube and a method of manufacturing the same, especially for a stored gas inflator pressure vessel, in which the steel tube consists essentially of, by weight: about 0.06% to about 0.18% carbon, about 0.3% to about 1.5% manganese, about 0.05% to about 0.5% silicon, up to about 0.015% sulfur, up to about 0.025% phosphorous, and at least one of the following elements: up to about 0.30% vanadium, upto t about 0.10% aluminum, up to about 0.06% niobium, up to about 1% chromium, up to about 0.70 % nickel, up to about 0.70% molybdenum, up to about 0.35% copper, up to about 0.15% residual elements, and the balance iron and incidental impurities. After a high heating rate of about 100° C. per second; rapidly and fully quenching the steel tubing in a water-based quenching solution at a cooling rate of about 100° C. per second. The steel has a tensile strength of at least about 145 ksi and as high as 220 ksi and exhibits ductile behavior at temperatures as low as −100° C. | 04-23-2009 |
20090033087 | THREADED CONNECTIONS WITH HIGH AND LOW FRICTION COATINGS - A threaded metallic joint has the thread surface of pin ( | 02-05-2009 |
20080303274 | HIGH-STRENGTH THREADED JOINTS, PARTICULARLY FOR LINED TUBES - A threaded tubular joint comprising male and female members is provided. The ends of the male members comprise an upper portion and a lower portion located between an upper threaded portion and an inner surface of each of the male ends. The upper portion is formed by a thread bevel which transitions into a first rounded area and the lower portion is formed by a second rounded area. A reversibly deformable ring may be housed in about the center of the joint. When the male members are substantially engaged within the joint, the ring is compressed by the ends of the male members. This configuration provides geometric continuity within the inner surface of the joint, and the corrosion protection barrier of the inner lining of the tube. Beneficially, embodiments of the joint possess an improved capability to receive inner linings as compared with previously developed threaded joints | 12-11-2008 |