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| Number | Title | Issue Date |
| 8151461 | Method for producing a threaded tubular connection sealed by radial expansion To produce a sealing contact between male and female threaded elements, a contact zone is provided, located between male and female threading portions separated from each other in an axial direction. The male and female elements have respective cylindrical portions ... | 04/10/2012 |
| 8146960 | Two hermetic threaded tubular joints An assembly including two symmetrically-disposed expandable threaded tubular joints. The joints including a male tubular element at one end of a tube and equipped with a male thread, a first annular lip having a first axially abutting surface, a first inner surface ... | 04/03/2012 |
| 8146959 | Fatigue resistant pipe string component A pipe string component that connects an offshore platform with a sea bed is provided. The pipe string component includes a threaded tubular connection. The threaded tubular connection includes a male tubular element including a tapered male threading, and a female ... | 04/03/2012 |
| 8113055 | Method for evaluating fastening state of threaded joint of pipes or tubes and method for fastening threaded joint of pipes or tubes using the method There is provided a method capable of evaluating a fastening state of a threaded joint that is used as a joint of pipes or tubes such as OCTG with a high degree of accuracy even after being fastened and a method for fastening a threaded joint of pipes or tubes using... | 02/14/2012 |
| 8091425 | Ultrasonic testing method of threaded joint of pipes or tubes An ultrasonic testing method relates to a threaded joint of pipes including a pin having an external thread part, a metal seal part, and a shoulder part on an outer peripheral surface, and a box having an internal thread part, a metal seal part, and a shoulder part ... | 01/10/2012 |
| 8042842 | Production by plastic expansion of a sealed tubular joint with inclined abutting surface(s) A tubular joint, with a first male tubular element, with a male thread, a first annular lip, with a first axial abutting surface, a first internal surface, a section of a first external surface, a second abutting surface and a second female tubular element, with a f... | 10/25/2011 |
| 8038179 | Threaded joint for steel pipes A threaded joint for steel pipes comprising a pin 1 having a tapered male thread 11, a tapered sealing surface 13, and an end shoulder surface 14 and a box 2 having correspondingly a tapered female thread 21, a tapered seali... | 10/18/2011 |
| 7997627 | Threaded joint for steel pipes A threaded joint for steel pipes comprises a pin (1) and a box (2). The pin has male thread (11), a sealing surface (13), and a shoulder surface (14) located on the end face of the pin. Correspondingly, the box has female thread ( | 08/16/2011 |
| 7997120 | Method for pressure testing a threaded component A method for pressure testing a threaded component is provided. A cap includes a female threading that is matched with a threading of a first male threaded element. The cap is made up onto the first male threaded element of a component to be tested so as to compress... | 08/16/2011 |
| 7931311 | Sealed tubular joint comprising local and initial added thickness(es) by means of plastic expansion An expandable tubular joint including a male element with a male thread, a first annular lip having a first axially abutting surface, a first inner surface and a first outer surface, and a second abutting surface; and a female element with a female thread, a second ... | 04/26/2011 |
| 7883120 | Male element for a sealed threaded tubular connection A male element for a sealed threaded tubular connection. Before tapered reduction swaging of an end region of a tube and machining in the region of a tapered male threading and a male lip to obtain a male tubular element for makeup into a female tubular element to f... | 02/08/2011 |
| 7883118 | Threaded joint for steel pipes 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 contac... | 02/08/2011 |
| 7845687 | Resistance to fatigue of a threaded tubular connection A method to improve fatigue resistance of a threaded tubular connection. Radial interference between a male and female threading operates between stabbing flanks inclined at about 27° with respect to an axis of the threadings, wherein mutual contacting surfaces are... | 12/07/2010 |
| 7874054 | Method for producing tubular component provided with mutually oriented threaded elements A method for producing a tubular component, in which, after machining successively respective threaded elements at both ends of the tubular component, a second orientation gauge is screwed onto the second threaded element to check whether a mark on the gauge comes i... | 01/25/2011 |
| 7770935 | Threaded joint for steel pipes 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 c... | 08/10/2010 |
| 7740285 | Threaded joint for steel pipes A threaded joint for steel pipes comprised of a pin (1) and a box (2) each having a threaded portion (1a, 2b) and an unthreaded contact portion (1b, 2a) exhibits adequate leakage resistance and ga... | 06/22/2010 |
| 7661728 | Threaded tubular connection with progressive axial thread interference A threaded connection includes at least one contact zone axially separated from threadings in which male and female elements are in sealed contact via bearing surfaces respectively constituted by a cambered surface and by a tapered surface. ... | 02/16/2010 |
| 7661727 | Threaded tubular connection which is resistant to bending stresses A threaded tubular connection includes a male tubular element including a male threaded portion and a female tubular element including a female threaded portion that cooperates by screwing with the male threaded portion. The threaded connection includes at least one... | 02/16/2010 |
| 7647839 | Installation and method for testing system of loads of a sample using a packer A unit dedicated to mechanically loading a tubular sample. At least one packer is housed in a sample at a test zone, having a longitudinal extension greater than that of the test zone and including i) a first pressure mechanism to cause local variation in the diamet... | 01/19/2010 |
| 7581766 | Reinforced tubular joint for improved sealing-tightness after plastic expansion The invention relates to a high-performance threaded tubular joint comprising a first, male tubular element (11) and a second, female tubular element (12) made up together by screwing. One of the tubular elements (11; 12) has a non-threaded lip ... | 09/01/2009 |
| 7513534 | Fatigue-resistant threaded component for a tubular threaded joint A fatigue-resistant threaded element for a threaded tubular connection. A portion of threads of the threaded element have a helical groove opening into the threaded crest. A groove is formed in all or a portion of the threads of one or both end zones, namely the fir... | 04/07/2009 |
| 7494159 | Threaded joint for steel pipes In a threaded joint for steel pipes which are connected by threaded engagement of a pin member having a tapered male thread, a metal seal-forming portion, and a torque shoulder-forming portion on the end of a pipe, and a box member having a tapered female thread, a ... | 02/24/2009 |
| 7475476 | Method for producing a threaded tubular connection sealed to the outside In a threaded connection with tapered male and female threads, an annular housing is provided in the vicinity of the free end of the female element, which housing receives a portion of a deformable sealing ring, which is radially compressed, while a retaining lip of... | 01/13/2009 |
| 7360798 | Threaded joint for steel pipes A threaded joint for steel pipes comprising a pin 1 and a box 2 each having a contact surface comprising a threaded portion 3 or 4 and an unthreaded metal contact portion 8 is provided with improved anti-galling propertied by formi... | 04/22/2008 |
| 7334821 | Premium threaded tubular joint comprising at least a threaded element with end lip A premium threaded tubular connection including, on at least one threaded element, a distal abutment surface at the free end of a threaded element, and a lip sealing surface at a given distance from the threading. The lip includes an appendix that extends the lip to... | 02/26/2008 |
| 7331614 | Tubular threaded joint with trapezoid threads having convex bulged thread surface A threaded tubular connection includes two elements, male and female, made up one into the other to a given torque in which, prior to making up, at least one thread face under contact pressure has a convexly rounded shape that is continuous over its width with a rad... | 02/19/2008 |
| 6957834 | Threaded joint for pipes A threaded joint which economically imparts effective sealing properties to a metal-to-metal seal portion and which can prevent seizing at the time of make-up comprises a steel pipe 1 having at its tip a male thread 1b and an unthreaded sealing ... | 10/25/2005 |
| 6933264 | Threaded component for seizure-resistant tubular threaded joint The invention concerns a threaded component for a seizure-resistant tubular threaded joint wherein a lubricating substance is deposited in a thin film on at least the surface of the threads of the threading, said surface being treated to adsorb said lubricating subs... | 08/23/2005 |
| 6877202 | Method of manufacturing a threaded joint for oil well pipes A method of manufacturing a threaded joint for oil well pipe having a pin part with a male thread, a box part with a female thread, metal seal parts provided on the pin part and the box part, respectively, and torque shoulder parts provided at the tip of the pin par... | 04/12/2005 |
| 6869111 | Lubricating coating composition suitable for lubrication of a threaded joint A lubricating coating composition in which at least one basic lubricant selected from a basic sulfonate, a basic salicylate, and a basic phenate is dissolved in a volatile solvent is applied to the frictional surface of a box and a pin constituting a threaded joint ... | 03/22/2005 |
| 6789823 | Tubular threaded joint with reinforced stop A male threaded joint tipped with a male lip having a male seating face and a male stop transverse surface proximate to the male seating face. A female threaded element includes for co-operation with the corresponding male threaded element, a female seating face and... | 09/14/2004 |
| 6755444 | Slim-type threaded joint for oil well pipes A threaded joint for oil well pipes is provided which can guarantee a joint efficiency sufficient for practical use in deep wells, which has a decreased joint outer diameter, and which has an improved bending resistance, compression resistance, and over-torque resis... | 06/29/2004 |
| 6752436 | Fatigue-resistant threaded bevelled tubular element A fatigue resistant waisted threaded tubular element for threaded tubular connection, and resulting threaded tubular connection. The threaded tubular element is waisted by a groove formed in the material beneath the threading to reduce the stiffness of the wall at t... | 06/22/2004 |
| 6729658 | Threaded tubular element for fatigue resistant threaded tubular joint and resulting threaded tubular joint The threading of a threaded tubular element includes at least one tangential multiple radius junction zone at the thread root, in particular on the load flank side. This zone include a principal arc with a radius where the support circle cuts the flank at a point. T... | 05/04/2004 |
| 6712401 | Tubular threaded joint capable of being subjected to diametral expansion A threaded joint to be expanded, including a lip at the end of the male element end a housing for the lip on the female element to make the threaded joint capable of being sealed and of having a maximum internal passage cross-section after being subjected to diametr... | 03/30/2004 |
| 6543816 | Threaded tubular joint proof to external pressure A threaded pipe connector which may find application in the petroleum and gas industry, and pipe connections formed with the connector. The connector includes a male element disposed at the end of a first pipe and a female element disposed at the end of a... | 04/08/2003 |
| 6502041 | Method for controlling taper pipe thread and corresponding control devices A method for the inspection of male or female tapered threads located at the extremities of metal pipes. The pitch diameter of the threads in a measuring plane located substantially in the middle of a zone of perfect threads is inspected using a plane dia... | 12/31/2002 |
| 6481760 | Threaded connection of two metal tubes with groove in the threading A threaded connection for two metal pipes including a male element at the end of a first pipe and a female element at the end of a second pipe, the male element including a male external thread, the female element including a female internal thread. The m... | 11/19/2002 |
| 6412831 | Threaded connection of two metal tubes with high tightening torque A threaded connection for two metal pipes which includes a tapered male thread with trapezoidal threads on a male element and a mating female thread on a female element. The thread width of the male and female threads, at the thread crest, is less than th... | 07/02/2002 |
| 6349979 | Integral threaded assembly of two metal tubes An integral threaded connection of two metal tubes includes a male element and a female element, each of the elements including a bearing surface, a tapered threading, a sealing surface, and an end surface. The end and bearing surfaces are flat and perpen... | 02/26/2002 |
