Patents by Inventor Didier David
Didier David 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: 10816628Abstract: A method for producing an MRI image includes the steps of acquiring lines of a volume under analysis using a steady-state gradient echo sequence in successive repetition times (TR); and applying an inhomogeneous magnetization transfer (ihMT) pre-saturation module (TMT) in each repetition time. The duration of the repetition times is greater than 20 milliseconds.Type: GrantFiled: March 23, 2017Date of Patent: October 27, 2020Assignees: UNIVERSITE D'AIX-MARSEILLE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Olivier Maciej Girard, Guillaume Didier David Duhamel, Samira Mchinda, Valentin Hugo Jonas Prevost
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Abutment for a tubular component overlaid with a metallic composite deposit and method for making it
Patent number: 10655228Abstract: The invention concerns an abutment for a tubular component, said abutment being overlaid with a coating comprising a principal layer constituted by an alloy selected from nickel-phosphorus alloys, copper-nickel alloys and nickel-tungsten alloys. The invention also concerns a tubular component comprising said abutment and a method for producing such an abutment.Type: GrantFiled: September 11, 2014Date of Patent: May 19, 2020Assignee: VALLOUREC OIL AND GAS FRANCEInventors: Cecile Millet, Didier David -
Publication number: 20190137588Abstract: A method for producing an MRI image includes the steps of acquiring lines of a volume under analysis using a steady-state gradient echo sequence in successive repetition times (TR); and applying an inhomogeneous magnetization transfer (ihMT) pre-saturation module (TMT) in each repetition time. The duration of the repetition times is greater than 20 milliseconds.Type: ApplicationFiled: March 23, 2017Publication date: May 9, 2019Applicants: UNIVERSITE D'AIX-MARSEILLE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Olivier Maciej GIRARD, Guillaume Didier David DUHAMEL, Samira MCHINDA, Valentin Hugo Jonas PREVOST
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Publication number: 20190099106Abstract: A method for producing an MRI image, including acquiring multiple intermediate images of a subject under analysis using alternating preparation phases; synchronizing the acquisitions with a physiological variable of the subject; forming a first and a second set of intermediate images resulting from distinct preparation phases; assigning to each intermediate image a timestamp based on the time elapsed between the acquisition time of the current intermediate image and the previous intermediate image; matching intermediate images of the first set with respective intermediate images of the second set based on their timestamps being equal within a tolerance margin; producing a first candidate output image based on a function of the matched intermediate images; increasing the tolerance margin by an increment; reiterating the matching step to produce a further candidate output image; and selecting as an output image a candidate image based on the signal-to-noise ratio of the candidate image.Type: ApplicationFiled: February 27, 2017Publication date: April 4, 2019Applicants: UNIVERSITE D'AIX-MARSEILLE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Olivier Maciej GIRARD, Guillaume Didier David DUHAMEL, Virginie CALLOT
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Publication number: 20170370162Abstract: A tubular drill stem component including an end element having an axis of revolution and including a threading extending about the axis of revolution, the end element configured to be connected by makeup onto a corresponding end element of another tubular component including a complementary threading, the end element including at least one outer abutment configured to come into contact with a corresponding outer abutment of the other component at an end of makeup, and wherein the outer abutment includes at least one helical surface having an axis of the helix that coincides with the axis of revolution.Type: ApplicationFiled: December 8, 2015Publication date: December 28, 2017Applicant: VALLOUREC OIL AND GAS FRANCEInventors: Fabien CARROIS, Didier DAVID
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Patent number: 9500043Abstract: A threaded tubular connection includes a first body terminated by an external abutment, and linked to a male threading prolonged by a terminal portion forming an internal abutment surface at its axial end, such that the connection includes a second body defining a bearing surface for the external abutment at one free end, and including an initial portion on its internal surface connecting the bearing surface to a female threading, made up onto the male threading, and terminating in an internal shoulder facing the internal abutment, such that the linking profile between one of the following: the external abutment, the internal abutment, the bearing surface, and/or the internal shoulder, has a profile with a variable diameter in cross section, over a length of the body which is less than the terminal portion or initial portion.Type: GrantFiled: December 20, 2012Date of Patent: November 22, 2016Assignee: VALLOUREC OIL AND GAS FRANCEInventors: Didier David, Fabien Carrois
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ABUTMENT FOR A TUBULAR COMPONENT OVERLAID WITH A METALLIC COMPOSITE DEPOSIT AND METHOD FOR MAKING IT
Publication number: 20160244883Abstract: The invention concerns an abutment for a tubular component, said abutment being overlaid with a coating comprising a principal layer constituted by an alloy selected from nickel-phosphorus alloys, copper-nickel alloys and nickel-tungsten alloys. The invention also concerns a tubular component comprising said abutment and a method for producing such an abutment.Type: ApplicationFiled: September 11, 2014Publication date: August 25, 2016Applicant: VALLOUREC OIL AND GAS FRANCEInventors: Cecile MILLET, Didier DAVID -
Patent number: 9291004Abstract: Tubular drill string component for drilling a hole with circulation of a drilling fluid around the component and in a direction going from a drill hole bottom to the surface. The component includes a first end including a female threading, a second end including a male threading, and a substantially tubular central zone. The component includes a communication tube arranged at least in the central zone and in contact with a bore of the central zone. A signal transmission cable is arranged in the tube. The communication tube includes a body formed from at least one metal strip arranged with an annular component. The body includes, in section along a plane passing through the axis of the tube, at least two axially elongated lengths, partially overlapping one another with an axial play selected to accommodate the maximum elastic deformation of the component under axial compressive and/or bending stress.Type: GrantFiled: January 4, 2010Date of Patent: March 22, 2016Assignee: VALLOUREC DRILLING PRODUCTS FRANCEInventors: Didier David, Gérard Leveau, Gabriel Roussie
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Patent number: 9200486Abstract: A drill string element including a main pipe with connection ends and a protective mechanism for at least one wire. The protective mechanism extends within a central bore of the main pipe. The main pipe presents a first hole in one of the connection ends and a second hole in the other connection end, both holes communicating with the central bore. The protective mechanism includes a guide tube arranged for housing the wire, both ends of which being respectively disposed within the first hole and the second hole. A retaining mechanism is arranged in at least one of the first hole and the second hole for the respective end of the guide tube. The retaining mechanism is configured to prevent the respective end of the guide tube from moving relative to the one of the first hole and the second hole according to at least one longitudinal direction of the hole.Type: GrantFiled: March 4, 2010Date of Patent: December 1, 2015Assignee: VALLOUREC DRILLING PRODUCTS FRANCEInventors: Gérard Leveau, Gabriel Roussie, Didier David
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Publication number: 20140367119Abstract: A threaded tubular connection includes a first body terminated by an external abutment, and linked to a male threading prolonged by a terminal portion forming an internal abutment surface at its axial end, such that the connection includes a second body defining a bearing surface for the external abutment at one free end, and including an initial portion on its internal surface connecting the bearing surface to a female threading, made up onto the male threading, and terminating in an internal shoulder facing the internal abutment, such that the linking profile between one of the following: the external abutment, the internal abutment, the bearing surface, and/or the internal shoulder, has a profile with a variable diameter in cross section, over a length of the body which is less than the terminal portion or initial portion.Type: ApplicationFiled: December 20, 2012Publication date: December 18, 2014Applicant: VALLOUREC OIL AND GAS FRANCEInventors: Didier David, Fabien Carrois
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Publication number: 20120306199Abstract: The invention concerns a tubular component (2) for the exploration or operation of a hydrocarbon well, comprising a pipe body (24) with an axis of revolution (20) extended at at least one of its ends (25) by a first tool joint (23) provided with a threaded end that can connect the tubular component (2) to another tubular component by makeup, the first tool joint (23) being friction welded to said end (25) of the pipe body (24) in order to define a first weld zone (21), characterized in that the circumferential surface of the tubular component comprises an annular groove (22) extending in the region of the first weld zone.Type: ApplicationFiled: May 30, 2012Publication date: December 6, 2012Applicant: VAM DRILLING FRANCEInventor: Didier DAVID
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Publication number: 20120111555Abstract: A drill string element including a main pipe with connection ends and a protective mechanism for at least one wire. The protective mechanism extends within a central bore of the main pipe. The main pipe presents a first hole in one of the connection ends and a second hole in the other connection end, both holes communicating with the central bore. The protective mechanism includes a guide tube arranged for housing the wire, both ends of which being respectively disposed within the first hole and the second hole. A retaining mechanism is arranged in at least one of the first hole and the second hole for the respective end of the guide tube. The retaining mechanism is configured to prevent the respective end of the guide tube from moving relative to the one of the first hole and the second hole according to at least one longitudinal direction of the hole.Type: ApplicationFiled: March 4, 2010Publication date: May 10, 2012Applicant: VAM DRILLING FRANCEInventors: Gerard Leveau, Gabriel Roussie, Didier David
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Publication number: 20110290475Abstract: Tubular drill string component for drilling a hole with circulation of a drilling fluid around said component and in a direction going from a drill hole bottom to the surface. The component includes a first end including a female threading, a second end including a male threading, and a substantially tubular central zone. The component includes a communication tube arranged at least in the central zone and in contact with a bore of the central zone. A signal transmission cable is arranged in the tube. The communication tube includes a body formed from at least one metal strip arranged with an annular component. The body includes, in section along a plane passing through the axis of the tube, at least two axially elongated lengths, partially overlapping one another with an axial play selected to accommodate the maximum elastic deformation of the component under axial compressive and/or bending stress.Type: ApplicationFiled: January 4, 2010Publication date: December 1, 2011Applicant: VAM DRILLING FRANCEInventors: Didier David, Gérard Leveau, Gabriel Roussie
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Patent number: 7647839Abstract: 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 diameter of at least a first portion of the packer so as to apply the packer against an internal surface of the sample at the test zone, ii) a second pressure mechanism exerting a first selected internal pressure over a portion of the internal surface located at a second portion of the packer, and/or iii) a third pressure mechanism to cooperate with at least one plug member attached to the sample at a distance from one end of the packer to define a zone of action, to exert on the sample a second selected internal pressure at the zone of action.Type: GrantFiled: February 23, 2006Date of Patent: January 19, 2010Assignee: Vallourec Mannesmann Oil & Gas FranceInventors: Didier David, Thierry Noel, Gabriel Roussie
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Publication number: 20080264632Abstract: A unit is dedicated to mechanically loading a tubular sample (ET). It comprises at least one packer (P) housed in the sample (ET) at a test zone (ZT), having a longitudinal extension which is greater than that of said test zone (ZT) and comprising i) first pressure means (C1) instructed to cause local variation in the diameter of at least a first portion of the packer (P) so as to apply it against an internal surface of the sample (ET) at the test zone (ZT), ii) second pressure means (C2) charged with exerting a first selected internal pressure over a portion of the internal surface located at a second portion of the packer (P), and/or iii) third pressure means (C3) instructed to cooperate with at least one plug member (B1, B2) attached to the sample at a distance from one end of the packer (P) to define a zone of action (ZA), so as to exert on the sample (ET) a second selected internal pressure at the zone of action (ZA).Type: ApplicationFiled: February 23, 2006Publication date: October 30, 2008Applicant: Vallourec Mannesmann Oil & Gas FranceInventors: Didier David, Thierry Noel, Gabriel Roussie