Vallourec Oil and Gas France

Nippon Steel Corporation

Peugeot Citroen Automobiles Sa

Rehau Sa

Sebastien Colin

Pierre Bernard Martin

Xavier Mencaglia

Karine Ruffin

Nicolas Breziat

Sébastien Petit

Alastair Brodie

Hanae Qozam

An assembly for producing a threaded connection includes first and second tubular components with an axis of revolution and each provided at one end with at least first, second, and third continuous threaded zones provided in succession on the same helix on the outer or inner peripheral surface of the component depending on whether the threaded end is male or female. The components are capable of cooperating together upon makeup. At least one of the first, second, or third threaded zones has a variable width thread profile and is self-locking. The ends respectively finish in a free terminal surface. Each of the ends is free of a specific abutment surface. At least one sealing surface is provided between each of the adjacent threaded zones in order to cooperate in a sealed interference fit with a sealing surface provided on the corresponding end when the connection is made up.

Assembly for producing a threaded connection for drilling and operating hydrocarbon wells, and resulting threaded connection

A set for producing a threaded connection, includes first, second, third, and fourth tubular component with axis of revolution, the first tubular component including at each of its ends a first and a second threaded zone provided on the inner peripheral surface of the component, the second tubular component including at each of its ends a third and a fourth threaded zone provided on the outer peripheral surface of the component, the third tubular component including at one of its ends a fifth and a sixth threaded zone respectively provided on the inner and outer peripheral surface of the component, the fourth tubular component including at one of its ends a seventh and an eighth threaded zone respectively provided on the inner and outer peripheral surface of the component. The first and sixth, third and fifth, second and eighth, fourth and seventh threaded zones cooperate with one another on makeup.

Assembly for producing a threaded connection for drilling and operating hydrocarbon wells, and method for producing such a threaded connection

A method for monitoring a makeup state of a threaded connection including a male threaded tubular element and a female threaded tubular element. In the method, during makeup of the male threaded element into the female threaded element, a variation with time of a dimensional characteristic of at least one of the elements is measured in a pre-defined direction. Next, the variation with time of the characteristic is analyzed to determine a makeup state for the threaded connection.

Method for checking a screwing state of a tubular threaded seal

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Bantouzelle, France

Sebastien Colin