Vallourec & Mannesmann Oil & Gas France

Sumitomo Metal Industries, Inc.

Nippon Steel & Sumitomo Metal Corporation

Vallourec Oil and Gas France

Olivier Tartar

Claire Patureau

Eric Verger

Laurent Gillot

A threaded tubular connection that is leak-proof for internal and external successive pressure loads including a male element and a female element. At least one of the male or female elements includes a lip between the threading and the free end of the element. The lip includes a first zone with a peripheral surface turned towards the other element on which a first metallic sealing surface is disposed that can be radially interference fitted against a corresponding second metallic sealing surface disposed on the other element. The lip includes a second zone located axially between the first zone and the corresponding threading. The radial stiffness of the second zone is less than that of the first zone and that of a third zone adjacent to the second zone in the direction of the threading, and the second zone can be radially deformed by a pressure exerted thereon.

Threaded tubular connection which is leak-proof under internal and external successive pressure loads

A sealed threaded connection with a male end and a female end, the male end having a sealing surface and finishing in a terminal surface orientated transversely to the axis of the connection. The female end has a threaded zones inclined in accordance with a conical generatrix forming an angle of taper alpha; with the axis of the connection, sealing surface being cooperating with the sealing surface of the male end along a radially interfering contact zone, and finishing in a terminal surface which is transversely orientated, the tangent at the contact zone of the sealing surface being inclined along a line forming an angle beta; with the axis of the threaded connection, wherein the inclination defined by the conical generatrix relative to the threaded zones is in a direction opposite to the inclination defined by the tangent at the contact zone of the sealing surface.

Sealed tubular connection used in the oil industry

A threaded element of a component includes at least first and second threading portions each including threads each including a stabbing flank and a loading flank. The stabbing flanks and loading flanks of the threads of the first threading portion and the threads of the second threading portion are inclined in an opposed manner with respect to the radial direction.

Growing community of inventors

Paris, France

Olivier Tartar