Nippon Steel & Sumitomo Metal Corporation

Vallourec Oil and Gas France

Sumitomo Metal Industries, Inc.

Vallourec & Mannesmann Oil & Gas France

Laurent Gillot

Eric Gard

Eliette Pinel

Laurent Bordet

Eric Verger

Olivier Tartar

A sealed threaded tubular connection resistant to successive pressure loads includes a male element including a male threading and a female element including a female threading corresponding to the male threading. At least one of the elements includes a lip extending beyond the threading to the free end of the element and the other element includes a recess for the lip. The lip includes a first zone with a peripheral surface turned towards the other element on which a first sealing surface is disposed that can be radially interference fitted against a corresponding second sealing surface disposed on the peripheral surface of the recess of the other element. The lip includes a second axially located zone between the first zone and the free end of the element that includes a first radial bearing surface turned towards the other element in contact with a corresponding second radial bearing surface disposed on the peripheral surface of the recess of the other element. The first and second zones are axially separated by a third zone with a radial stiffness lower than the first and second zones, the third zone capable of being radially deformed towards the other element by a pressure exerted thereon.

Sealed threaded tubular connection which is resistant to successive pressure loads

A tubular threaded element including a dry protective coating. The coating includes a solid matrix adhering to the substrate in which there are dispersed particles of at least one solid lubricant belonging to one and the same class. The solid matrix is lubricating and has a rheological behavior of plastic or viscoplastic type. The coating protects the threadings of the threaded elements, used for example in hydrocarbon wells, from corrosion and galling.

Method for finishing a tubular threaded member with a dry protection coating

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.

Threaded element of a component with opposed threading portions and corresponding tubular threaded connection

Growing community of inventors

Wargnies le Petit, France

Laurent Gillot