Vallourec Oil and Gas France

Nippon Steel Sumitomo Metal Corporation

Nippon Steel Corporation

Sumitomo Metal Industries, Inc.

Mikael Petit

Kunio Goto

Eric Gard

Eliette Pinel

Mohamed Gouider

A method for producing a matrix-containing dry film on a threaded tubular component for drilling or working hydrocarbon wells, by applying a mixture containing a dispersion or an aqueous emulsion of an acrylic copolymer with a solution of an alkaline polysilicate in a liquid state onto a threaded end of the threaded tubular component by spraying at a temperature of from 20&#xb0; C. to 40&#xb0; C. thereby obtaining a threaded end coated with a film; drying the threaded end coated with the film; and densifying the film.

Threaded tubular component and method for coating such a threaded tubular component

A threaded end () of a tubular component for drilling or working hydrocarbon wells, said end comprising a threaded zone () produced on its external or internal peripheral surface depending on whether the threaded end is male or female in type, at least a portion of the end () being coated with a dry film comprising an organic matrix in which ion exchange pigments are dispersed in proportions in the range 3% to 30% by weight; and a connection resulting from connecting two corresponding ends by makeup.

Threaded end of a tubular component for drilling or working hydrocarbon wells, and resulting connection

The invention concerns a process for preparing an aqueous polyamide-imide dispersion, characterized in that it comprises at least one step of selecting a polyamide-imide powder and a step of producing a dispersion comprising the polyamide-imide powder, a polar aprotic solvent with a boiling point of more than 180&#xb0; C. at 760 mm Hg, and water. The invention also concerns a process for producing a dry polyamide-imide film on a substrate.

Process for preparing a stable aqueous dispersion of polyamide-imide which is free of carcinogenic, mutagenic or reprotoxic substances, and application to coatings

The invention concerns an assembly for the production of a threaded connection, comprising a first and a second tubular component each with an axis of revolution () and each provided at one of their ends () with a threaded zone () produced on the outer or inner peripheral surface of the component depending on whether the threaded end is male or female in type, said ends () being capable of cooperating by makeup and ending in a terminal surface (), at least one first contact surface being provided on one of the ends () and at least one second contact surface being provided on the corresponding end (), such that the first and second contact surfaces come into contact during makeup of the ends (), characterized in that the first and second contact surfaces are respectively each coated with a first and a second dry thermoplastic film the matrices of which are constituted by one or more thermoplastic polymers, only one of the first and second dry thermoplastic films further comprising a liquid amorphous thermoplastic resin with a dynamic viscosity in the range 2000 to 40000 mPa&#xb7;s at 25&#xb0; C.

Assembly for producing a galling-resistant threaded tubular connection

A threaded tubular component configured for drilling or working hydrocarbon wells, the tubular component including, at one of its ends, a threaded zone formed on its external or internal peripheral surface depending on whether the threaded end is male or female in type. The end portion is at least partially coated with a dry film, including a thermoplastic or thermoset matrix including microcapsules filled with compounds in liquid form.

Threaded tubular component and resulting connection

The invention concerns a threaded tubular component for drilling or working hydrocarbon wells, said tubular component having at one of its ends () a threaded zone () produced on its outer or inner peripheral surface depending on whether the threaded end is male or female in type, in which at least a portion of the end () is coated with at least one film of polyurethane (),% solid state, with an essentially rigid structure, based on a matrix of polyurethane and polyurea, in which the urethane functionality is predominant with respect to the urea functionality in a proportion of at least% by weight.

Process for coating a threaded tubular component, threaded tubular component and resulting connection

The invention concerns a threaded tubular component for drilling or working hydrocarbon wells, said tubular component having at one of its ends () a threaded zone () produced on its outer or inner peripheral surface depending on whether the threaded end is male or female in type, characterized in that at least a portion of the end () is coated with a lubricating dry film () the matrix () of which comprises at least one migrating sliding agent () belonging to the oils or waxes family and principally distributed at the surface of the lubricating dry film () such that the coefficient of friction of the film () is less than 0.07 at loads of less than 40 N while the coefficient of friction of the film () is more than 0.1 at loads of more than 200 N.

A galling-resistant threaded tubular component for drilling or operating hydrocarbon wells and a process for coating the component. The tubular component includes at one of its ends a threaded zone produced on its external or internal peripheral surface depending on whether the threaded end is male or female in type, at least a portion of the end being coated with a dry film including a fluorourethane matrix.

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Villefranche sur Saone, France

Mikael Petit