Threaded tubular component and method for coating such a threaded tubular component
AssigneesVallourec Oil and Gas France, Nippon Steel Corporation
InventorsEric Gard, Mohamed Gouider, Mikael Petit, Eliette Pinel
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Abstract
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° C. to 40° C. thereby obtaining a threaded end coated with a film; drying the threaded end coated with the film; and densifying the film.
Claims20
A method for producing a dry film comprising a matrix on a threaded tubular component for drilling or working hydrocarbon wells, the method comprising:
- applying a mixture comprising a dispersion or an aqueous emulsion of a semi-crystalline thermoplastic acrylic copolymer selected from the group consisting of one or more of a styrene-acrylic, an acrylic-methacrylate, a styrene-acrylic-methacrylate, an aliphatic polyurethane-acrylic, a polyacrylate, and a vinyl acetate-ethylene-vinyl chloride terpolymer, with a solution of a potassium polysilicate having a SiO2/K2O weight ratio that is 2.5 to 3.5 onto a threaded end of the threaded tubular component by spraying said mixture in a liquid state at a mixture application temperature of from 20° C. to 40° C. onto said threaded end, thereby obtaining a threaded end coated with a film;
- drying the threaded end coated with the film at a temperature that is greater than the mixture application temperature to a maximum of 80° C. for a period of at least 15 minutes;
- and
- densifying the film at a temperature of from 80° C. to 160° C. for a period of from 30 to 60 minutes to produce said dry film comprising a matrix,
- wherein
- depending on whether the threaded end is male or female, a threaded zone is provided on an exterior, if male, or an interior, if female, peripheral surface of the threaded end.
A method for producing a dry film comprising a matrix on a threaded tubular component for drilling or working hydrocarbon wells, the method comprising:
- applying a mixture comprising a dispersion or an aqueous emulsion of a semi-crystalline thermoplastic acrylic copolymer selected from the group consisting of one or more of a styrene-acrylic, a styrene-acrylic-methacrylate, and an aliphatic polyurethane-acrylic, with a solution of a potassium polysilicate having a SiO2/K2O weight ratio that is 2.5 to 3.5 onto a threaded end of the threaded tubular component by spraying said mixture in a liquid state at a mixture application temperature of from 20° C. to 40° C. onto said threaded end, thereby obtaining a threaded end coated with a film;
- drying the threaded end coated with the film at a temperature that is greater than the mixture application temperature to a maximum of 80° C. for a period of at least 15 minutes;
- and
- densifying the film at a temperature of from 80° C. to 160° C. for a period of from 30 to 60 minutes to produce said dry film comprising a matrix,
- wherein depending on whether the threaded end is male or female, a threaded zone is provided on an exterior, if male, or an interior, if female, peripheral surface of the threaded end, and
- wherein a thickness of the dry film is 30 to 50 μm.
Dependencies are inferred from the claim text.