摘要:
The invention concerns a process for producing a dry film with a high galling resistance on a threaded element for drilling and/or operating a hydrocarbon well, characterized in that it comprises at least the following steps: forming a stable dispersion comprising a polyamide-imide powder, a polar aprotic solvent with a boiling point of more than 180° C. at 760 mm Hg, and water; applying the dispersion to one of the ends (1, 2) of said threaded element at a temperature in the range 20° C. to 40° C.; drying the coated end.
摘要:
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° C. at 760 mm Hg, and water. The invention also concerns a process for producing a dry polyamide-imide film on a substrate.
摘要:
The subject matter of the invention is a tubular element intended for drilling and/or operating hydrocarbon wells having one end (1; 2) comprising at least one threaded area (3; 4), characterised in that the end (1; 2) is at least partially coated with a dry film (12), comprising a matrix (13) including a mixture of at least one alkali polysilicate and at least one semi-crystalline thermoplastic organic polymer. The invention also relates to a method for producing a dry film (12), comprising a matrix (13) including a mixture of at least one alkali polysilicate and at least one semi-crystalline thermoplastic organic polymer, on such a tubular element intended for drilling and/or operating hydrocarbon wells.
摘要:
The invention concerns a threaded tubular component intended for drilling or working hydrocarbon wells, said tubular component having, at one of its ends (1; 2), a threaded zone (3; 4) formed on its external or internal peripheral surface depending on whether the threaded end is male or female in type, characterized in that the end portion (1; 2) is at least partially coated with a dry film (12), comprising a thermoplastic or thermoset matrix (13) including microcapsules filled with compounds in the liquid form.