Lamberti Spa

Erik Gallo

Giuseppe Li Bassi

Giovanni Floridi

Luigi Merli

Pierangelo Pirovano

Massimo Cecchetto

Letizia Privitera

Lorena Bottarello

Laura Vigano'

Laura Vigano′

A method of minimizing the weight loss of mass of the drilling pipe and wellbore casing while drilling a subterranean well with an oil-based drilling fluid comprising adding to the oil-based drilling fluid an anti-wear additive based on sulfated, sulfonated or sulfited natural oils or fats of vegetable or animal origin.

Method of drilling a wellbore

The present invention relates to a rheology modifier and to its use as thickener in oil-based subterranean treatment fluids; more particularly, the rheology modifier is an aqueous slurry of a pyromellitamide.

Rheology modifier for subterranean treatment fluids

Method for increasing lubricity of a wellbore fluid comprising the following steps: i) preparing a water in oil microemulsion that contains insoluble particles of metal hydroxides and/or metal oxides in the inner aqueous phase, the insoluble particles being synthesized from their salt precursors in the water droplets of the microemulsion; ii) adding to the wellbore fluid the water in oil microemulsion; iii) injecting the wellbore fluid into a subterranean formation and iv) performing the drilling, completion or coiled tubing operations in the subterranean formation.

Method of increasing lubricity of wellbore fluids

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Mottalciata, Italy

Erik Gallo