Patent · US Active

Method of drilling a wellbore

US11339317B1 · kind B1 · utility

0Cited by

4References

7Claims

0Family size

Assignee

LAMBERTI SPA · IT

Inventors

Erik Gallo · Cossato, IT
Lorena Bottarello · Cassano Magnago, IT
Luigi Merli · Saronno, IT
Pierangelo Pirovano · Cassano Magnago, IT
Massimo Cecchetto · Cassano Magnago, IT
Laura Vigano · Parabiago, IT
Giovanni Floridi · Novara, IT
Giuseppe Li Bassi · Varese, IT

Key dates

Filing date	Jan 13, 2020
Grant date	May 24, 2022
Priority date	—
Expiry date	Jan 13, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10N2050/013
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.