Patent · US Active

Rheology modifier for drilling and well treatment fluids

US9611418B2 · kind B2 · utility

1Cited by

4References

11Claims

0Family size

Assignee

LAMBERTI SPA · IT

Inventors

Cristina Picco · Somma Lombardo, IT
Massimo Cecchetto · Cassano Magnago, IT
Pierangelo Pirovano · Cassano Magnago, IT
Luigi Merli · Saronno, IT
Giovanni Floridi · Novara, IT
Giuseppe Li Bassi · Varese, IT

Key dates

Filing date	Jun 20, 2013
Grant date	Apr 4, 2017
Priority date	—
Expiry date	Dec 22, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2208/02
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Water in oil emulsion drilling and well treatment fluids comprising an ester of trimer fatty acids and polyoxyethyiene glycol, the polyoxyethyiene glycol having average molecular weight from about (150) to about (600) and the trimer acids having at least about 20% of carboxyl acid groups esterified, as rheology modifier.

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