Patent · US Expired

Aqueous drilling fluid

US4212794A · kind A · utility

9Cited by

8References

2Claims

0Family size

Assignee

Deutsche Texaco Aktiengesellschaft · DE

Inventors

Karl-Heinz Grodde
Alfred Schulz · Oberriexingen, DE

Key dates

Filing date	Nov 21, 1977
Grant date	Jul 15, 1980
Priority date	—
Expiry date	Nov 21, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10N2040/50
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

This invention relates to an aqueous drilling fluid containing a tall oil fraction as a lubricating additive, a method of drilling with said drilling fluid containing said tall oil lubricating additive and the tall oil lubricating additive per se.

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