Patent · US Active

Viscoelastic surfactant based wellbore fluids and methods of use

US8937034B2 · kind B2 · utility

3Cited by

12References

21Claims

0Family size

Assignee

M-I L.L.C. · US

Inventors

Charles Svoboda · Katy, US
LaTosha Moore · Richmond, US
Frank E. Evans · Diemelstraße, US

Key dates

Filing date	Jan 7, 2009
Grant date	Jan 20, 2015
Priority date	—
Expiry date	May 23, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2208/30
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A wellbore fluid that includes an aqueous based fluid; an amphoteric, viscoelastic surfactant; and a modified starch is disclosed. Methods of drilling subterranean wells, methods of reducing the loss of fluid out of subterranean wells, and methods of completing wellbores using aqueous-based fluids having an ampoteric, viscoelastic surfactant and a modified starch are also disclosed.

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