Rheologically stable water-based high temperature drilling fluid

Details Rheologically stable water-based high temperature drilling fluid Rheologically stable water-based high temperature drilling fluid

1992-07-22

1993-09-14

Geist, Gary

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

C09K 702

Patent

active

052448770

ABSTRACT:
A water-based fluid for use in the drilling of wells is disclosed. This fluid: is rheologically stable over a wide temperature range, from room temperature to at least about 475.degree. F., thus reducing drilling time in high temperature applications; typically necessitates minimal disposal rates in operation; is resistant to temperature-induced carbonate gellation; creates a thin filter cake; and combines the low toxicity of a water-based fluid with the performance stability of an oil-based fluid.
As further disclosed herein, this drilling fluid comprises a water-based colloidal suspension of certain readily available drilling fluid components, including clay, an inorganic salt, and parenchymal cell cellulose ("PCC").

REFERENCES:
patent: 4629575 (1986-12-01), Weibel
Aqualon literature entitled "HP-077.TM. Polymer" Apr. 1989.

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