Brine fluids having improved rheological charactersitics

Details Brine fluids having improved rheological charactersitics Brine fluids having improved rheological charactersitics

1995-08-25

1998-03-17

Gibson, Sharon

Earth boring, well treating, and oil field chemistry

Earth boring

Contains inorganic component other than water or clay

507110, 507209, 507271, 507925, C09K 700

Patent

active

057286523

ABSTRACT:
The invention provides brine based well drilling and servicing fluids which exhibit relatively thermally stable rheological and filtration characteristics. The fluids comprise a brine, an amorphous silica viscosifier, a biopolymer viscosifier, a fluid loss control additive, and a bridging agent. By utilizing both a silica viscosifier and a biopolymer viscosifier to provide the desired rheological characteristics, the fluids have enhanced thermal stability thus maintaining their suspension and hole cleaning properties over an extended temperature range.

REFERENCES:
patent: 4427556 (1984-01-01), House et al.
patent: 4822500 (1989-04-01), Dobson, Jr. et al.
patent: 5514644 (1996-05-01), Dobson
patent: 5616541 (1997-04-01), Dobson, Jr. et al.

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