Process using gellan as a filtrate reducer for water-based drill

Details Process using gellan as a filtrate reducer for water-based drill Process using gellan as a filtrate reducer for water-based drill

1996-04-15

1998-04-28

Tucker, Philip

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

507113, 507114, 507120, C09K 702

Patent

active

057444285

ABSTRACT:
The present invention relates to a process for controlling the permeability of the walls of the geologic formations drilled. The circulating drilling fluid includes a determined amount of gellan used as a filtrate reducer.
In the process, the viscosity of the fluid is mainly controlled by polymers, such as xanthan, scleroglucan or wellan.
The invention further relates to a drilling fluid including gellan.

REFERENCES:
patent: 3933788 (1976-01-01), Kang et al.
patent: 4503084 (1985-03-01), Baird et al.
patent: 4981520 (1991-01-01), Hoskin et al.
patent: 5238065 (1993-08-01), Mondshine et al.
patent: 5253711 (1993-10-01), Mondshine
patent: 5362312 (1994-11-01), Skaggs et al.
patent: 5376396 (1994-12-01), Clark
patent: 5514644 (1996-05-01), Dobson

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