Drilling fluid and filter cake removal methods and compositions

Details Drilling fluid and filter cake removal methods and compositions Drilling fluid and filter cake removal methods and compositions

1994-09-15

1996-03-26

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166300, 166312, 507209, 507928, E21B 3316, E21B 3700

Patent

active

055012760

ABSTRACT:
Methods and compositions for removing gelled and dehydrated drilling fluid and filter cake from the walls of wellbores are provided. The methods basically include contacting the drilling fluid and filter cake with a removal composition comprised of an aqueous sugar solution for a period of time sufficient to cause the disintegration of the drilling fluid and filter cake. The composition, having the disintegrated drilling fluid and filter cake dispersed therein, is then displaced from the wellbore.

REFERENCES:
patent: 2221353 (1940-11-01), Limerick
patent: 3411580 (1968-11-01), McKinney et al.
patent: 3625286 (1971-12-01), Parker
patent: 4333530 (1982-06-01), Armstrong
patent: 4681165 (1987-07-01), Bannister
patent: 4830766 (1989-05-01), Gallup et al.
patent: 4946604 (1990-08-01), Smith
patent: 5165477 (1992-11-01), Shell et al.
patent: 5238065 (1993-08-01), Mondshine et al.

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