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US 5,673,753 AGranted
Solidification of water based muds
AssigneeShell Oil Company
InventorsArthur Herman Hale, Kenneth Michael Cowan
Life of this patent
Estimating the term…
Abstract
A drilling mud is converted in-situ to a cement by addition of blast furnace slag.
Claims16
A method for solidifying a drilling fluid in a borehole comprising:
- (a) preparing an aqueous drilling fluid;
- (b) injecting the drilling fluid into the borehole;
- (c) adding blast furnace slag to the drilling fluid;
- (d) displacing the drilling fluid to a preselected location in the borehole;
- and
- (e) allowing the drilling fluid to solidify in-situ.
3 more elements
A method for drilling and cementing a well, comprising
- drilling a borehole with a drilling fluid containing lime,
- depositing a filter cake on the borehole wall,
- treating the drilling fluid with sodium carbonate or zinc carbonate,
- adding blast furnace slag to the drilling fluid to form a cementitious slurry,
- displacing the slurry into the borehole, and
- allowing the slurry to set and bond to the filter cake.
3 more elements
A method for drilling and cementing a well, comprising
- drilling a borehole with it drilling fluid containing lime, salt and alcohol,
- depositing a filter cake on the borehole wall,
- treating the drilling fluid with sodium carbonate or zinc carbonate,
- adding blast furnace slag to the drilling fluid to form a cementitious slurry,
- displacing the slurry into the borehole, and
- allowing the slurry to set and bond to the filter cake.
3 more elements
A method for drilling and cementing a well, comprising
- drilling a borehole with a drilling fluid containing seawater and gypsum,
- depositing a filter cake on the borehole wall,
- treating the drilling fluid with sodium hydroxide or potassium hydroxide,
- adding blast furnace slag to the drilling fluid to form a cementitious slurry,
- displacing the slurry into the borehole, and
- allowing the slurry to set and bond to the filter cake.
3 more elements
A method for drilling and cementing a well, comprising
- drilling a borehole with a drilling fluid containing seawater and lignosulfonate,
- depositing a filter cake on the borehole wall,
- treating the drilling fluid with sodium hydroxide or potassium hydroxide,
- adding blast furnace slag to the drilling fluid to form a cementitious slurry,
- displacing the slurry into the borehole, and
- allowing the slurry to set and bond to the filter cake.
3 more elements
Dependencies are inferred from the claim text.