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US 5,464,060 AGranted
Universal fluids for drilling and cementing wells
AssigneeShell Oil Company
InventorsArthur H. Hale, Kenneth M. Cowan, James J. W. Nahm
Life of this patent
Estimating the term…
Abstract
A universal fluid which includes a water-based drilling mud and a hydraulic material is used to drill a borehole and lay down settable filter cake. After drilling is completed, the filter cake and universal fluid are caused to solidify in selected parts of the borehole by admixing the universal fluid with an activator.
Claims8
A method for drilling and cementing a well comprising,
- preparing a universal fluid by admixing a well fluid or drilling mud with Portland cement and pozzolan;
- drilling a borehole with the universal fluid and laying down a settable filter cake on the walls of said borehole during drilling of the well;
- and
- activating the filter cake to harden and set up.
1 more element
A method for drilling and cementing a well comprising,
- preparing a universal fluid by admixing a well fluid or drilling mud with Portland cement and blast furnace slag and pozzolan;
- drilling a borehole with
- drilling a borehole with the universal fluid and laying down a settable filter cake on the walls of said borehole during drilling of the well;
- and
- activating the filter cake to harden and set up.
2 more elements
A method for drilling and cementing a well comprising,
- preparing a universal fluid by admixing a well fluid or drilling mud with Portland cement and blast furnace slag;
- drilling a borehole with the universal fluid and laying down a settable filter cake on the walls of said borehole during drilling of the well;
- and
- activating the filter cake to harden and set up.
1 more element
A method for drilling and cementing a well comprising,
- preparing a universal fluid by admixing a well fluid or drilling mud with blast furnace slag;
- drilling a borehole with the universal fluid and laying down a settable filter cake on the walls of said borehole during drilling of the well;
- and
- activating the filter cake to harden and set up.
1 more element
Dependencies are inferred from the claim text.