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US 8,507,413 B2Granted
Methods using well drilling fluids having clay control properties
AssigneeClearwater International, LLC
InventorThomas P. Wilson, Jr.
Life of this patent
Estimating the term…
Abstract
Clay is stabilized in methods for drilling of wells and other formation treatment for hydrocarbon production by the addition to the drilling or other fluid including a choline compound together with an formation control additive.
Claims26
A method for controlling clay swelling comprising the step of:
- drilling a well through a formation including swellable clay with an aqueous drilling fluid consisting essentially of a choline compound and a formation control additive, where the formation control additives including an amine, a cationic formation control additive, or mixtures and combinations thereof.
A method for controlling clay swelling comprising the step of:
- drilling a well with a first drilling fluid, and
- adding a clay control composition consisting essentially of a choline compound and a formation control additive to the drilling fluid when the drilling fluid is in contact with a formation including swellable clay, where the formation control additives including an amine, a cationic formation control additive, or mixtures and combinations thereof.
Dependencies are inferred from the claim text.