Polymer enhanced foam drilling fluid
AssigneeMarathon Oil Company
InventorRobert D. Sydansk
Life of this patent
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Abstract
A process employing a polymer enhanced foam in a wellbore as a drilling fluid during a wellbore drilling operation. The polymer enhanced foam is formed from an uncrosslinked acrylamide polymer, a surfactant, an aqueous solvent, and an added gas.
Claims11
A process for drilling a wellbore at a surface into a subterranean formation for production of hydrocarbons, the process comprising:
- placing a polymer enhanced foam in a wellbore being drilled, wherein said polymer enhanced foam comprises a substantially uncrosslinked acrylamide polymer, a surfactant, an aqueous solvent, and an added gas;
- and
- circulating said foam through said wellbore as a drilling fluid to suspend rock cuttings from a drilling face and transport said rock cuttings to the surface.
A process for drilling a wellbore at a surface into a subterranean formation for production of hydrocarbons, the process comprising:
- placing a polymer enhanced foam in a wellbore being drilled, wherein said polymer enhanced foam comprises substantially uncrosslinked polyacrylamide, a surfactant, an aqueous solvent, and an added gas;
- and
- circulating said foam through said wellbore as a drilling fluid to suspend rock cuttings from a drilling face and transport said rock cuttings to the surface.
A process for drilling a wellbore at a surface into a subterranean formation for production of hydrocarbons, the process comprising:
- placing a polymer enhanced foam in a wellbore being drilled, wherein said polymer enhanced foam comprises substantially uncrosslinked partially hydrolyzed polyacrylamide, a surfactant, an aqueous solvent, and an added gas;
- and
- circulating said foam through said wellbore as a drilling fluid to suspend rock cuttings from a drilling face and transport said rock cuttings to the surface.
Dependencies are inferred from the claim text.