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US 7,841,425 B2Granted
Drilling subsurface wellbores with cutting structures
AssigneeShell Oil Company
InventorsArthur James Mansure, Rosalvina Ramona Guimerans
Life of this patent
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Abstract
A system for forming a wellbore includes a drill tubular. A drill bit is coupled to the drill tubular. One or more cutting structures are coupled to the drill tubular above the drill bit. The cutting structures remove at least a portion of formation that extends into the wellbore formed by the drill bit.
Claims20
A system for forming a wellbore in a heated formation, comprising:
- a drill tubular;
- a drill bit coupled to the drill tubular;
- and
- one or more cutting structures coupled to the drill tubular above the drill bit, wherein the cutting structures are configured to remove at least a portion of the heated formation that extends into the wellbore formed by the drill bit;
- wherein the wellbore is configured to be formed by the drill bit in the heated formation, the heated formation having been heated by one or more heat sources located in the formation prior to the wellbore being formed.
2 more elements
A method for forming a wellbore in a heated formation, comprising:
- forming the wellbore in the heated formation using a drill bit, wherein the heated formation has been previously heated by one or more heat sources located in the formation;
- and
- using cutting structures positioned above the drill bit to remove heated formation that expands into the wellbore.
A method of forming a wellbore in a heated formation, comprising:
- forming the wellbore in the heated formation using a bottom hole assembly, wherein the heated formation has been previously heated by one or more heat sources located in the formation;
- and
- cutting the formation with cutting structures to remove heated portions of the formation that expand into the wellbore after the wellbore is formed with the bottom hole assembly.
Dependencies are inferred from the claim text.