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US 12,595,704 B2Granted
Casing drill bit facilitating drill-out thereof, and related methods of manufacture and use
OwnerJuan Miguel Bilen, Nathaniel R. Adams +3inventors
InventorsJuan Miguel Bilen, Nathaniel R. Adams, Melody Alicia Maldonado, Eric Roberto Fankhauser, Nicole Rojas
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Abstract
An earth boring system includes a drill-out bit disposed at a distal end of a drill string. The drill-out bit includes blades. The system also includes a casing drill bit that has a drill bit body with a bottom profile. The bottom profile at least partially matches a profile of the blades of the drill-out bit. The drill-out bit is operable to drill through the casing drill bit.
Claims18
An earth boring system comprising:
- a drill-out bit disposed at a distal end of a drill string, the drill-out bit comprising blades;
- and
- a casing drill bit comprising a drill bit body having a bottom profile and a plurality of casing drill bit blades, the bottom profile at least partially matching a profile of the blades of the drill-out bit, angular distances between circumferentially neighboring blades of the plurality of casing drill bit blades at a radial distance from a central axis of the casing drill bit all being unequal to one another, each of the blades having a different swept profile from one another, and the drill-out bit being operable to drill through the casing drill bit.
A casing drill bit comprising:
- a casing drill bit body;
- and
- blades extending from the casing drill bit body, each blade comprising cutting elements, first angular distances between the cutting elements on circumferentially neighboring blades of the blades all being unequal to one another at a first radial distance from a rotational axis of the casing drill bit, and each of the blades having a different swept profile from one another.
An earth boring system comprising:
- a drill-out bit disposed at a distal end of a drill string, the drill-out bit comprising drill-out blades;
- and
- a casing drill bit comprising casing drill bit blades, wherein first angular distances between neighboring casing drill bit blades of the casing drill bit blades at a first radius are not equal to second angular distances between the neighboring casing drill bit blades at a second radius, the second radius being larger than the first radius, each of the blades having a different swept profile from one another, and the drill-out bit being configured to drill through the casing drill bit.
Dependencies are inferred from the claim text.