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US 8,739,903 B2Granted
Adjustable drill bit
AssigneeSchlumberger Technology Corporation
InventorsHenri Denoix, Pierre-Jèrõme Acquaviva, Eric Lavrut
Life of this patent
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Abstract
A rotary drill bit is provided comprising a bit body, which includes a connecting portion for connection to a conveyance and a drilling portion. The drilling portion includes a plurality of cutting elements each having at least one cutting surface, the drilling portion being operable in at least two different drilling orientations, and the drilling surface being rotatable in one of two opposing directions, being a first direction and an opposing second direction.
Claims18
A rotary drill bit comprising:
- a bit body having a connecting portion for connection to a conveyance and a drilling portion;
- the drilling portion including a drilling surface having a plurality of cutting elements, each cutting element having
- at least a first cutting surface and a second cutting surface, the drilling portion being operable in at least two different drilling orientations;
- and
- the drilling surface being rotatable in two opposing directions comprising a first direction and a second direction opposite from the first direction.
2 more elements
A method, comprising:
- rotating a rotary drill bit in a first rotational direction within a well to extend the well, wherein the rotary drill bit comprises a plurality of cutting elements,
- wherein:
- at least one of the plurality of cutting elements comprises first and second cutting surfaces;
- and
- rotating the rotary drill bit in the first rotational direction extends the well by removing material with the first cutting surface of the at least one of the plurality of cutting elements;
- and
- rotating the rotary drill bit in a second rotational direction within the well to further extend the well, wherein the first and second rotational directions are substantially opposite, and wherein
- rotating the rotary drill bit in the second rotational direction extends the well by removing material with the second cutting surface of the at least one of the plurality of cutting elements.
5 more elements
Dependencies are inferred from the claim text.