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US 12,012,807 B2Granted
Drill bit with offset counter-rotating cutters
AssigneeHalliburton Energy Services, Inc.
InventorDouglas Bruce Caraway
Life of this patent
Estimating the term…
Abstract
A drill bit is provided. The drill bit includes a bit body and an axle disposed in the bit body. The axle includes a first axle portion extending in a longitudinal direction and a second axle portion extending in the longitudinal direction. A longitudinal end of the first axle portion is continuous with a longitudinal end of the second axle portion. When viewed from the longitudinal direction, the first axle portion and the second axle portion are not coaxial, and an outer perimeter of the first axle portion is located entirely within an outer perimeter of the second axle portion. The drill bit also includes a first cutter disposed on the first axle portion and a second cutter disposed on the second axle portion.
Claims17
A hybrid drill bit, comprising:
- a bit body having an opening, wherein the opening comprises a first opening portion, a second opening portion, a third opening portion, and a fourth opening portion, wherein the third opening portion and the fourth opening portion extend axially into the bit body to form a cutter pocket in the bit body;
- wherein the second opening portion extends longitudinally into the bit body from a first side of the bit body to the fourth opening portion, and wherein the first opening portion extends partially into the bit body from the third opening portion in a longitudinal direction;
- an axle disposed in the opening of the bit body, the axle comprising:
- a first axle portion extending in a longitudinal direction and secured at least partially within the first opening portion;
- and
- a second axle portion extending in the longitudinal direction and secured at least partially within the second opening portion, wherein a longitudinal end of the first axle portion is continuous with a longitudinal end of the second axle portion;
- wherein, when viewed from the longitudinal direction:
- the first axle portion and the second axle portion are not coaxial,
- an outer perimeter of the first axle portion is located entirely within an outer perimeter of the second axle portion, and
- wherein no point along the outer perimeter of the first axle portion intersects the outer perimeter of the second axle portion;
- a first cutter disposed on the first axle portion and positioned at least partially within the third opening portion;
- and
- a second cutter disposed on the second axle portion and positioned at least partially within the fourth opening portion.
10 more elements
A method of drilling a wellbore, comprising:
- lowering a hybrid drill bit into a subterranean formation, the hybrid drill bit comprising:
- a bit body having an opening, wherein the opening comprises a first opening portion, a second opening portion, a third opening portion, and a fourth opening portion, wherein the third opening portion and the fourth opening portion extend axially into the bit body to form a cutter pocket in the bit body;
- wherein the second opening portion extends longitudinally into the bit body from a first side of the bit body to the fourth opening portion, wherein the first opening portion extends partially into the bit body from the third opening portion in a longitudinal direction, and wherein the first opening portion includes a smaller diameter than the second opening portion;
- an axle disposed in the opening of the bit body, the axle comprising:
- a first axle portion extending in a longitudinal direction and secured at least partially within the first opening portion;
- and
- a second axle portion extending in the longitudinal direction and secured at least partially within the second opening portion, wherein a longitudinal end of the first axle portion is continuous with a longitudinal end of the second axle portion;
- wherein, when viewed from the longitudinal direction:
- the first axle portion and the second axle portion are not coaxial,
- an outer perimeter of the first axle portion is located entirely within an outer perimeter of the second axle portion, and
- wherein no point along the outer perimeter of the first axle portion intersects the outer perimeter of the second axle portion;
- and
- a first cutter disposed on the first axle portion and positioned at least partially within the third opening portion;
- a second cutter disposed on the second axle portion and positioned at least partially within the fourth opening portion;
- and
- forming the wellbore by cutting through the subterranean formation at least partially via the two cutters.
13 more elements
A hybrid drill bit, comprising:
- a bit body having an opening, wherein the opening comprises a first opening portion, a second opening portion, a third opening portion, and a fourth opening portion, wherein the third opening portion and the fourth opening portion extend axially into the bit body to form a cutter pocket in the bit body;
- wherein the second opening portion extends longitudinally into the bit body from a first side of the bit body to the fourth opening portion, wherein the first opening portion extends partially into the bit body from the third opening portion in a longitudinal direction, and wherein the first opening portion has a smaller diameter than the second opening portion;
- an axle disposed in the opening of the bit body of the drill bit, the axle comprising:
- a first axle portion extending in a longitudinal direction and secured at least partially within the first opening portion;
- and
- a second axle portion extending in the longitudinal direction and secured at least partially within the second opening portion, wherein the second axle portion has a larger diameter than the first opening portion, wherein a longitudinal end of the first axle portion is continuous with a longitudinal end of the second axle portion;
- wherein, when viewed from the longitudinal direction:
- the first axle portion and the second axle portion are not coaxial,
- an outer perimeter of the first axle portion is located entirely within an outer perimeter of the second axle portion, and
- a central axis of the first axle portion is offset from a central axis of the second axle portion in a direction parallel to a longitudinal axis of the bit body;
- a first cutter disposed on the first axle portion and positioned at least partially within the third opening portion;
- and
- a second cutter disposed on the second axle portion and positioned at least partially within the fourth opening portion.
10 more elements
Dependencies are inferred from the claim text.