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US 2014/0151133 A1Published application
Earth boring tool with improved arrangement of cutter side rakes
AssigneeUlterra Drilling Technologies, L.P.
InventorsRob A. Simmons, Carl Aron Deen, Andrew David Murdock
Life of this patent
Estimating the term…
Abstract
Earth boring tools with a plurality of fixed cutters have side rake or lateral rakes configured for improving chip removal and evacuation, drilling efficiency, and/or depth of cut management as compared with conventional arrangements
Claims38
A rotary apparatus for boring earth, comprising:
- a body having a central axis, about which the bit is intended to rotate;
- and
- a group of two or more PDC cutters mounted in fixed positions on the body, the group of cutters collectively defining at least a portion of a cutting profile for the bit when it is rotated, each of the cutters in the group of cutters having a cutting face, a predetermined radial position within the cuffing profile based on its distance from the central axis, and a predetermined orientation for its cutting face, the predetermined orientation comprising a side inclination angle, which angle can be negative, zero, or positive;
- wherein at least two cutters in the group of cutters have side inclination angles that differ from one another by at least 4 degrees.
1 more element
A rotary apparatus for earth boring, comprising:
- a body having a central axis, about which the apparatus is intended to rotate;
- and
- a group of cutters in fixed locations on the body, the group of cutters collectively defining a cutting profile for the bit when it is rotated, each cutter in the group of cutters having a cutting face, a predetermined position within the cutting profile, and a predetermined side inclination angle, which angle can be negative, zero, or positive;
- wherein the group of cutters comprises a first cutter, a second cutter, and a third cutter at different radial positions within the cutting profile, and wherein the side inclination angle of the first cutter as compared to the second cutter changes in a first direction, and the side inclination angle of the third cutter as compared to the second cutter changes a second direction opposite the first direction.
1 more element
A rotary apparatus for earth boring operations, comprising:
- a body having a central axis, about which the apparatus is intended to rotate;
- and
- a plurality of PDC cutters arrayed on the body of the bit, the plurality of cutters collectively defining at least a portion of a cutting profile for the bit when it is rotated, each of the group of cutters having a cutting face, a predetermined radial position within the cutting profile, and a predetermined side inclination angle for the cutting face, which angle can be negative, zero, or positive;
- wherein the plurality of cutters comprises a group of at least two adjacent cutters, a third cutter adjacent the first group, and at least a fourth cutter that is not part of the group;
- and
- wherein the side inclination angles of each cutter in the first group, and the side inclination angle of the third cutter compared to the side inclination angle of each of the cutters in the first group is changed in a first direction, and the side inclination angle of the fourth cutter as compared to the side inclination angle of the third cutter is changed in a second direction opposite the first direction.
3 more elements
A rotary apparatus for earth boring operations, comprising;
- a body having a central axis, about which the apparatus is intended to rotate;
- and
- a plurality of cutters arrayed on the body of the cutter, the group of cutters collectively defining a cutting profile for the bit when it is rotated, each of the group of cutters having a cutting face, a predetermined radial position within the cutting profile, and a predetermined side inclination angle for the cutting face;
- wherein the plurality of cutters comprises a first group of at least two adjacent cutters and a second group of at least two adjacent cutters;
- and
- wherein the side inclination angles of each cutter in the first group are the same and the side inclination angles of each cutter in the second group are the same but different from the side inclination angles in the first group.
3 more elements
A rotary apparatus for earth boring operations, comprising:
- a body having a central axis, about which the apparatus is intended to rotate;
- and
- a plurality of cutters arrayed on the body in fixed positions, the plurality of cutters collectively defining at least a portion of a cutting profile for the bit when it is rotated, each of the group of cutters having a cutting face, a predetermined radial position within the cutting profile, and a predetermined side inclination angle;
- wherein the group of cutters comprises a first group of at least two adjacent cutters, and a second group of at least two adjacent cutters;
- wherein the side inclination angles of the cutters in the first group change consecutively from one cutter to the next adjacent cutter in a first direction;
- and the side inclination angles of the cutters in the second group change consecutively from one cutter to the next adjacent cutter in a second direction opposite the first direction.
3 more elements
A rotary apparatus for earth boring operations, comprising:
- a body having a central axis, about which the bit is intended to rotate, the body having formed thereon a plurality of outwardly extending blades, the plurality of blades including a first blade and a second blade;
- and
- a group of fixed cutters arrayed along the length of the first blade, the group of cutters comprises at least three adjacent cutters having alternating negative and positive side inclination angles;
- wherein the side inclination angle of each cutter in the group of cutters is defined by the angular orientation of the cutting face of that cutter about an axis that is normal to a tangent to the cutting profile at the radial position of that cutter.
1 more element
A rotary apparatus for earth boring operations, comprising:
- a body having a central axis, about which the bit is intended to rotate, the body having formed thereon a plurality of outwardly extending blades, the plurality of blades including a first blade and a second blade;
- and
- a group of fixed cutters arrayed along the length of the first blade, the group of cutters comprises at least three adjacent cutters having alternating negative and positive side inclination angles;
- wherein the side inclination angle of each cutter in the group of cutters is defined by the angular orientation of the cutting face of that cutter about an axis that is normal to a tangent to the cutting profile at the radial position of that cutter, projected onto the plane of the cutting face.
1 more element
A rotary apparatus for earth boring operations, comprising:
- a body having a central axis, about which the bit is intended to rotate;
- a group of fixed cutters mounted on the body that collectively form a cutting profile for the bit;
- a plurality of outwardly extending blades formed on the body, the plurality of blades including a first blade and a second blade;
- wherein the group of cutters comprise a first group of fixed cutters arrayed linearly along at least a portion of the length of the first blade, the side inclination angles of the adjacent cutters in the first group changing directions in an alternating fashion along that portion of the length of the blade;
- wherein the side inclination angle of each cutter in the group of cutters is defined by the angular orientation of the cutting face of that cutter about an axis that is normal to a tangent to the cutting profile of the at the radial position of that cutter, projected onto the plane of the cutting face.
2 more elements
Rotary apparatus of any one of the preceding claims, wherein each fixed cutter is a PDC cutter.
Dependencies are inferred from the claim text.