Rolling cutter bit design
First Claim
Patent Images
1. A cutting tool comprising:
- a tool body having a tool axis and a plurality of blades extending outwardly therefrom;
a plurality of cutting elements mounted on at least one of the plurality of blades, the plurality of cutting elements comprising;
a plurality of rotatable cutting elements mounted on at least one of the plurality of blades, wherein each rotatable cutting element is rotatable around a cutting element axis extending through the rotatable cutting element; and
wherein at least one rotatable cutting element is mounted at a side rake angle less than at least one other rotatable cutting element, the at least one rotatable cutting element being at a position radially closer to the tool axis than the at least one other rotatable cutting element.
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Abstract
A cutting tool having a tool body with a plurality of blades extending radially therefrom and a plurality of rotatable cutting elements mounted on at least one of the plurality of blades is disclosed, wherein the plurality of rotatable cutting elements are mounted on the at least one blade utilizing multiple side rake angles.
56 Citations
20 Claims
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1. A cutting tool comprising:
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a tool body having a tool axis and a plurality of blades extending outwardly therefrom; a plurality of cutting elements mounted on at least one of the plurality of blades, the plurality of cutting elements comprising; a plurality of rotatable cutting elements mounted on at least one of the plurality of blades, wherein each rotatable cutting element is rotatable around a cutting element axis extending through the rotatable cutting element; and wherein at least one rotatable cutting element is mounted at a side rake angle less than at least one other rotatable cutting element, the at least one rotatable cutting element being at a position radially closer to the tool axis than the at least one other rotatable cutting element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A cutting tool comprising:
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a tool body having a plurality of blades extending outwardly therefrom, where each blade comprises a cone region in the radially most inward region of the tool body, a nose region radially adjacent the cone region, a shoulder region extending radially between the nose region and a gage region, the gage region defining an outer radius of the cutting tool; a plurality of cutting elements mounted on at least one of the plurality of blades utilizing multiple side rake angles, the plurality of cutting elements comprising at least one rotatable cutting element, wherein each rotatable cutting element is rotatable around a cutting element axis extending through the rotatable cutting element; wherein the side rake angle of at least one of the plurality of cutting elements mounted in the shoulder region is greater than the side rake angle of at least one of the plurality of cutting elements mounted in the cone region and the side rake angle of at least one of the plurality of cutting elements mounted in the gage region. - View Dependent Claims (19)
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20. A cutting tool comprising:
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a tool body having a plurality of blades extending outwardly therefrom, where each blade comprises a cone region in the radially most inward region of the tool body, a nose region radially adjacent the cone region, a shoulder region extending radially between the nose region and a gage region, the gage region defining an outer radius of the cutting tool; a plurality of cutting elements mounted on at least one of the plurality of blades in the cone region, nose region and shoulder region, the plurality of cutting elements comprising;
at least one fixed cutting element; anda plurality of rotatable cutting elements mounted in at least one of the nose region and the shoulder region of the at least one of the plurality of blades utilizing at least one side rake angle, wherein each rotatable cutting element is rotatable around a cutting element axis extending through the rotatable cutting element; and wherein at least one of the cutting elements is mounted in the cone region at a side rake angle less than the at least one side rake angle of the plurality of rotatable cutting elements.
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Specification