CUTTING ELEMENT ASSEMBLIES COMPRISING ROTATABLE CUTTING ELEMENTS
First Claim
1. A cutting element assembly, comprising:
- a sleeve defining a first internal groove and a first frustoconical surface longitudinally spaced from the first internal groove;
a rotatable cutting element disposed within the sleeve, the rotatable cutting element comprising a polycrystalline hard material and a supporting substrate, wherein the polycrystalline hard material has an end cutting surface, wherein the rotatable cutting element defines a second groove in a surface of the supporting substrate and a second frustoconical surface longitudinally spaced from the second internal groove; and
a retention element disposed partially within the first groove and partially within the second groove.
2 Assignments
0 Petitions
Accused Products
Abstract
A cutting element assembly includes a sleeve, a rotatable cutting element disposed within the sleeve, and a retention element. The sleeve and rotatable cutting element each have frustoconical surfaces. In some embodiments, a rotatable cutting element defines a first generally cylindrical surface, a second generally cylindrical surface, and an axial bearing surface opposite the end cutting surface and intersecting each of the first generally cylindrical surface and the second generally cylindrical surface. A bearing element may be disposed between an upper surface of a sleeve and a bearing surface of the rotatable cutting element. Earth-boring tools having rotating cutting elements are also disclosed.
0 Citations
20 Claims
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1. A cutting element assembly, comprising:
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a sleeve defining a first internal groove and a first frustoconical surface longitudinally spaced from the first internal groove; a rotatable cutting element disposed within the sleeve, the rotatable cutting element comprising a polycrystalline hard material and a supporting substrate, wherein the polycrystalline hard material has an end cutting surface, wherein the rotatable cutting element defines a second groove in a surface of the supporting substrate and a second frustoconical surface longitudinally spaced from the second internal groove; and a retention element disposed partially within the first groove and partially within the second groove. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A cutting element assembly, comprising:
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a sleeve defining a cylindrical cavity therein, wherein the sleeve defines a generally planar end surface; a rotatable cutting element disposed at least partially within the cavity of the sleeve, the rotatable cutting element comprising a polycrystalline hard material bonded to a substrate, the polycrystalline hard material having an end cutting surface generally parallel to the end surface of the sleeve, the substrate defining a bearing surface and a cylindrical portion extending into the cylindrical cavity of the sleeve, wherein the bearing surface is opposite the end cutting surface; and a bearing element between the end surface of the sleeve and the bearing surface of the rotatable cutting element. - View Dependent Claims (10, 11, 12, 13)
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14. A cutting element assembly, comprising:
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a sleeve defining a first interior cylindrical surface, a second interior cylindrical surface, and a generally planar axial bearing surface between the first interior cylindrical surface and the second interior cylindrical surface, wherein the first interior cylindrical surface, the axial bearing surface, and the second interior cylindrical surface together at least partially define a cavity in the sleeve; a rotatable cutting element disposed at least partially within the cavity, the rotatable cutting element comprising a polycrystalline hard material having an end cutting surface generally parallel to the axial bearing surface of the sleeve and mounted to a substrate, the substrate defining a first generally cylindrical surface, a second generally cylindrical surface, and an axial bearing surface opposite the end cutting surface and extending between the first generally cylindrical surface and the second generally cylindrical surface; wherein the substrate is substantially disposed within an interior of each of the first interior cylindrical surface and the second interior cylindrical surface with the axial bearing surface of the rotatable cutting element in contact with the axial bearing surface of the sleeve. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification