Wear resistant material at the shirttail edge and leading edge of a rotary cone drill bit
AssigneeVarel International Ind., L.P.
InventorInpeng Bouaphanh
Life of this patent
Estimating the term…
Abstract
A rotary cone drill bit includes: a body, a leg depending from the body, a bearing shaft extending from the leg and a cone mounted to the bearing shaft. The leg includes a surface edge that is subject to wear during operation of the bit. A bottom surface of a hard material plate having an edge is attached to a conforming surface of the leg in a position where the edge of the hard material plate defines at least a portion of the surface edge of the leg. The attachment of the surfaces is made using a flowable material such as a brazing material.
Claims50
A rotary cone drill bit, comprising:
- a body;
- a leg depending from the body;
- a bearing shaft extending from the leg;
- a cone mounted to the bearing shaft;
- wherein the leg terminates at a shirttail edge adjacent a base of the cone;
- a preformed hard material plate having an edge and a bottom surface;
- and
- an adhesive material attaching the bottom surface of the hard material plate to a substantially conforming surface of the leg, wherein the edge of the hard material plate defines at least a portion of the shirttail edge.
A rotary cone drill bit, comprising:
- a body;
- a leg depending from the body;
- a bearing shaft extending from the leg;
- a cone mounted to the bearing shaft;
- wherein the leg includes a lateral leading edge;
- a preformed hard material plate having an edge and a bottom surface;
- and
- an adhesive material attaching the bottom surface of the hard material plate to a substantially conforming surface of the leg, wherein the edge of the hard material plate defines at least a portion of the lateral leading edge.
A rotary cone drill bit, comprising:
- a body;
- a leg depending from the body;
- a bearing shaft extending from the leg;
- a cone mounted to the bearing shaft;
- wherein the leg includes a surface edge;
- a preformed hard material plate having an edge and a bottom surface;
- an adhesive material attaching the bottom surface of the hard material plate to a substantially conforming surface of the leg, wherein the edge of the hard material plate defines at least a portion of the surface edge of the leg.
Dependencies are inferred from the claim text.