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Rolling cutter

  • US 7,703,559 B2
  • Filed: 09/25/2006
  • Issued: 04/27/2010
  • Est. Priority Date: 05/30/2006
  • Status: Active Grant
First Claim
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1. A cutting element for a drill bit, comprising:

  • an outer support element having at least a bottom portion and a side portion; and

    an inner rotatable cutting element, a portion of which is disposed in the outer support element and encased by the bottom portion and the side portion, the inner rotatable cutting element comprising;

    a substrate; and

    a diamond cutting face having a thickness of at least 0.050 inches disposed on an upper surface of the substrate; and

    wherein a distance from an upper surface of the diamond cutting face to a bearing surface between the inner rotatable cutting element and the outer support element ranges from 0 to about 0.300 inches; and

    wherein the inner rotatable cutting element further comprises a diamond base face at a lower surface of the substrate.

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