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Impregnated drill bit

  • US 9,103,170 B2
  • Filed: 05/16/2008
  • Issued: 08/11/2015
  • Est. Priority Date: 05/16/2008
  • Status: Expired due to Fees
First Claim
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1. A drill bit, comprising:

  • a body having a lower end face for engaging a rock formation, the end face having a plurality of raised ribs extending a height from the face of the body and separated by a plurality of channels therebetween;

    wherein each of the plurality of ribs has a width measured between a leading surface and a trailing surface of the rib, wherein the leading surface faces in the direction of bit rotation and the trailing surface faces in a direction away from bit rotation;

    wherein the width of at least a portion of at least one of the plurality of ribs varies along at least a portion of the height of the rib; and

    wherein a major volume of the at least one rib comprises super abrasive particles impregnated within a supporting material formed from at least two different impregnated materials, wherein the two different impregnated materials have at least a difference in hardness and/or diamond concentration.

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