Impregnated drill bit
First Claim
Patent Images
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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Abstract
A drill bit that includes a body having a lower end face for engaging a rock formation. The end face having a plurality of raised ribs extending from the face of the bit body and separated by a plurality of channels therebetween At least one of the plurality of ribs has a varying width along at least a portion of a rib height.
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Citations
34 Claims
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1. A drill bit, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A drill bit, comprising:
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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 to an outermost surface 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 the at least one rib comprises at least one preformed insert embedded under the outermost surface of the rib, wherein the preformed insert consists essentially of super abrasive particles dispersed within a matrix material.
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14. A drill bit, comprising:
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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 at least one of the leading surface and the trailing surface of at least one of the plurality of ribs has at least one step formed therein, such that the at least one step results in a width decrease 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. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A drill bit, comprising:
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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, and wherein the height is measured along a vertical centerline of the rib between a base and an outermost surface of the rib; wherein at least a portion of at least one of the plurality of ribs has a gradual decrease in height from the vertical centerline along the width and a gradual decrease in width along the height of the rib, such that the portion has a parabolic cross-sectional geometric profile along a plane intersecting the width and 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. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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Specification