Drill bit having improved cutter configuration
AssigneeEastman Christensen Company
InventorMark L. Jones
Life of this patent
Estimating the term…
Abstract
The subject drill bits include a body member with cutter blades having a generally parabolic bottom profile. The cutter blades each include a diamond cutting face which increases in vertical height generally as a function of increased distance from the center line of the bit. The increased height allows the bits to provide a desired total diamond cutting volume at each radius of the bit, while allowing the diamond contact area to remain generally constant as the bit wears.
Claims20
A drill bit comprising:
- a body member;
- and
- at least one cutter blade on said body member, said cutter blade having a generally planar diamond cutting face extending from proximate the centerline of said bit generally outwardly, said cutting face having a generally continuous upper side and a generally continuous lower side, wherein the distance between said upper and lower sides of said cutting face increases generally continuously from the inner extent of said cutting face to the outer extent of said cutting face.
The drill bit of claim, 1 where said cutting blade extends from proximate the centerline of said bit to proximate the outer dimension of said bit.
A drill bit, comprising:
- a body member;
- and
- a plurality of cutter blades distributed on said body member, each cutter blade having a generally planar diamond cutting face, and having a height which increases generally continuously from the inner extent of said blade to the outer extent of said blade.
A drill bit, comprising:
- a body member constructed at least partially of an abrasion-resistant matrix;
- and
- a plurality of cutter blades on said body member, at least one of said cutter blades having a generally planar diamond cutting face with a generally parabolic profile and extending generally across the radius of said bit, said parabolic profile established by upper and lower sides which diverge in relation to increased distance from the center of said body member.
A method of constructing a drill bit, comprising:
- establishing a body member;
- and
- establishing at least one cutter blade on said body member, said cutter blade having a generally planar diamond cutting face with a generally parabolic shape, said parabolic shape established by upper and lower sides which diverge in relation to increased distance from the center of said body member, said cutter blade established by providing a volume of diamond to form a cutting face of said blade, said volume established in varying quantities along the length of said blade generally in response to distance from the center of said bit.
Dependencies are inferred from the claim text.