Invention Grant
- Patent Title: Bonding of cutters in diamond drill bits
- Patent Title (中): 金刚石钻头切割机的接合
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Application No.: US12582212Application Date: 2009-10-20
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Publication No.: US07997358B2Publication Date: 2011-08-16
- Inventor: Saul N Izaguirre , Thomas W. Oldham , Kumar T Kembaiyan , Gary Chunn , Anthony Griffo , Robert Denton , Brian A White
- Applicant: Saul N Izaguirre , Thomas W. Oldham , Kumar T Kembaiyan , Gary Chunn , Anthony Griffo , Robert Denton , Brian A White
- Applicant Address: US TX Houston
- Assignee: Smith International, Inc.
- Current Assignee: Smith International, Inc.
- Current Assignee Address: US TX Houston
- Main IPC: E21B10/46
- IPC: E21B10/46

Abstract:
A bit body formed of a mixture of matrix material and superabrasive powder and including pockets lined with superabrasive-free matrix material, and a method for forming the same, are provided. The pockets are shaped to receive cutting elements therein. The superabrasive-free matrix material enhances braze strength when a cutting element is brazed to surfaces of the pocket. The method for forming the drill bit body includes providing a mold and displacements. The displacements are coated with a mixture of superabrasive free matrix-material and an organic binder. The mold is packed with a mixture of matrix material and superabrasive powder and the arrangement heated to form a solid drill bit body. When the solid bit body is removed from the mold, pockets are formed by the displacements in the bit body and are lined with the layer of superabrasive-free matrix material. The superabrasive material may be diamond, polycrystalline cubic boron nitride, SiC or TiB2 in exemplary embodiments.
Public/Granted literature
- US20100101868A1 BONDING OF CUTTERS IN DIAMOND DRILL BITS Public/Granted day:2010-04-29
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