Invention Grant
- Patent Title: Polycrystalline diamond cutting elements with transition zones and downhole cutting tools incorporating the same
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Application No.: US14533716Application Date: 2014-11-05
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Publication No.: US10174561B2Publication Date: 2019-01-08
- Inventor: David R. Hall , Ronald B. Crockett , Neil Cannon , Dwain Norris , Madapusi K. Keshavan
- Applicant: SMITH INTERNATIONAL, INC.
- Applicant Address: US TX Houston
- Assignee: SMITH INTERNATIONAL, INC.
- Current Assignee: SMITH INTERNATIONAL, INC.
- Current Assignee Address: US TX Houston
- Main IPC: E21B10/573
- IPC: E21B10/573 ; E21B10/55 ; E21B10/567 ; B24D3/06 ; B24D18/00 ; E21B10/52

Abstract:
A cutting element may include a substrate including a plurality of metal carbide particles and a first metal binder having a first metal binder content; an outer layer of polycrystalline diamond material at an end of the cutting element, the polycrystalline diamond material including a plurality of interconnected diamond particles; and a plurality of interstitial regions disposed among the interconnected diamond particles, the plurality of interstitial regions containing a second metal binder having a second metal binder content. The cutting element also includes at least one transition zone between the substrate and the outer layer, the at least one transition zone including a plurality of refractory metal carbide particles and a third metal binder having a third metal binder content, the third metal binder content being less than the first metal binder content and the second metal binder content.
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