Polycrystalline diamond element

US9297213B2 · kind B2 · utility

Assignees

• Baker Hughes Holdings LLC · US
• Element Six Limited · IE

Inventors

• John H. Liversage · Randburg, ZA
• Danny E. Scott · Conroe, US
• Humphrey Samkelo Lungisani Sithebe · Springs, ZA
• Kaveshini Naidoo · Springs, ZA
• Bronwyn Annette Kaiser · Springs, ZA
• Michael Lester Fish · Randburg, ZA

Key dates

• Filing date: Mar 8, 2010
• Grant date: Mar 29, 2016
• Expiry date: Oct 7, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2237/61
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A PCD insert comprises a PCD element joined to a cemented carbide substrate at an interface. The PCD element has internal diamond surfaces defining interstices between them. The PCD element comprises a masked or passivated region and an unmasked or unpassivated region, the unmasked or unpassivated region defining a boundary with the substrate, the boundary being the interface. At least some of the internal diamond surfaces of the masked or passivated region contact a mask or passivation medium, and some or all of the interstices of the masked or passivated region and of the unmasked or unpassivated region are at least partially filled with an infiltrant material.