Polycrystalline diamond cutting element

US8919463B2 · kind B2 · utility

Assignee

• NATIONAL OILWELL DHT, L.P. · US

Inventors

• Deepthi Raj Setlur · Cypress, US
• Michael Dean Hughes · Memphis, US
• Mark Jonathan Francis · Randwick, GB
• Harold A. Sreshta · Conroe, US
• Guodong Zhan · Spring, US
• Russell C. Gilleylen · Spring, US
• Jiinjen Albert Sue · Houston, US

Key dates

• Filing date: Oct 24, 2011
• Grant date: Dec 30, 2014
• Expiry date: Jan 26, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12576
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A polycrystalline-diamond cutting element for a drill bit of a downhole tool. The cutting element includes a substrate and a diamond table bonded to the substrate. The diamond table includes a diamond filler with at least one leached polycrystalline diamond segment packed therein along at least one working surface thereof. The cutting element may be formed by positioning the diamond table on the substrate and bonding the diamond table onto the substrate such that the polycrystalline diamond segment is positioned along at least one working surface of the diamond table. A spark plasma sintering or double press operation may be used to bond the diamond table onto the substrate.