National Oilwell Dht, L.p.

Nov Downhole Eurasia Limited

Mark Jonathan Francis

Jiinjen Albert Sue

Guodong Zhan

Harold Sreshta

Russell C Gilleylen

Deepthi Raj Setlur

Michael D Hughes

Terry R Matthias

Haydn G Smith

Alan Honggen Jiang

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.

Polycrystalline diamond cutting element

A cutting element comprises a table of superhard material bonded to a substrate, wherein the table defines a cutting edge and has a chamfered peripheral edge, and a groove in a sidewall of the cutting element passes through the chamfered peripheral edge, so as to reduce the depth of the chamfer at the location of the groove.

Cutting element

Growing community of inventors

Randwick, United Kingdom

Mark Jonathan Francis