Element Six Gmbh

Baker Hughes Corporation

Element Six Abrasives S.a.

Humphrey Samkelo Lungisani Sithebe

Danny Eugene Scott

John Hewitt Liversage

Kaveshini Naidoo

Bronwyn Annette Kaiser

Terry Scanlon

James Doyle

Michael Lester Fish

James Martin Redmond

Desmond Kenneth Sullivan

An embodiment of a PCD insert comprises an embodiment of 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.

Polycrystalline diamond

A support structure () for a PCD element () comprises a support () into which a PCD element () is locatable and a sealing element () for location in the support structure () and configured to protect a non-leached portion of a PCD element () during a leaching process. The support () is formed from or coated with a polyketone based plastics material.

Support structure for a body of polycrystalline diamond material during leaching

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.

Polycrystalline diamond element

A method of producing a composite diamond compact comprising a polycrystalline diamond (PCD) compact bonded to a cemented carbide substrate is provided. The method includes the steps of: providing a PCD table, preferably a PCD table with diamond-to-diamond bonding and a porous microstructure in which the pores are empty of second phase material bringing together the PCD table and a cemented carbide substrate in the presence of a bonding agent to form an unbonded assembly; subjecting the unbonded assembly to an initial compaction at a pressure of at least 4.5 GPa and a temperature below the melting point of the bonding agent for a period of at least 150 seconds; and thereafter subjecting the unbonded assembly to a temperature above the melting point of the bonding agent and a pressure of at least 4.5 GPa for a time sufficient for the bonding agent to become molten and bond the PCD table to the substrate to form a composite diamond compact.

Method for producing a PCD compact

Growing community of inventors

Springs, South Africa

Humphrey Samkelo Lungisani Sithebe