Thomas John Dugan

US Patent:

20170197292, Jul 13, 2017

Filed:

Feb 6, 2017

Appl. No.:

15/424936

Inventors:

- Worthington OH, US
Thomas DUGAN - New Albany OH, US
Mark SCHWEIZER - Powell OH, US

International Classification:

B24D 3/00
E21B 10/567

Abstract:

A method for making a polycrystalline diamond compact including the step of providing a polycrystalline diamond compact. The compact has a substrate of a hard metal composition of material and a volume of diamond material disposed on the substrate. The diamond material includes a mixture of diamond particles and a binder-catalyst. At least one pre-coating layer of organic material impermeable to a given acid or mixture of given acids is applied to at least an exterior surface of the substrate. At least one layer of primer material that is impermeable to a given acid or mixture of given acids is applied on the at least one pre-coating layer. A layer of top coating material that is impermeable to the given acid or mixture of given acids is applied to the at least one primer layer. When the given acid or mixture of given acids is applied to the compact to leach the binder-catalyst from the diamond material the at least one pre-coating layer, at least one primer layer and layer of top coating material protect the coated portions of the compact.

US Patent:

20150352687, Dec 10, 2015

Filed:

Jun 9, 2015

Appl. No.:

14/734489

Inventors:

- Worthington OH, US
Thomas R. Dugan - New Albany OH, US

International Classification:

B24D 3/00
B24D 3/06

Abstract:

A method of treating a polycrystalline diamond (PCD) compact including a substrate and a layer of diamond material mixture of diamond particles and binder-catalyst disposed on the substrate. A leaching agent is applied to at least the layer of diamond material of the PCD compact. The leaching agent and a surface of the layer of diamond material are heated to a first temperature. The substrate is cooled to a second temperature. A first temperature gradient is established within the PCD compact to cause an inward diffusion of the leaching agent into at least the layer of diamond material. The cooling of the substrate is stopped and energy is applied directly to the PCD compact to heat the same to a third temperature. A second temperature gradient is established within the PCD compact to cause an outward diffusion of the binder-catalyst to remove the same from the layer of diamond material. The first and second temperature gradients can be repeated to accelerate removal of the reacted binder-catalyst from at least the layer of diamond material.

US Patent:

20150167396, Jun 18, 2015

Filed:

Dec 16, 2014

Appl. No.:

14/571577

Inventors:

- Worthington OH, US
Thomas DUGAN - New Albany OH, US
Mark SCHWEIZER - Powell OH, US

International Classification:

E21B 10/567
B24D 3/00

Abstract:

A method for making a polycrystalline diamond compact including the step of providing a polycrystalline diamond compact. The compact has a substrate of a hard metal composition of material and a volume of diamond material disposed on the substrate. The diamond material includes a mixture of diamond particles and a binder-catalyst. At least one pre-coating layer of organic material impermeable to a given acid or mixture of given acids is applied to at least an exterior surface of the substrate. At least one layer of primer material that is impermeable to a given acid or mixture of given acids is applied on the at least one pre-coating layer. A layer of top coating material that is impermeable to the given acid or mixture of given acids is applied to the at least one primer layer. When the given acid or mixture of given acids is applied to the compact to leach the binder-catalyst from the diamond material the at least one pre-coating layer, at least one primer layer and layer of top coating material protect the coated portions of the compact.