POLYCRYSTALLINE TABLES, POLYCRYSTALLINE ELEMENTS, AND RELATED METHODS

Title:

POLYCRYSTALLINE TABLES, POLYCRYSTALLINE ELEMENTS, AND RELATED METHODS

Document Type and Number:

WIPO Patent Application WO/2012/121942

Kind Code:

A3

Abstract:

Polycrystalline elements comprise a substrate and a polycrystalline table attached to an end of the substrate. The polycrystalline table comprises a first region of superabrasive material having a first permeability and at least a second region of superabrasive material having a second, lesser permeability, the at least second region being interposed between the substrate and the first region. Methods of forming a polycrystalline element comprise attaching a polycrystalline table comprising a first region of superabrasive material having a first permeability and at least a second region of superabrasive material having a second, lesser permeability to an end of a substrate, the at least a second region being interposed between the first region and the substrate. Catalyst material is removed from at least the first region of the polycrystalline table.

Inventors:

LYONS NICHOLAS J (US)
SCOTT DANNY E (US)
DIGIOVANNI ANTHONY A (US)
NELMS DEREK L

Application Number:

PCT/US2012/027071

Publication Date:

January 10, 2013

Filing Date:

February 29, 2012

Export Citation:

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Assignee:

BAKER HUGHES INC (US)
LYONS NICHOLAS J (US)
SCOTT DANNY E (US)
DIGIOVANNI ANTHONY A (US)
NELMS DEREK L

International Classes:

E21B10/46; B24D3/04; C22C26/00; E21B10/567; E21B10/573

Foreign References:

US20090095538A1	2009-04-16
US20110042149A1	2011-02-24
US5469927A	1995-11-28
US20090152015A1	2009-06-18

Other References: