Title:
METHODS OF FORMING POLYCRYSTALLINE DIAMOND COMPACTS AND RESULTING POLYCRYSTALLINE DIAMOND COMPACTS AND CUTTING ELEMENTS
Document Type and Number:
WIPO Patent Application WO/2013/043556
Kind Code:
A3
Abstract:
Methods for forming cutting elements comprising polycrystalline materials, methods for forming polycrystalline compacts for cutting elements of a drilling tool, method for forming polycrystalline diamond compacts, and resulting polycrystalline compacts and cutting elements are disclosed. Grains of a hard material are introduced to a press and subjected to a high pressure, high temperature (HPHT) process to sinter the grains. The system conditions (i.e., temperature and pressure) are then adjusted past a phase or state change point, after which, at least one of the system conditions is held during an anneal stage before the system conditions are adjusted to final levels. The resulting compacts and cutting elements may therefore include inter-granularly bonded hard material grains with a more stable microstructure (e.g., less stressed microstructure) than a polycrystalline compact and cutting element formed without an anneal stage during the HPHT process.
Inventors:
DIGIOVANNI ANTHONY A (US)
SCOTT DANNY E (US)
SCOTT DANNY E (US)
Application Number:
PCT/US2012/055842
Publication Date:
May 16, 2013
Filing Date:
September 18, 2012
Export Citation:
Assignee:
BAKER HUGHES INC (US)
DIGIOVANNI ANTHONY A (US)
SCOTT DANNY E (US)
DIGIOVANNI ANTHONY A (US)
SCOTT DANNY E (US)
International Classes:
E21B10/46; B01J3/06; B24D3/10; B24D18/00
Foreign References:
| US6521174B1 | 2003-02-18 | |||
| US20090173015A1 | 2009-07-09 | |||
| US20110030283A1 | 2011-02-10 | |||
| US20110061942A1 | 2011-03-17 |
Other References:
See also references of EP 2758621A4
Attorney, Agent or Firm:
WELBORN, Brian, S. et al. (Intellectual Property CounselP.O. Box 474, Houston TX, US)
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