Selectively leached cutter,申请号AU20120245404-传众专利搜索

Selectively leached cutter

申请公布号：AU2012245404(A1)

申请号：AU20120245404

申请日期：2012.04.20

申请公布日期：2013.10.31

申请人：

HALLIBURTON ENERGY SERVICES, INC.

发明人：WHITTAKER, MALCOLM E.

分类号：E21B10/46

主分类号：E21B10/46

摘要：A method of manufacturing a polycrystalline diamond (PCD) cutting element used as drill bit cutting elements (10) is disclosed. The method comprises leaching a PCD body formed from diamond particles (202) using a binder- catalyzing material so as to remove substantially all of the binder-catalyzing material from portions of a cutting surface of the PCD body. A portion (24) of the cutting surface is identified as a cutting area which, in use of the cutting element to cut material, is heated by the cutting action of the cutting element. Leaching of the PCD body includes performing a relatively deep leach in the portion of the cutting surface identified as the cutting area and performing a relatively shallow leach in at least the portion (26) of the cutting surface surrounding the identified cutting area.