Title:
PICK TOOL
Document Type and Number:
WIPO Patent Application WO/2012/152847
Kind Code:
A3
Abstract:
A pick tool for degrading asphalt or rock, comprising a PCD element; the PCD element comprising a PCD structure (20) bonded to a cemented carbide support body (30) at an interface; the PCD structure comprising a first region (24) and a second region (25) adjacent the first region, the second region bonded to the first region by intergrowth of diamond grains; the first region (24) comprising a plurality of alternating strata (24c, 24t), each stratum having a thickness in the range of about 30 to 300 microns; the second region comprising a plurality of strata (25a, 25b), one or more strata in the second region (25a) having a thickness greater than the thicknesses of the individual strata in the first region (24c, 24t), wherein the alternating strata in the first region (24) comprise first strata alternating with second strata, the first strata being in a state of residual compressive stress and the second strata being in a state of residual tensile stress.
Inventors:
JONKER CORNELIS ROELOF (ZA)
BOWES DAVID CHRISTIAN (ZA)
SHABALALA THEMBINKOSI (ZA)
CAN NEDRET (ZA)
BOWES DAVID CHRISTIAN (ZA)
SHABALALA THEMBINKOSI (ZA)
CAN NEDRET (ZA)
Application Number:
PCT/EP2012/058584
Publication Date:
June 06, 2013
Filing Date:
May 09, 2012
Export Citation:
Assignee:
ELEMENT SIX ABRASIVES SA (LU)
JONKER CORNELIS ROELOF (ZA)
BOWES DAVID CHRISTIAN (ZA)
SHABALALA THEMBINKOSI (ZA)
CAN NEDRET (ZA)
JONKER CORNELIS ROELOF (ZA)
BOWES DAVID CHRISTIAN (ZA)
SHABALALA THEMBINKOSI (ZA)
CAN NEDRET (ZA)
International Classes:
E21C35/183; E21B10/567
Domestic Patent References:
| WO2011069637A1 | 2011-06-16 |
Foreign References:
| US20100294571A1 | 2010-11-25 | |||
| US20030131787A1 | 2003-07-17 | |||
| US7694757B2 | 2010-04-13 | |||
| US20090263308A1 | 2009-10-22 | |||
| US5135061A | 1992-08-04 |
Attorney, Agent or Firm:
ATKINSON, Ian Anthony et al. (Group Intellectual Property3rd Floor, Building 4, Chiswick Park,,566 Chiswick High Road, London Greater London W4 5YE, GB)
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