Improvements in or relating to the manufacture of

专利名称：Improvements in or relating to the

manufacture of cutting elements for rotarydrill bits

发明人：Griffin, Nigel Dennis申请号：EP88305391.0申请日：19880613公开号：EP0295151A2公开日：19881214

专利附图：

摘要：A cutting structure, for a rotary drill bit, is of the kind comprising a preformcutting element 18 having a front cutting face formed of superhard material, such as

polycrystalline diamond, 20 and a rear face bonded to a carrier 19 of less hard material,such as cemented tungsten carbide. The cutting element is bonded to the carrier bymeans of an ally having the following composition:     Ni      30 - 60%

    Pd      30 - 62%     Si      3 - 15% An alternative alloy has the followingcomposition:     Cr      4 - 10%     Fe      1 - 5%     Si      2 - 7%    C      0.01 - 0.10%     B      2 - 5%     Ni      Balance

申请人：CAMCO DRILLING GROUP LIMITED

地址：Hycalog Oldends Lane Industrial Estate Stonehouse, Gloucestershire GL10 3RQGB

国籍：GB

代理机构：Carter, Gerald

更多信息请下载全文后查看