专利名称：Rotary drag bit with pdc gauge bearing pads
发明人：Matthias, Terry R.,Hayward, John,Lamb,
Haydn Richard
申请号：EP96301961.7
与梅同疏
申请日：19960321
公开号：EP0733776A3
公开日：
19971210
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何克抗>四位数
行为规范教育>松树高
专利附图：
腊肠焖饭电饭锅做法摘要：In a rotary drag-type drill bit, or other downhole component ud in subsurface drilling, bearing pads (16) which engage the surface of the earthen formation of the
borehole carry wear-resistant bearing inrts (20) received in sockets in the bearing pad.Each bearing inrt includes a preform element (21) of the kind normally ud as cutting elements in drag-type drill bits, and having a front facing table (23) of polycrystalline
diamond bonded to a less hard substrate (24). The preform element is orientated so that its front diamond surface is tangential to the surface of the bearing pad, or at a slight
angle thereto, so as to provide a highly wear-resistant, but non-aggressive bearing inrt.
软枣苗木The preform element may be bonded to or partly embedded in a carrier (22) which is received within the socket. The element or carrier may be formed with spaced longitudinal ribs (23) to allow it to be force-fitted into the socket, or the element or carrier may be cured within a hollow sleeve which is formed with such ribs.假白是什么意思
申请人：CAMCO DRILLING GROUP LIMITED
地址：Hycalog Oldends Lane Industrial Estate Stonehou, Gloucestershire GL10 3RQ GB
国籍：GB
代理机构：Carter, Gerald
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