公开(公告)号：US4128136A

公开(公告)日：1978-12-05

申请号：US859072

申请日：1977-12-09

Applicant: Robert E. Generoux

Inventor： Robert E. Generoux

IPC: B28D1/04 ,  E21B10/00 ,  E21B10/48 ,  E21B9/36

CPC classification number: E21B10/006 ,  B28D1/041 ,  E21B10/48

Abstract: A diamond drill coring bit having an annular crown and inner and outer concentric side surfaces. The crown is formed from a number of radially extending composite segments spaced apart circumferentially by a circumferential spacer material, all integrally bonded together. Each composite segment consists of a number of diamond impregnated segments spaced radially from each other by a radial spacer material. The diamond impregnated segments have greater abrasion resistance than that of the radial spacer material such that the radial spacer material will wear at a controlled rate greater than that of the diamond impregnated segments. The radial spacer material has greater abrasion resistance than that of the circumferential spacer material such that the circumferential spacer material will wear at a controlled rate greater than that of the radial spacer material but not so great as to prematurely expose the composite segments. The circumferential spacer material has good thermal conductivity to conduct heat from the composite segments, and substantial ductility to absorb drilling shocks.

Abstract translation: 金刚石钻头取芯钻头，具有环形冠和内外侧同心侧面。 冠由多个径向延伸的复合段形成，圆周间隔材料沿周向隔开，全部整体结合在一起。 每个复合片段由多个金刚石浸渍片段组成，这些片段通过径向间隔物材料彼此径向间隔开。 金刚石浸渍段具有比径向间隔物材料更高的耐磨性，使得径向间隔物材料以比金刚石浸渍段更受控制的速率磨损。 径向间隔物材料具有比周向间隔物材料更高的耐磨性，使得圆周间隔物材料以比径向间隔物材料大的受控速率磨损，但不会过大地暴露复合材料段。 圆周间隔材料具有良好的导热性，以便从复合材料段传导热量，并具有显着延展性以吸收钻井冲击。