Polycrystalline diamond compact with conical base body

• Main Authors: TIAN JINGYAN, WU TIANQIAN, LI DEHONG, YU JIANBIN, XU HAO, SONG WENYU, XU YUCHAO, GUAN SHUWEI
• Format: Patent
• Language: Chinese; English
• Published: 28.12.2021
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention relates to a polycrystalline diamond compact for petroleum and geological drill bits, in particular to a polycrystalline diamond compact with a conical base body. The polycrystalline diamond compact with the conical base body comprises a conical hard alloy base body and a polycrystalline diamond layer. The hard alloy base body can be in a linear type conical shape, a curve type conical shape and a step type conical shape. When a PDC drill bit is used for drilling, the contact area of a PDC composite sheet base body and stratum rock is smaller, the PDC composite sheet in the shape can more easily penetrate into the stratum rock, so that the rock breaking efficiency is higher, and the mechanical drilling speed is higher. Meanwhile, the friction force of the drill bit during drilling is reduced due to the small contact area, and the stress damage probability of PDC cutting teeth is reduced. 本发明涉及石油和地质钻头所用聚晶金刚石复合片，具体是一种锥形基体的聚晶金刚石复合片。锥形基体的聚晶金刚石复合片包括锥形的硬质合金基底与聚晶金刚石层。硬质合金基体可以为直线型圆锥形的、曲线型圆锥形的和台阶型圆锥形的。PD