Polycrystalline diamond compact (PDC) bit balling is one of the major factors that limits the penetration rate of drilling and causes bit failure in soft stratum. In order to solve the PDC bit balling problem, in this research we designs typical bionic non-smooth surfaces and analyzes the anti-adhesion mechanisms. Next, the non-smoothness characterization is extended from a two-dimensional to three-dimensional in which the area ratio and the width ratio are used to characterize lateral and longitudinal non-smoothness. Then, a comparative experiment between typical non-smooth surfaces and the smooth surface condition is carried out. The results show that the scale-like non-smooth surface has the best anti-adhesion effect and that longitudinal non-smoothness has a greater influence on mud block adhesion than lateral non-smoothness. The research results also show that after applying the principle of anti-adhesion and resistance reduction for the non-smooth surface of soil animals to the design of the flow channel of a PDC drill bit, the novel bionic anti-balling PDC bit can effectively avoid the problem of bit balling.

聚晶金刚石复合片（PDC）钻头球化是限制钻进速度并导致软地层钻头失效的主要因素之一。为了解决PDC钻头球化问题，在本研究中，我们设计了典型的仿生非光滑表面并分析了抗粘连机制。接下来，非光滑度表征从二维扩展到三维，其中面积比和宽度比用于表征横向和纵向的非光滑度。然后，对典型的非光滑表面和光滑表面条件进行了对比实验。结果表明，鳞片状不光滑面的抗粘连效果最好，纵向不光滑对泥块附着力的影响大于横向不光滑。