| 摘要 |
According to the invention, a method for designing a rotary drill bit for drilling a cavity in a medium is disclosed. The method may include determin ing a characteristic of a drillstring with which the rotary drill bit is cou pled. The method may also include determining an initial number of groups of cutters for the rotary drill bit, where each group of cutters includes a pl urality of cutters substantially aligned along a different radius of the dri lling face. The method may moreover include determining a characteristic of the medium relative to a characteristic of the cutters. The method may addit ionally include determining a characteristic of a rotational motion source u sed to rotate the rotary drill bit. The method may further include determini ng the angles of pitch between each of the groups of cutters to minimize an amount of sticking or slipping of the bit in the medium during a drilling op eration. |
