公开(公告)号：US07866413B2

公开(公告)日：2011-01-11

申请号：US11404389

申请日：2006-04-14

申请人： Bruce Stauffer ,  William H. Heuser ,  Jim L. Jacobsen

发明人： Bruce Stauffer ,  William H. Heuser ,  Jim L. Jacobsen

IPC分类号： E21B7/04

CPC分类号： E21B10/00

摘要： Walk characteristics of an earth-boring rotary drill bit may be predicted by measuring locations and orientations of cutting elements thereof and calculating the magnitude and direction of an imbalance force of the drill bit using the measurements obtained. The calculated imbalance force may be compared to the imbalance force of at least one other drill bit having a calculated imbalance force and observed walk characteristics. An earth-boring rotary drill bit may be designed by constructing a database including the magnitude and direction of a calculated imbalance force and observed walk characteristics for a number of drill bits. Desired walk characteristics are selected, the database is referenced, and the bit may be configured to exhibit an imbalance force selected to impart desired walk characteristics to the drill bit. Drill bits are configured to exhibit an imbalance force oriented in a predetermined direction relative to a blade of the drill bit. A system may be employed to monitor the imbalance force of an operating drill bit and to provide or implement desirable operational parameters to compensate for same.

摘要翻译： 可以通过测量其切削元件的位置和取向并使用所获得的测量值来计算钻头的不平衡力的大小和方向来预测钻地旋转钻头的行走特性。 计算的不平衡力可以与具有计算的不平衡力和观察到的行走特性的至少一个其他钻头的不平衡力进行比较。 可以通过构造数据库来设计钻孔旋转钻头，所述数据库包括计算的不平衡力的大小和方向以及用于多个钻头的观察到的行走特性。 选择期望的行走特征，参考数据库，并且该位可以被配置为表现出选择的不平衡力以将期望的行走特征赋予钻头。 钻头被配置为表现出相对于钻头刀片沿预定方向定向的不平衡力。 可以采用系统来监测操作钻头的不平衡力并提供或实现所需的操作参数以补偿它们。