公开(公告)号：US3788408A

公开(公告)日：1974-01-29

申请号：US3788408D

申请日：1970-04-20

Applicant: DRESSER IND

Inventor： DYSART T

IPC: E21B10/23 ,  E21B10/24 ,  E21B21/00 ,  E21B9/08

CPC classification number: E21B21/002 ,  E21B10/23

Abstract: A rotary bit with passageways for conducting air or other gaseous fluid to cool the bearings and flush cuttings from the borehole includes means for separating liquid from the air or gas. The stream of air is directed through a system of baffles to insure that only dry air reaches the bearings.

Abstract translation: 具有用于导入空气或其它气体流体以冷却轴承并从井眼冲洗切屑的通道的旋转钻头包括用于从空气或气体分离液体的装置。 空气流通过挡板系统，以确保只有干燥空气到达轴承。