公开(公告)号：US20140182945A1

公开(公告)日：2014-07-03

申请号：US13731499

申请日：2012-12-31

申请人： LONGYEAR TM. INC.

发明人： Christopher L. Drenth ,  Shakeel Khalfan

IPC分类号： E21B17/00

CPC分类号： E21B17/00

摘要： Implementations described herein comprise drill rods comprising an integral tubular metallic body having a first ends, an opposing second end, and an elongate midbody extending along a central axis between the first and second ends and where the metallic body defines a central bore that extends along the central axis and has a body inner surface and at least one body bore diameter. In further aspects, the drill rods further comprise an underlying tubular composite lining that has a lining outer surface that is connected to at least the body inner surface of the midbody of the metallic body, the composite lining defining an operative bore that extends along the central axis and has at least one operative bore diameter.

摘要翻译： 本文所述的实施方案包括钻杆，其包括整体管状金属体，其具有第一端部，相对的第二端部和沿第一和第二端部之间的中心轴线延伸的细长中间体，并且其中金属体限定沿着 中心轴线并具有主体内表面和至少一个体孔直径。 在另外的方面，钻杆还包括下面的管状复合衬里，其具有连接到金属体的中体的至少主体内表面的衬里外表面，复合衬里限定了沿中心延伸的操作孔 并且具有至少一个操作孔直径。