CONNECTION STRUCTURE BETWEEN PIPE BODY AND JOINT OF ALUMINUM ALLOY DRILL PIPE

摘要

The present disclosure provides a connection structure between a pipe body and a joint of an aluminum alloy drill pipe, comprising a first joint located at an end of the aluminum alloy pipe body and a second joint, wherein the first joint comprises an external cone section, an external threaded section and a first seal end face sequentially provided from inside to outside thereof, and a taper of the external cone section is smaller than that of the external threaded section; wherein the second joint is cylindrical and comprises an internal cone section fitted with the external cone section, an internal threaded section fitted with the external threaded section, a second seal end face, an elevator shoulder face, and a concave arc transition section between the internal cone section and the internal threaded section.