| 摘要 |
<p>A joint for connecting two or more tubular articles made of different metals comprises a first short pipe (2) connected to one metal tubular member and made of the same metal as the tubular member, a second short pipe (3) connected to another metal tubular member made of a metal different from the first metal tubular member, which second short pipe (3) is made of the same metal as the second tubular member and disposed to oppose the first short pipe (2) at an interval space, and an electrically insulating pipe (4) disposed between the first and second short pipes. Engaging means is provided respectively on the insulating pipe (4) and the first and second short pipes (2), (3) for engaging the insulating pipe (4) with the first and second short pipes (2), (3). The joint is capable of effectively preventing electrolytic corrosion and has a strength sufficient to withstand great external pressure, tensile and compressive loads which is likely to prevail at subterranean locations such as a deep well.</p> |
